KR970002862B1 - Disk recording medium and its reproduction method and apparatus - Google Patents

Abstract

The device for the reproduction of the record media(200) is structured to be capable of interchanging with the existing CD disk and is composed of CD reproduction device(200), decoding device(600), control processor(300), buffer memory(400), and signal converter(500). During the operation, the CD reproduction device(20) receives an address information and provides CD reproduction signal to the decoding device(600), outputs an error which is detected and error-corrected data to the control processor(300). The control processor receives and keeps the data index table signal and the program index table signal to stay at the 1st and the 2nd area of the memory method(400).

Description

Disc recording medium and its playback method and apparatus

1 is a diagram showing a data structure of a Q subcode channel of a compact disc.

2 is a diagram showing an example of a content table of a Q subcode channel according to the present invention.

3 is a diagram for explaining a track configuration of a program area of a compact disc according to the present invention.

4 is a view showing an example of the data index table of FIG.

5 is a diagram showing an example of the program index table of FIG.

6 is a flowchart showing an example of a disc playback method according to the present invention.

7 is a block diagram showing the structure of a disc reproducing apparatus according to the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc recording medium, a method and apparatus for reproducing the same, and more particularly to a compact disc (hereinafter referred to as CD) system.

CD is a recording medium that can store optically modulated digital data signal on a disc with a diameter of 12cm with a large capacity (up to 800M bytes). Audio CD-DA containing digital audio data, digital audio data, text data and graphic data. CD-G and CD-EG, which provide not only audio but also lyrics and graphic backgrounds, and CDVs that contain digital audio and video data. There are also CD-ROMs for recording computer data and using them in databases, electronic publishing, and the like, and CD-Is for recording audio, video, text, and computer data for multimedia and the like. The physical recording format of such CDs is based on the recording format of CD-DA. The data recording area of the CD is roughly divided into a lead-in area LIA, a program area PMA, and a lead-out area LOA. The CD-DA records the digital audio data signal in the PMA and the program's time contents, or "table of contents" information, in the LIA. Therefore, the CD player reads the table of contents recorded in the LIA prior to the playback, seeks the selected program, and plays the program. The LIA has eight subcode channels called P, Q, R, S, T, U, V, and W. The table of contents information uses the Q channel and displays the number and time of up to 99 programs from 1 to 99. CD-G adds a graphic function that displays karaoke lyrics and song images using R-W subcode channels not used in CD-DA. Since such CD-DA or CD-G installs the PN4A program by referring to the contents of the LIA, the number of programs that can be included in the PMA is limited. For example, since the maximum capacity of one CD is 800M bytes, 100K bytes of still pictures can be recorded. Therefore, 8,000 catalog information cannot be included in the LIA. The CD-ROM and CD-I reconstruct and record or process an audio data block composed of 98 frames, which is a data processing unit of the CD-DA, in sector units. The CD-ROM driver is connected to a host computer (personal computer) and performs playback operation dependently by a CD-ROM operating program mounted on the hard disk or floppy disk of the host computer. Therefore, the CD-ROM has to use a specific host computer, and compatibility between systems is inevitably required, so it is limited to dissemination in each home. In order to make up for the shortcomings of the CD-ROM, the CD-I is equipped with a computer, a character reproducing circuit, an image reproducing circuit, an audio reproducing circuit, and a computer data reproducing circuit in a CD-I reproducing apparatus. It is solved. In other words, the CD-I system is a reproduction-only computer in which the hard disk or floppy disk of the computer is replaced with the CD-I disk. Such a CD-I system can access virtual data only by applications stored on disk in an operating system environment, which is almost the same as a computer. Therefore, specific OS and applications are inevitably required. This has the drawback of raising the cost. In addition, it is inconvenient that a computer cannot directly access a data location stored on a disk, but must be accessed through an OS or an application.

SUMMARY OF THE INVENTION An object of the present invention is to provide a disc recording medium having a new CD recording format that can contain a large amount of programs in order to solve the above problems of the prior art.

Another object of the present invention is to provide a disc reproducing method and apparatus for directly accessing and reproducing program data from the disc medium.

Another object of the present invention is to provide an inexpensive disc playback system.

A disc recording medium of the present invention for achieving the above object comprises: a disc recording medium having a lead-in area, a program area and a lead-out area, the program area comprising: a first track carrying a plurality of data signals having different indices; A second track comprising a plurality of programs having different indices and an index combination of at least one or more data signals among the data signals; A third track containing a data index table consisting of indexes of the respective data signals and initial address information; And a fourth track including a program index table including indexes of the programs and initial address information, wherein the lead-in area includes a plurality of different tracks specifying initial positions of the tracks of the program area and the lead-out area. It is characterized in that it contains a contents table consisting of a pointer and initial address information.

In the method of reproducing the disc recording medium of the present invention, the disc recording medium has a lead-in area, a program area, and a lead-out area. Obtaining the second address information, reading the data index table and the program index table from the first and second tracks of the program area according to the obtained first and second initial address information and storing them in the first and second memory areas; Reading a data index order signal of a corresponding program from a third track of the program area according to the obtained index of the selected program and initial address information, and storing the data index order signal of the corresponding program in a third memory area; Acquiring initial address information of the data index sequentially from the data index table stored in the first memory area according to the data index order signal stored in the third memory area; And reading out the corresponding data signal from the fourth track of the program area according to the obtained initial address information of each data signal, and processing and reproducing the read data signal.

In a disc reproducing apparatus for picking up and reproducing a data signal from a disc recording medium, the disc recording medium according to the present invention is characterized in that the disc and the pickup means decode the picked-up signal while tracking servo control according to the address information. CD reproducing means for outputting a CD reproducing signal and generating a program selection signal according to a key input, and decoding means for receiving the CD reproducing signal, descrambles and corrects errors, and outputs decoded data; Memory means for storing a data index table, a program index table, and a data index order signal in the first to third areas, respectively; Inputting the data output from the decoding means to supply data and program index table signals and data index order signals to the first to third regions of the memory means and output reproduction data signals, and program selection signals of the CD reproducing means. A control processor for supplying initial address information of the corresponding program and data track to the CD reproducing means with reference to the data and program index signal and data index order signal; And signal conversion means for inputting a reproduction data signal of said control processor to convert it into a predetermined signal to generate a reproduction output signal.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The disc recording medium of the present invention has a lead-in area (LIA), program area (PNIA), and lead-out area (LOA) as in the case of a conventional CD-DA disc. FIG. 1 shows a data structure of a Q channel in the LIA. . A 98-bit Q-channel data structure consisting of twice the channel bits of eight channels of P, Q, R, S, T, U, V, and W of 98 frames consists of 96 bits except the first 2 bits of sync bits. There are 72 bits of data bits followed by 4 bits of control bits and 4 bits of address bits. Data bits include 8-bit track number code (TNR), 8-bit pointer, 24-bit address (minutes, seconds, frame), 8-bit interval bit (Zero), 24-bit pointer address (PMIN, PSEC, PFRAME). It is composed of After the data bit, there is a 16-bit CRC code. In LIA, the track number code (TNR) of the Q channel is a decimal "0". In the LIA, the contents of the contents recorded on the disk, that is, the contents table (TOC) are recorded. The TOC consists of a pointer and a pointer address of the Q channel. The pointer address indicates the minutes, seconds, and frame values of the start point of each program of the PMA having a specific track number.

2 shows an example of the TOC according to the present invention. When the pointer value is "1", the minute data of the PMIN indicates the start address of the data index table track. When the pointer value is "2", the minute data of PMIN indicates the start address of the program index table track. When the pointer value is "3", the PMIN minute data indicates the start address of the data signal track. When the pointer value "4", the PMIN minute data indicates the start address of the program track. When the pointer value is "5", the PMIN minute data indicates the start address of the warning CD-DA track. When the pointer value is "A0", the PMDT indicates the first track number in the program area. When the pointer value is "A1", the PMIN indicates the last track number in the program area. When the pointer values "A0" and "A1", the data of PSEC and PFRAME indicate the data coding method of the data signal track. When the pointer value "A2", the minute data of the PMIN indicates the start address of the LOA. Therefore, as described above, the TOC structure of the present invention is configured differently from the TOC structure of the conventional CD system.

Referring to FIG. 3, the program area PMA of an embodiment according to the present invention is largely divided into a data index table track, a program index table track, a data signal track, a program track, and a warning CD-DA track. The start position of each track is indicated by the pointer of the TOC as described above. In the data signal track, predetermined data signals D _{1 to} D _n of basic units constituting the program are recorded. For example, if the data signal is n pieces of still picture data signals, it is divided into units of chapters, and each of the still picture data signals has a predetermined index and initial address information. One still picture data is 384 × 240 × 2 bytes in the DYUV coding method, so it corresponds to about 40 sectors when composed of MODE2 FORM2 sectors. In the case of RGB555 coding method, since it becomes 384 x 240 x 2 bytes, when it consists of MODE2 FORN12 sectors, it corresponds to about 79 sectors. Therefore, each unit size of the data track varies depending on the type of data, the coding scheme, and the configuration mode. Here, the data signal is composed of not only still data but also sound source data or font data, and a combination thereof is also possible. A table of contents table signal of the data signals is recorded. 4 shows an example of the data index table. When the data index is "1", minutes, seconds, and frame data indicate the absolute elapsed time from the start point of PM4A to the start point of the data signal D1 as initial addresses. . In the program track, a plurality of programs consisting of an index order combination of at least one data signal is recorded. Each of the programs PM1 to PMm is composed of index data of each data signal constituting the program. For example, if one program is composed of three still pictures, it can be indicated by sequentially recording the index information of the still pictures according to the order in which the still pictures constitute the program. In the program index table track, a table of contents table signal of programs configured by collecting only the respective indexes and initial address information of the above-described programs is recorded. 5 shows an example of a program index table. When the program index is "1", the minutes, seconds, and frame data represent the initial elapsed time from the beginning of the PMA to the beginning of the program PM1. Warning The CD-DA track is intended to deliver a warning message when the disc recording medium of the present invention is played back by a conventional CD-DA reproducing apparatus. For example, "This disc is a SAMSUNG CD-K disc. "You must have KPLAYER." Data recorded on the disc of the present invention can be recorded in the MODE0, MODE1, MODE2 format of the CD-ROM and the MODE1, MODE2 FORM1, MODE2 FORM2 format of the CD-I.

As described above, the disc recording medium of the present invention does not record all the data signals constituting the program for each program, but records the basic data signal elements constituting all the programs in a separate track, and each program is a sequence of these data signal elements. By configuring the indexes according to the combination, the amount of redundant data can be eliminated, so that more programs can be stored on one disk, and the table of contents of many programs can be recorded by writing a table of programs and data to the PMA.

Referring to Fig. 6, a method of reproducing data from a disc recording medium according to the present invention will be described.

First, at the beginning of playback, the TOC is read to the LLA (step 100) to check whether the CD-K disc according to the present invention (step 101), and if not the CD-K disc, the disc playback process is performed. In the case of the CD-K disc, the TOC obtains the initial address value of the data index table track and the initial address value of the program index table, reads the data index table of the PMA (step 102), and then reads the program index table (step 103). When the user selects a desired program (steps 105 and 106), the index of the selected program is found by referring to a program index table to obtain an initial address value of the corresponding program index. The program is read into the PMA based on the initial address value of the obtained program (step 108). Subsequently, the initial address value of the data signal is found in the data index table according to the data index order contained in the read-out corresponding program, and the corresponding data signal is sequentially read from the data signal track of the PMA according to the initial address value of the obtained data signal. Step 109). The read-out data signal is converted into a dot output signal, processed to be reproduced and output (step 110), and step 110 is repeated until the last data signal of the program is reproduced and outputted. The flow returns to step 105 and waits for selection of the next program (step 111).

According to the reproduction method of the present invention, it is possible to know in advance where the data signal in the program is located on the disc. Therefore, the next data signal can be read in advance and waited at the time of outputting the current data signal, thereby accessing the reproduction signal reproduced and output from the disc. Time can be run at high speed, and microcomputer or processor knows data location through table, so there is no need for separate OS or application program.

Referring to FIG. 7, the reproducing apparatus for reproducing a disc recording medium according to the present invention is configured to be compatible with an existing CD disc. The disc reproducing apparatus of the present invention comprises a CD reproducing means 200, a decoding means 600, a control processor 300, a buffer memory 400 and a signal converting means 500. The CD reproducing means 200 picks up the optically modulated data signal from the disc 10 via the pickup means 210, decodes it in the DSP means 231, outputs the decoded CD data signal, and inputs the key input means 240. It generates the program selection signal according to the key input through the microcomputer 233 and has the same configuration as the existing CD player. The servo means 232 performs a tracking servo of the spindle motor 220 and the pickup means 210. The decoding means 600 receives the CD playback signal and descrambles it, and then outputs data by performing a predetermined error detection and error correction on the obtained signal. The decoding means 600 is for decoding the data signal of the data recording format according to the present invention from the CD playback signal. The control processor 300 outputs data and a program index table signal from the input data, and transmits initial address information of the data and program tracks to the microcomputer 233 in response to the program selection signal transmitted from the microcomputer 233, Outputs the data signal of the program. The memory means 400 stores the data index table signal in the first area, the program index table signal in the second area, and stores the data index order signal of the selected program in the third area. The signal converting means 500 converts and outputs the data signal sequentially read out by the data index order signal into a predetermined reproduction output signal for supplying to the output device. The signal converting means 500 may include at least one of an image reproducing means, a voice reproducing means, and a font reproducing means according to the data type.

As described above, when the playback apparatus of the present invention attempts to play the CD-K disc of the present invention, the CD playback means 200 first reads the TOC from the LIA of the disc 10, obtains predetermined address information, and obtains data according to the obtained address information. The index table track and the program index table track are read in sequence to supply the CD playback signal to the decoding means 600. The decoding means 600 inputs a CD playback signal, descrambles the error, detects and corrects an error, and outputs the decoded data to the control processor 300. The control processor 300 obtains the data index table signal and the program index table signal among the data and resides in the first area and the second area of the memory means 400. When the user selects a predetermined program through the key input means 240, the microcomputer 233 displays this on the display means 250 and supplies a program selection signal to the control processor 300. The control processor 300 inputs a program selection signal to obtain initial address information of the corresponding program by referring to the program index table residing in the second area of the memory means 400. When the obtained address information is supplied to the microcomputer 233, the microcomputer 233 reads the program by seeking the corresponding program track according to the given address information. The read program signal is transmitted to the control processor 300 through the DSP 231 and the decoding unit 600, and the control processor 300 converts the signal into the data index order signal of the program. Save to the area. Subsequently, the control processor 300 obtains the initial address of the data signal in order by referring to the data index table of the first area according to the data index order signal stored in the third area, and transmits the initial address of the data signal to the microcomputer 233. Controls the pickup means 210 and the servo means 232 to pick up the corresponding data signals from the data signal tracks and transfer the data signals obtained through the DSP 231 and the decorning means 600 to the control processor 300. . The control processor 300 processes the supplied data signal and supplies it to the signal converting means 500. The signal converting means 500 converts the input signal into a reproduction output signal and outputs the converted signal.

As described above, the playback apparatus of the present invention can know the position of the data signal of the disc in advance in the microcomputer and the control processor, so that the next signal can be picked up and waited in advance when the current signal is output, so that the output access time can be performed at high speed. . In addition, since the playback system does not need to have a separate operating system, the production cost can be lowered and existing CD-DA discs can be played.

As described above, the present invention can store more programs on a single disk, thereby maximizing disk storage efficiency and providing fast access because the microcomputer and processor can know the data address directly on the disk without a separate operating system environment. It is economical because it can lower the production cost.

In addition, according to the present invention, the data signal can be configured for each still picture group, sound source group, and font group, and the program can be configured in an ordered combination of data signals read out from these three groups, thereby satisfying various programs in each application field. That is, the entertainment field of game programs, karaoke programs, and music programs, educational fields such as interactive educational programs, animation equalization programs, electronic publishing fields such as electronic dictionaries, electronic magazines, electronic books, product catalog propaganda programs, It can be applied to fields such as tourist information program and portable electronic map program. In other words, by securing the defects of the existing CD-ROM and CD-I has a very advantageous advantage in that it is possible to embed more various programs on a single disk and to supply at a lower cost.

Claims (23)

A disc recording medium having a lead-in area, a program area and a lead-out area, the program area comprising: a first track carrying a plurality of data signals having different indices; A second track comprising a plurality of programs having different indices and an index combination of at least one or more data signals among the data signals; A third track containing a data index table consisting of indexes of the respective data signals and initial address information; And a fourth track including a program index table including indexes of the programs and initial address information, wherein the lead-in area includes a plurality of different tracks specifying initial positions of the tracks of the program area and the lead-out area. And a contents table comprising a pointer and initial address information. The disc recording medium according to claim 1, wherein each data signal is a still data signal. The disc recording medium according to claim 1, wherein each data signal is a sound source data signal. 2. The disc recording medium according to claim 1, wherein each data signal is a font data signal. The disc recording medium according to claim 1, wherein the first track includes at least two data signal groups of still, sound, and font data signal groups. 6. The disc recording medium of claim 5, wherein the third track comprises at least two data index tables corresponding to the at least two data signal groups. 8. The disc recording medium as claimed in claim 7, wherein each program comprises a sequence combination of indices of at least one data signal of the at least two data signal groups. 2. The disc recording medium according to claim 1, wherein said program area further comprises a fifth track on which a warning message is carried. 9. The disc recording medium of claim 8, wherein the warning message complies with the CD-DA recording format. 2. The disc recording medium as claimed in claim 1, wherein the content table further comprises a data signal indicating a coding method of the data signal. The disk recording medium according to claim 2, wherein the still image data signal is recorded in a combination of at least one of MODE1, MODE2 FORM1, and MODE2 FORM2 methods of CD-I. 3. The disc recording medium according to claim 2, wherein the still image data signal is coded by DYUV coding. The disc recording medium according to claim 2, wherein the still picture data signal is coded by RGBnnn (n is the number of coding bits) coding method. The disc recording medium according to claim 1, wherein the data signal is a graphic picture data signal coded by a color lookup table coding method. The disk recording medium of claim 1, wherein the data signal is an animation screen data signal coded by run rank coding. 4. The disc recording medium of claim 3, wherein the sound source data signal is a MIDI data signal. A method of reproducing a disc recording medium having a lead-in area, a program area, and a lead-out area, the method comprising: reading a content table from a lead-in area of the disc at the beginning of reproducing to obtain first and second address information; Reading the data index table and the program index table from the first and second tracks of the program area according to the first and second initial address information and storing the data index table and the program index table in the first and second memory areas; Reading a data index order signal of a corresponding program from a third track of the program area according to the obtained index and initial address information of the selected program, and storing the data index order signal in a third memory area; data index order stored in the third memory area; Acquiring initial address information of a data index sequentially in accordance with a signal from a data index table stored in the first memory area; And reading out the corresponding data signal from the fourth track of the program area according to the obtained initial address information of each data signal, and processing and outputting the read data signal. A disc reproducing apparatus for picking up and reproducing a data signal from a disc recording medium, wherein the disc and pickup means are subjected to tracking servo control according to address information to decode the picked-up signal and output the decoded CD reproducing signal according to a key input. CD reproducing means for generating a selection signal; Decoding means for receiving the CD playback signal, descrambled, error corrected, and outputting decoded data, memory means for storing a data index table, a program index table, and a data index sequence signal in first to third regions, respectively; Inputs the data output from the means to supply data and program index table signals and data index order signals to the first to third regions of the memory means and outputs reproduced data signals, in accordance with the program selection signal of the CD reproducing means. A control processor for supplying initial address information of the corresponding program and data track to the CD reproducing means with reference to the data and program index signal and data index order signal; And signal conversion means for inputting a reproduction data signal of said control processor, converting it into a predetermined signal, and generating a reproduction output signal. 19. The disc reproducing apparatus as set forth in claim 18, wherein said reproduction data signal is a still image data signal and said signal changing means comprises image reproducing means for converting said still image data signal into a video signal. 19. The disc reproducing apparatus as set forth in claim 18, wherein said reproducing data signal is a sound source data signal, and said signal converting means includes voice reproducing means for converting said sound source data signal into a voice signal. 19. The disc reproducing apparatus as set forth in claim 18, wherein said reproduction data signal is a character data signal, and said signal conversion means includes character image reproduction means for converting said character data signal into an on-screen display signal. 19. The apparatus of claim 18, wherein the reproduction data signal includes at least two or more of still images, sound sources, and text data signals, and the signal conversion means includes at least two or more of a video reproducing means, a voice reproducing means, and a text image reproducing means. Disc playback apparatus characterized in that. 20. The disc reproducing apparatus as set forth in claim 19, wherein said still image data signal is an RGBnnn (n is number of coding bits) coded signal, and said signal conversion means comprises digital analog conversion means.