JPH0787018B2 - CDI system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention reads out these data from a CDI disk that holds sound data and visual data (background image data, character image data), and outputs images and sounds. Regarding the improvement of the CDI system to be formed.

<Prior art> CDI (Compact Disc Interactive) is a CD
In addition to sound data (audio data), visual data (background image data, character image data) and the like are recorded on a (compact disc). The data stored on this CDI disc can be read by the CDI player.

The CDI standard for storing this sound data and visual data on a single CD has already been proposed by Philips. According to this CDI standard, the character of user data can be specified for each sector in a track of a CDI disk. For example, one sector can be used as sound data and the other sector can be used as visual data. The sound data is output by the audio processor as an audio output through the speaker, and the visual data is displayed by the video processor as a video output on a CRT or the like.

According to the data arrangement on the CDI disc based on the CDI standard, the sound data is arranged in tracks according to any one of three levels (levels A, B and C) depending on the desired sound quality.

In level A (stereo mode), the sound data is arranged in every other sector in a plurality of sectors in the user area of the track. That is, each sector of the track is divided into two channels, and the sound data is arranged in the first channel. Visual data or the like can be arranged in the second channel. This level A is a high fidelity level, for example, a level at which a sound quality equivalent to an LP record can be obtained.

In level B (stereo mode), the sound data is 4
It is arranged for each sector. That is, the user area is divided into four channels. Therefore, sound data is arranged in one of the four channels, and visual data and the like are arranged in the other one channel. This level B is a mid-high fidelity level and is for obtaining sound quality equivalent to FM broadcasting.

In level C (stereo mode), the sound data is 8
It is arranged for each sector. The track is divided into 8 channels, but only one channel is used for sound data and the remaining one channel is used for visual data. This level C is a speech level, and obtains sound quality equivalent to AM broadcasting, for example.

At any level, the number of channels in the monophonic mode is double that in the stereo mode.

However, according to the data arrangement on the CDI disk as described above, for example, at the B level, two channels are in an idle state, and there is a problem that there is much waste.

Therefore, the applicant of the present application proposed a CDI disk in which data is arranged and stored in high density in the previous application. For example, two sets of data at the B level are interleaved. It should be noted that the sound data and the visual data related thereto are a set of data. In this data arrangement, as shown in FIG. 10, the first set of sound data S11, S12, ... For the first channel and the second set of sound data S21, S22, S23 ,. ..The 1st set of visual data V1A, V1B, V1A, ...
.. The second set of visual data V2A, on the fourth channel
V2B, V2A, ... Are respectively stored.

However, as described above, the visual data V arranged in each sector together with the sound data S includes the character image data VA and the background image data VB. This character image data VA is composed of characters on a CRT screen,
This is data (image data for directly displaying characters) held as an image to be displayed. Image data for background
Similarly, as VB, there is data as an image by a dot pattern, or data as a code for a specific pattern generator.

The image data VA for directly displaying these characters and the background image data VB are displayed on the screen at the same time (superimposed), and are displayed with the sound data S in a certain temporal relationship. For example, it is a case of using as CDI karaoke.

On the other hand, in a CDI player, its CPU reads data from the CDI disk and forms an image on a CRT screen, which needs to be processed in real time.

That is, these visual data VA and VB are arranged as a real-time file of the CDI disk in the real-time file area together with the sound data S as described above.

<Problems to be Solved by the Invention> However, in addition to sound data, two types of visual data (image data for background and image data for directly displaying characters) are mixed as a real-time file based on the CDI standard. In this case, the number of unused sectors increases when trying to maintain the relation between the sound data and the visual data, and for example, the sectors used as image data for directly displaying characters are scattered, resulting in the use of sectors as a whole. There was a problem of inefficiency. This is because sound data and visual data do not always have a one-to-one correspondence.

If all image data are stored in the real-time file area as real-time files, two types of image data must be laid out while maintaining the relation (synchronization) with the sound data. There was a problem that was becoming difficult.

Therefore, an object of the present invention is to achieve high density in the data arrangement of the CDI disk and to facilitate the layout thereof.

<Means for Solving the Problems> As shown in FIG. 1, the CDI system according to the present invention is a CDI system.
A non-real-time file area that stores image data for directly displaying characters for multiple screens in a user area provided based on the standard, and a real-time file that stores background image data for multiple screens together with a series of sound data. Image data transfer means 120 for collectively transferring the image data for directly displaying the characters of a plurality of screens to the memory 110, and the CDI disk 100 in which the sound area is formed, and the sound from the real time file area. A sound data transfer unit 140 that reads out data and transfers it to the sound generator 130, and a second image data transfer unit that reads out background image data for a predetermined screen out of the background image data for the plurality of screens and transfers it to the memory 110. 150 and the image data that directly displays the characters of one stroke are extracted, and the extracted characters are extracted. The image data to be directly displayed is given priority over the background image data for one screen extracted from the background image data for a predetermined screen held in the memory 110 to create the display image data, and the character screen is displayed. Is a CDI system including an image forming unit 160 for superimposing the image on a background screen.

<Operation> In the CDI system according to the present invention, the first image data transfer means 120 collectively collects image data for directly displaying characters for a plurality of screens from the non-real time file (NRTF) area of the CDI disk 100. Transfer to the memory 110.

The sound data transfer means 140 reads the sound data from the real-time file (RTF) area and transfers it to the sound generator 130.

Further, the second image data transfer means 150 reads out the background image data for a predetermined screen (for example, one screen) from the background image data for a plurality of screens from the real-time file area RTF and transfers it to the memory 110. .

Then, the image forming means 160 extracts the image data for directly displaying the characters for one screen, and stores this image data in the memory.
The image data for display is formed by giving priority to the image data for background extracted for one screen from 110, and this character screen is superimposed on the background screen.

Therefore, only the sound data and the background image data are arranged in the real-time file area, which facilitates the layout of the data by synchronizing the data. It also makes it easy to store multiple sets of data groups on a CDI disk,
The data area is used efficiently, and high-density recording of data is possible.

<Example> Hereinafter, an example of the present invention will be described with reference to the drawings.

2 to 9 are for explaining an embodiment of the CDI system according to the present invention. In this embodiment, the system is used as karaoke.

In FIG. 2, reference numeral 21 denotes a CPU, which uses, for example, a 68000 series processor because it is necessary to perform real-time processing. A video processor (VDP) 22 sends and receives signals to and from the CPU 21, controls the VRAM 23, and forms a desired image on the display (CRT) 25 via the RGB signal generator 24.

Further, 26 is a tone generator connected to these CPU 21, VDP 22 and VRAM 23 by a bus, and outputs a predetermined sound generation signal based on sound data to a sound system.
Supply to 27. The sound system 27 is composed of, for example, an amplifier and a speaker.

28 is an input / output device (I / O), such as a keyboard (K
The external input from BD) 29 is output to CPU 21.

Reference numeral 30 is an interface of the CDI player, which is connected to the bus. Reference numeral 31 is a working RAM which is also connected to the bus. 32 is a CDI disk.

In FIG. 3, one spiral track 33 is designed on the surface of the CDI disk 32 based on the CDI standard. That is, a plurality of pits are spirally arranged as one track. Therefore, in the CDI disk 32, data is recorded in a spiral shape in the clockwise direction in the figure from the inner side to the outer side in the radial direction (depending on the presence or absence of pits).

Then, the track 33 is scanned by the CDI player having the above configuration.

On the track 33, a disc label area A and a data area (user area) B are defined based on the CDI standard. The data area B is composed of a plurality of sectors (blocks).

The disc label area A is composed of a file table and the like. For example, the start addresses of a plurality of files (data groups) are recorded.

The data area B is a non-real-time file area B1 for storing image data for directly displaying characters for multiple screens and a real-time file area for storing background image data for multiple screens together with a series of sound data. It is divided into B2 and. The image data that directly displays the characters stored in the non-real-time file area B1 is read by the CPU 21 and, for example, 1
Songs (for multiple screens) are collectively transferred to the VRAM (memory) 23.

On the other hand, the sound data and the background image data stored in the real time file area B2 are processed in real time by the CPU 21 as a real time file.

The total amount of data that can be recorded in this 1 sector is 23.
It is 52 bytes. Then, the character of the user data can be designated for each sector. According to the CDI standard, the structure of this 2352-byte data is (Form 2
When dealing with sound data), sync 12 bytes, header 4 bytes, subheader 8 bytes, user data 2304 bytes, spare 20 bytes, reserve 4 bytes. A signal for dividing the sector is recorded in the sync. Address data and form data are recorded in the header. In addition, the subheader consists of 2 bytes for file, 2 bytes for channel, 2 bytes for submode,
The data type consists of 2 bytes.

As shown in FIG. 3, the non-real-time file area B1 stores image data for directly displaying characters for a plurality of screens.

The image data for directly displaying the background is based on a method called delta YUV and is sampled with a luminance signal (Y) and a color difference signal. In this data,
Raw data is stored in the first two dots assigned to the beginning of each line of one screen, while the following dots are displayed by the deviation from the data of the first two dots.

On the other hand, FIG. 5 uses a CLUT (color lookup table, color correspondence table) as image data for directly displaying this character.

At the beginning of the data for one screen, a color lookup table, that is, a correspondence table in which the ratio of RGB is shown by color number is stored, and the data shown by this color number is stored below. In this case, unless the CLUT is changed in the middle of the data, this CLUT is not stored until the data for the next screen. Then, when the color code data is read, the RGB signal is created by referring to the CLUT.

FIG. 6 shows an example in which three sets of data groups (files) consisting of sound data and visual data (background image data) are interleaved on the track 33 in the B level stereo mode in the CDI standard. In this level and mode, a plurality of sectors on the track 33 are divided into 4 channels and sequentially scanned in the direction of the arrow in the figure.

In each sector of the first channel represented by sector numbers 1, 5, 9, ..., For example, a tone forming signal S11 of one music which is sound data of the first group (file), S12, S13, S14, ..., S1m are sequentially (regularly) arranged. Also, sector number 2,
In each sector of the second channel represented by 6, 10, ..., Musical tone forming signals S21, S22, S23, S24 of another music which are the sound data of the second group (file),・
..... S2m are sequentially arranged. Further, sound data S31, S32, S33, S34, ..., S3m of the third music piece are sequentially arranged in the third channel (sectors 3, 7, 11, ...). The reason why the sound data is regularly arranged in these three channels is that these sound data need to be read out at regular intervals at regular intervals in order to form one piece of music as the tone forming signal. .

Further, in each sector of sector numbers 4, 8, 12, 16, ... (Channel 4), the first group of background image data V1 corresponding to the first group of sound data S1,
Similarly, background image data V2 and V3 respectively corresponding to the second and third sound data S2 and S3 are arranged in a mixed manner. In this case, the first background image data V1, ... Is image data serving as a background image for the sound data S1 of the first music, and the second background image data V2, ... Is the second music. This is image data that is a background image for S2.
V3 is background image data corresponding to S3. In this way, the background image data V1, V2, and V3 related to the sound data S1, S2, and S3 have the same channel number. The channel numbers 1, 2, and 3 are recorded in the sub-header portion in each sector.

In addition, the image data (for example, three types of data of V1B, V2B, and V3B) that directly displays the characters to be superimposed on the screen with respect to the background image data V1, V2, and V3 is stored in the non-real time file area. It is stored. These image data include, for example, CLUT and delta YUV data, run length data, and RGB signal data.

Further, as shown in FIG. 6, in the B level mode, since the background image data V1, V2, V3 of three groups are densely mixed in the channel 4 sector, the data density can be increased. I was able to achieve it. The reason for mixing them in this way is that the sound data and the background image data do not always have a one-to-one correspondence. Also, the amount of data varies depending on the music. For example, the background image data of 30 screens is required for the song S1, whereas the data of 40 screens is required for that of the song S2.

FIG. 7 shows the memory space of the VRAM 23 for storing the data transferred from each area of the CDI disk 32 as described above.

As shown in this figure, in the VRAM 23, the non-real time file NRTF is stored in a certain range from a specific address. In this NRTE area, image data for directly displaying characters on a plurality of screens, for example, screens corresponding to the number of screens for one song in the example of FIG. 6 is transferred and stored. In addition to this NRTF storage area, this RVAM23 also has an editing area, in which two overlapping screens can be switched by cutting (switching by addressing). Image data to be displayed (plane 01), background image data for one screen (plane 11), image data for directly displaying characters for one screen (plane 02), background image data for one screen (plane 1)
It has each divided area of 2).

Therefore, it is assumed that the first data group (for example, the first music piece) is selected when the track 33 of the CDI disc 32 is scanned by the CDI player. At this time, in the real-time file area, the channel number is read from the sub-header of each sector to determine the content of the data, and the sound data S11, S12, ... Are sent to the audio processor in order and the background image is displayed. Data (natural image)
V1, ... Is sent to VRAM23.

Further, the image data for directly displaying the characters in the non-real-time file area is sent to the VRAM 23 all at once. As a result, the music, background image and lyrics (characters)
This is what you get in VRAM23. At this time, the data S2 and V2 of the second group and the data S3 and V3 of the third group are skipped and scanned.

FIG. 8 is a flowchart showing the procedure of reading and writing data from the CDI disk 32 in the CPU 21.

First, it is checked for each sector whether the data is a non-real time file NRTF (step S801). NRTF
If it is (image data for directly displaying characters), that data is written to an empty address in VRAM 23 (step S8
02). The start address and the written capacity are held in the register.

If the file is not a non-real-time file, the variable i is initialized to 1 (step S803) and the variable j is set to 1 or 2.
(Step S804).

Next, read the data from the sector (step S805),
It is checked whether it is suspended data (step S806). If it is the sound data, it is transferred to the tone generator 26 (step S807), and if it is not the sound data, it is the image data, that is, the image data for the background. Therefore, the plane (11 or 1
Write the real-time file RTF data to 2) (step S808). As shown in FIG. 7, a plane 11 and a plane 12 which are background screens are created.

Then, by writing in the plane in this way, it is checked whether or not unused data for two screens is held in the RAM (plane 11 and plane 12) (step
S809).

Until the data for two screens are retained, reading from the sector, data discrimination, and writing are repeated (S805 to S809
Loop), and when held, the CPU 21 enters a wait state (step S810). Then, when this wait state is released by, for example, an interrupt input from the VDP 22 (YES in step S811), the process loops until one song ends (NO in step S812 returns to S805).

As described above, the CPU 21 has the VRAM 23 as shown in FIG.
The image data for directly displaying the characters for a plurality of screens, the background image data for one screen to be displayed first, and the image data for one screen to be displayed next are sequentially transferred (written) to the empty area of. .

Figure 9 shows data editing and RGB in VRAM23 in VDP21.
6 is a flowchart showing a procedure of transmitting image data to the display 25 via the signal generator 24.

First, in the VDP 22, the CPU 21 constantly checks whether it is in the wait state (step S901). If it is in the wait state (depending on the status or the like), first, the plane specifying variable i is set to 0 (step S902), and the plane 01 is created in the VRAM 23 (step S903). As shown in FIG. 7, the image data for directly displaying the characters for one screen is stored in the specific area (plane 01) from the area storing the NRTF.
Write in. Similarly, a plane 02 composed of image data for directly displaying characters is created (step S90).
Four). At the time of this writing, the variable j is set to 1 or 2.

Next, it is checked whether j is an odd number (step S905),
If it is an odd number (j = 1), the planes 01 and 11 are superimposed (superimposed) in this order (step S906). This image surface priority is programmatic.

If it is even (j = 2), the planes 02 and 12 are displayed in this order (step S907). Then, the RGB signal is generated by the RGB signal generator 24, and these superimposed images are transferred to the display 25 (step S908).
In this RGB signal generator 24, when the image data for directly displaying characters is DYUV (Fig. 4), a character display screen is directly created based on the data from planes 01 and 02. , CLUT (FIG. 5) is created by referring to CLUT.

Next, the variable i is incremented (step S909), and CP
Notify U21 of the empty plane (i) (step S91)
0). Then, the weight of the CPU 21 is released (step S91
1), return to step S901.

As shown in the above flow chart, two sets of two display screens, a character image and a background screen, are edited in VRAM23,
By changing the address, it is possible to instantly switch and display. Further, when these screens are uttered as musical tones of sound data, the display is updated based on the progress thereof. For example, it is convenient to use it as karaoke.

<Effect> As described above, according to the present invention, the sound data and the background image data are arranged in the real-time file area, and the image data for directly displaying the characters are separately arranged in the non-real-time file area. Because
Even when arranging the sound data and visual data (image data for background, data for directly displaying characters) of multiple groups, the sector usage efficiency becomes high, and high-density data arrangement is possible. it can. In addition, since the image data for background and the image data for directly displaying characters are arranged in different areas, the work for incorporating a data array program for high density data arrangement becomes extremely easy. Is.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a CDI system according to the present invention, FIG. 2 is a block diagram showing a schematic configuration of an embodiment of a CDI system according to the present invention, and FIG. A plan view showing the track structure of the CDI disk.
FIG. 4 is a data format diagram showing sectors of a CDI disk according to one embodiment, FIG. 5 is a data format diagram when other types of data are stored, and FIG. 6 is each of the CDI disks according to one embodiment. FIG. 7 is a diagram showing a data array for each sector, FIG. 7 is a memory map similarly showing an address space of a memory (VRAM) according to one embodiment, and FIG. 8 is a flowchart showing a control program in a CPU according to one embodiment.
FIG. 9 is a flowchart showing a control program in the VDP according to the embodiment, and FIG. 10 is a data layout diagram of the CDI disk according to the prior application. 21 …… CPU, 22 …… VDP, 23 …… VRAM, 24 …… RGB signal generator, 25 …… Display, 27 …… Sound system, 100 …… CDI disk, 110 …… Memory, 120 …… First image Data transfer means, 130 ... Sound generator, 140 ... Sound data transfer means, 150 ... Second image data transfer means, 160 ... Image construction means.

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display area H04N 5/91 5/92

Claims (1)

[Claims] 1. A non-real-time file area for storing image data directly representing characters for a plurality of screens in a user area provided based on the CDI standard, and a series of sound data for background image data for a plurality of screens. CDI that forms the real-time file area to be stored with
A first image data transfer means that includes a disk and collectively transfers the image data directly representing the characters of a plurality of screens to the memory, and a sound data transfer means that reads the sound data from the real-time file area and transfers it to the sound generator. A second image data transfer means for reading out the background image data for a predetermined screen from the background image data for the plurality of screens and transferring it to the memory; and extracting the image data directly representing the characters for one screen. , The image data for directly representing the extracted character is prioritized over the background image data for one screen extracted from the background image data for a predetermined screen held in the memory, and the display image data is given. And a image composing means for superimposing a character screen on a background screen, and a CDI system.