KR100228477B1 - Multi session disc and high speed access method - Google Patents

Abstract

[Technical field to which the invention described in the claims belong]

Disc structure for fast access to discs in multisession mode and recording and reproducing method for such a structure

[Technical Challenges to Invent]

When recording a disc in the multi-session mode, the total TOS area is allocated to the inner circumferential position between the PAM area and the lead-in area of the first session, and the TOS information of each session is sequentially recorded in the total TOS area. In the reproducing mode, the TOC information of the total TOC region is sequentially accessed at high speed to reproduce the selected data.

[Summary of the solution of the invention]

The disc recorded in the multi-session mode is located in the inner circumference of the disk and is set in the inner circumference between the PM area and the lead-in area of the first session and stores the position information of each session in the recording mode. After completion of recording, a total Tiocy area for sequentially storing position information recorded in the lead-in area of each of the sessions, and the total Tiocy area are allocated in the circumferential direction of the disc, and each of the lead-in area, program area and A disk having a total TOS area comprising a plurality of sessions having lead-out areas and each having a position set in the recording mode, and sequentially storing position information recorded in the lead-in areas of the respective sessions. In the recording mode, the TioC information of each session is sequentially recorded in the total TioC area. High-speed access to the beams sequentially reproduces the selected data.

[Important Uses of the Invention]

The disk in the multisession mode can be accessed at high speed.

Description

Multi Session Disks and Fast Access Methods

1 is a diagram showing the configuration of a compact disc recorder for recording and reproducing data on a disc.

2 is a diagram showing a recording format of a single session disc.

FIG. 3 is a diagram showing a multitrack configuration on a single session disc having the same configuration as in FIG.

4 is a diagram showing a recording format of a multi-session disc.

FIG. 5 is a diagram showing a multi-track configuration on a multi-session disc having the same configuration as in FIG.

6 shows a layout of a conventional blank CD-R disc.

7 shows a layout of a blank CD-R disc according to the present invention.

8 is a flowchart illustrating a process of performing a multi-session recording mode according to the present invention.

9 is a flowchart illustrating a process of playing a multisession disc according to the present invention.

The present invention relates to a multi-session disc and an access method, and more particularly, to a method of recording and reproducing a multi-session disc structure and a multi-session disc so that information of the multi-session disc can be accessed at high speed.

In general, a compact disc (hereinafter referred to as a CD) refers to a disc that can be permanently reproduced after recording data once. A system for recording data on such a CD is called a compact recordable system (CD-R), which is implemented by installing a CD recorder on a personal computer.

Such a CD is a recording medium and records data in many kinds of formats. The main formats of recordable CD-Rs include CD-DA (Compact Disc-Digital Audio: audio CD), CD-ROM (Compact Disc Read Only Memory format), and CD-I (Compact Disc-Interactive). Depending on the ability of the authoring software to record to CD-ROM / XA (CD-ROM Extended Architecture), etc., there are various support environments and supported formats. Early CDs were mainly CD-DA for Audi, which used a single session multitrack recording method. Recording is limited to a maximum of 99 tracks. This limit is limited to 99 tracks, up to the number of recordable tracks, up to multi-session multi track recording since the introduction of KODAK Photo CD.

1 shows a block configuration of a general CD-R system. The recording / reproducing section 111 for recording and reproducing data on a disc is provided with a mechanism such as a pick-up capable of mounting a disc to be recorded and a disc to be reproduced and recording and reproducing data on the mounted disc. The recording / reproducing section 111 detects the start address of the program area of the next track or session from the lead-in area on the inner circumference and transfers the optical pickup to the location. To detect the signal from the program area. The data processing unit 112 receives the data to be recorded, codes the data in a recording format, and outputs the data to the recording / reproducing unit 111. The data processing unit 112 decodes and reproduces the reproduction data output from the recording / reproducing unit 111 in the original data format. . The storage unit 114 may be mounted inside or outside the system as a main storage device of the CD-R. The storage unit 114 temporarily stores data to be recorded or temporarily stores the reproduced data. The storage unit 114 may be a hard disc mounted in a computer. The system controller 113 controls the overall operation of the CD-R. Therefore, the system controller 113 stores a program for performing overall operations of the CD-R. The system controller 113 accesses the data to be recorded in the storage unit 114 in the recording mode and outputs the data to the data processing unit 112, and temporarily stores the reproduced data output from the data processing unit 112 in the reproducing mode.

2 shows the layout of the CD recorded by the single-session recording method, which is largely a lead-in area LIN, a program area PGM, and a lead-out area. It is divided into three areas of LOT.

FIG. 3 shows a table of contents (TOC) which is location information of data recorded on a single session CD divided into regions as shown in FIG.

4 shows the layout of a CD recorded by the multisession recording method. In a multi-session, each session is composed of a lead-in area, a program area, and a lead-out area, and these sessions are composed of a plurality of sessions and recorded on a CD.

FIG. 5 shows a TOC which is location information of data recorded on a multisession CD divided into regions as shown in FIG.

FIG. 6 shows the structure of a disc when using the multisession recording method in a conventional CD.

Looking at the conventional recording method with reference to the above-described configuration, according to the recording format of the CD as shown in FIG. 1, the recording software (authoring software) is installed in the system control unit 113, the CD-DA, CD- Record data in various disk formats, such as ROM, CD-I, CD-ROM / XA, and so on. The method of recording data on the actual CD can also be used by selecting a recording method of a single session or a multi-session recording in a plurality of sessions. Both types of recording methods allow additional recording of multitracks for each session, depending on the software's supported environment. However, whatever recording method is used, the maximum number of recordable tracks is limited to 99 tracks.

The PMA area (Program Memory Area) is an area for storing temporary TOC (Table Of Content) information of tracks recorded to the state before the finalizing CD (finalizing CD) by additional recording, and can be used up to 99 times. The term " finalizing CD " refers to information recorded on the disc such that no further recording is possible after the data recording is finished on the CD in the CD-R. Therefore, when the CD-R records up to 99 tracks, the CD-R is executed by ending CD after transferring all the data of the PMA area to the lead-in area LIN.

The lead-in area LIN is an area for storing various information of data stored in the program area PGM after the end of recording. The lead-in area LIN stores the TOC information stored in the PMA area in the state of executing the recording mode after performing the end CD. The TOC information is positional information of the information recorded in the program area PGM. Program area The PGM is an area for storing up to 99 tracks of information. The lead-out area LOT is an area allocated following the program area PGM.

The data recorded on the CD can be performed by a single session or a multisession method as described above. The program area PGM in which actual data is recorded includes one or more tracks, which are composed of a complete file structure or an audio segment that can be recorded once. The lead-in area LIN and lead-out area LOT are located before and after the program area PGM recorded in the data track group. The index of the entire track is recorded at the beginning of the inner circumference of the disc, which index is referred to as the TOC. Up to 99 tracks of data can be recorded on one CD. The concept of multi-tracks is supported on audio CDs, and the entire track on a CD is called a track. That is, when the next song is selected in the CD player, the CD player analyzes the position information of the TOC and calculates a start address of the next song. The pickup is moved to the corresponding start address position to play the selected track.

The multisession CD has a plurality of sessions as shown in FIG. Therefore, the TOC of the multisession CD has an entry corresponding to the next session in addition to the location information of its session. In general, the interval between tracks in a multisession CD is 150 physical blocks (0: 2: 0, 300 Kbytes). The interval between the first session and the second session is 11,400 physical blocks (2: 32: 0, 23 Mbytes), and the intervals between the remaining sessions other than the first and second sessions are all 6,900 physical blocks (1: 32: 0). , 14Mbyte). The interval between sessions has a structure that includes a lead-out area of a previous session and a lead-in area of a subsequent session.

In general, one of the methods of recording data on a disc is a method of recording a single session multitrack as shown in FIG. In the single session disc recording method, a mastering soft records data from physical addresses 0: 2: 0. The second track records 150 physical blocks empty from the end of the first track. After the entire track is recorded, recording end data is set. Another method is to record in a multisession multitrack as shown in FIG. 5 with a disc configuration as shown in FIG. The multisession disc recording method records a plurality of track data in each session, and records track information of the corresponding session in the lead-in area LIN of the session. In the same manner as described above, after recording all tracks up to the last session, the recording end data is recorded in the lead-in area LIN of the last session.

In the case where data is recorded on the CD by the multisession recording method as described above, the structure of the finished CD has the form as shown in FIG. The CD-ROM driver for reproducing the CD of the multisession recorded as described above sequentially checks the lead-in area of the CD when the CD is inserted to confirm the finalized session and then performs the reproducing operation. Therefore, when a CD is normally inserted into a CD player, the CD player first places the optical pickup in the lead-in area LIN1 of the first session of the innermost part of the CD, and from this, the start address of the program area PGM2 of the second session. Check. Subsequently, the pickup is moved to the program area PGM2 of the second session to check whether data is recorded. At this time, if data is read from the program area PGM2, the pickup is moved again in the inner circumferential direction of the CD to read the start address of the program area PGM3 of the next third session from the lead-in area LIN2 of the second session. Then, the pickup is moved to the program area PGM3 again and data is recorded and checked again. Therefore, in the case of playing a CD recorded with data by the multi-session recording method, the CD player checks the state of each session by repeating the above operations to the last session, the Mth session. At this time, if the end CD data is recorded in the lead-in area LINM of the Mth session, the pickup is moved to the recorded area to perform the playback operation.

Therefore, when reproducing a CD recorded with the multisession recording method, conventionally, a device for reproducing data of a multisession CD must read all TOC data corresponding to each session. In this case, the CD player reads session position information as many as the number of sessions while jumping to the lead-in areas LIN1-LINM of each session. At this time, if the number of sessions and the amount of data recorded on the CD is large, there is a problem in that it takes a lot of time to access the data because the above operation must be repeated according to the performance of the system.

Accordingly, an object of the present invention is to provide a disk structure for allocating a total TOC area including the location information of each session in a predetermined position on the inner circumference of the CD so that the apparatus for reproducing the CD recorded in the multisession can access the data at high speed. have.

Another object of the present invention is to set a total TOC area at a predetermined position in a disc in a system for recording and playing a CD recorded in a multi-session, and to record the TOC of each session in the total TOC area at the end of recording. In providing.

It is still another object of the present invention to set a total TOC area at a predetermined position within a disc in a system for recording and reproducing a CD recorded in a multi-session, and to record the TOC of each session in the total TOC area at the end of recording. In providing.

In order to achieve the objects of the present invention, a disk recorded in a multi-session mode is located on the inner periphery of the disk and stores the location information of each session in the recording mode, Set in the inner circumference between the lead-in areas and are allocated in the circumferential direction of the disc in the total thio C area for sequentially storing position information recorded in the lead-in areas of the respective sessions after the end of recording; And a plurality of sessions each having a lead-in area, a program area and a lead-out area, each of which has a position set in the recording mode.

In addition, a method of recording and reproducing data on a disc in a multisession mode includes a process of analyzing a mode, assigning a total TioCity area to a predetermined position around the disc in the multisession recording mode, and then recording the multisession. Performing a mode, accessing the location information of the corresponding session recorded in the lead-in area of each session, and sequentially storing the session information in the total TOS area; And accessing the total Tiocy information recorded in the Tiocy region and reproducing the selected data.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the same parts in the figures represent the same reference signs wherever possible.

The term " recording end data " as used herein is information (finalized CD) which is set when the recording of all data is finished in the recording mode and no further data is recorded on the CD. The CD can perform only the playback mode. The term " total TOC " refers to information for accessing data of a CD at high speed in the present invention. The total TOC is the total TOC allocated to the outermost region of the CD when the recording of the data is finished on the CD by the multisession recording method. Refers to information storing all TOCs of each session stored in the TOC area.

The configuration of the CD-R system for recording data on the CD by performing the extended mode according to the present invention has the same configuration as that in FIG. In this case, the program embedded in the system control unit 113 is executed by adding a recording mode for storing the total TOC in the total TOC area allocated to the outermost circumferential position of the CD after ending the recording mode according to the present invention.

7 is a CD layout structure diagram in which the recording mode is terminated by the multisession recording method according to the present invention. As shown in FIG. 7, the disc recorded in the multi-session mode is located on the inner circumference of the disc, and the PAM area PMA storing the location information of each session in the recording mode, and the P-M area PMA and the first session. In the total TOS area TTOC, which is set in the inner circumference between the lead-in areas LIN1 and sequentially stores the position information recorded in the lead-in areas LIN1-LINM of the respective sessions after the end of recording, and in the total TOS area TTOC. It is allocated in the circumferential direction of the disc, and is composed of a plurality of sessions each having a lead-in area LIN, a program area PGM, and a lead-out area LOT, each of which is set in the recording mode.

Here, each session 1-session M has a lead-in area LIN, a program area PGM, and a lead-out area LOT, and the TOC of the corresponding session is recorded in each lead-in area LIN. The TOC of each session stored in the lead-in areas LIN1 to LINM of each session is stored in the total TOC area TTOC.

In general, a CD is a large disk of about 600 Mbytes, and space is increased after the last lead-out area because the maximum area for the lead-in area and the lead-out area between sessions is secured, rather than recording all the data up to the last area of the physical disk. Will remain. Therefore, at the end of the recording mode, the TOCs of the sessions are sequentially recorded in the total TOC area allocated to the outermost position of the CD, which is a specific position of the lead-out area of the last session. In the reproducing mode, the total TOC recorded in the total TOC area TTOC is read to reproduce desired tracks at high speed.

8 shows the total TOC area TTOC between the PMA area of the CD and the lead-in area LIN1 of the first session in the recording mode when recording data on the disc by the multisession recording method according to the present invention. Records data in the program area PGM and at the end of session recording, records the TOC of the session and the start address of the next session in the lead-in area LIN of the session, and the session in the lead-in area LINM of the session at the end of the recording of the last session. The TOC of each session recorded in the lead-in area LIN1-LINM of all sessions is sequentially recorded in the total TOC area TTOC before recording the TOC and recording end data.

9 is a flowchart of reproducing a multisession disc according to the present invention. In the multisession reproducing mode, the TOCs of the respective sessions recorded in the total TOC area TTOC are read to check the start addresses of the sessions, and then the reproducing operation is performed.

In the present invention, when recording data on a CD in a multisession mode, after recording the session recording end and recording end data, the total TOC is recorded after the last lead-out area LOTM for high-speed access when the TOC is read in the playback mode. Allocates a total TOC area TTOC.

First, the operation of the recording mode according to the present invention will be described. First, the multisession recording mode is set, and the system controller 113 detects the recording mode in step 811 and checks whether the total TOC area is set in step 813. In this case, when setting the total TOC area TTOC, the system controller 113 sets the total TOC area TTOC after the PMA area of the CD in step 815.

Thereafter, the system controller 113 performs steps 817 and 819 to perform a recording mode of each session. Referring to the session recording operation, track data is recorded in the program area PGMi of session i currently being recorded, and TOC, which is position information of these tracks, is recorded in the PMA area. When the recording of session i is finished, the TOC of session i recorded in the PMA area is transferred to the lead-in area LINi of session i, and data is stored again from the first track of the program area PGMi + 1 of the next session i + 1. Record it. The TOC of the program area PGMi + 1 to be recorded at this time is also recorded in the PMA area. If the recording operation of the session is interrupted while performing the recording mode of the session as described above, the TOC stored in the current PMA area is moved to the lead-in area LIN of the corresponding session regardless of the end of the session, and the corresponding session is opened. The session is final. Opening the session here means that the recording mode has been aborted, but the data can be recorded again next time.

However, when the multi-session recording mode ends in step 819, the session is closed in step 821, the TOC of the last session is read in the PMA area, and recorded in the lead-in area of the last session. Record together. The total TOC is stored in the total TOC area TTOC. Here, the total TOC means all TOCs of each session recorded in the lead-in areas of each session in the multisession recording mode, and the total TOC stored in the total TOC area TTOC is the TOC of the last session in the TOC of the first session. Have an order. At this time, the structure of the disk on which recording is completed has the form as shown in FIG.

However, if the total TTOC area is not set in step 813, the general multisession recording mode is performed in step 822. In this case, the structure of the disk on which recording is completed has the form shown in FIG.

Referring to FIG. 9, the operation of the playback mode will be described. If the system controller 113 detects the playback mode in step 911, it is checked whether the CD recorded in step 913 is a multisession disc. If the CD is a single session disk, the TOC of the lead-in area LIN is read in step 921 to perform a playback operation.

However, in the case of a multisession disc, the system processing unit 113 moves the pickup to a position after the PMA area in step 915 to check whether the total TOC area TTOC exists. That is, it is checked whether the structure of the CD is recorded in the form shown in FIG. In this case, if the TOC area TOC exists, the TOC information of each session recorded in the TOC area TTOC is sequentially read and stored, and the data of the selected tracks are reproduced. However, if the total TOC area TTOC does not exist, that is, in the CD of the multisession mode as shown in FIG. 6, step 919 is performed to sequentially sequence TOCs of the respective sessions recorded in the lead-in area LIN1-LINM of the first session to the last session. Read from and save the data of the selected tracks.

As described above, the CD is a large disk of about 600 Mbytes, and the space after the last lead-out area is secured because of securing the lead-in area and the lead-out area between sessions, rather than recording all the data up to the last area of the physical disk. Will remain. Therefore, a total TOC area is set between the PMA area and the lead-in area of the first session, and the TOCs of the sessions are sequentially recorded in the total TOC area at the end of the recording mode, and the total TOC area TTOC in the playback mode. There is an advantage that it is possible to play back desired tracks at high speed by reading the total TOC recorded in.

Claims (2)

In the disk device recorded in the multi-session mode, located in the inner circumference of the disk and between the MP area and the lead-in area of the first session to store the location information of each session in the multi-session recording mode A position is set, and a total TOS area for sequentially storing location information of its own position and neighboring sessions recorded in the lead-in area of each session at the end of the multi-session recording mode, and the disk in the total TOS area. A plurality of sessions allocated in the circumferential direction are located, and each of the sessions includes a lead-in area for storing location information of a corresponding session and an adjacent session, a program area for storing information of the session, and a lead-out area. The disk device of the multi-session mode, characterized in that. A method of recording and reproducing data on a disc in a multi-session mode, the method comprising: analyzing a mode, allocating a total TioCity region to a predetermined position in a disk in the multi-session recording mode during the analysis; After the seed area is allocated, sessions composed of the lead-in area, program area, and lead-out area are allocated in the circumferential direction of the disc, and the location information of the corresponding session and the adjacent session is recorded in the lead-in area of each session, and the information is recorded in the program area. Recording and accessing the location information of the corresponding session recorded in the lead-in area of each of the sessions and sequentially storing the location information in the total TioC area; Access the total TOS information recorded in the seed area to read the location information of each session; The data recording and reproducing method of the multi-session mode, characterized in that the high-speed moving to the target session.