WO2007026718A1 - 記録装置、記録方法、再生装置、再生方法、プログラムおよび記録媒体 - Google Patents
記録装置、記録方法、再生装置、再生方法、プログラムおよび記録媒体 Download PDFInfo
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- WO2007026718A1 WO2007026718A1 PCT/JP2006/317014 JP2006317014W WO2007026718A1 WO 2007026718 A1 WO2007026718 A1 WO 2007026718A1 JP 2006317014 W JP2006317014 W JP 2006317014W WO 2007026718 A1 WO2007026718 A1 WO 2007026718A1
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- content file
- file
- decoding
- information
- recorded
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Classifications
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
- G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
- G11B27/034—Electronic editing of digitised analogue information signals, e.g. audio or video signals on discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
- G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
- G11B27/327—Table of contents
- G11B27/329—Table of contents on a disc [VTOC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/92—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N5/9201—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving the multiplexing of an additional signal and the video signal
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/60—Solid state media
- G11B2220/65—Solid state media wherein solid state memory is used for storing indexing information or metadata
Definitions
- Recording apparatus recording method, reproducing apparatus, reproducing method, program, and recording medium
- the present invention relates to a recording apparatus, a recording method, a reproducing apparatus, and a reproducing method for recording a content file and an index file for managing the content file on a recording medium, or reproducing the content file with this recording medium capability. , Relating to programs and recording media.
- the present invention provides a decoding information storage area that collectively stores information related to decoding of each content file recorded on a recording medium for the index file.
- the size of the index file can be reduced by setting pointer information indicating information related to the corresponding decoding in the decoding information storage area to each entry provided corresponding to each content file and to which the attribute information of the corresponding content file is assigned.
- the present invention relates to a recording apparatus or the like that can record in detail information relating to the decoding of each content file without significantly increasing it, for example, to correctly determine whether or not each content file can be played.
- Patent Document 1 Conventionally, a method using an index file has been proposed in Patent Document 1, Patent Document 2, Patent Document 3, and the like as a method for easily finding a desired file having a large number of files recorded on a large-capacity recording medium. Being sung.
- the index file manages each content file and is generated as a collective force of attribute information of each content file.
- content file attribute information include thumbnail image data, title text data, imaging date / time, codec information, face detection information (detected face size, detected face position, detected face score). is there.
- the index file includes a text file (or metadata file) FTX, a thumbnail image file FTH, and a property file FP.
- the attribute information of each content file is divided into a text file FTX, a thumbnail image file FTH, and a property file FP.
- Fig. 9 shows the case where the attribute information of each content file includes the attribute information placed in each of the text file FTX, thumbnail image file FTH, and property file FP! /
- an index file composed of a property file, a thumbnail image file, and a text file (or metadata file) is particularly referred to as an AV-index file.
- the text file FTX manages text information (in the case of a metadata file, metadata).
- Thumbnail image file FTH manages thumbnail image data.
- the property file FP manages attribute information (basic attribute information) excluding attribute information related to the text file FTX or thumbnail image file FTH, and manages connection information between slots of other files.
- a header indicating attributes and the like is arranged at the head.
- the header of the text file FTX and thumbnail image file FTH does not have a header.
- the header indicating the attribute etc. may be placed at the beginning of the text file FTX and thumbnail image file FTH.
- an entry that also has attribute information power of each content file (property entry # 1, property entry # 2, ..., thumbnail image entry # 1, thumbnail image entry # 2, ..., text entry # 1, Text entries # 2, ⁇ ⁇ ⁇ ) are arranged in succession.
- Data indicating a character string of a title related to a disc title, each content file, and the like is assigned to each entry of the text file FTX.
- a thumbnail image data indicating the disc title and the contents of each content file is assigned to each entry of the thumbnail image file FTH.
- Each entry of the text file FTX and the thumbnail image file FTH is composed of a fixed-length slot.
- the number of slots constituting each entry is one or more depending on the data amount of attribute information assigned to each entry.
- the type of attribute information differs, so there are cases where no entry is provided as described above.
- management information specifying the corresponding entry of the text file FTX and thumbnail image file FTH (indicated by arrows in FIG. 9) as management information indicating the relationship with other entries. Related information) is set.
- management information for specifying the subsequent slot is set in each slot.
- information for specifying the corresponding content file is set in each entry of the property file FP.
- the index file is configured as described above. Therefore, for example, a data string recorded in the text file FTX can be reproduced and the titles of the respective content files recorded on the recording medium 2 can be displayed as a list. In addition, for example, the data sequence recorded in the thumbnail image file FTX can be reproduced, and the thumbnail images of the respective content files recorded in the recording medium 2 can be displayed as a list.
- the index file can also be defined by a text file FTX, a thumbnail image file FTH, and a property file FP even for such a virtual folder that is not just an actual content file.
- FTX text file
- thumbnail image file FTH thumbnail image file
- property file FP information defining the hierarchical structure of the content file and the virtual folder is set.
- FIG. 10 shows an example of the correspondence between the property file, the content file, and the virtual folder.
- the virtual folder with the imaging date “October X day” and the virtual folder with the imaging date “October ⁇ day” exist in the same hierarchy, and the lower level of the virtual folder with “October X day”.
- the property file includes file entry # 1, folder entry # 4, file entry # 6, folder entry # 8 and folder entry # 9 as shown in FIG. Is formed.
- the number of each entry is the number of the first slot constituting the entry. In the illustrated example, the number of each entry is the minimum number of the slots constituting the entry for convenience. Yes.
- File entries # 1, # 6, and # 9 manage content files of "MPEG2PS-1,” “MPEG2PS-2,” and “MPEG2PS-3,” respectively, and folder entries # 4, # 8 , Respectively, manage virtual folders of “October X day” and “October ⁇ day”.
- a recording medium such as an optical disk may be loaded in various devices to record various content files.
- it may be difficult to decode any of the various format content files recorded on the recording medium with a device having poor decoding capability.
- content files that are difficult to decode are displayed as a list of thumbnail images, the user-friendliness is reduced.
- Patent Document 2 information on the decode of each content file recorded on the recording medium is recorded in the corresponding entry of the index file, and each record is based on this record.
- a method for determining whether or not a content file can be decoded on an index file is disclosed.
- Patent Document 2 also discloses a method of recording information relating to the decoding by encoding.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2004-227630
- Patent Document 2 Japanese Patent Application Laid-Open No. 2004-227633
- Patent Document 3 Japanese Unexamined Patent Publication No. 2005-115815
- information relating to decoding there are various types of information relating to decoding.
- examples of information relating to decoding include codec type, codec profile type and level information, bit rate, and screen size.
- information on decoding includes, for example, codec type and codec. Profile type and level information, bit rate, sampling frequency, and other information.
- An object of the present invention is to make it possible to record information relating to decoding of each content file in some detail without significantly increasing the size of the index file, and to correctly determine whether or not each content file can be played. There is.
- a content file including at least encoded video data or encoded audio data and an index file that manages each content file and is generated from a set of attribute information of each content file are recorded on a recording medium.
- a recording device for recording In a recording device for recording,
- a content file recording unit configured to record the content file on the recording medium; and the content file recording unit configured to register the predetermined content file when the predetermined content file is recorded on the recording medium.
- An index file update unit for updating the index file
- the index file corresponds to each content file recorded on the recording medium. And a predetermined number of entries to which the attribute information of the corresponding content file is assigned, and a decode information storage area for storing information relating to decoding of each content file,
- Each of the predetermined number of entries has pointer information indicating information related to decoding of a corresponding content file among information related to decoding recorded in the decoding information storage area.
- the index file updating unit When updating the index file so that the predetermined content file is registered, the index file updating unit corresponds to the predetermined content file and records the index file in the decode information storage area. An entry having pointer information indicating information related to decoding of the predetermined content file being added is added.
- the recording apparatus is characterized by the above.
- a recording medium on which at least encoded video data or encoded audio data is recorded, and an index file that manages each content file and generates attribute information of each content file is generated.
- a playback device that plays a predetermined content file
- the index file collectively stores a predetermined number of entries to which the attribute information of the corresponding content file is assigned and information related to decoding of the content file corresponding to each content file recorded on the recording medium. And a decoding information storage area,
- the predetermined number of entries are recorded in the decode information storage area, and have pointer information indicating information related to decoding of the corresponding content file among the information related to decoding, and
- a content file reproduction unit for reproducing a predetermined content file from the recording medium card and obtaining video data or audio data included in the predetermined content file;
- the recording medium power Index file playback unit for playing back the index file
- the content file reproduction unit determines whether or not the predetermined content file can be reproduced by referring to the information regarding the decoding based on the pointer information.
- At least a content file and an index file are recorded on the recording medium.
- the index file manages each content file and is generated from a set of attribute information of each content file.
- the content file is recorded on the recording medium by the content file recording unit.
- the index file has an entry corresponding to each content file recorded on the recording medium, and a decode information storage area in which information related to decoding of each content file is stored together.
- Each entry is assigned attribute information of the corresponding content file, and is recorded in the decoding information storage area, and pointer information indicating information on decoding of the corresponding content file among the information on decoding is recorded. Arranged.
- the index file is updated such that the predetermined content file is registered.
- the index file has a power for adding an entry corresponding to the predetermined content file, and the entry has pointer information indicating information related to decoding of the predetermined content file.
- information related to decoding of each content file recorded on the recording medium is collectively stored in the decode information storage area provided in the index file, and provided in the index file corresponding to each content file.
- the pointer information indicating the information related to the corresponding decoding in the decoding information storage area is arranged in the entry. Therefore, it is possible to avoid duplicating information related to the same decoding in the index file, and the information related to decoding is recorded without being encoded, so the size of the index file is greatly increased. It is possible to record in detail the information regarding the decoding of each content file.
- the index file update unit differs in the bit rate or frame rate from the information related to decoding of a predetermined content file in the decoding information storage area, and the bit rate or frame rate of information related to decoding of a predetermined content file is different.
- information related to decoding having a bit rate or frame rate of a value rounded up to a fixed digit is recorded, it is determined that information related to decoding of a predetermined content file is recorded in the decoding information storage area. It may be. In this case, it is possible to display information related to a plurality of decodes together, and the index file final size can be reduced.
- a predetermined content file is selectively reproduced from the recording medium by the content file reproduction unit.
- the predetermined content file power It is determined whether or not a reproducible force is available. In this way, since it is possible to determine whether or not playback is possible based on the decoding information corresponding to the predetermined content file, it is possible to correctly determine whether or not the predetermined content file can be played back.
- the decoding information included in the index file Whether or not reproduction is possible is determined for each piece of information stored in the storage area, and the determination result is stored in a predetermined storage area in association with the pointer information.
- the recording medium power is also stored in a predetermined storage area in association with the pointer information held by the index file entry corresponding to the predetermined content file when the predetermined content file is reproduced. Whether or not the reproduction is possible is determined.
- the determination result stored in advance in the predetermined storage area can be used, and whether or not the predetermined content file can be reproduced can be determined at high speed.
- the decoding information storage area for storing information related to the decoding of each content file recorded on the recording medium in the index file
- the index file corresponds to each content file.
- Pointer information that points to information related to the corresponding decoding in each decoding information storage area is set in the entry to which the attribute information of the corresponding content file is assigned, greatly increasing the size of the index file.
- Information regarding the decoding of each content file can be recorded in detail, and whether or not each content file can be reproduced can be correctly determined.
- FIG. 1 is a block diagram showing a configuration of an optical disc device.
- FIG. 2 A diagram showing that a property file has a system information entry and a plurality of file entries.
- FIG. 3 is a diagram showing a configuration of a profile data list provided in a system information entry.
- FIG. 4 is a diagram showing a configuration of an AV profile entry assigned to a profile data list.
- FIG. 5 is a diagram showing a configuration of a video profile entry that constitutes an AV profile entry.
- FIG. 6 is a diagram showing a configuration of an audio profile entry that constitutes an AV profile entry.
- FIG. 7 A flow chart showing the processing procedure of the system control microcomputer when recording a content file It is a chart.
- FIG. 8 is a flowchart showing the processing procedure of the system control microcomputer during playback of a content file.
- FIG. 9 is a diagram for explaining a text file, a thumbnail image file, and a property file that constitute an index file.
- FIG. 10 A diagram showing an example of the correspondence between a property file, a virtual folder, and a content file.
- FIG. 1 shows a configuration of an optical disc apparatus 1 as an embodiment.
- the optical disc device 1 acquires a video signal and an audio signal of a subject by an imaging unit and an audio acquisition unit (not shown), and the video signal and the audio signal card image content are stored on the optical disc 2 as a content file. Record.
- the optical disc apparatus 1 reproduces the content file recorded on the optical disc 2 and outputs it from the display means using the liquid crystal display panel and the sound output means using the speaker, and also to the external device.
- the optical disk apparatus 1 encodes a video signal and an audio signal in the MPEG (Moving Picture Experts Group) format, and then records the encoded signal on the optical disk 2 in a predetermined file format.
- MPEG Motion Picture Experts Group
- the optical disc apparatus 1 includes an optical disc 2, a video encoder 11, an audio encoder 12, a video decoder 13, an audio decoder 14, a file generator 15, a file decoder 16, and a memory. 17, memory controller 18, system control microcomputer (hereinafter referred to as “system control microcomputer”) 19, memory 20, error correction code Z decoder 21, Live control microcomputer (hereinafter referred to as “drive control microcomputer”) 22, data modulator / demodulator 23, magnetic field modulation driver 24, operation unit 26, servo circuit 30, spindle motor 31, magnetic field head 32, And an optical pickup 33.
- the optical disc 2 constitutes a recording medium.
- the video encoder 11 performs analog-to-digital conversion processing on the video signal resulting from the imaging result, generates video data, encodes the video data according to the MPEG format, and outputs an elementary stream having the power of video data .
- the audio encoder 12 generates audio data by performing analog-digital conversion processing on the audio signal related to the captured content, encodes the audio data according to the MPEG format, and outputs an elementary stream based on the audio data.
- the file generator 15 multiplexes the elementary streams output from the video encoder 11 and the audio encoder 12, and is controlled by the system control microcomputer 19 to execute a content file in a predetermined file format.
- the memory controller 18 switches operations during recording and reproduction under the control of the system control microcomputer 19.
- the memory controller 18 sequentially records the data string based on the content file output from the file generator 15 and the various data output from the system control microcomputer 19 in the memory 17 and temporarily holds them. Data stored corresponding to the processing of the error correction code Z decoder 21 is output.
- the memory controller 18 sequentially records the output data of the error correction code Z decoder 21 in the memory 17 and temporarily holds it, and outputs a data string based on the content file to the file decoder 16.
- Various data are output to the system control microcomputer 19.
- the error correction code Z decoder 21 switches its operation during recording and reproduction under the control of the system control microcomputer 19.
- the error correction code Z decoder 21 temporarily records the output data of the memory controller 18 in the memory 20 during recording, and adds an error correction code. Further, this error correction code Z decoder 21 reads the data held in the memory 20 in this way in a predetermined order during recording, and outputs the interleaved data to the data modulator / demodulator 23.
- the error correction code Z decoder 21 is output from the data modulator / demodulator 23 during reproduction. Interleaving processing is performed by temporarily recording data in the memory 20 in a predetermined order, and error correction processing is performed using an error correction code added at the time of recording. Further, this error correction code Z decoder 21 reads out the data held in the memory 20 in this way in the same order as at the time of recording and outputs it to the memory controller 18 during reproduction.
- the data modulator / demodulator 23 switches its operation during recording and reproduction under the control of the system control microcomputer 19.
- the data modulator / demodulator 23 converts the output data of the error correction code Z decoder 21 into a serial data string, modulates it, and outputs it to the magnetic field modulation driver 24 or the optical pickup 33.
- the data modulator / demodulator 23 reproduces the reproduction signal power clock output from the optical pickup 33 at the time of reproduction, and binary-identifies the reproduction signal based on this clock to perform demodulation processing, thereby recording.
- Reproduction data corresponding to the generated serial data string is obtained, and this reproduction data is output to the error correction code Z decoder 21.
- the magnetic field modulation driver 24 drives the magnetic field head 32 according to the output signal of the data modulator / demodulator 23 under the control of the system control microcomputer 19 during recording when the optical disk 2 is a magneto-optical disk.
- the magnetic field head 32 is held so as to face the optical pickup 33 with the optical disc 2 interposed therebetween, and applies a modulation magnetic field according to the output data of the data modulator / demodulator 23 to the laser beam irradiation position by the optical pickup 33. Therefore, when the optical disk 2 is a magneto-optical disk, the optical disk apparatus 1 records content inole etc. on the optical disk 2 by a thermomagnetic recording technique.
- the optical disk 2 is a rewritable optical disk such as a magneto-optical disk (MO) or a phase change disk.
- the spindle motor 31 controls the optical disk 2 according to its type under the control of the servo circuit 30 according to the type of the linear velocity (CLV), constant angular velocity (CAV), zone CLV (ZCLV: Zone Const Rotation drive under conditions such as (ant linear Velocity).
- CLV linear velocity
- CAV constant angular velocity
- ZCLV Zone Const Rotation drive under conditions such as (ant linear Velocity).
- the servo circuit 30 controls the operation of the spindle motor 31 based on various signals output from the optical pickup 33.
- the servo circuit 30 performs tracking control and focus control of the optical pickup 33 based on various signals output from the optical pickup 33, seek control of the optical pickup 33 and magnetic field head 32, and further focus search. Etc. are executed.
- the drive control microcomputer 22 controls operations such as seeking in the servo circuit 30 according to instructions from the system control microcomputer 19.
- the optical pickup 33 irradiates the optical disc 2 with a laser beam, receives the return light with a light receiving element, and calculates the light reception result of the light receiving element to generate various control signals. In addition, a reproduction signal whose signal level changes according to the pit row and mark row formed on the optical disc 2 is outputted.
- the optical pickup 33 switches its operation under the control of the system control microcomputer 19, and when the optical disc 2 is a magneto-optical disc, the amount of the laser beam applied to the optical disc 2 is intermittently raised during recording. increase.
- the optical disc apparatus 1 records content files and the like on the optical disc 2 by a so-called pulse train method.
- the optical pickup 33 changes the light amount of the laser beam applied to the optical disc 2 according to the output data of the data modulator / demodulator 23 from the light amount at the time of reproduction to the light amount at the time of writing. Launch.
- the optical disc apparatus 1 records a content file or the like on the optical disc 2 by applying a thermal recording method.
- the file decoder 16 receives content file data output from the memory controller 18, decomposes the data into elementary data streams of video data and audio data, and outputs them.
- the video decoder 13 decompresses the video data elementary stream output from the file decoder 16 and outputs it to a display means and an external device, not shown.
- the audio decoder 14 decompresses the elementary stream of the audio data output from the file decoder 16 and outputs the decompressed audio output means to an external device (not shown).
- the operation unit 26 includes various operators of the optical disc device 1, a touch panel disposed on the liquid crystal display panel, and the like, and notifies the system control microcomputer 19 of various operations by the user.
- the system control microcomputer 19 is a microcomputer that controls the overall operation of the optical disc device 1, and controls the overall operation by executing a predetermined processing program recorded in a memory (not shown).
- the system control microcomputer 19 The processing program according to the above is installed and provided in advance in the optical disc apparatus 1. However, this processing program is provided by downloading via a network such as the Internet instead of such prior installation, or on various recording media such as an optical disk, a magnetic disk, and a memory card. It may be recorded and provided.
- the system control microcomputer 19 seeks the optical pickup 33 to the innermost periphery of the optical disc 2, and the file management system related to the optical disc 2 Play back management information. Further, the system control microcomputer 19 acquires the reproduced management information from the memory controller 18 and holds it in the built-in memory.
- the system control microcomputer 19 detects the address and free area of each file recorded on the optical disc 2 by holding the management information in the built-in memory in this way. In addition, the system control microcomputer 19 plays back the index file recorded on the optical disc 2 according to the search result of the management information, presents various content files recorded on the optical disc 2 to the user, and is operated by the user. Accept.
- the index file reproduced from the optical disc 2 in this way is held in the built-in memory of the system control microcomputer 1 or the memory 17. In this embodiment, the index file is held in the built-in memory.
- the system control microcomputer 19 When the system control microcomputer 19 is instructed to record the imaging result by a user operation, the system control microcomputer 19 detects an empty area from the management information stored in the built-in memory, and seeks the optical pickup 33 to the empty area. Then, the captured content file is recorded on the optical disc 2.
- system control microcomputer 19 updates the management information held in the built-in memory so as to correspond to the recording of the content file, and the optical disc 2 is updated by the updated management information when the optical disc 2 is ejected. Update the management information recorded in.
- system control microcomputer 19 executes the management information held and updated in the built-in memory by outputting it to the error correction code Z decoder 21 via the memory controller 18.
- the system control microcomputer 19 When recording the content file on the optical disc 2 as described above, the system control microcomputer 19 outputs various information necessary for generating the content file to the file generator 15. To help. Further, the system control microcomputer 19 acquires information necessary for generating the index file via the video encoder 11, the audio encoder 12, and the file generator 15, and the system control microcomputer 19 acquires the acquired information. And the information output to the file generator 15, the index file stored in the internal memory is updated so as to correspond to the recording of the content file on the optical disc 2, and the data of the updated index file is updated. To update the index file recorded on the optical disc 2.
- the system control microcomputer 19 corresponds to the recording of the content file held in the built-in memory by additionally registering the entry corresponding to the content file recorded on the optical disc 2 in the index file. Update the index file as follows.
- the optical pickup 33 is located at the innermost position of the optical disk 2.
- the file management system management information is reproduced from the optical disc 2.
- This management information is held in a memory built in the system control microcomputer 19 via the memory controller 18.
- the address of each file recorded on the optical disc 2, the free space, and the like are detected based on the management information held in the internal memory. Further, after the management information is acquired in this way, the index file is reproduced from the optical disc 2 based on the search result of the management information! This index file is held in a memory built in the system control microcomputer 19.
- Video data and audio data acquired by the imaging unit and the audio acquisition unit are encoded by the video encoder 11 and the audio encoder 12, respectively, and then supplied to the file generator 15.
- the file generator 15 multiplexes the video and audio elementary streams obtained by the video encoder 11 and the audio encoder 12 to create a content file in a predetermined file format.
- This content file includes a memory controller 18, an error correction code Z decoder 21, a decoder.
- Data is recorded in a predetermined empty area of the optical disk 2 through a recording system including the data modulator / demodulator 23, the magnetic field modulation driver 24, and the optical pickup 33.
- thumbnail image data is generated from the video data.
- the index file data held in the built-in memory is updated by the system control microcomputer 19 based on the thumbnail image data and the file name of the content file which are the attribute information of the content file to be recorded.
- the index file data is stored in the built-in memory of the system control microcomputer 19 and updated to correspond to the recording of the content file.
- the index file recorded on the optical disc 2 is updated.
- the index file has an entry corresponding to each content file recorded on the optical disc 2, and a decode information storage area in which information related to decoding of each content file is stored together.
- Each entry is assigned attribute information of the corresponding content file, and is recorded in the decode information storage area, and pointer information indicating the information related to the decoding of the corresponding content file among the information related to the decoding is set. Being! Speak.
- the index file is updated so that the predetermined content file is registered. At this time, an entry corresponding to the predetermined content file is added to the index file.
- the entry has pointer information indicating information related to decoding of the predetermined content file.
- the management information is updated and the index file is updated and stored in the internal memory of the system control microcomputer 19 so as to correspond to the recording of the content file, or when the optical disc 2 is ejected, etc.
- the management information recorded on the optical disk 2 is updated with the updated management information.
- the system control my Thumbnail image data corresponding to each content file is sequentially acquired from the index file data stored in the built-in memory of 19 and the thumbnail image data related to the list display is transferred from the system control microcomputer 19 to the file decoder 16 and the video.
- the image is supplied to display means (not shown) through the decoder 13, and a list of thumbnail images related to each content file recorded on the optical disc 2 is displayed on the display means.
- the system control control microcomputer 19 reproduces the index file from the optical disc 2 and holds it in the built-in memory, and then stores it in the decode information storage area of the index file. For each piece of information regarding each decoding, it is determined whether or not playback on this optical disc device 1 is possible. The determination result is stored in a predetermined storage area in association with pointer information (indicating information related to each piece of decode information in the decode information storage area).
- the content files to be listed above are all content files recorded on the optical disc 2 or only content files that are determined to be playable.
- the thumbnail image is held in the built-in memory.
- the content file corresponding to the predetermined thumbnail image selected from the optical disc 2 under the control of the system control microcomputer 19 is played back when it can be played back. Is done.
- the content file reproduced from the optical disc 2 is obtained through the optical pickup 33, the data converter 23, the error correction code Z decoder 21, and the memory controller 18. Then, the reproduced content file is decomposed into elementary streams of video data and audio data by the file decoder 16, and then each elementary list stream is decoded by the video decoder 13 and the audio decoder 14. Is output.
- the index file consists of a text file FTX, a thumbnail image file FTH, and a property file FP, as described above with reference to FIG.
- an index file composed of a property file FP, a thumbnail image file FTH, and a text file (or metadata file) FTX is particularly called an AV-Index file.
- the attribute information of each content file is divided into a text file, a thumbnail image file, and a property file.
- Each file has a structure in which entries based on attribute information of each content file are continuously arranged.
- Each entry is configured by connecting one or more fixed-length slots.
- each entry forms a management information area!
- Data indicating the disc title and the attribute of each content file is assigned to each entry (parity entry) of the property file FP.
- management information for identifying the corresponding entries of the text file FTX and the thumbnail image file FTH is set in each entry of the property file FP.
- management information for specifying the next slot following the slot is set for each slot.
- information for identifying the corresponding content file is set in each entry of the property file FP.
- information defining the hierarchical structure of the content file, the existing folder, and the virtual folder is set in each entry of the property file FP.
- each file has a configuration in which fixed-length slots managed by a slot number indicating the number of slots from the top of the file are consecutive.
- This slot number constitutes index information indicating the arrangement order of fixed-length slots constituting the file.
- This index file is provided with a predetermined number of entries (management information areas) in which one or a plurality of fixed-length slots are connected. Each entry is identified by the slot number of the first fixed-length slot among one or a plurality of fixed-length slots connected.
- each entry in the property file FP is provided with a minimum number of slots as many as the number of slots assigned to the corresponding entry in the other file.
- a thumbnail image file FTH and a text file FTX have two slots related to one content file. If there is an entry consisting of a slot, at least two slots are assigned to the corresponding entry in the property file FP.
- FIG. 1 shows the structure of the property file FP.
- the system information entry constitutes a decoding information storage area, and information related to decoding of each content file recorded on the optical disc 2 is stored together.
- the property file FP is provided with entries corresponding to, for example, each content file successively following the system information entry.
- the entry corresponding to the content file is referred to as “file entry” as appropriate in comparison with the system information entry.
- Each file entry is provided with a profile entry index indicating information related to decoding of a corresponding content file among information related to decoding recorded in the system information entry.
- This profile entry index constitutes pointer information.
- a profile data list is provided in the system information entry.
- this profile data list an AV profile entry in which information related to decoding is recorded is provided for each type of information related to decoding related to each content file recorded on the optical disc 2.
- video data and audio data are obtained by processing the content file corresponding to the first file entry according to the information related to decoding recorded in the first AV profile entry # 1 in the profile data list. Indicates that will be decoded.
- the content file corresponding to the following two file entries is processed by the information related to the decoding recorded in the third AV profile entry # 3 in the profile data list, so that the video file is processed. Indicates that data and audio data will be decoded.
- FIG. 3 shows the structure of a profile data list provided in the system information entry.
- the number of entries (entry_count) of AV profile entries included in this profile data list is assigned to the following 2 nodes, and the number of entries N is further added to the following 96 XN bytes.
- Each 96-byte AV profile entry (av_profile_entry) is allocated sequentially.
- FIG. 4 shows the configuration of the AV profile entry.
- This AV profile entry is formed of a video profile entry (video.profile.entry) that is information related to decoding of video data and an audio profile entry (audio_profile_entry) that is information related to decoding of audio data.
- video profile entry video.profile.entry
- audio_profile_entry audio profile entry
- FIG. 5 shows a configuration of the video profile entry.
- the size (size) of the data block of this video profile entry is assigned to the first 4 bytes, and the type indicating that this data block is a video profile entry in the subsequent 4 bytes.
- the version (version) of this video profile entry is assigned to the next 1 noit, and a flag (flags) that specifies the data format in this video profile entry is assigned to the 3 next noite. ) Is allocated, and the next 4 bytes are allocated reserved.
- format information for data compression of video data is assigned to the following 4 bytes, and formats such as MPEG4 and AVC are recorded here, followed by 4 bytes.
- codec_specific_information detailed setting information of the data compression format is assigned, and the format level and the like are recorded here.
- video attribute flags (video_attribute_flags) are assigned to the following 4 bytes, and the presence / absence of security, the scanning method, etc. are recorded here, and the average bit is added to each subsequent 4 bytes.
- Rate average_bitrate
- maximum rate 'max—bitrate'
- flat 3 ⁇ 4Frame rate
- average—frame—rate maximum frame rate (max_frame_rate)
- number of horizontal and vertical samplings per screen visuaLsize
- aspect ratio pixel_aspect_ratio
- FIG. 6 shows the structure of an audio profile entry.
- the size (size) of the data block of this audio profile entry is assigned to the first 4 bytes, and this data block is an audio file entry in the following 4 bytes.
- the version of the audio profile entry is assigned to the next 1 note, and a flag that specifies the data format in this audio file entry is assigned to the next 3 notes. (flags) is assigned, followed by 4 bytes, reserved.
- format information for data compression of audio data is assigned to the following 4 bytes, and detailed setting information (format of data compression format) (following 4 bytes) codec_specific_information) is assigned and the format level is recorded here.
- audio attribute flags are assigned to the following 4 bytes, and the presence / absence of security, scanning method, etc. are recorded here, and the average bit rate for each subsequent 4 bytes. (Average_bitrate), maximum bit rate (max_bitrate), sampling rate (sampling_rate), and number of audio channel numbers (audio_channel_number) are assigned.
- FIG. 7 shows a processing procedure of the system control microcomputer 19 at the time of recording the content final.
- the system control microcomputer 19 moves from step SP1 to step SP2, for example, when the optical disc 2 is loaded.
- step SP2 the system control microcomputer 19 acquires the index file recorded on the optical disc 2 and stores it in the built-in memory.
- step SP3 the system control microcomputer 19 records a predetermined content file on the optical disc 2 in response to a user operation.
- step SP4 based on the information relating to the decoding of the predetermined content file.
- the AV profile entry recorded in the system information entry (see Fig. 2) of the indettas file is sequentially searched, and whether or not the information related to the decoding of the predetermined content file is already recorded in this system information entry is checked. to decide.
- the system control microcomputer 19 first selects an AV profile entry that is determined to have been recorded in the same recording mode as the predetermined content file recorded on the optical disc 2, as follows. To detect.
- the system control microcomputer 19 relates to the video profile entry (video_profile_entry), data compression format information (codec_type), detailed format setting information (codec_specific_information), video attribute flag (video_attribute_flags), one screen The number of samplings in the horizontal and vertical directions (visuaLsize), aspect ratio (pixel_aspect_ratio) force Detects the content corresponding to the recorded content file.
- the system control microcomputer 19 sets the format information (codec_type) used for audio data compression in the audio profile entry among the AV profile entries detected for the video profile entry, and the detailed setting of the format.
- Information codec—specinc—information), o ⁇ Aioff r, hi ⁇ tofufuku, aumo—attribute—fla gs), sampling rate (sampling—rate), channel number (audio—channel—number) ⁇ ⁇ ⁇ , Detects what corresponds to the recorded content file.
- the system control microcomputer 19 detects an AV profile entry that is determined to have been recorded in the same recording mode as the predetermined content file recorded on the optical disc 2.
- the system control microcomputer 19 rounds up the bit rate and frame rate of the recorded predetermined content file, and among the AV profile entries detected as described above, the bit rate and frame rate are , Detect what is rounded up
- the system control microcomputer 19 has an AV profile entry determined to be recorded in the same recording mode as the predetermined content file recorded in the AV profile file entry recorded in the system information entry, and The bit rate and When the frame rate is the same as the bit rate of the recorded content file and the frame rate rounded up, the information (AV profile entry) about the decoding of the recorded content file It is determined that the information is already recorded in this system information entry.
- this rounding up is performed to the extent that it can be determined that a device that reproduces a content file with the bit rate and frame rate recorded in the AV profile entry can reproduce the recorded content file. Execute with significant digits. For example, when the frame rate of the recorded content file is a frame frequency of 29.94 [Hz], the system control microcomputer 19 detects the AV profile entry at the frame frequency of 30 [Hz].
- the system control microcomputer 19 does not perform the determination process accompanied by the rounding-up process of the bit rate and the frame rate as described above, and the bit rate and the frame rate have the same power. Depending on whether or not, it is possible to determine whether or not information related to decoding of the recorded content file is already recorded in the system information entry!
- step SP4 determines in step SP4 that information related to the decoding of the recorded predetermined content file has already been recorded in the system information entry
- the system control microcomputer 19 proceeds to step SP4 and step SP5.
- step SP5 the system control microcomputer 19 additionally registers the recorded file entry of the predetermined content file in the property file FP.
- step SP6 the system control microcomputer 19 sets the property entry in this additionally registered file entry so as to point to the AV profile entry of the information relating to the decoding that has already been recorded detected in the processing of step SP4. Index (pointer information Information).
- step SP7 the system control microcomputer 19 determines whether or not the operation is instructed by the user operation. If the operation is not instructed, the system control microcomputer 19 returns from step SP7 to step SP3, A predetermined content file that continues in response to a user operation is recorded. On the other hand, when the end of the operation is instructed, the process ends in step S9.
- step SP4 force also moves to step SP8.
- step SP8 the system control microcomputer 19 creates an AV profile entry based on the recorded information on the predetermined content file decode, and adds this AV profile entry to the profile data list.
- step SP5 the system control microcomputer 19 additionally registers the file entry of the predetermined content file in the property file FP.
- the system control microcomputer 19 sets a property entry index (pointer information) in the file entry additionally registered in step SP5 so as to indicate the AV profile entry added in step SP8.
- a recording mode corresponding to another recording device having a different bit rate or the like is set. Information regarding such decoding may be recorded. In this case, other recording devices are widely used for general purposes! There is a case where a person speaks.
- correspondence with the profile level of the Memory Stick video format can be considered. In other words, if the recording level is specified by the format or rule (for example, it is determined that the level 1 is up to 128 kbps, the level 2 is up to 256 kbps, etc.), the actual device recording is done at 150 kbps. Even if the video format is not 150 kbps, 256 kbps, the upper limit of the level corresponding to this bit rate, is registered in the AV profile entry.
- FIG. 8 shows a processing procedure of the system control microcomputer 19 at the time of reproduction of the content final.
- step SP12 the system control microcomputer 19 acquires the index file recorded on the optical disc 2 and stores it in the built-in memory.
- step SP13 the system control microcomputer 19 can execute processing based on the decoding-related information recorded in each AV property entry for the AV property entry recorded in the profile data list of the obtained index file. Judge whether or not.
- the system control microcomputer 19 determines whether or not the content file by each AV property entry can be played back, and associates the determination result with the profile entry index as pointer information, so that the predetermined value in the built-in memory or the like is determined. Is stored in the storage area. In this embodiment, the system control microcomputer 19 records a profile entry index indicating the AV property entry determined to be reproducible in the built-in memory.
- step SP14 the system control microcomputer 19 accepts selection of a predetermined content file to be played in accordance with a user operation, and detects the corresponding file entry also with index file power.
- the system control microcomputer 19 accepts a selection by a user operation by displaying a list of thumbnail images using thumbnail image files recorded in an index file, displaying a list of titles using a text file, or the like.
- step ST15 the system control microcomputer 19 determines whether the profile entry recorded in the internal memory in step SP13 is set in the file entry detected from this index file.
- System control microcomputer 19 When it is determined that the profile entry index recorded in the internal memory is not set in the file entry detected from the defect file, the process proceeds from step SP15 to step SP16.
- step SP16 the system control microcomputer 19 notifies the user that it is difficult to reproduce the content file, and then returns to step SP14.
- various methods such as displaying a message indicating that reproduction is difficult can be applied to such notification to the user.
- step SP15 When the system control microcomputer 19 determines in step SP15 that the profile entry index recorded in the internal memory is set in the file entry detected from the index file, the system control microcomputer 19 proceeds from step SP15 to step SP17. In this step SP 17, the system control microcomputer 19 determines that the predetermined content file selected by the user operation can be played back, and in the subsequent step SP18, controls the entire operation to play back this predetermined content file. To do. The system control microcomputer 19 returns to step SP14 when the reproduction of the predetermined content file is completed.
- step SP15 in the determination in step SP15, the processing based on the determination result in step SP13, that is, the decoding information recorded in each AV property entry in the profile data list of the index file is executed. This is based on the result of determining whether or not it is possible, and can determine whether or not a given content file can be played at high speed. Whether or not it is possible to execute processing based on information related to decoding of the AV property entry indicated by the profile entry index that is set in the file entry corresponding to the predetermined content file in step SP15, omitting the determination in step SP13. Whether or not a predetermined content file can be reproduced may be determined.
- information related to decoding of each content file recorded on the optical disc 2 is collectively stored in the system information entry of the index file, and each content file of the index file is stored.
- Profile entry index pointer information
- indicating the corresponding AV profile entry (decoding information) in the system information entry (decoding information storage area) is placed in the entry (file entry) provided corresponding to Is a thing . Therefore, according to this optical disc apparatus 1, it is possible to avoid the same information relating to decoding being recorded in the index file, and the information relating to decoding is recorded without being coded. Detailed information on the decoding of each content file can be recorded without significantly increasing the file size.
- the predetermined content file when the index file is updated so that the predetermined content file is registered, the predetermined content file is stored in the system information entry (decode information storage area).
- the system information entry decode information storage area
- an AV profile entry information related to decoding
- the optical disc apparatus 1 shown in FIG. 1 when a predetermined content file is to be reproduced from the optical disc 2, an entry (file entry) of the index file corresponding to the predetermined content file is provided. Based on the AV profile entry (decoding information) of the system information entry (decoding information storage area) pointed to by the profile entry index (pointer information), it is determined whether or not the predetermined content filter can be reproduced. Therefore, according to this optical disc apparatus 1, since it is possible to determine whether or not playback is possible based on the AV profile entry (information related to decoding) corresponding to the predetermined content file, it is possible to correctly determine whether or not the predetermined content file can be played back.
- the index file is composed of the text file FTX, the thumbnail image file FTH, and the property file FP.
- the attribute information of each file is grouped and arranged in each of these files is shown, the present invention is not limited to this, and can be similarly applied to an index file composed of one file. .
- the present invention is not limited to this, and the case where recording is performed on various recording media such as a hard disk and a memory card. Furthermore, the present invention can be widely applied when recording content files on a reproduction-only recording medium.
- the encoder and the decoder that are the decoder and the decoder are integrated is described.
- the present invention is not limited to this, and the encoder and the decoder Is configured by software processing, and further applied to a configuration in which video data and audio data compressed from an external device are input and recorded, and these encoder and decoder are provided in the external device. It can be widely applied even when
- the present invention can record in detail information relating to the decoding of each content file without significantly increasing the size of the index file, and can thereby correctly determine whether or not each content file can be reproduced. Applicable to optical disk device
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Management Or Editing Of Information On Record Carriers (AREA)
- Television Signal Processing For Recording (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP06796991A EP1921625A4 (en) | 2005-08-29 | 2006-08-29 | Recorder, recording method, reproducing device, reproducing method, program, and recording medium |
| CN2006800011601A CN101053036B (zh) | 2005-08-29 | 2006-08-29 | 记录装置、记录方法、再生装置、再生方法 |
| US11/666,262 US20080138044A1 (en) | 2005-08-29 | 2006-08-29 | Recording Apparatus, Method for Recording, Reproducing Apparatus, Method For Reproduction, Program, And Recording Medium |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005-246963 | 2005-08-29 | ||
| JP2005246963 | 2005-08-29 |
Publications (1)
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| WO2007026718A1 true WO2007026718A1 (ja) | 2007-03-08 |
Family
ID=37808805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| PCT/JP2006/317014 Ceased WO2007026718A1 (ja) | 2005-08-29 | 2006-08-29 | 記録装置、記録方法、再生装置、再生方法、プログラムおよび記録媒体 |
Country Status (6)
| Country | Link |
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| US (1) | US20080138044A1 (ja) |
| EP (1) | EP1921625A4 (ja) |
| JP (1) | JP4325651B2 (ja) |
| KR (1) | KR20080036947A (ja) |
| CN (1) | CN101053036B (ja) |
| WO (1) | WO2007026718A1 (ja) |
Cited By (1)
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|---|---|---|---|---|
| CN101452723B (zh) * | 2008-10-16 | 2012-03-07 | 北京光线传媒股份有限公司 | 一种媒体文件播放方法、播放系统及一种媒体播放器 |
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| JP4284370B2 (ja) * | 2007-03-09 | 2009-06-24 | 株式会社東芝 | ビデオサーバ及びビデオ編集システム |
| JP2009043313A (ja) * | 2007-08-07 | 2009-02-26 | Canon Inc | 記録再生装置及び記録再生方法 |
| KR101395504B1 (ko) * | 2007-10-25 | 2014-05-14 | 엘지전자 주식회사 | 영상표시기기 및 영상재생 방법 |
| JP4865057B2 (ja) * | 2010-05-24 | 2012-02-01 | 株式会社東芝 | 画像信号処理装置及び画像信号処理方法 |
| CN107181952B (zh) * | 2016-03-10 | 2019-11-08 | 北京大学 | 视频解码方法及装置 |
| CN109994131B (zh) * | 2019-04-10 | 2021-10-22 | 广西电网有限责任公司玉林供电局 | 一种基于索引的工频录波文件压缩存储方法及系统 |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP1921625A4 (en) | 2008-10-01 |
| KR20080036947A (ko) | 2008-04-29 |
| JP4325651B2 (ja) | 2009-09-02 |
| CN101053036B (zh) | 2010-05-19 |
| US20080138044A1 (en) | 2008-06-12 |
| JP2007095271A (ja) | 2007-04-12 |
| EP1921625A1 (en) | 2008-05-14 |
| CN101053036A (zh) | 2007-10-10 |
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