CN100481237C - Audio signal encoding and reproducing apparatus - Google Patents

Abstract

An encoding and decoding method of an audio signal is provided. The encoding method of the above-mentioned audio signal comprises the following steps: the channel group comprising the left front channel and the right front channel as the front of the first channel group and the channel group used as the rear of the second channel group are allocated to the multi-channel respectively. In the channel group including the left surround channel and the right surround channel, and according to the different sampling frequencies of the channels of the first channel group and the second channel group, quantization is performed to generate the above-mentioned first channel respectively The first digital sound signal of the group and the second digital sound signal of the above-mentioned second channel group; the above-mentioned second digital sound signal is bit-shifted with the same bit displacement amount for the sound channels of the above-mentioned second channel group to generate the third a digital sound signal; and formatted as a data structure having an audio title set including a plurality of audio objects composed of audio packs configured with the first digital sound signal and the third digital sound signal.

Description

Encoding and decoding method of audio signal

This application is a divisional application of the application filed on November 19, 1998 with the application number 98124848.9 and the title of the invention is "Audio Signal Coding Device, Turntable and Its Playback Device".

technical field

The invention relates to a coding device for audio signals, a disc and its reproducing device, and an audio reproducing device.

Background technique

As a conventional optical disc for audio reproduction, a CD (Compact Disc) is known. DVD (Digital Video Disc) is known as an optical disc having a higher density than CD.

But, in DVD (hereinafter referred to as DVD video disc), because be mainly to record video signal, secondary record audio signal, and there is following problem:

(1) When an audio signal and a video signal are integrated, the recording capacity of the audio signal is small.

(2) The time of the audio signal cannot be managed.

(3) Simple text information such as song titles cannot be extracted.

Compared with the video disk, the users of the turntable have a wider range of use, so by providing a TOC (Table of Contents) area like a CD, a simple playback method can be obtained. However, in a DVD video disc, the video directory block unit is composed of a pilot control packet (CONT packet) and multiple video (V) packets and audio (A) packets, and the playback of V and A packets is controlled by the CONT packet. Therefore, in the case where the audio signal is mainly recorded, the user cannot easily perform playback, and there is a problem that the usability deteriorates.

In the DVD video disc, since the time management is only performed in units of video frames, in the case of recording mainly based on the audio signal, compared with the video disc, the continuity of the audio signal is important, and real-time management is difficult. of such problems.

Contents of the invention

The purpose of technical scheme 1 of the present invention is to provide a kind of coding method of sound signal, it is characterized in that, comprises the following steps: with the front side that is assigned to multi-channel as the first channel group respectively, comprises left front channel and right front sound channel group and the channel group including the left surround channel and the right surround channel used as the rear of the second channel group, and are different according to the respective channels of the first channel group and the second channel group And different sampling frequency, carry out quantization, generate the first digital sound signal of above-mentioned first sound channel group and the second digital sound signal of above-mentioned second sound channel group respectively; The bit displacement amount shifts the above-mentioned second digital sound signal bit to generate a third digital sound signal; The audio title group of a plurality of audio objects constituted by the audio package of the above-mentioned audio package is configured with: the sampling frequency of each channel of the above-mentioned first channel group and the above-mentioned second channel group; for the above-mentioned second channel group the same bit shift amount for each channel of the channel group; and channel assignment information respectively specifying each channel of the first channel group and the second channel group assigned above, and in the audio title of the above audio title group The group information is configured with: the sampling frequency of each channel of the above-mentioned first channel group and the above-mentioned second channel group; the same bit shift amount for each channel of the above-mentioned second channel group; The channel assignment information of each channel of the first channel group and the second channel group.

The purpose of the technical solution 2 of the present invention is to provide a sound signal decoding method, which decodes the data encoded by the sound signal coding method described in the technical solution 1, which is characterized in that it includes the following steps: The above-mentioned first digital sound signal and the above-mentioned third digital sound signal arranged in the packet; the sampling frequency of the above-mentioned each channel arranged in the dedicated header of the above-mentioned audio packet or the audio title set information of the above-mentioned audio title set, and the above-mentioned same bit displacement, and the above-mentioned channel allocation information; and according to the sampling frequency of each of the above-mentioned extracted channels, the above-mentioned same bit displacement, and the above-mentioned channel allocation information, the above-mentioned first digital sound signal and the above-mentioned third digital sound signal Sound signal decoding.

It is an object of the present invention to provide a turntable that enables a user to easily reproduce audio signals and facilitate real-time management when audio signals are mainly recorded.

The object of the present invention is to provide a playback device for the disc.

The object of the present invention is to provide an encoding device for audio signals.

It is an object of the present invention to provide an audio playback device which can be constructed inexpensively in the case of playback with a data structure comprising a first packet with audio data as actual data, with real-time information related to the audio data As the second pack of actual data, the third pack has still picture data related to audio data, and the still picture is reproduced in synchronization with the audio signal, or the page is turned and displayed independently of the reproduction of the audio signal.

It is an object of the present invention to provide an audio playback device that can be configured inexpensively when A/D conversion is performed on audio data and multi-channel audio data at two sampling frequencies.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an audio reproducing apparatus capable of effectively coping with copying when copyright data related to audio data and still picture data is recorded on a disc.

In a CD, character information indicating the content of music sources is distributed and recorded on the disc, so it is difficult to display while following the music source being played back while changing instantaneously. Therefore, for the music source (A) being played back, the text (V) cannot be displayed with the A-V effect.

Therefore, in the DVD (Digital Video Disc)-video disc, in the case of recording subtitle superimposition and the like of moving images such as movies, the records are arranged continuously. However, in the case of DVD, if a DVD recorder is mainly recorded on a disc such as a music source, there is a problem that the ratio of audio data is reduced in this method.

In view of the above-mentioned problems, it is an object of the present invention to provide a coding device, a disk and a disk playback system capable of effectively recording and displaying an audio signal of text information representing its content when audio data such as a music source is mainly used for recording. device.

In order to achieve the above object, the present invention sets an audio title set that does not contain playback control packets but has audio data and still picture data, and a management area that contains information for managing the above audio title set, instead of a video title set and a management area that contains the information for managing the above-mentioned audio title set. Management area for the information of the video title group.

That is, according to the present invention, there is provided a disc recording data structure having:

An audio title set having audio data and still picture data without a playback control pack;

having a first management area containing information for managing the audio title set;

A second management area that does not contain video title sets but contains information for managing the aforementioned video title sets.

According to the present invention, there is provided a coding device for audio signals, which has a data structure formatted into a data structure that does not contain packets for playback control, and has an audio title set and containment management for audio data and still picture data. A first management area for information on the above-mentioned audio title set; a second management area not including the video title set but including information for managing the above-mentioned video title set.

According to the present invention, there is provided a coding device for audio signals, which has a data structure formatted into a data structure that does not contain packets for playback control, and has an audio title set and containment management for audio data and still picture data. A first management area for the information of the above-mentioned audio title group; a second management area not including the video title group but including the information for managing the above-mentioned video title group, the audio data in the above-mentioned audio title group includes A/D at the first sampling frequency At least one of the converted first audio data and the second audio data A/D converted at the second sampling frequency.

According to the present invention, there is provided a coding device for audio signals, which has a data structure formatted into a data structure that does not contain packets for playback control, and has an audio title set and containment management for audio data and still picture data. The first management area of the information of the above-mentioned audio title group; the second management area not including the video title group and including the information for managing the above-mentioned video title group, and the above-mentioned audio data is A/D converted at the first sampling frequency which is a multiple of 48kHz And data with a frame rate of 1/600 second and data with a frame rate of 1/551.25 second subjected to A/D conversion at a second sampling frequency that is a multiple of 44.1 kHz.

According to the present invention, there is provided a coding device for audio signals, which has a data structure formatted into a data structure that does not contain packets for playback control, and has an audio title set and containment management for audio data and still picture data. The first management area of the information of the above-mentioned audio title group; the second management area not including the video title group and including the information for managing the above-mentioned video title group, and the above-mentioned audio data is A/D converted at the first sampling frequency which is a multiple of 48kHz And the frame rate is 1/600 second data and the second sampling frequency which is a multiple of 44.1kHz is A/D converted and the frame rate is 1/551.25 second data, when the above-mentioned first sampling frequency is 192kHz and the above-mentioned second sampling When the frequency is 176.4 kHz, playback control information prohibiting emphasis playback is recorded in the first management area.

According to the present invention, there is provided a disc reproducing device, which has the capability of reproducing the audio data in the audio title group not based on the playback control pack but based on the information in the first management area on the disc recording the above-mentioned data structure. and still picture data.

In order to achieve the above object, the present invention is: when playing back a first packet having audio data as actual data, a second packet of real-time information data associated with audio data as actual data, and a still packet associated with audio data as actual data. In the case of the data structure of the third pack of picture data, it is reproduced by three systems of buffers and decoders.

That is, according to the present invention, there is provided an audio playback apparatus that plays back a data structure having an audio title set (ATS) and a still picture set (SPS) including a plurality of audio objects (AOBs),

The above AOB is composed of the following two AOBs:

a first AOB consisting only of first packets having audio data as actual data;

a second AOB composed of a second pack having said first pack and real-time information data associated with said audio data as actual data,

Also, said SPS has a third pack containing still picture data associated with said audio data,

It is characterized in that the audio playback device also includes:

a packet distributing means for distributing the above-mentioned first, second and third packets;

storing the first buffer of the first packet allocated by the above-mentioned packet allocation means;

first decoding means for decoding audio data according to the first packet stored in the first buffer;

storing a second buffer for a second packet allocated by the above-mentioned packet allocation means;

a second decoder for decoding real-time information data according to a second packet stored in said second packet;

a third buffer storing a third packet allocated by the above-mentioned packet allocation means;

A third decoder that decodes the still picture data based on the third pack stored in the above-mentioned third pack.

The present invention performs D/A conversion according to one system when A/D conversion is performed on audio data and multi-channel audio data at sampling frequencies of two systems.

That is, according to the present invention, there is provided an audio playback apparatus in which the first audio data A/D converted at the sampling frequency of the first system and the second audio data A/D converted at the sampling frequency of the second system are at least Selectively replaying the transmitted data structure together with its sampling frequency data, characterized in that it comprises:

A device for judging the sampling frequency of the audio data played back from the replay according to the above sampling frequency data;

A rate converting device for converting the audio data rate of the first system into the sampling frequency of the second system according to the above-mentioned judgment result;

A D/A converter for performing D/A conversion on audio data at a sampling frequency of the second system.

In the present invention, when copyright data related to audio data and still picture data is recorded on a disc, the still picture data and copyright data are synthesized to display superimposed subtitles.

That is, according to the present invention, there is provided an audio reproducing apparatus for reproducing a data structure having audio data, copyright data related to the audio data, and still picture data related to the audio data, characterized in that

There is means for displaying copyrighted data and still picture data related to the audio data during playback of the audio data.

According to the present invention, there is provided an audio reproducing apparatus for reproducing a data structure including audio data, still picture data related to the audio data, and copyright data related to the still picture data, wherein:

There is means for synthesizing and displaying still picture data and copyright data related to the still picture data during playback of the audio data.

Description of drawings

These and other objects, advantages and features of the present invention will be further clarified by describing the embodiments of the present invention with reference to the accompanying drawings. In these drawings:

Fig. 1 is a schematic view showing an embodiment of the format of a DVD video disc and the format of a DVD audio disc involved in the present invention;

FIG. 2 is a schematic diagram showing in detail the format of the Audio Manager (AMG) of FIG. 1;

Fig. 3 is a schematic diagram showing in detail the format of the Audio Title Set (ATS) of Fig. 1;

4 is a schematic diagram showing in detail the format of the audio manager information (AMGI) of FIG. 2;

Fig. 5 is a schematic diagram showing in detail the format of the Audio Title Set Attribute Table (ATS-ATRT) of Fig. 4;

FIG. 6 is a schematic diagram showing in detail the format of the audio title set attribute data (ATS_ATR) of FIG. 5;

FIG. 7 is a schematic diagram showing in detail the format of the audio title set information (ATSI) of FIG. 3;

FIG. 8 is a schematic diagram showing in detail the format of the Audio Title Set Information Manager Table (ATSI-MAT) of FIG. 7;

FIG. 9 is a schematic diagram showing in detail the audio title set menu·audio stream·attribute data (ATSM_AST_ATR) of FIG. 8;

Fig. 10 shows in detail the schematic diagram of the format of the audio title set · audio stream · attribute table (ATS_AST_ATRT) of Fig. 8;

Fig. 11 is a schematic diagram showing in detail the attribute data (ATS_AST_ATR) of each audio stream of Fig. 10;

Fig. 12 is a schematic diagram representing the audio directory block unit (ACBU) of Fig. 1;

Fig. 13 is a schematic diagram showing in detail the format of the audio packet and the video packet of Fig. 12;

Fig. 14 is a schematic diagram showing in detail the format of the audio control (A_CONT) packet of Fig. 12;

Fig. 15 (A), (B), (C) are schematic diagrams and deformation schematic diagrams showing in detail the format of the audio character display (ACD) area of Fig. 14;

FIG. 16 is a diagram showing an example displayed by the namespace information of FIG. 15 and a modified diagram;

Fig. 17 (A), (B), (C) are schematic diagrams showing the format of the audio retrieval data (ASD) area of Fig. 14 in detail;

FIG. 18 is a schematic diagram showing a modified example of the audio directory block unit of FIG. 1;

Fig. 19 is a block diagram showing a playback device for a DVD disc according to the present invention;

Fig. 20 is a block diagram functionally representing the playback device of Fig. 19; wherein Fig. 20 (A), (B), (C) is a block diagram representing a character display circuit and a block diagram representing a modification of the DVD playback device;

Fig. 21 is a diagram showing in detail the format of the audio manager information (AMGI) in the second embodiment;

Fig. 22 is a schematic diagram showing in detail the TOC information of Fig. 21;

Fig. 23 shows in detail the schematic diagram of the format of the audio title set information (ATSI) in the modified example of the second embodiment;

Fig. 24 is a block diagram showing the reproducing apparatus of the DVD disc of the second embodiment;

Fig. 25 is a block diagram functionally representing the playback device of Fig. 24;

Fig. 26 is a block diagram showing TOC information and reproducing means in the third embodiment;

Fig. 27 is a flowchart for explaining AV synchronous playback processing;

Fig. 28 is a flowchart for explaining AV synchronous playback processing;

Fig. 29 is a schematic view showing the basic format of the DVD disc of the fourth embodiment;

Fig. 30 is a schematic diagram showing the audio data structure of the DVD disc of Fig. 29;

Fig. 31 is a schematic diagram representing the basic format of a DVD-Van disc;

Figure 32 is a schematic diagram representing the basic format of a DVD video disc;

Fig. 33 is a schematic diagram representing the basic format of a DVD-Avd disc;

Fig. 34 is the schematic diagram showing the AOTT-AOB-ATR in the DVD disc of the fourth embodiment;

Fig. 35 is a schematic diagram showing the dedicated header of the linear PCM in the DVD-Avd disc of the fourth embodiment;

Fig. 36 is a flowchart showing ATS and still picture playback processing in the playback device of the fourth embodiment;

37 is a flowchart showing frame playback processing corresponding to the sampling frequency of audio data in the playback apparatus of the fourth embodiment;

38 is a flowchart showing emphasis playback processing of audio data in the playback apparatus of the fourth embodiment;

Fig. 39 is a flow chart showing the emphasis playback process of audio data in the playback device of the fourth embodiment; wherein Fig. 39 (A), (B), (C), (D) are DVD audio files showing modified examples. Schematic diagram of playback device, text display circuit and recording area of V-RAM;

FIG. 40 is a block diagram showing an embodiment of an audio signal encoding device according to the present invention;

Fig. 41 is a block diagram showing in detail the signal processing circuit of Fig. 40;

Fig. 42 is a schematic diagram of the data structure of the fifth embodiment;

FIG. 43 is a schematic diagram showing in detail the audio object set (AOTT_AOBS) for audio-only titles in FIG. 42;

Fig. 44 is a schematic diagram showing an example of the audio pack of Fig. 43 in detail;

Fig. 45 is a schematic diagram showing in detail the dedicated header of Fig. 44;

Fig. 46 is a schematic diagram showing the UPC/EAN-ISRC data of Fig. 45 in detail;

Fig. 47 is a schematic diagram representing the bit shift of the audio data of Fig. 44;

Figure 48 is a schematic diagram showing in detail the real-time information (RTI) packet of Figure 43;

FIG. 49 is a schematic diagram showing in detail the still picture set (SPS) of FIG. 43;

FIG. 50 is a diagram showing in detail the format of the Audio Title Set Information Manager Table (ATSI-MAT) of FIG. 42;

FIG. 51 is a schematic diagram showing in detail the audio object attribute (AOTT_AOB_ATR) for the audio-specific title in FIG. 50;

FIG. 52 is a schematic diagram showing in detail the video object audio stream attributes (AOTT_VOB_AST_ATR) for audio-only titles in FIG. 50;

Fig. 53 is a schematic diagram showing in detail the channel assignment information of Fig. 51 and Fig. 52;

Fig. 54 is a schematic diagram showing in detail the down-mixing coefficient (ATS_DM_COEFT) of Fig. 50;

Fig. 55 is a schematic diagram showing in detail the still picture data attribute (ATS_SPCT_ATR) of Fig. 50;

Fig. 56 is a schematic diagram showing in detail the audio title set program chain information table (ATS_PGCIT) of Fig. 42;

Fig. 57 is a schematic diagram showing in detail the ATS_PGCIT information (ATS_PGCITI) of Fig. 56;

Fig. 58 is a schematic diagram showing in detail the ATS_PGCIT search pointer (ATS_PGCI_SPR) of Fig. 56;

Figure 59 is a schematic diagram showing in detail the ATS-PGC カテゴリ-(ATS-PGCI-CAT) of Figure 58;

Fig. 60 is a schematic diagram showing in detail the audio title set program chain information (ATS_PGCI) of Fig. 56;

Figure 61 is a schematic diagram showing in detail the ATS-PGC general information (ATS-PGCI-GI) of Figure 60;

Fig. 62 is a schematic diagram showing in detail the ATS-PGC catalog (ATS-PGCI-CNT) of Fig. 61;

Fig. 63 is a schematic diagram showing in detail the ATS program information table (ATS_PGIT) of Fig. 60;

Fig. 64 is a schematic diagram showing in detail the ATS program information (ATS_PGI) of Fig. 63;

Fig. 65 is a schematic diagram showing in detail the ATS-PG catalog (ATS-PG-CNT) of Fig. 64;

Fig. 66 is a schematic diagram showing in detail the ATS unit playing packet information table (ATS-C-PBIT) of Fig. 63;

Fig. 67 is a schematic diagram showing in detail the ATS unit playing packet information (ATS-C-PBI) of Fig. 66;

Figure 68 is a schematic diagram showing in detail the ATS-C type (ATS-C-TY) of Figure 67;

Fig. 69 is a block diagram showing an encoding device of a fifth embodiment;

Fig. 70 is a flowchart showing the processing of the encoding device of Fig. 69;

Fig. 71 is a block diagram showing a decoding apparatus of the fifth embodiment;

Figure 72 is a block diagram functionally representing the decoding device of Figure 71;

Fig. 73 is a flow chart showing the processing of the decoding device in Fig. 71 and Fig. 72;

Fig. 74 is a block diagram showing in detail the decoding apparatus of the fifth embodiment;

Fig. 75 is a flowchart showing playback processing of audio signals and still picture data by the decoding apparatus of Fig. 74;

FIG. 76 is a flowchart showing the page turning process of the still picture in the decoding device of FIG. 74;

Figure 77 is a block diagram representing a modified example of the audio decoder of Figure 74;

Fig. 78 is a schematic diagram showing the processing of the sampling rate converter of Fig. 77;

Fig. 79 is a block diagram showing in detail the copyright data display device of the decoding device of the fifth embodiment;

Fig. 80 is a flowchart representing the copyright data display device of the device of Fig. 79;

Fig. 81 is a block diagram showing the packaging device when the audio signal is transmitted according to the fifth embodiment;

Fig. 82 is a flow chart showing the packing process of the packing device of Fig. 81;

Fig. 83 is a flowchart showing in detail the packet generation device of Fig. 82;

Fig. 84 is a flowchart showing in detail the ATS generation process of Fig. 82;

Fig. 85 is a flow chart showing transmission processing of the packaging device of Fig. 81;

Fig. 86 is a block diagram showing an unpacking device when transmitting an audio signal according to the fifth embodiment;

Fig. 87 is a flow chart showing the receiving process of the unpacking device of Fig. 86;

Fig. 88 is a flow chart showing the unpacking process of the unpacking device of Fig. 86;

Fig. 89 is a flowchart showing in detail the ATSI decoding process of Fig. 81;

Fig. 90 is a flowchart showing in detail the packet decoding process of Fig. 88 .

Detailed ways

Embodiments of the present invention will be described below with reference to the drawings. Fig. 1 is a schematic view showing an embodiment of the format of a DVD video disc and the format of a DVD audio disc involved in the present invention, Fig. 2 is a schematic view showing the format of the audio manager (AMG) of Fig. 1 in detail, and Fig. 3 is a detailed representation 1 is a schematic diagram of the format of the audio title set (ATS), and FIG. 4 is a schematic diagram of the format of the audio manager information (AMGI) of FIG. 2 in detail, and FIG. 5 is a detailed representation of the audio title set of FIG. ATRT) format diagram, FIG. 6 is a schematic diagram showing in detail the format of the audio title set attribute data (ATS-ATR) in FIG. 5, and FIG. 7 is a schematic diagram showing in detail the format of the audio title set information (ATSI) in FIG. , Fig. 8 is a schematic diagram showing in detail the format of the audio title set information · manager table (ATSI-MAT) of Fig. 7, and Fig. 9 is a detailed representation of the audio title set menu · audio stream · attribute data (ATSM_AST- ATR), Fig. 10 is a schematic diagram showing in detail the format of the audio title set, audio stream, attribute table (ATS-AST-ATRT) of Fig. — Schematic diagram of AST-ATR).

Fig. 12 is a schematic diagram showing the audio directory block unit (ACBU) of Fig. 1, Fig. 13 is a schematic diagram showing in detail the format of the audio packet and video packet of Fig. 12, and Fig. 14 is a detailed diagram showing the audio control (A-CONT) of Fig. 12 The schematic diagram of the format of the package, Figure 15 (A), (B), (C) is a schematic diagram and a modified schematic diagram of the format of the audio character display (ACD) area of Figure 14 in detail, and Figure 16 is a schematic diagram of the name space represented by Figure 15 Figure 17 (A), (B), (C) is a schematic diagram showing in detail the format of the audio search data (ASD) area of Figure 14, Figure 18 is a schematic diagram showing the audio directory block unit of Figure 1 A schematic diagram of the modified example.

Fig. 19 is a block diagram showing a playback device of a DVD disc according to the present invention, Fig. 20 is a block diagram functionally showing the playback device of Fig. 19, and Fig. 21 is a detailed representation of the audio manager information in the second embodiment ( AMGI) format, FIG. 22 is a schematic diagram showing in detail the TOC information in FIG. 21, FIG. 23 is a schematic diagram showing in detail the format of the audio title set The block diagram of the reproducing apparatus of the DVD audio disc of the second embodiment, Fig. 25 is the block diagram that functionally represents the reproducing apparatus of Fig. 24, Fig. 26 is the block diagram representing TOC information and reproducing apparatus in the 3rd embodiment, Fig. 27 and FIG. 28 are flowcharts for explaining AV synchronized playback processing.

Among them, in the DVD recorder described above, in order to adapt to the transition period when transitioning from CD to DVD recorder, both stereophonic two-channel and 5/6/8-channel multi-channel signals are recorded as audio. Signal. After the transition period passes, it may be considered to record only 5/6/8-channel multi-channel signals.

Fig. 1(a), (b) respectively show the respective formats of DVD video disc and DVD video disc, and the name of the region of the format of DVD video disc is different, but has compatibility with DVD video disc. First of all, it is roughly divided into: the format of the DVD video disc is composed of the video manager (VMG) at the beginning and each area of a plurality of video title sets (VTS) following it; on the other hand, the format of the DVD disc is correspondingly composed of The audio manager (AMG) shown in detail in FIG. 2 is constituted by each area of a plurality of audio title sets (ATS) following the AMG as shown in detail in FIG. 3 .

The VTS is composed of the VTS information (VTSI) at the beginning, followed by one or more video directory block settings (VCBS) and the last VTSI. On the other hand, corresponding to it, the ATS is composed of the ATS information (ATSI) at the beginning, It is followed by one more Audio Content Block Set (ACBS) and finally ATSI composition. Set the performance time of each track in ACBS in real time in ATSI.

In the present invention, menu information for displaying a menu screen is recorded in the first ACBS. It is the same as a DVD video disc, and its description is omitted.

Each VCBS is composed of a plurality of VCBs, and on the other hand, each ACBS is composed of a plurality of ACBs. Each VCB is a title (Title) of the video, and correspondingly, each ACB is a title of the audio. Each VCB (one title) is composed of a plurality of chapters (Chapter), while each ACB (one title) is composed of a plurality of tracks (Track). A segment contains a title part (PTT), and a track contains a title part (PTT).

Each segment is constituted by a plurality of cells (CELL), and correspondingly, each track is constituted by a plurality of indices (Index). Each unit is composed of a plurality of VCB units (VCBU), and correspondingly, each index is composed of a plurality of ACB units (ACBU). Each VCB unit and ACB unit consists of multiple packets, and one packet consists of 2048 bytes.

Each VCB unit consists of a leading control packet (hereinafter referred to as a CONT packet), followed by a plurality of video (V) packets, audio (A) packets, and sub-picture (SP) packets. Correspondingly, each ACB unit is composed of an audio control pack at the head (hereinafter referred to as an A-CONT pack), followed by a plurality of A packs and V packs.

In the CONT pack, information for controlling the subsequent V pack is arranged, and in the A-CONT pack, information for managing the audio signal of the subsequent A pack is arranged like the TOC information of a CD. Audio data is arranged in the A packet, and closed caption (CC) data other than the audio data, for example, is arranged in the V packet in addition to the video data.

As shown in Figure 2, AMG (Audio Manager) has:

- Audio Manager Information (AMGI) detailed in Figure 4;

AMG menu is set with audio directory block (AMGM—ACBS);

· AMGI is used for backup.

AMGM-ACBS has as control information:

· Projection Control Information (PCI);

• Data Search Information (DSI).

As shown in Figure 3, ATS (Audio Title Set) has:

- Audio Title Set Information (ATSI) detailed in Figure 7;

ATS menu is set with audio directory block (ATSM—ACBS);

The ATS title is set with the audio directory block (ATSA-ACBS);

· Backup with ATSI.

Both ATSM-ACBS and ATSA-ACBS have the PCI and DSI mentioned above (Fig. 2).

As shown in detail in Figure 4, AMGI (Audio Manager Information) has:

AMGI manager table (AMGI-MAT);

· Title search pointer table (T-SRPT);

·Audio Manager Menu PGCI Unit Table (AMGM—PGCI—UT);

·Double Lease Management Information Form (PTL-MAIT);

Audio Title Set Attribute Table (ATS_ATRT) detailed in Figure 5;

·Text data manager (TXTDT-MG);

·Audio Manager Menu Unit (Index) Address Table (AMGM-C-ADT);

• Audio Manager Menu • Audio Directory Block Unit • Address Map (AMGM_ACBU_ADMAP).

As shown in detail in Figure 5, ATS-ATRT (Audio Title Set Attribute Table) has:

Audio Title Set Attribute Table Information (ATS-ATRTI);

Multiple (n) ATSs of each audio title set attribute retrieval pointer (ATS-ATR-SRP#1~#n);

- Individual audio title set attribute data (ATS_ATR_#1 to #n) of a plurality of (n) ATSs as shown in detail in FIG. 6 .

As shown in detail in Figure 6, each audio title set attribute data (ATS_ATR_#1~#n) has:

ATS—ATR—EA (end address);

ATS—CAT (カテゴリ—);

• ATS—ATRI (information).

As shown in detail in Figure 7, the ATSI (Audio Title Set Information) shown in Figure 3 has

have:

Audio Title Set Information Manager Table (ATSI_MAT) shown in detail in FIG. 8;

· Audio title set · Title part · Retrieval pointer table (ATS-PTT-SRPT);

Audio Title Set Program Chain Information Table (ATS-PGCIT);

· Audio Title Group Menu · PGCI · Unit Table (ATSM-PGCI-UT);

Audio Title Set Time Chart (ATS—TMAPT);

Audio Title Group Menu Unit Address Table (ATSM-C-ADT);

Audio Title Group Menu Audio Directory Block Unit Address Map (ATSM—ACBU—ADMAP);

Audio Title Set Unit Address Table (ATS-C-ADT);

• Audio Title Set • Audio Directory Block Unit • Address Map (ATS_ACBU_ADMAP).

As shown in Figure 8 in detail, the ATSI-MAT (Audio Title Set Information Manager Table) shown in Figure 7 has:

ATS-ID (identifier);

ATS—EA (end address);

· ATSI-EA;

VERN (version number of the DVD-Audio standard);

ATS—CAT (カテゴリ—);

·ATSI—MAT—EA;

· ATSM—ACBS—SA (start address);

ATSA—ACBS—SA;

ATS—PTT—SRPT—SA;

·ATS—PGCIT—SA

·ATSM—PGCI—UT—SA;

ATS—TMAP—SA;

·ATSM—C—ADT—SA;

ATSM—ACBU—ADMAP—SA;

ATSM_AST_ATR (audio stream attribute of ATSM) as shown in Fig. 9 in detail;

ATS-AST-Ns (number of audio streams of ATS);

- ATS_AST_ATRT (Audio Stream Attribute Table of ATS) as shown in detail in FIG. 10 .

As shown in detail in FIG. 9, the ATSM_AST_ATR is composed of 8 bytes (bits b63-b0), and as attributes of the encoded audio signal recorded in the disc, the following data (1)-( 4) (Other bits are reserved).

(1) Audio coding method (3 bits b63~b61)

000b: Dolby-AC-3

010b: MPEG-1 or MPEG-2 (no extended bitstream)

011b: MPEG-2 (with extended bitstream)

100b: Linear PCM audio

101b: Linear PCM audio (including 2ch+5ch, 2ch+6ch, 2ch+8ch)

(2) Quantization/DRC (Dynamic Range Control) information (2 bits b5, b54)

・If the audio coding method is "000b", it is "11b"

・If the audio encoding method is "010b" or "011b", it is:

00b: No dynamic range control data is present in the MPEG audio stream

01b: Dynamic range control data is present in the MPEG audio stream

10b, 11b: Reserved

・In the case of "100b" or "101b", the audio coding method corresponds to stereo 2ch:

00b: 16 bits

01b: 20 bits

10b: 24 bits

11b: reserved

(3) Sampling frequency fs (2 bits b53, b52), corresponding to stereo 2ch, is:

00b: 48kHz

01b: 96kHz

10b: 192kHz

(4) Number of channels (3 bits b50~b48)

000b: 1ch (mono)

001b: 2ch (two-channel)

010b: 3ch

011b: 4ch

100b: (Stereo 2ch+5ch)

101b: (Stereo 2ch+6ch)

110b: 7ch

111b: (Stereo 2ch+8ch)

As shown in detail in FIG. 11, the ATS_AST_ATRT (Audio Stream Attribute Table of ATS) shown in FIG. 10 has an ATS_AST_ATR for each audio stream #1 to #7, each ATR is composed of 8 bits (64 bytes in total).

As shown in FIG. 11, the ATS_AST_ATR of one audio stream is composed of the same 8 bits (bits b63 to b0) as the audio title set menu audio stream attribute data (ATSM_AST_ATR), except The above attribute data (1) to (4), and the following data:

(5) Multi-channel extension (1 bit b60)

(6) Audio type (2 bits b59, b58)

(7) Audio application mode (2 bits b57, b56)

(8) Extraction information of its stream (AST) (2 bits b47, b46)

(9) LFE (Low Frequency Effect, low frequency sound effect) 1ch extraction information (2 bits b45, b44).

And, in the (7) audio application mode of the DVD player, record:

11b: 2ch+sound mode

Furthermore, in (8) the extraction information of its stream and (9) the extraction information of LFE1ch, it is recorded as band information:

00b: Full (1/1)

10b: Half (1/2)

11b: One quarter (1/4).

However, the number of (4) channels in the ATSM_AST_ATR must be 2ch in the audio stream #0, and the audio stream #1 includes the preceding 3ch. That is, for example, in the case of recording the audio signal of one title with 2+6ch, the two-channel signal of 2ch is assigned to audio stream #0, the front signal of 3ch within 6ch is allocated to audio stream #1, and the audio stream # 2 distributes back signal and LFE1ch signal of 2ch. Moreover, "3" is recorded in both the audio manager information-manager table (AMGI-MAT) shown in FIG. 4 and the audio title set information-manager table (ATSI-MAT) shown in FIG. Use data of #0 to #2.

Furthermore, the 2+6ch analog audio signal is sampled with the following sampling frequency fs, quantized and recorded with the following quantization bits:

Dual channel 2ch: 48kHz, 20 bits

Front 3ch: 96kHz, 16 bit

Rear 2ch, LFE1ch: 48kHz, 16 bit (not decimate)

In this case, in the audio title set menu·audio stream·attribute data (ATSM_AST_ATR) shown in Figure 9, record as the attribute of two-channel 2ch:

(1) Audio encoding method

101b: Linear PCM audio (including 2+5ch, 2+6ch, 2+8ch)

(2) Quantization/DRC

01b: 20 bits

(3) Sampling frequency fs

00b: 48kHz

(4) Number of channels

101b: (Stereo 2ch+6ch)

Also, recorded in ATS_AST_ATR of audio stream #0:

(1) Audio encoding method

101b: Linear PCM audio (including 2ch+5ch, 2ch+6ch, 2ch+8ch)

(2) Quantization/DRC

01b: 20 bits

(3) Sampling frequency fs

00b: 48kHz

(4) Number of channels

001b: 2ch (stereo)

(7) Audio application method

11b: 2ch+sound mode

(8) Extraction information of the stream

00b: All (1/1)

(9) LFE1ch extraction information

00b: All (1/1).

Also, recorded in ATS_AST_ATR of audio stream #1:

(1) Audio encoding method

101b: Linear PCM audio (including 2ch+5ch, 2ch+6ch, 2ch+8ch)

(2) Quantization/DRC

01b: 16 bits

(3) Sampling frequency fs

00b: 96kHz

(4) Number of channels

001b: 3ch

(7) Audio application method

11b: 2ch+sound mode

(8) Extraction information of the stream

00b: All (1/1)

(9) LFE1ch extraction information

00b: All (1/1).

Also, recorded in ATS_AST_ATR of audio stream #2:

(1) Audio encoding method

101b: Linear PCM audio (including 2ch+5ch, 2ch+6ch, 2ch+8ch)

(2) Quantization/DRC

01b: 16 bits

(3) Sampling frequency fs

00b: 48kHz

(4) Number of channels

001b: 3ch

(7) Audio application method

11b: 2ch+sound mode

(8) Extraction information of the stream

00b: All (1/1)

(9) LFE1ch extraction information

00b: All (1/1).

The A packet and its control packet recorded in the audio stream will be described below. As shown in Figure 12, the VCB unit is composed of any number of packets from 0.4 to 1.0 seconds, and the ACB unit is composed of any number of packets from 0.5 to 1.0 seconds. The A-CONT packet in the ACB unit of the DVD disc is configured In the third package of the DVD video disc.

A-CONT packs are basically arranged in units of 0.5 seconds of audio time, and indexed notches are arranged so as to end in a range of 0.5 to 1.0 seconds. Moreover, the audio time (GOF: Group of Audio Frame unit) is represented by the A-CONT packet, and the data position is determined by the audio frame number and the first access unit pointer and the number of frame headers. The A packet before the A-CONT packet is not mandatory to be filled with 0.5 second unit of video data.

Adjacent A packages are configured so that audio signals are related to each other. For example, in the case of two-channel, L-channel packages and R-channel packages are arranged adjacently. Moreover, even in 5/6/8-channel multi-audio In the case of lanes, the adjacent arrangement is similarly performed. The V pack is arranged adjacent to the A pack when an image is displayed when an audio signal is reproduced. As shown in Figure 13, A package and V package add 4 bytes of packet start information and 6 bytes of SCR (System Clock Reference: system time) to 2034 bytes of user data (A data, V data). Reference value) information, 3-byte Mux rate information, and 1-byte padding of a total of 14 bytes of packet header (1 packet = 2048 bytes in total). In this case, the time of A packets in the same header can be managed by making the SCR information as a time stamp "1" in the first packet in the ACB unit and continuous in the same header.

Correspondingly, as shown in Figure 14, the A-CONT packet consists of a 14-byte packet header, a 24-byte system header, a 1003-byte ACD (Audio Character Display) component, and a 1007-byte ASD ( Audio retrieval data) components. Furthermore, the ACD pack is composed of a pack header of 6 bytes, a substream ID of 1 byte, ACD (Audio Character Display) information of 636 bytes shown in detail in FIG. 15(A), and a reserved area of 360 bytes. The ASD pack is also composed of a pack header of 6 bytes, a substream ID of 1 byte, and ASD (Audio Search Data) of 1000 bytes as shown in detail in FIG. 17 .

As shown in detail in Figure 15 (A), the 636-byte ACD information area has a 48-byte general information area, 294 bytes of each first language character "1" and second language character "2". Each area is composed of a name space area of 93 bytes, two free space areas of 93 bytes each, and a data pointer area of 15 bytes. In the name space area of one of the first language character "1" and the second language character "2", as shown in FIG. The region is configured for data expressed in English. The presentation language can be determined by the disc distributor.

The 48-byte general information consists of, for example, 16-byte service level information, 12-byte language code information, 6-byte text setting code information, 6-byte display item information, 2-byte "and the previous ACD The information is different" information and 6-byte reserved information. The 16-byte service level information represents display size, display type, distinction of audio/video/SP, stream, etc., and text is legal (mandatory), and bitmap is optional (arbitrary). The 12-byte language code and the video file use 2 bytes to represent the language of characters "1" and "2" respectively, representing up to 8 languages in one file. English is mandatory.

The 6-byte character setting code information can have a maximum of 15 character codes corresponding to the language codes, and the presence or absence and the type of the language of the characters "1" and "2" are indicated in 1 byte. An example of code is as follows:

1.ISO646

2. ISO8859-1

3. MS—JIS

The 6-byte display item information indicates the free space "1" and "2" shown in FIG. 15, the presence or absence of data pointers, and ID. The name space is statutory, and the title name, music name, and artist name must be recorded.

1000-byte ASD (Audio Search Data), as shown in detail in FIG. 17(A), consists of 16-byte general information, 8-byte current number (No.) information, 16-byte current time information, 8-byte title group search information, 8-byte title search information, 404-byte track search information, 408-byte index search information, 80-byte highlight scene search information, and 52-byte reserved area .

The 8-byte current number information consists of the current title number of the title group (2 bytes: BCD), the current track number of the title group (2 bytes: BCD), the current search number of the track (2 bytes: BCD) and reserved area (2 bytes). The 16-byte current time information consists of the playback time of the track (4 bytes: BCD), the remaining playback time of the track (4 bytes: BCD), the absolute time of the title (4 bytes: BCD), and the remaining absolute time of the title. Composed of time (4 bytes: BCD).

The 8-byte title set search information is composed of the first section number (4 bytes) of the title set and the last section number (4 bytes) of the title set. The 8-byte title search information is composed of the first section number (4 bytes) of the title and the last section number (4 bytes) of the title. The 404-byte track search information consists of the track and session number of the title (4 bytes x 99), the first session number of the title (4 bytes), and the last session number of the title (4 bytes). .

The 408-byte index search information consists of the title index and section number (4 bytes x 100), the first section number of the title (4 bytes), and the last section number of the title (4 bytes). . The 8-byte highlight search information is composed of a track inner session number (4 bytes x 10) and a track outer session number (4 bytes x 10).

According to such a format, the A-CONT pack for managing the audio signal of the subsequent A pack is arranged at the beginning of a plurality of A packs like the TOC information of a CD. Therefore, the audio data is not integrated with the video data, etc. , and the recording capacity can be increased. Furthermore, the audio time can be managed by the A-CONT packet, and simple text information such as the song title related to the audio data can be extracted by the A-CONT packet.

TOC information such as title, start address, and performance time are placed in the A-CONT packet, so even during audio playback, information corresponding to the user's operation can be extracted from the A-CONT packet and playback can be started. Furthermore, by arranging TOC information in the audio manager information (AMGI) and audio title set information (ATSI), the necessary TOC information can be stored in the memory in the playback device, and can be taken out and used immediately from the memory. information corresponding to the operator's operation to start playback. Since there is no need to store large-capacity information such as program chain information (PGCI) in a DVD video disc, it is possible to efficiently manage the disc.

1. When there is no image (V) data in the directory,

(1) Search and random access corresponding to three levels of title, music, and index can be realized.

(2) Heading, time search, and random access in units of GOF (audio frame) can be realized.

(3) The time of title, music and index can be managed in real time.

2. When there is image (V) data in the directory,

Related to audio data, in addition to the above (1) to (3),

(4) It is also possible to display and manage the title, the current time during music playback, and the remaining time in real time.

related to the video data,

(1) Search and random access corresponding to the three levels of title, PTT, and unit can be realized.

(2) The head, time search, and random access of video frame units can be realized.

(3) It can manage title, PTT and unit time in real time.

(4) The current time and remaining time during PTT or title playback can be displayed and managed in units of video frames.

The ACBU in FIG. 1(b) includes A-CONT packs and CONT packs. As shown in FIG. 18, it may be configured without A-CONT packs and CONT packs. In this case, the video signal is not recorded, but the recording capacity of the video signal increases proportionally, the size of the disk can be reduced, and the playback function can be simplified. Therefore, a playback device suitable for portability can be provided.

Modifications of the ACD (Audio Character Display) information shown in FIG. 15(A) and the ASD (Audio Search Data) information shown in FIG. 17(A) will be described below.

FIG. 15(B) and FIG. 17(B) respectively show a first modified example, and FIG. 15(C) and FIG. 17(C) respectively show a second modified example. The 676-byte ACD information area in the first modified example, as shown in detail in FIG. area, a 16-byte display control data area, and a 24-byte reserved area. Each information area of characters "1" and "2" is composed of a 93-byte name space area, two free space areas of 93 bytes each, and a data pointer area of 15 bytes. In order to display a music title as shown in FIG. 16, 31-byte 1/4-byte header character data and 62-byte full-byte and half-byte text data are arranged in the name space area. In the 16-byte display time data area, an 8-byte configuration A packet address (timing time) is used as the text display start time and end time.

The 48-byte general information consists of, for example, 16-byte service level information, 12-byte language code information, 6-byte text setting code information, 6-byte display item information, 2-byte "and the previous ACD The information is different" information and 6-byte reserved information. The 16-byte service level information represents display size, display type, distinction of audio/video/SP, stream, etc., and text is legal (mandatory), and bitmap is optional (arbitrary). The 6-byte character setting code information expresses the languages of the characters "1" and "2" in 2 bytes, as in the video file, and represents a maximum of 8 languages in one file. English is mandatory.

The 1000-byte ASD (Audio Search Data) as the first modified example is composed of 16-byte general information, 8-byte current number information, and 16-byte current time information, as shown in detail in FIG. 17(B). , 8-byte title group search information, 8-byte title search information, 404-byte track search information, 408-byte index search information, 80-byte highlight scene search information, 52-byte reserved area information constitute.

Text display time data may be recorded in the ASD area instead of being recorded in the ACD area. That is, as the second modified example, as shown in Figure 15 (C), the 16-byte character control data in the ACD area is used as a reserved area, and the 40-byte area is all used as a reserved area, and it can also be used as shown in Figure 17 As shown in (C), 16 bytes of the 52-byte reserved area of the ASD area are used as character display time data, and the remaining 36 bytes are used as reserved areas.

Next, the reproducing apparatus according to the present invention will be described with reference to FIG. 19 . On the DVD-Video 1, the data structure described above is EFM-modulated and recorded in bits. When the operation section 18 and the remote controller 19 are used for track selection, playback, fast forward, and stop operations, the control section 23 controls the driver device 2 and the playback device 17 according to its operation. To read the bit data recorded in the DVD video disc 1, and then perform EFM demodulation.

In the playback device 17, this signal is sent to the CONT packet detection unit 3 and the A-CONT packet detection unit 9. The CONT packet detection unit 3 detects the CONT packets in the reproduced data and sets control parameters for the parameter unit 8, and simultaneously writes the V packets controlled by the CONT packets into the V packet buffer 4 sequentially. The user data (video signal, sub-picture information) written in the V packet in the V packet buffer 4 is fetched in packet order by the buffer fetching unit 5 according to the SCR (refer to FIG. 13 ) in the V packet, and, according to the CONT packet The PTS (Presentation Time Stamp) inside is taken out in order of output time, and then is output as an analog video signal through the image conversion unit 6, D/A conversion unit 7, and video output terminals 15, 15′.

The A-CONT packet detection section 9 detects the A-CONT packet in the playback data, and sets the control parameters in the parameter section 14, and at the same time, writes the A packets controlled by the A-CONT packet into the A packet buffer in sequence device 10. The user data (audio signal) in the A-packet written in the A-packet buffer 10 is taken out in packet order according to the SCR by the buffer fetching unit 11, and the current time of the audio search data (ASD) in the A-CONT packet is (Refer to FIG. 17(A)) are taken out in order of output time, and then output as an analog audio signal through the PCM conversion unit 12, the D/A conversion unit 13, and the audio output terminal 16. The display data in the A-CONT packet (the audio character display information ACD shown in FIG. 15(A) and FIG. 16 ) is sent to the display signal generator 20 to generate a display signal, and the display signal passes through the display signal output terminal 22. output, or output to the built-in character display unit 21.

FIG. 20 is a block diagram functionally showing the configuration shown in FIG. 19 . The replay device 2 corresponds to the driver device 2 shown in FIG. The extraction unit 11 corresponds to the parameter unit 14 , the audio signal output unit ( 12 , 13 ) corresponds to the PCM conversion unit 12 and the D/A conversion unit 13 , and the text information output unit 20 corresponds to the display signal generation unit 20 . The replay signal processing separation device V (3, 4, 5, 8) corresponds to the CONT packet detection part 3, the V packet buffer 4, the buffer fetching part 5 and the parameter part 8, and the video signal output device and the sub-picture information output Means (6, 7) correspond to the image converting section 6 and the D/A converting section 7. The control device 23 corresponds to the control unit 23 .

In Fig. 20, when the control device 23 sends out the command signal for reproducing the target music from the operation part 18 and the remote controller 19, the address control information signal corresponding to the replay command is sent to the reproducing device 2, thereby , to play back the target track from DVD-Video 1. The replay signal processing separation device A separates the replay data, and sends the A-CONT information to the control device 23, sends the audio signal to the audio signal output device (12, 13), and sends the text information to the text information output device 20. The playback signal processing separation device V separates the playback data, sends CONT information to the control device, and sends video signals and sub-picture information to the video signal device and sub-picture information output devices (6, 7) respectively.

Next, the operation of the text information output device 20 and the flat rectangular display 21 for text display will be described in detail with reference to FIG. 20(A). The display time data in the A_CONT packet is separated by the display time decoder 251 into display start time data and display end time data, and the respective data are applied to the start comparator 252 and the end comparator 253 . Then, the character data in the A_CONT packet is converted into dot matrix character data for display by the character data decoder 254 , and the data is stored in the buffer 255 .

Next, the start comparator 252 compares the display start time data with the A packet address in playback, and when they match, sends a dot matrix readout start control signal to the buffer 255, and at the same time, sends a display signal to the display 256 (21'). Turn on the control signal. End comparator 253 compares and displays the A packet address in the end time data and playback, and when consistent, sends a timing signal for outputting the next character time data to display time decoder 251, and simultaneously, to display 256 (21 ') Send a control signal for display shutdown.

FIG. 20(B) shows an apparatus for playing back a disc having V packs and CONT packs but only A-CONT packs as a modified example of the embodiment, omitting the video processing unit. From the A-CONT package of the A package output by the control audio signal output device 12, 13, the ACD information in the previous A-CONT package is read in advance, and stored in the ACD storage unit 14B, and the text information in the ACD information is displayed. On a flat rectangular display 21 ′ as a display device 21 .

On turntables without CONT packets, no synchronization is required.

FIG. 20(C) shows a reproducing apparatus as another modified example of the embodiment. In this reproducing apparatus, additional recording is performed in the lead-in area (TOC area 1a shown in the figure) of the innermost peripheral portion of the disc 1. When playback starts, the TOC detection means 324 independently accesses the TOC area 1a, and records it in the memory constituting the TOC information storage unit 314A. In this configuration, when the audio playback control information for playback with the sound quality recommended by the program mixer is recorded in the ACD module, the sound quality/level control information output device 331 and the sound quality/level control information output device 331 are provided. The processing unit 332 controls the sound quality/level according to the control information.

The time control of the sound quality/level control information can be performed by using the control start time data and the control end time data by blocks having a structure as shown in FIG. 20(A) .

Next, a playback device of a second embodiment using TOC (Table Of Contents) information will be described. As shown in FIG. 21, the TOC shown in detail in FIG. 22 is additionally recorded in the free area of AMGI (Audio Manager Information), and the playback device accesses the TOC information to play the beginning of the music. FIG. 22 shows an example of general TOC information recorded in the lead-in area of a CD, and the same information is repeatedly recorded three times. When recording on the DVD video disc 1 of the present invention, such repetition may or may not be performed.

Wherein, in the TOC information used in CD, when index=00～99, use minute (PMIN), second (PSEC) and frame (PFRAME) to represent the absolute time that each movement represented by this number starts. When pointer=A0, PMIN represents the first movement, which is PSEC=PFRAME=0. When pointer=A1, PMIN represents the last movement, which is PSEC=PFRAME=0. When pointer = A2, minutes (PMIN), seconds (PSEC), and frames (PFRAME) are used to indicate the absolute time at which the lead-out area starts. Therefore, the TOC information shown in FIG. 22 shows the case where 6 music pieces (or 6 movements) are recorded on the DVD video disc 1 (pointers=01 to 06). This TOC information may be recorded in the free area of ATSI (Audio Title Set Information) as shown in FIG. 23, or may be recorded in the reserved area (360 bytes) in the ACD pack of the A-CONT pack shown in FIG. 14. , to replace AMGI.

Next, this TOC information is read when playback starts, and is stored in the TOC information storage unit 14A shown in FIG. 24 and FIG. 25 . to access Disk 1. This TOC information is recorded in AMGI, ATSI, or A-CONT packets, and at the same time, as shown in FIG. , when playback starts, the TOC detection device 24 independently accesses the TOC area 1a, and stores the TOC information in the TOC information storage unit 14A. This TOC information complies with the configuration standard of FIG. 22 and is added with simple playback information such as down-mixing coefficients, and is referred to as SAPP (Simple Audio Play Pointer) to distinguish it from it.

Next, AV synchronous playback processing using playback control information such as TOC information and search information will be described with reference to FIGS. 27 and 28 . In Fig. 27, when the beginning of specified music or movement is played back, refer to the corresponding TOC information (step S1) of this specified position, then, calculate the position of unit (cell) and index (step S1) according to this TOC information (step S1). S2). Then, the position is searched (step S3), and when confirmed, the synchronous playback of the A packet and the V packet shown in detail in FIG. 34 is performed (step S4→S5).

In Fig. 28, replay the CONT packet ((step S11), then replay the A-CONT packet (step S12), then check whether the time information in the CONT packet and the A-CONT packet is the same time (step S13). Under the situation of not being the same moment, both sides of CONT bag and A-CONT bag are adjusted ± 1 bag (step S14), then return to step S11, replay this CONT bag and A-CONT bag.In step S14, It is also possible to replay the packet by adjusting both the CONT packet and the A-CONT packet by ±1 packet.

In step S13, when the time information in the CONT packet and the A-CONT packet is the same moment, replay the A packet controlled by its A-CONT packet, and at the same time, make the A packet address (SCR information) increment by one (step S15), then, the V packet controlled by the CONT packet is played back, and at the same time, the V packet address (SCR information) is incremented by one (step S16). Then, it is checked whether the reproduction of the A packet is completed (step S17), and if it is not completed, it proceeds to step S18, and on the other hand, if it is completed, it proceeds to step S20.

In step S18, it is checked whether the reproduction of the V-pack is completed, and if it is not completed, the process returns to step S13, and on the other hand, if it is completed, the process proceeds to step S19. In step S19, the next V packet controlled by the CONT packet is played back, and at the same time, the address of the V packet is incremented by one, and the process returns to step S13. In step S20, replay the next A bag that is controlled by its A-CONT bag, simultaneously, make A bag address increment one, then, check whether the playback of V bag ends (step S21), when not ending, Returning to step S16, on the other hand, when finished, proceed to step S23.

In step S22, check whether the A package controlled by the A-CONT package is the final package, if not the final package, return to step S16, on the other hand, if it is the final package, return to step S12 , to replay the next A-CONT packet. In step S23, the next V packet controlled by the CONT packet is played back, and at the same time, the V packet address is incremented by one, and then it is checked whether the end of frame (EOF) exists (step S24). When there is no EOF, return to step S13. On the other hand, when there is EOF, this AV synchronous playback process ends. In this way, the audio data A and video data V contained in the pack are reproduced seamlessly and synchronously based on the time management information in the CONT pack and the A_CONT pack.

The fourth embodiment will be described below. Fig. 29 shows the format of the fourth embodiment of the DVD disc according to the present invention, which does not include the VTS shown in Figs. 31 to 33, but only consists of the ATS. This ATS is composed of an audio manager (AMG) shown in FIG. 1(b), an audio management menu (AMGM) for video and audio, and ATS<1> and ATS<2> managed by AMGI in the AMG. As shown in FIG. 30, ATS<1> and ATS<2> do not include A_CONT packs, but are composed of A packs and still picture packs. The still picture packs are not placed in multiples with respect to the A packs, but one pack is placed per track.

Wherein, for reference, FIG. 31 shows the format of a DVD-Van (Video + Audio Pilot) disc, which roughly consists of Video Title Set (VTS) as DVD Video data and ANV as Data Pilot (Pilot) data. The title group (ANV-TS) constitutes. Specifically, VTS has the same structure as the DVD video disc shown in FIG. 1(a) and FIG. ATS<1> and ATS<2> are paired with VTS<1> and VTS<2> on the VTS side and are managed by AMGI in AMG.

The format of the DVD video disc, as shown in Fig. 32 and Fig. 1(a), does not have ATS and ANV-TS, but only consists of VTS.

Fig. 33 shows the format of a DVD-Avd (audio + AV data) disc, which roughly consists of a video title set (VTS) as DVD video data and an audio title set (ATS) as DVD audio data. Specifically, the VTS is composed of a video manager (VMG) shown in FIG. 1(a), a video management menu (VMGM) for video and audio, and a VTS<1> managed by VMGI in the VMG.

On the other hand, the ATS is composed of the audio manager (AMG) shown in FIG. The ATS<1> managed by the AMGI within the AMG and the ATS<2> that is not paired with the VTS side are also managed by the AMGI within the AMG. As shown in FIG. 30, this ATS<2> does not have an A_CONT packet, but consists of an A packet and a still picture packet.

Fig. 34 shows the audio-specific title audio object attribute (AOTT_AOB_ATR) of the disc of the fourth embodiment, which is recorded in the disc as data representing the structure of audio data of the DVD-Avd disc. The attribute data is composed of 8 bytes (64 bits b63~b0). If detailed in order from the MSB side, it consists of the following parts:

・4-bit (b63~b60) audio coding method

1-bit (b59) down-mixing (D-M) method

・3-bit (b58~b56) multi-channel mode

- Number of quantization bits Q1 of channel group 1 of 4 bits (b55 to b52)

- Number of quantization bits Q2 of channel group 2 of 4 bits (b51 to b48)

・Sampling frequency fs1 of channel group 1 of 4 bits (b47 to b44)

・Sampling frequency fs2 of channel group 2 of 4 bits (b43 to b40)

・Reserved area of 3 bits (b43~b40)

5-bit (b36~b32) channel allocation

• The remaining 32 bits (b31 to b0) are reserved areas.

The remaining 32 bits (b31 to b0) are used for attribute data of each channel.

The above data are described in more detail below.

(1) Audio coding method (b63～b60)

0000b: Linear PCM mode

0001b: reserved for compressed audio (Dolby Digital)

0010b: reserved for compressed audio (no MPEG2 extensions)

0011b: Reserved for compressed audio (with MPEG2 extensions)

0100b: reserved for compressed audio (DTS)

0101b: reserved for compressed audio (SDDS)

Other: Reserved for other encoding methods

(2) Down-mixing method (b59)

0b: Downmix binaural output enable

1b: Down-mixing binaural output disabled

(3) Multi-channel mode (b58～b56)

0000b: Type 1

Other: reserved

(4) Quantization bit number Q1 of channel group 1 (b55 to b52)

0000b: 16 bits

0001b: 20 bits

0010b: 24 bits

Other: reserved

(5) Quantization bit number Q2 of channel group 2 (b51 to b48)

・When the number of quantization bits Q of channel group 1 is "0000b", it is "0000b"

・When the number of quantization bits Q of channel group 1 is "0001b", it is "0000b" or "0001b"

・When the number of quantization bits Q of channel group 1 is "0010b", it is "0000b", "0001b", or "0010b"

in,

0000b: 16 bits

0001b: 20 bits

0010b: 24 bits

Other: reserved

(6) Sampling frequency fs1 of channel group 1 (b47~b44)

0000b: 48kHz

0001b: 96kHz

0010b: 192kHz

1000b: 44.1kHz

1001b: 88.2kHz

1010b: 176.4kHz

Other: reserved

(7) Sampling frequency fs2 of channel group 2 (b43~b40)

・When the sampling frequency fs1 of channel group 1 is "0000b", it is "0000b"

・When the sampling frequency fs1 of channel group 1 is "0001b", it is "0000b" or "0001b"

・When the sampling frequency fs1 of channel group 1 is "0010b", it is "0000b", "0001b", or "0010b"

・When the sampling frequency fs1 of channel group 1 is "1000b", it is "1000b"

・When the sampling frequency fs1 of channel group 1 is "1001b", it is "1000b" or "1001b"

・When the sampling frequency fs1 of channel group 1 is "1010b", it is "1000b", "1001b", or "1010b"

The linear PCM method is used in the disc of this fourth embodiment. The dedicated header for linear PCM, as shown in Figure 35, consists of the following parts:

8-bit substream ID

4-bit reserved area

4-bit ISRC number

8-bit ISRC data

8-bit private header length

16-bit first access unit pointer

1-bit audio emphasis flag F1

4-bit audio emphasis flag F2, etc.

Furthermore, the audio emphasis flag F1 is described as "emphasis off" (=0b) when the sampling frequency fs is 96kHz or 88.2kHz, and "emphasis on" (=1b) in other cases. ). The audio emphasis flag F2 is described as "emphasis off" (=0b) when the sampling frequency fs is 192kHz or 176.4kHz, and "emphasis on" (=1b) in other cases.

Next, the playback processing of the playback device of the fourth embodiment will be described with reference to FIGS. 36 to 39. FIG. First, in FIG. 36, it is judged whether the reproduced signal is audio title set (ATS) independent data or has both still image data (step S500), and in the case of independent data, only the reproduction of ATS is performed (step S500). S501); On the other hand, if there are both, playback of ATS and still picture is performed (step S502).

In FIG. 37, first, it is judged whether it is the first sampling frequency that is a multiple of 48 kHz or the second sampling frequency that is a multiple of 44.1 kHz (step S600), and in the case of the first sampling frequency, the frame rate is set to the second sampling frequency. One frame rate (1/600 second) (step S601), on the other hand, in the case of the second sampling frequency, set the frame rate to the second frame rate (1/551.25 second) (step S602). At this time, the determined sampling frequency may be displayed (step S603).

In FIG. 38, first, it is judged whether the sampling frequency fs is 192 kHz (step S700), and if it is 192 kHz, the emphasis filter circuit is turned off (step S703). If it is not 192kHz, it is judged whether the audio emphasis flag is turned on (step S701), if it is turned on, the emphasis circuit is turned on (step S702), on the other hand, if it is not turned on, proceed to Step S703, turn on the emphasis circuit.

In FIG. 39, first, it is judged whether the sampling frequency fs is 176.4 kHz (step S800), and if it is 176.4 kHz, the emphasis filter operation is turned off (step S803). If it is not 176.4kHz, it is judged whether the audio emphasis flag is turned on (step S801), and if it is turned on, the emphasis filter action is turned on (step S802), on the other hand, if it is not turned on , go to step S803, and turn on the emphasis circuit.

In the modified DVD audio playback device shown in Fig. 39(A) and Fig. 39(B), the D packet is processed and displayed by the display signal generating unit 20 and the character display unit 21'.

Fig. 39 (B) has further shown that in the case of recording the audio playback control information, a sound quality/level control information output unit 331 and a sound quality/level control processing unit 332 are set, and the sound quality/level is controlled according to the control information. .

Figure 39 (C) shows the text display circuit for the text of the display format, display time decoder 251, start comparator 252, end comparator 253, text decoder 254, buffer 255 and display 256 (21 ') have and Fig. 20(A) has the same configuration. Among them, the buffer 255 and the display 256, as shown in FIG. 16, can display 15 full-width characters (31 half-width characters)×2.5 lines of characters per line, making them a set. Furthermore, as shown in FIG. 39(D), the V-RAM 459a in the video display processor 459 has a capacity capable of storing 2×8 sets of character information.

The text display device shown in Fig. 39 (C) has the usual mode of displaying a group of text information on the display 256 and displays 2 * 8 groups of text on an external display device not shown in the figure through the external output terminal 15 " The special mode of information, the action of normal mode is roughly the same as Fig. 20 (A).That is, during normal mode, the display time data in the D pack is separated into display start time data and display end time data by display time decoder 251, The data are applied to the start comparator 252 and the end comparator 253. The character data in the D packet is converted into dot matrix character data for display by the character data decoder 254, and the data is stored in the buffer 255 in.

Next, the start comparator 252 compares the display start time data with the A packet address in playback, and when they match, sends a dot matrix readout start control signal to the buffer 255, and at the same time, sends a display connection to the display 256 (21'). through the control signal. End comparator 253 compares and displays the A packet address in the end time data and playback, and when consistent, sends a timing signal for outputting the next character time data to display time decoder 251, and simultaneously, to display 256 (21 ') Send a control signal for display shutdown.

On the other hand, in the special mode, the display time data in the D packet is separated into display start time data and display end time data by the display time decoder 251, and the respective data are applied to the start comparator 252 and the end comparator 253, At the same time, it is applied to the CPU60. The character data in the D packet is converted into dot matrix character data for display by the character data decoder 254 , and the data is stored in the buffer 255 . Furthermore, the display start address (the address corresponding to the display start address of the ACD) and the number of division data in the A_CONT packet are decoded by the collective display control data decoder 58 and supplied to the CPU 60 .

Then, the start comparator 252 compares the display start time data and the A packet address in the playback, and when they match, sends the readout start control signal of the dot matrix to the buffer 255, and the end comparator 253 compares the display end time data with the playback When the address of the A packet in A matches, a timing signal for outputting the next character time data is sent to the display time decoder 251.

CPU 60 checks the display start time data of each group decoded by the display time decoder 251 according to the display start address and the number of division data of each group decoded by the collective display control data decoder 458, and when they match, the video display The V-RAM 459a in the processor 459 specifies a set of write addresses.

Thus, one group of dot matrix data read out from the buffer 255, for the V-RAM459a in the video display processor 459, is written on the specified address by the CPU 60 according to the display start address and the division quantity data, The following steps are performed in the same manner, and the dot matrix data of 16 groups are written into the V-RAM 459a. The video display processor 459 develops the 16 sets of dot matrix data into a video signal of one screen, and the video signal is output to an external display device (not shown) through the external output terminal 15".

40 and 41 show encoding devices. FIG. 40 is a block diagram showing an embodiment of an audio signal coding apparatus according to the present invention, and FIG. 41 is a block diagram showing details of the signal processing circuit in FIG. 40 .

In FIG. 40, the analog audio signal A is sampled by the A/D converter 31 at a sufficiently high sampling frequency (sampling period Δt), for example, 192 kHz, and converted into a high-resolution PCM signal of, for example, 24 bits. is the data string corresponding to the high-resolution curve α:

xb1, x1, xa1, x2, xb2, x3, xa2,

..., xbi, x2i—1, xai, x2i, ....

This data string (xbi, x2i-1, xai, x2i) is encoded by the signal processing circuit 32 and the memory 33 shown in detail in FIG.

The configuration of the signal processing circuit 32 will be described in detail with reference to FIG. 41 . First, the band-limited low-pass filter 36 such as an FIR filter is used to obtain the band-limited low The data string corresponding to the resolution curve β:

xc1, *, *, *, xc2, *, *, *, xc3, *, *, *, ... xci, *, *, *, ...,

Next, in this data string, the data "*" is extracted by the extraction circuit 37, thereby generating a data string:

xc1, xc2, xc3, ..., xci, ...

Among them, the data string xci is a data string in which the sampling frequency is reduced to 1/4 by limiting the channel of the digital data A/D converted by the A/D converter 31 .

In the data string (xbi, x2i-1, xai, x2i), the data xi is extracted by the extraction circuit 38, thereby generating the data string:

xb1, xa1, xb2, xa2, ..., xbi, xai, ....

Then, according to these data strings xci, xbi, xai, the difference is calculated by the adder 39 as a difference calculator:

xbi-xci=Δ1i

xai-xci=Δ2i.

Wherein, the differential data Δ1i, Δ2i are, for example, 24 bits or less, and the number of bits may be fixed or variable.

Distribution circuit 40 packs data string xci and differential data Δ1i, Δ2i into user data (see FIG. 13 ) (1 pack = 2034 bytes), and outputs the user data to DVD formatter 34 .

The video signal V is converted into a digital signal by the A/D converter 31, and then, the digital video signal is encoded into an MPEG format by the V encoder 32V, and then, is packed into user data shown in FIG. 13 and applied to a DVD formatter. Section 34. The DVD formatting unit 34 packs the data into a format as shown in FIGS. 1 to 18 . The data formatted by the DVD formatter 34 is modulated by a modulation method corresponding to the disc by the modulation circuit 35, and a disc is manufactured based on the modulated data.

Next, the DVD player of the fifth embodiment will be described with reference to FIGS. 42 to 82 . First, as shown in FIG. 42(A), the data structure of this fifth embodiment roughly has an AMG (Audio Manager), an SPS (Still Picture Set) shown in detail in FIG. 49, and a plurality of ATSs (Audio Title Sets). .

ATS consists of the following parts in order from the beginning:

ATSI (ATS information);

- Audio Object Set (AOTT-AOBS) for Audio-Specific Titles shown in detail in FIGS. 43 to 48;

• ATSI for backup.

ATSI consists of the following parts in order from the beginning:

· ATSI-MAT (ATSI·Manager Table) shown in detail in Fig. 50 to Fig. 55;

· ATS_PGCIT (ATS program chain information table) shown in detail in Fig. 56 to Fig. 68 .

As shown in detail in FIG. 43, the AOTT_AOBS is composed of a plurality of audio objects for audio-only titles (AOTT_AOB). The AOTT-AOB is composed of a plurality of programs (PG), and each program is composed of a plurality of audio units (ATS-C).

The AOTT-AOB is composed of two types of AOTT-AOBs including only audio data and those including audio data and real-time information data (RTI data). More than one kind of AOTT-AOB is arranged in one disk and one song.

Each program of the first AOTT-AOB containing only audio data is constituted by a plurality of audio units (ATS-C) constituted only by a plurality of audio packs.

Each program of the second AOTT-AOB including audio data and RTI data is constituted by a plurality of audio units (ATS-C). composed of audio packets at the location.

The A packet of the linear PCM is composed of 2048 bytes or less, and its details are composed of a 14-byte packet header and an A component as shown in FIG. 44 . The A pack is composed of a pack header of 17, 9 or 14 bytes, a dedicated header shown in detail in FIG. 45, and audio data (linear PCM) of 1 to 2011 bytes.

As shown in Figure 45, the private header consists of the following parts:

8-bit substream ID

3-bit reserved area

5-bit UPC/EAN—ISRC (Universal Product Code/European Article Number-International Standard Recording Code) number

8-bit UPC/EAN-ISRC data

8-bit dedicated header length

16-bit first access unit pointer

8-bit audio data information (ADI)

· 0 to 8 bits of stuffing bytes.

ADI consists of the following parts:

1-bit audio emphasis flag

・1 bit reserved area

1-bit down-mixing method

1-bit down-mixing code validity

4-bit down-mixing code

· Quantization word length "1" of group "1" of 4 bits

· Quantization word length "2" of group "2" of 4 bits

・Audio sampling frequency fs1 of group "1" of 4 bits

・Audio sampling frequency fs2 of group "2" of 4 bits

4-bit reserved area

4-bit multi-channel type

- 3-bit bit shift data of channel group "2" (see FIG. 47 )

5-bit channel allocation information (see FIG. 53 )

8-bit dynamic range control information

• A reserved area of 8x2 bits.

As shown in FIG. 46, in the 8-bit UPC/EAN-ISRC data area, data that differs according to the UPC/EAN-ISRC number is arranged. Right now,

(1) In the case of UPC/EAN-ISRC number = 1

The first 2 bits b7, b6: reserved

The last 6 bits b5~b0: country code (ISRC#1)

(2) In the case of UPC/EAN-ISRC number = 2

The first 2 bits b7, b6: reserved

The last 6 bits b5~b0: country code (ISRC#2)

(3) In the case of UPC/EAN-ISRC number = 3

The first 2 bits b7, b6: reserved

Last 6 bits b5~b0: copyright owner code (ISRC#3)

(4) In the case of UPC/EAN-ISRC number = 4

The first 2 bits b7, b6: reserved

Last 6 bits b5~b0: copyright owner code (ISRC#4)

(5) In the case of UPC/EAN-ISRC number = 5

The first 2 bits b7, b6: reserved

Last 6 bits b5~b0: copyright owner code (ISRC#5)

(6) In the case of UPC/EAN-ISRC number = 6

The first 4 bits b7~b4: reserved

Last 4 bits b3~b0: recording year (ISRC#6)

(7) In the case of UPC/EAN-ISRC number = 7

The first 4 bits b7~b4: reserved

Last 4 bits b3~b0: recording year (ISRC#7)

In order to improve the S/N ratio and reduce bits, the bits of the data of each channel of the arrangement group "2" are reduced in the area of the linear PCM data which is actual data in the A packet. Figure 47(a) shows PCM data of 6 channels (group "1"=Ch1~Ch3, group "2"=Ch4~Ch6) as an example, the level range is MAX=0dB~MIN=-144dB (24 bit), the value of each channel Ch is as follows:

L _max2 >L _max1 ＝L _max3 >L _max4 >L _max5 >L _max6

The word lengths of Ch1~Ch3 of group "1" are as they are. In this example, the value of Ch2 is the largest. Therefore, each level of Ch4~Ch6 of group "2" is moved up by (0—L _max2 )dB, and 0 to 4 bytes on the LSB side are reduced. In the example shown in FIG. 47 , each level of Ch4 to Ch6 is shifted up to the maximum number of bits = 4, and reduced to 20 bits.

The configuration of the RTI packet will be described in detail below with reference to FIG. 48 . The packet is composed of a 4-byte packet header and an RTI component, and the RTI component is composed of a 17- or 14-byte component header, a dedicated header, and 1 to 2015 bytes of RTI data. RTI data is text information and playback control information associated with audio data.

The private header of the RTI component consists of the following parts:

1-bit substream ID

2-bit UPC/EAN—ISRC number and data (in the figure, they are simply referred to as ISRC)

1-bit dedicated header length

1-bit RTI information ID

· 0 to 7 bits of stuffing byte.

The above-mentioned UPC/EAN-ISRC number and data are UPC/EAN-ISRC number and data related to the copyright of the still picture contained in the SPCT package.

As shown in FIG. 49(A), an SPS (Still Picture Group) has SP address information (SPAI) and a plurality of SPUs (Still Picture Units) #1 to #n, and each of the SPUs #1 to #n has a plurality of SP #1 to #n, and each of the plurality of SP#1 to #n has a plurality of SPCT (still picture) packets. As shown in detail in FIG. 49(B), the SPCT packet is composed of a 14-byte packet header and an SPCT element. The SPCT component consists of a component header of 22 or 19 or 9 bytes and SPCT data below 2015 bytes. Among them, one still picture is compressed by MPEG1 or MPEG2, is composed of an I picture and an intra-coded picture, is divided into one picture unit, and is arranged as SPCT data of an SPCT packet.

The UPC/EAN-ISRC number and data related to the copyright of the still picture can be contained in the packet header in the SPCT packet as described in the RTI packet.

As shown in detail in Figure 50, the ATSI-MAT shown in Figure 42(A) is composed of 2048 bytes (relative byte positions RBP0-2047), which are as follows from the beginning:

AST identifier (ATS-ID) of 12 bytes (RBP0~11);

4-byte (RBP12~15) AST end address (ATS-EA);

12 bytes (RBP16~27) reserved area;

4-byte (RBP28~31) ASTI end address (ATSI-EA);

2-byte (RBP32~33) version number (VERN);

94 bytes (RBP34~127) reserved area;

4-byte (RBP128~131) end address of ASTI-MAT;

60 bytes (RBP132~191) reserved area;

4 bytes (RBP192~195) start address of VTS for AOTT;

4 bytes (RBP196~199) of the start address of AOBS for AOTT or the start address of VOBS for AOTT;

4-byte reserved area (RBP200-203);

The start address of ATS-PGCIT of 4 bytes (RBP204～207);

48 bytes (RBP208~255) reserved area;

128 (16×8) bytes (RBP256-383) AOB attribute (AOTT-AOB-ATR) for AOTT or attribute of VOB audio stream (AOTT-VOB-AST-ATR) for AOTT;

288 (18×8) bytes (RBP384~671) coefficients for down-mixing multi-channel audio data into 2 channels (ATS-DM-COEFT#0~#15)

32 bytes (RBP672～703) reserved area;

Attributes (AOTT_SPCT_ATR) of still picture data in AOBS for AOTT of 2 bytes (RBP704~705);

- Reserved area of 1342 bytes (RBP706 to 2047).

When the ATS has an AOBS for AOTT, AOTT_AOB_ATR shown in detail in FIG. 51 is described in an area of 128 (16×8) bytes (RBP256 to 383). The AOTT-AOB-ATR (b127~b0) consists of the following parts sequentially from the MSB side:

8-bit (b127~b120) audio coding method

・A reserved area of 8 bits (b119 to b112)

Quantization bit number Q1 of channel group 1 of 4 bits (b111 to b108)

- Number of quantization bits Q2 of channel group 2 of 4 bits (b107 to b104)

・Sampling frequency fs1 of channel group 1 of 4 bits (b103 to b100)

・Sampling frequency fs2 of channel group 2 of 4 bits (b99 to b96)

・Type of multi-channel structure of 3 bits (b95~b93)

5-bit (b92~b88) channel allocation

- A reserved area of 8 bits×11 (b87 to b0).

On the other hand, when the ATS has no AOBS for AOTT, AOTT_VOB_AST_ATR shown in detail in FIG. 52 is described. The AOTT-VOB-AST-ATR (b127~b0) consists of the following parts sequentially from the MSB side:

8-bit (b127~b120) audio coding method

・A reserved area of 8 bits (b119 to b112)

・ Quantization bit number Q of 4 bits (b111 to b108)

・Reserved area of 4 bits (b107 to b104)

・Sampling frequency fs of 4 bits (b103 to b100)

・Reserved area of 4 bits (b99~b96)

・Type of multi-channel structure of 3 bits (b95~b93)

5-bit (b92~b88) channel allocation

3-bit (b87~b85) number of decoded audio streams

・5 bits (b84~b80) reserved area

2-bit (b79, b78) DRC for MPEG audio

・Reserved area of 2 bits (b77, b76)

4-bit (b75~b72) compressed channels

- Reserved area of 8 bits x 9 (b71 to b0).

The above data are shown in detail below. However, since the number of quantization bits, sampling frequency, and multi-channel type are the same as those in FIG. 34 , description thereof will be omitted.

(1) Audio coding method (b63～b60)

00000000b: Linear PCM mode

00000001b: reserved for compressed audio (Dolby Digital)

00000010b: reserved for compressed audio (no MPEG2 extensions)

00000011b: Reserved for compressed audio (with MPEG2 extensions)

00000100b: reserved for compressed audio (DTS)

00000101b: reserved for compressed audio (SDDS)

Other: Reserved for other encoding methods

(8) Channel allocation (b92～b88)

Fig. 53 shows channel allocation information of groups "1" and "2" from 1 channel (monaural) to 6 channels. The reference numerals shown in the drawings are explained below.

C(mono) : Mono

L, R : two-channel stereo

Lf : multi-channel left front

Rf : multi-channel right front

C : Center of multi-channel

LFE : Multi-channel Low Frequency Effect

S : Multi-channel surround sound

Ls : Multi-channel left surround sound

Rs : multi-channel right surround sound

(9) "0" or "1" of the number of decoded audio streams (b87~b85)

(10) DRC for MPEG audio (b79, b78)

00b: DRC data does not exist within the MPEG audio stream

01b: There is DRC data in the MPEG audio stream

(11) Number of compressed channels (b75~b72)

The audio coding method is "1111b" in the case of linear PCM audio

0000b: 1ch (mono)

0001b: 2ch (two-channel)

0010b: 3ch

0011b: 4ch

0100b: 5ch

0101b: 6ch

0110b: 7ch

0111b: 8ch

Other: reserved

In order to down-mix multi-channel audio data into two channels, as shown in FIG. 54, 18 words are used in the area of 288 (18×16) bytes (RBP384～671) shown in FIG. 50 Each down-mixing coefficient (ATS-DM-COEFT#0-#15) of table number "0"-"15" is described in section

In order to describe the attributes (AOTT_SPCT_ATR) of the still picture data in the AOBS for AOTT, the area of 2 bytes (RBP704, 705) shown in FIG. constitute:

2-bit (b15, b14) video compression method

2-bit (b13, b12) TV standard

Aspect ratio of 2 bits (b11, b10)

2-bit (b9, b8) display mode

· Reserved area of 2 bits (b7, b6)

3-bit (b5~b3) source image resolution

- Reserved area of 3 bits (b2 to b0).

The contents of the above-mentioned AST_SPCT_ATR are shown in detail below.

(1) Video compression method (b15, b14)

00b: Corresponds to MPEG1

01b: Corresponds to MPEG2

Other: reserved

(2) TV system (b13, b12)

00b:525/60

01b: 625/60

Other: reserved

(3) Aspect ratio (b11, b10)

00b:4:3

01b:16:9

Other: reserved

(4) Display mode (b9, b8)

00b: reserved

01b: reserved

10b: Mailbox only

11b: No description

(5) Resolution of the source image (b5～b3)

000b: 720×480 (525/60 format)

720×576 (625/60 format)

Other: reserved

ATS-PGCIT (ATS program chain information table) shown in Fig. 42 (A) is made up of following parts sequentially from the beginning as shown in Fig. 56 in detail:

· Audio Title Set PGCI Table Information (ATS_PGCITI) shown in detail in FIG. 57

n audio title group PGCI search pointers (ATS_PGCI_ARP#1~#n) shown in detail in Fig. 58 and Fig. 59

• A plurality of audio title groups PGCI shown in detail in FIG. 60 .

ATS-PGCITI consists of 8 bytes as shown in detail in Figure 57, and consists of the following parts in order from the beginning:

的数· 2 bytes

number of

・2-byte reserved area

• 4 bytes of ATS—the end address of the PGCIT.

ATS_PGCI_SRP#1~#n are each composed of 8 bytes as shown in detail in Figure 58, and are composed of the following parts in order from the beginning:

· As shown in detail in FIG. 59, the カテゴリ-(ATS-PGC-CAT) of the 4-byte ATS-PGC

• 4 bytes of ATS—the end address of the PGCI.

The category of the ATS-PGC of the above-mentioned 4 bits (b31-b0) is composed of the following parts sequentially from the beginning as shown in Fig. 59 in detail:

1-byte (b31) entry type

ATS audio title number (ATS-TTN) of 7 bytes (b30~b24)

2-byte (b23, b22) block format

2-byte (b21, b20) block type

・The number of channels in 4 bytes (b19~b16)

・Audio coding method of 8 bytes (b15~b8)

8-byte (b7 to b0) reserved area.

The contents of the above-mentioned Catagoli-(ATS-PGC-CAT) are shown in detail below.

(1) Entry type (b31)

0b: no entry PGC

1b: Entry PGC

(2) Number of ATS audio titles (b30～b24)

Describe the number of ATS audio titles in the range of "1" to "99"

(3) Block method (b23, b22)

00b: ATS-PGC without ATS-PGC block

01b: Initial ATS-PGC of the ATS-PGC block

10b: reserved

11b: The last ATS-PGC of the ATS-PGC block

(4) Block type (b21, b20)

00b: no part of the block

01b: Only the differential block of the recording method

10b: Channel-only differential block

11b: Block of difference between recording mode and channel

(5) Number of channels (b19～b16)

0000b: Below two channels

0001b: More than two channels

The audio title set PGCI (ATS_PGCI) shown in FIG. 56 is composed of the following parts sequentially from the beginning as shown in detail in FIG. 60 :

· ATS-PGC general information (ATS-PGC-GI) shown in detail in Figure 61 and Figure 62

· The ATS program information table (ATS-PGIT) shown in detail in Fig. 55 to Fig. 57

· The ATS unit playback information table (ATS_C_PBIT) shown in detail in Fig. 58 to Fig. 60 .

ATS-PGC-GI consists of 16 bytes (RBP0-15) as shown in detail in Figure 61, and consists of the following parts in order from the beginning:

ATS-PGC directory (ATS-PGC-CNT) of 4 bytes (RBP0~3) shown in detail in Figure 62

4 bytes (RBP4~7) of ATS-PGC play time (ATS-PGC-PB-TM)

· Reserved area of 2 bytes (RBP8, 9)

2 bytes (RBP10, 11) ATS-PGIT start address

The start address of ATS-C-PBIT of 2 bytes (RBP12, 13)

• A reserved area of 2 bytes (RBP14, 15).

The ATS-PGC directory of the above-mentioned 4 bytes (RBP0～3) is composed of the following parts sequentially from the beginning as shown in detail in Figure 62:

・Reserved area of 17 bits (b31~b15)

・Program number of 7 bits (b14 to b8)

• The number of cells of 8 bits (b7 to b0).

The number of programs is in the range of "1" to "99", and the number of units is in the range of "1" to "255".

The ATS program information table (ATS_PGIT) shown in FIG. 60 is composed of n pieces of ATS program information (ATS_PGI) #1 to #n as shown in detail in FIG. 63 . ATS-PGI#1~#n are composed of 20 bytes (RBP0~19) as shown in detail in Fig. 64, and are composed of the following parts sequentially from the beginning:

ATS-PGC directory (ATS-PGC-CNT) of bytes (RBP0~3)

1 byte (RBP4) entry unit number of ATS-PG

・1 byte (RBP5) reserved area

4 bytes (RBP6~9) of the first audio unit of the ATS-PG start showing time (FAC-S-PTM)

4 bytes (RBP10~13) ATS-PG play time

· ATS-PG pause time of 4 bytes (RBP14~17)

・Reserved area of 1 byte (RBP18) (for copyright management data CMI)

• Reserved area of 1 byte (RBP19).

The above-mentioned 32-bit (b31～0) ATS-PG directory is composed of the following parts from the beginning as shown in detail in Figure 65:

・Relationship (R/A) between last time and this time PG of 1 bit (b31)

1-bit (b30) STC discontinuity flag (STC-F)

3-bit (b29 to b27) attribute number (ATRN)

・Bit shift data of channel group (ChGr) "2" of 3 bits (b26 to b24)

· Reserved area of 2 bits (b23, b22)

・1 bit (b21) down-mixing method (D—M)

・Validity of 1-bit (b20) down-mixing coefficient (illustration*)

4-bit (b19~b16) down-mixing coefficient table number (DM-COEFTN)

- RTI flags F15 to F0 of 16 bits (b15 to b0) in total, 1 bit each.

The ATS unit broadcast information table (ATS_C_PBIT) shown in FIG. 60 is composed of n pieces of ATS unit broadcast information (ATS_C_PBI) #1 to #n as shown in detail in FIG. 66 . ATS-C-PBI #1~#n are composed of 12 bytes (RBP0~11) as shown in detail in Figure 67, and are composed of the following parts in order from the beginning:

1 byte (RBP0) ATS-C index number

ATS-C type (ATS-C-TY) of 1 byte (RBP1) shown in detail in Figure 65

・Reserved area of 2 bytes (RBP2, 3)

The start address of ATS-C in 4 bytes (RBP4~7)

· The end address of ATS-C of 4 bytes (RBP8~11).

The ATS-C type of 1 byte (b7～b0) is composed of the following parts sequentially from the beginning as shown in detail in Figure 68:

2-bit (b7, b6) ATS unit element (ATS-C-COMP)

· Reserved area of 2 bits (b5, b4)

- ATS unit usage (ATS_C_Usage) of 4 bits (b3 to b0).

The contents of the above-mentioned data are shown in detail below.

(1) ATS unit elements (b7, b6)

00b: Audio unit consisting of audio data only

01b: Audio unit consisting of audio data and real-time information

10b: A mute unit consisting only of audio data for muting

11b: Picture unit consisting only of still pictures

(2) Application of ATS unit (b3～b0)

0000b: No description

0001b: Concentrating part

Other: reserved

The encoding device of the fifth embodiment will be described below. 69 and 70 show the configuration and processing of the encoding device, respectively. The analog audio signal A is sampled by the A/D converter 31 at a sufficiently high sampling frequency (sampling period Δt), for example, 192 kHz, and converted into a high-resolution PCM signal of, for example, 24 bits. Next, when no compression is performed in the bit shift/signal processing circuit 32, the PCM data converted by the A/D converter 31 is applied to the DVD formatter 34 as it is. In contrast, in the case of compression, the PCM data converted by the A/D converter 31 is compressed by the bit shift/signal processing circuit 32 according to its encoding method, and then applied to the DVD formatter 34 (step S5 , S6). In the bit shift/signal processing circuit 32, each channel of the group "2" is bit shifted.

The video signal V is converted into a digital signal by the A/D converter 31, and then the digital video signal is encoded into an MPEG format by the V encoder 32V, and supplied to the DVD formatter 34 (steps S1, S2). The still picture signal SP is converted into a digital signal by the A/D converter 31SP, and then the digital still picture signal SP is encoded into an MPEG format by the compression encoder 32SP and supplied to the DVD formatter 34 (steps S3 and S4). Copyright information and real time text information (RTI) pass through the interface (I/F) 40 (steps S7, S8), and the text information and disc identifier EX are applied to the DVD formatter 34 (steps S9, S10).

Next, the DVD formatting unit 34 performs packaging to obtain the format as described above (step S11). The data formatted by the DVD formatter 34 is modulated by the modulation circuit 35 with a modulation method corresponding to the disc, and the disc is manufactured based on the modulated data, or recorded in the recording unit 38, and then transmitted through the communication I/F 39. Transmission (step S12).

FIG. 71 shows the specific configuration of the decoding apparatus of the fifth embodiment, and FIG. 72 functionally shows the configuration of FIG. 71. Fig. 73 shows its processing. In Fig. 71 and Fig. 72, first, as in the case shown in Fig. 19, when the operation part 18 and the remote controller 19 perform song selection, playback, fast forward, and stop operations, the control part 23 The drive device 2 and the playback device 17 are controlled, and at the time of playback, the bit data recorded in the DVD disc 1 is read through the drive device 2, and EFM demodulation is performed.

In the playback device 17, the signal is sent to the still picture and V packet detection section 3 and the A and RTI packet detection section 9. In the case that still picture packs and V packs are recorded on disc 1, still picture packs and V pack detection sections 3 detect the still picture packs and V packs in the playback data and set control parameters to parameter section 8. Still picture packets and V packets are written into the still picture and V packet buffer 4 in sequence. The still picture pack in the still picture and V pack buffer 4, the user data (video signal, still picture information) in the V pack are passed through the buffer extractor 5 according to the SCR in the still picture pack and the V pack (referring to FIG. 13 ). ) in order of packet order and output time order, and then output as an analog video signal through the expansion sum map conversion unit 6, D/A conversion unit 7, and video output terminals 15, 15′.

The A and RTI packet detection unit 9 detects the A and RTI packets in the playback data, sets control parameters for the parameter unit 14, and simultaneously writes the A and RTI packets into the A and RTI packet buffer 10 in sequence. The user data (audio signal, real-time information) in the A packet and RTI packet written into the A and RTI packet buffer 10 are sequentially fetched by the buffer fetching unit 11 according to the packet sequence and the output time sequence. Next, the audio signal is output as an analog audio signal through the PCM conversion and bit shift/signal processing unit 12 , the D/A conversion unit 13 , and the audio output terminal 16 . The real-time information is sent to the display signal generation unit 20 to generate a display signal, and the display signal is output through the display signal output terminal 22 or to the built-in character display unit 21 .

The processing of this decoding device will be described with reference to FIG. 73 . First, the disk 1 is accessed to read the recorded data (step S20), and then, in each separation step S21 to S29, it is separated into a video signal, a still picture signal, an audio signal, copyright information, and real-time information (RTI). , text information and disc identifier EX. Next, in the respective decoding steps S22 to S30, the separate data are decoded respectively, and then reproduced synchronously (steps S31, S32).

Among them, there are the following three steps in the process of playing back the still picture SP:

1) When a still picture SP is obtained, the audio signal A is interrupted to mute.

2) When the still picture SP is obtained, it is played back together with the audio signal A according to the time control signal.

3) When the still picture SP is obtained, the page-turning playback is performed according to the page-turning instruction given by the user. At this time, the audio signal A is reproduced as it is.

When there is a need to keep the still picture in sync with the sound, the time control signal for real-time synchronization is placed in the time control data information (SPCIT_TCDI) of the still picture control information table APCIT in the ATSI of FIG. )middle.

Further, the still picture page control instruction information (SPPI) accommodating the page turning instruction is placed under the SPCIT. Thus, the SPCIT is composed of SPCIT general information (SPCIT_GI) of general information, time control data information (SPCIT_TCDI), and still picture page control instruction information (SPPI).

However, the still picture data of the SPCT packet in FIG. 49 may include size information for controlling the page size of the still picture. The page control information specified by this size information can be interpreted while referring to SPPI.

In the case where there is no room to accommodate the still picture data, it is permissible to include the above-mentioned page size information for controlling the still picture in the RTI data of the RTI packet.

Fig. 74 shows the signal used to reproduce the signal recorded in discs 110 such as DVD audio discs and DVD video discs in which time information and page turning commands are recorded in order to keep the still picture and sound synchronized as shown in Fig. 42 (B). device. The disk drive device 111 is controlled by a drive control circuit 112, and the disk 110 is driven by the disk drive device 111 to read recording signals. The signal is EFM demodulated by the demodulation circuit/error correction circuit 113, and then, after error correction, the transport stream signal except the control data and DSI data is written in the drive buffer 114 by the write control circuit 115, and the control data and DSI data are written into the system buffer 117 and the DSI buffer 122, respectively. The data written in the DSI buffer 122 is decoded by the DSI decoder 151 and output.

The system controller 132 performs playback control based on the control data written in the system buffer 117 . In order to perform playback control, an operation unit 130, a display unit 131, a readable/writable system parameter storage 133, a playback-specific system parameter storage 134, and a readable/writable general-purpose parameter storage 135 are connected to the system controller 132. and system timer 136 .

The transport stream signal written into the drive buffer 114 is read by the read control circuit 116, and then separated by the demultiplexer 128 into still picture packets, RTI packets, VBV packets, sub-picture packets, VBI packets, and audio packets. They are stored in the still picture buffer 147, the RTI packet buffer 148, the VBV packet 118, the sub-picture buffer 119, the VBI buffer 120, and the audio packet buffer 121, respectively. Next, the still picture packet and the RTI packet are decoded and output by the still picture decoder 149 and the RTI decoder 150, respectively, and the RTI data decoded by the RTI decoder 150 is stored in the buffer 150'.

The VBV packet is decoded by the video decoder 123 and then sent to the adder 127 by the letterbox converter 126 . The sub-picture packet and the VBI packet are respectively decoded by the sub-picture decoder 124 and the VBI decoder 125 and sent to the adder 127, and these video signals are synthesized in the adder 127. The audio packets are sent to the audio decoder 129, and converted into analog signals by the format decomposer 141, the channel separator 142 and the D/A converters 144 and 145 therein.

Next, the playback processing of still pictures will be described with reference to FIGS. 75 and 76 . There are two types (type "1", "2") of methods for this playback processing. In FIG. 75, first, when playback starts, still picture data is accessed and stored in the still picture buffer 147 (step S61). At this time, the audio data is not reproduced for 1 to 3 seconds, and there is no sound. Next, it is discriminated whether it is type "1" (step S62). Time control information is used to reproduce in synchronization with the still picture data (step S63). On the other hand, when the type "1" is indicated, the audio data is accessed and reproduced (step S64).

In the processing of this type "2", as shown in FIG. 76, when an interrupt is generated by a user command, the command is interpreted (step S65), and the still picture page control command information (SPPI) Perform playback processing such as "going to the next frame", "returning to the previous frame", "removing" and "enlarging" of the still picture (step S66). In the processing of the still picture in this type "2", it is not synchronized with the audio signal and does not affect the playback of the audio signal.

Next, modifications of the audio decoder 129 will be described in detail with reference to FIGS. 77 and 78 . In this modified example, a sampling rate converter 143 is added. First, an audio packet is decomposed by a format decomposer 141 , and then demultiplexed into PCM data for each channel by a channel demultiplexer 142 . Next, the system controller 132 judges the sampling frequency fs of the audio data decomposed by the format decomposer 141. When the sampling frequency fs is 48 kHz of the first system, the audio data is passed from the channel separator 142 through the switches 146, 147. It is sent to the D/A converters 144 and 145 as they are. On the other hand, when the sampling frequency fs is 44.1kHz of the second system, the sampling rate converter 143 performs as shown in FIG. 78(A). The audio data is upsampled to 48 kHz of the first system, and the audio data is sent to D/A converters 144, 145 through switches 146, 147.

In the case of 96kHz of the first system, it is sent from the channel separator 142 to the D/A converters 44, 45 through the switches 146, 147 unchanged. On the other hand, in the case of 88.2kHz of the second system , the sampling rate converter 143 increases the sampling to 96 kHz of the first system as shown in FIG. Therefore, the D/A converters 144 and 145 can be constituted only by the first system. Furthermore, the sampling frequency fs of the D/A converters 144 and 145 is controlled by the system controller 132 .

Instead of converting the sampling frequency fs from the second system to the first system, as shown in FIG. 78(B), 48kHz and 96kHz of the first system can be converted to 44.1kHz and 88.2kHz of the second system. Furthermore, even when the sampling frequency fs of each channel of the multi-channel signal is the first system, as shown in FIG. 78(C), when a certain channel is 48kHz, the sampling frequency can be upsampled. It is 96kHz, and all the channels are made consistent to 96kHz to perform D/A conversion, thereby improving the playback sound quality.

Next, referring to Figs. 79 and 80, a reproducing apparatus for displaying copyright information in superimposed subtitles will be described. In FIG. 79 , the still picture packets are sent to the still picture decoder 149 through the still picture buffer 147 to decode the still picture data, and the still picture data is supplied to the adder 201 . The RTI packet is sent to the RTI decoder 150 through the RTI packet buffer 148 for decoding, and the decoded data is stored in the buffer 150'. At this time, when the RTI packet contains copyright data (UPC/EAN-ISRC data shown in Figure 45 and Figure 46), the text character information is converted into character image data by the image conversion unit 200, and added to the addition 201 to synthesize with still images and output to the outside, or output to the outside through the switch 203.

The audio packets pass through the audio packet buffer 121 and are decomposed by the format decomposer 141, and each data is stored in the buffer 141'. At this time, when the audio pack contains copyright data (UPC/EAN-ISRC data shown in FIGS.

The operation thereof will be described with reference to FIG. 80 . First, when an instruction to display copyright information of a still picture is sent from the operation unit 130, the still picture decoded from the still picture packet and the copyright information converted into image data by decoding from the RTI packet are combined by the adder 201. Addition operation and output (step S71→S72). On the other hand, when there is no display instruction of the copyright information of the still picture, the copyright information decoded from the RTI packet is not added (step S71→S73), and then it is judged whether the copyright information of the still picture is transmitted from the operation unit 130. Display instruction of information (step S74). Next, when there is a display instruction, the copyright information decoded from the audio pack is converted into text information by the code converter 202, and the RTI output is performed by the switch 203 (step S74→S75). When indicated, the RTI output is not performed. This processing is performed in units of cells or tracks.

Among them, the audio decoder with the configuration shown in FIG. 77 and the copyright information reproducing device (and audio decoder) shown in FIG. 79, except the method shown in FIG. In addition, it can also be configured as an IC chip as a single product, and used as a component of a DVD video playback device or a personal computer.

Next, an embodiment in which the digital audio signal formatted as above is transmitted through a communication line will be described. First, the packaging device as the sending side will be described with reference to FIGS. 81 to 85 . The packaging device includes a packaging processing unit 30 , a buffer memory 30B, a control circuit 29 , an operation unit 27 , and a display 28 as shown in FIG. 81 . In FIGS. 82 to 85, first, when a video signal V, a still picture signal SP, an audio signal A, a real-time information RTI, and a disc identifier EX are input, an audio pack is generated as shown in detail in FIG. 83 in step S100 ( Step S101), then, generate video packets (step S102), then generate still image packets (step S103), and then generate real-time text (step S104).

Then manage the audio unit (ATS-C) (step S200), then manage the PTT (title part) (step S300), then manage the title (AOTT-AOB) (step S400), then manage the title group (AOTT-AOBS) (step S500). Next, in step S600, in order to generate an ATS, a title group is generated as shown in detail in FIG. 84 (step S601), and then a menu is generated (step S602). Then, the category of ATS_PGCI is described (step S603), and then PGIT composed of PG directory including bit shift is generated, and ATS_PGCIT is generated by generating PGIT (step S604). Next, ATSI is generated by generating MAT of attributes and coefficients (step S605). Then AMG is generated (step S700), and finally TOC is generated (step S800).

Next, when the above-mentioned formatted digital audio signal is transmitted through the communication line, as shown in FIG. A header including the sender's address is given to the top of the packet (step S42), and then output to the network (step S43).

Next, the data reception side will be described with reference to FIGS. 86 to 90 . As shown in FIG. 86 , the unpacking device on the data receiving side has an unpacking processing unit 60 , a buffer memory 60B, a parameter memory 56 , a control circuit 59 , an operation unit 57 , and a display 58 . First, as shown in FIG. 87, the header is removed from the packet received by the network (step S51), then the received data is restored (step S52), and then transferred to the memory (step S53).

Next, as shown in FIGS. 88 to 90 , first, the AMG is decoded to detect the ATS (step S1100 ), and then in step S1200 , in order to decode the ATSI of the target ATS, as shown in FIG. 89 in detail Decode the カテゴリ of ATS-PGCI as above (step S1201), then decode the PGIT composed of the PG directory containing the bit displacement (step S1202), then decode the attributes and coefficients of the MAT (step S1203), and then These decoded parameters are set in the parameter memory 56 (step S1204).

Next, when starting playback, identify the packet (step S1300), then, in step S1400, in order to decode the packet, decode the audio packet as shown in detail in Figure 90 (step S1401), and then decode the video packet Decoding is carried out (step S1402), then the still picture packet is decoded (step S1403), and then the real-time text is decoded (step S1401). Next, the audio signal, video signal, still picture signal and real-time text signal decoded from these packets are output (step S1500), and during playback, steps S1300 to S1500 are repeated.

The digital encoding device and the decoding device can store the above-mentioned encoding method and decoding method as a computer program in an IC chip such as a ROM, and the CPU (central processing unit) of the computer is operated by the program to realize its functions. The present invention is not limited to the scheme of transmitting through recording media such as DVD, and can also be used for transmitting through communication lines such as the Internet and karaoke communication lines, and processing by hardware and application programs on the PC on the playback side Condition.

As described above, according to the present invention, instead of a DVD-Video title set and a management area including information for managing the above-mentioned DVD-Video title set, an audio title set having audio data and still picture data without a playback control pack is provided. And the management area including the information for managing the DVD audio title group, so that when the audio signal is mainly recorded, the user can easily reproduce it, use it more easily, and simplify the actual time management.

According to the present invention, when playing back a first pack having audio data as actual data, a second pack having real-time information data associated with the audio data as actual data, and a third pack having still picture data associated with the audio data as actual data In the case of the packet data structure, playback is performed by three systems of buffers and decoders. Therefore, it is not necessary to perform high-speed decoding processing on still pictures, and thus, it can be configured at low cost. Furthermore, the still picture can be reproduced synchronously with the audio signal, or the page can be turned and displayed independently of the reproduction of the audio signal.

According to the present invention, when A/D conversion is performed on audio data and multi-channel audio data at the sampling frequency of two systems, D/A conversion is performed in accordance with one system, thereby eliminating the need to provide two systems of A/D conversion. /D converter, so it can be configured at low cost.

According to the present invention, when copyright data related to audio data and still picture data is recorded on a disc, the still picture data and copyright data are synthesized to display superimposed subtitles, thereby efficiently dealing with duplication.

According to the present invention, the text information related to the audio data and the display time control data for controlling the display time are arranged in the management pack containing the information for managing the audio pack, and the text information is displayed according to the display time control data. In the case where audio data such as source data is mainly recorded, text information indicating the content can be efficiently recorded and displayed.

According to the present invention, character information related to audio data and display time control data for controlling its display time are arranged in a character display pack different from audio packs and management packs, and character information is displayed according to the display time control data, thereby , in the case of mainly recording audio data such as a music source, it is possible to effectively record and display text information indicating its content.

According to the present invention, the text information related to the audio data is arranged in the text display package, and the information for managing the audio package and the display time control data for controlling the display time of the text information are arranged in other management boxes different from the audio package and the text display package. In the packet, character information is displayed based on the display time control data, so that when audio data such as music sources are mainly recorded, character information indicating the content can be efficiently recorded and displayed.

According to the present invention, the text information related to the audio data and the display time control data for controlling its display time are arranged in the text display package, and other display control data except the display time control data are arranged in the management package. By displaying text information using display control data other than the control data, when audio data such as music sources are mainly recorded, text information indicating the content can be efficiently recorded and displayed.

Claims (2)

1. A method of encoding a sound signal, comprising the steps of:

quantizing a first digital audio signal of a first channel group and a second digital audio signal of a second channel group, which are respectively allocated to a channel group including a left front channel and a right front channel in front of the first channel group and a channel group including a left surround channel and a right surround channel in rear of the second channel group, of a plurality of channels, and which are different according to each channel of the first channel group and the second channel group;

bit-shifting the second digital audio signal by the same bit-shift amount for the channels of the second channel group to generate a third digital audio signal; and

the data structure is formatted as an audio header group including a plurality of audio objects each of which is composed of an audio packet in which the first digital sound signal and the third digital sound signal are arranged, and the data structure is arranged in a dedicated header of the audio packet: sampling frequencies of respective channels of the first channel group and the second channel group; the same bit shift amount for each channel of the second channel group; and channel assignment information for designating each channel of the assigned first channel group and second channel group, respectively, and the audio title group information of the audio title group is configured with: sampling frequencies of respective channels of the first channel group and the second channel group; the same bit shift amount for each channel of the second channel group; and channel allocation information for designating the channels of the first channel group and the second channel group allocated as described above, respectively.

2. A method for decoding an audio signal, which decodes data encoded by the audio signal encoding method according to claim 1, comprising the steps of:

extracting the first digital sound signal and the third digital sound signal configured in the audio packet;

extracting the sampling frequency, the same bit shift amount, and the channel allocation information of each channel, which are arranged in the audio header group information of the audio header group or the dedicated header of the audio packet; and

decoding the first digital audio signal and the third digital audio signal based on the extracted sampling frequency of each channel, the same bit shift amount, and the channel allocation information.

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