JP3941771B2 - Recording method of disc-shaped recording medium - Google Patents

Description

The present invention is, for example, a compact disk (CD: Compact Disc) relates to a recording method for a disk-shaped recording medium, such as.

  A compact disc (CD: Compact Disc) is first supplied as a music CD (CD-DA: Compact Disc-Digital Audio), and the standard has been extended for multimedia. As a typical CD standard, CD-DA (Compact Disc-Digital Audio) format CD-ROM (Compact Disc-Read Only Memory) format CD-I (Compact Disc-Interactive) format CD-ROM / XA (CD -ROM Extended Architecture) format.

  The CD-DA format is an audio format. This CD-DA format is a format that is the basis of other CD formats, and defines the physical structure and signal processing system of the disc.

  The CD-ROM format is an extended format for computer data. In this CD-ROM format, an error detection code (EDC) and an error correction code (ECC: Error) are used as physical block structures. Two modes are defined: Mode 1 with Correction Code) and Mode 2 with EDC / ECC omitted.

Further, the CD-I format is a format extended to include like in addition to the image data and character data of the audio data, block structure in this CD-I format is composed in block structure of the CD-ROM mode 2 Yes. In this CD-I format, two modes of a form 1 with EDC / ECC added and a form 2 with EDC / ECC omitted are defined as physical block structures.

Further, the CD-ROM / XA format defines that data and audio data are interleaved in order to synchronize computer data and audio data. Block structure in this CD-ROM / XA format is made up in block structure of the CD-ROM mode 2, in this CD-ROM / XA format, as a physical block structure, a form 1 which by adding EDC / ECC , Two modes of Form 2 in which EDC / ECC is omitted are defined.

  By the way, recently, a CD-R (Compact) in which a recording surface coated with an organic recording material is provided on one side of a disc having the same size as a compact disc (CD), and arbitrary data can be written on the recording surface by a light beam. Disc-Recordable (disc-recordable) discs have been proposed, and a CD-MO (Compact Disc-Magneto Optical) format for rewritable CDs and a CD-WO (Compact Disc-Write Once) format for write-once CDs have been defined. Then, CDs of the various formats described above are created using the CD-R disc.

  Here, in the CD format, one track has a single file structure written at one time or an audio segment.

Initially, a CD-DA disc, a CD-ROM disc, and the like are read-only discs, and are one or more tracks including an audio track in which audio data is recorded and / or a data track in which computer data is recorded. Although it is a single session disc provided with one configured session, a CD-R disc that can be additionally written can record a plurality of sessions on the disc. Session disks are now provided.

  By the way, old-generation recorders and players do not support multi-session discs. Further, the conventional CD-R disc has a format limitation, and if an area called a data session that can be accessed by a CD-ROM device in addition to an audio session is mixed in the same disc by a multi-session format, an existing CD player There is a possibility that the audio track cannot be played back, or the data in the data track is played back by mistake.

Accordingly, in view of the above-described conventional situation, an object of the present invention is to provide a recording method for a multi-session disc-shaped recording medium having an audio session that can be reliably reproduced by an old-generation CD player. .

According to the present invention, a plurality of sessions each including one or more tracks each including an audio track in which audio data is recorded and / or a data track in which computer data is recorded are provided. A recording method for a disc-shaped recording medium comprising a lead-in area indicating the beginning, a program area consisting of audio tracks and / or data tracks, and a lead-out area indicating the end of the session, wherein the first session of the plurality of sessions was a particular session, the particular session only the audio data recorded in the particular session as an audio session comprised only audio track to record audio data and / or computer data in other sessions In this case, a predetermined disc type code is recorded in a disc type code area provided in a lead-in area of a session other than the specific session among the plurality of sessions, and provided in a lead-in area of the specific session. The disc type code area is recorded with a disc type code indicating that the disc type code area consists of only audio tracks.

In the recording method for a disc-shaped recording medium according to the present invention, the first session of a plurality of sessions is set as a specific session, and the specific session is set as an audio session including only audio tracks. When recording audio data and / or computer data in other sessions, a disc type code area provided in a lead-in area of a session other than the specific session among the plurality of sessions is predetermined. The disc type code is recorded, and the disc type code indicating that the disc type code area provided in the lead-in area of the specific session is composed only of audio tracks is recorded, so that the audio data is recorded. A disc-shaped recording medium provided with a plurality of sessions each composed of one or more tracks each consisting of a data track on which a digital track and / or computer data is recorded, wherein each of the plurality of sessions starts a session. A lead-in area, a program area composed of audio tracks and / or data tracks, and a lead-out area indicating the end of the session, and a predetermined disc type code is recorded in a session other than the specific session among the plurality of sessions. The specified disc type code area is provided in the lead-in area of this session, and the specific session is an audio session composed of only audio tracks, and the specific session is composed of only audio tracks. It can be disc type code indicating to create a disk-shaped recording medium having a disc type code area recorded in the lead-in area of the particular session.

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

  In the embodiments described below, the present invention is applied to an optical disc recording / reproducing system using a CD-R disc as a medium.

  As shown in FIG. 1, this optical disk recording / reproducing system has a host computer 1 and a CD-R drive 3 connected to the host computer 1 via a SCSI (Small Computer System Interface) bus 20. . The CD-R drive 3 is detachably loaded with a recordable CD-R disc 10. A plurality of disk drives can be connected to the SCSI bus 2 by a daisy chain configuration.

  The CD-R drive 3 includes an external interface circuit 31, a buffer memory 32, an encode / decode circuit 33, a driver 34, a signal processing circuit 35, a servo circuit 36, and a memory 37 connected to the control CPU block 30. A spindle motor 38, a thread block 39 and an optical block 40 connected to the servo circuit 36 are provided, and the CD-R disk 10 is detachably mounted on a spindle shaft 38A of the spindle motor 38. .

  The CPU block 30 functions as a control unit of the CD-R drive 3 and includes a CPU, a ROM, a working RAM, a register, an input / output interface, and the like. In the ROM, program data for decoding commands of the SCSI interface, program data for performing processing based on the SCSI interface, and the like are written in advance.

  The external interface circuit 31 is an interface for connecting the CD-R drive 3 to the host computer 1 via the SCSI bus 2 and is connected to the CPU block 30 and the buffer. It is connected to the memory 32.

  The buffer memory 32 temporarily stores data recorded on the CD-R disc 10 or data read from the CD-R disc 10 under the control of the CPU block 30. In addition to being connected to the external interface circuit 31, it is connected to the encoding / decoding circuit 33.

  The encoding / decoding circuit 33 performs recording data encoding processing and reproduction data decoding processing under the control of the CPU block 30, and is connected to the buffer memory 32 and is connected to the driver. 34 and the signal processing circuit 35.

  The driver 34 drives a laser light source of the optical block 40 that optically scans the CD-R disk 10 under the control of the CPU block 30, and is connected to the encode / decode circuit 33. And is connected to the optical block 40. Under the control of the CPU block 30, the driver 34 intermittently drives the laser light source in accordance with the recording data supplied from the encoding / decoding circuit 33 in the recording mode, and the amount of light necessary for recording. In the reproduction mode, the laser light source is continuously driven to generate a laser beam having a light quantity necessary for reproduction.

The signal processing circuit 35 performs processing on the reproduction RF signal obtained by optically scanning the CD-R disc 10 with the optical block 40 and supplies the processing result to the CPU block 30 and the encoding / decoding circuit 33. In addition to being connected to the CPU block 30 and the encoding / decoding circuit 33, it is connected to the optical block 40.

The servo circuit 36, under control by the CPU block 30, the spindle motor 38, which performs operation control of the thread block 39 and the optical block 40, the speed reference data and recording is supplied from the CPU block 30 Based on the position / playback position designation data and the playback RF signal supplied from the optical block 40, the rotation control of the spindle motor 38, the feed control of the optical block 40 by the thread block 39, and the CD-R disc 10 are optically controlled. For example, tracking control and focus control of the optical block 40 to be scanned are performed.

  The memory 37 temporarily stores TOC information indicating the recorded contents of the CD-R disc 10, and the CPU block 30 performs data writing / reading. .

  Here, the CD-R disc 10 has a logical structure as shown in FIG.

  That is, the CD-R disk 10 is provided with a light amount calibration area PCA, a program memory area PMA, a first session SS1, a second session SS2, and a third session SS3 from the disk center 11 outward in the radial direction. It is a multi-session disc.

  The light quantity calibration area PCA is a trial writing area for determining the laser power of laser light for writing / reading data in the CD-R drive 3.

In the CD-R drive 3, the CPU block 30 performs test writing on the light amount calibration area PCA of the CD-R disc 10 to control the laser power, that is, the light amount of the laser light for writing / reading data. And the driver 34 is controlled so as to generate an appropriate amount of laser light from the laser light source of the optical block 40.

  In addition, the program memory area PMA is an area in which information regarding tracks of all sessions on the disk is updated and stored.

  In the CD-R drive 3, the CPU block 30 reads out information on tracks of all sessions on the disk (hereinafter, this information is referred to as PMA information) from the program memory area PMA of the CD-R disk 10. The PMA information is stored in the memory 37 and is updated every time a recording operation is performed. For example, the latest PMA information is read from the memory 37 at the end of the recording operation, and the program memory area is read. Control to record in the PMA is performed.

  Each of the sessions SS1, SS2, and SS3 is an area where audio data and / or computer data is recorded, and is a program area composed of a lead-in area LIA indicating the start of the session and one or more tracks. It consists of a PRA and a lead-out area LOA indicating the end of the session.

  In this embodiment, the first session SS1 is defined as an audio session. For example, the program area PRA is composed of three audio tracks of track numbers TNO = 1 to 3 where audio data is recorded.

  In each lead-in area LIA of each of the sessions SS1, SS2 and SS3, information on the recorded track and information on the disc are defined as CD standards S0, S1, CONTROL, ADR, TNO, POINT, MIN, and SEC. , FRAME, ZERO, PMIN, PSEC, PFRAME, and CRC. The TOC (Table Of Contents) information having the data structure shown in FIG. 3 is encoded into the subcode Q channel and recorded in each TOC area.

In the CD-R drive 3 , the CPU block 30 creates TOC information for each session of the CD-R disc 10 on the memory 37. Control is performed to read out the TOC information and record it in the respective TOC areas.

  PMIN in POINT area POINT = A0 gives the value of the head track number of the program area, and PSEC gives the following disk type codes [00], [10], [ 20].

  00: CD-DA and CD-ROM 10: CD-I 20: CD-ROM / XA And, in the CD-R drive 3, the CPU block 30 gives the above-mentioned information to give a disc type code to the multi-session disc. Control to record a common disc type code indicating the disc format of the multi-session disc in PSEC at POINT = A0 in the TOC area of each of the lead-in areas LIA of the sessions SS2 and SS3 other than the first session SS1 is performed. It has become.

  Further, in this embodiment, in order to give the session format in the multi-session disc, PMIN in POINT area POINT = A0 gives the value of the head track number of the program area of the session, and the session defined as follows in PSEC Formats [00], [10], and [20] are given.

  00: CD audio session or CD-ROM mode 1 session 10: CD-I session 20: CD-ROM / XA session In the CD-R drive 3, the CPU block 30 causes the lead-in of the first session SS1. As PSEC in POINT = A0 in the TOC area of the area LIA, control is performed to record [00] indicating that the first session SS1 is an audio session having a program area PRA composed only of audio tracks. ing.

  In the CD-R drive 3 having such a configuration, when the CPU block 30 records data on the CD-R disc 10 in response to a write command from the host computer 1, it is shown in the flowchart of FIG. Such control operation is performed.

  That is, if a CD-R disc 10 whose disc type has not been determined is loaded, first, in step S1, a disc type code for designating a disc type in the program memory area PMA of the CD-R disc 10 is called a CD. A disc type code [00] indicating DA and CD-ROM, a disc type code [10] indicating CD-I, or a disc type code [20] indicating CD-ROM / XA is written, and the CD-R disc 10 Determine the disk type. For example, the CD-R disk 10 is defined as a CD-ROM / XA disk by writing the disk type code [20] in the program memory area PMA.

  Then, in step S2, tracks are written in the program area PRA of the CD-R disc 10, and in step S3, it is determined whether or not the session is ended.

  If the determination result in step S3 is “NO”, that is, if the session is not terminated, the process returns to step S2 to repeatedly perform track writing. If the determination result in step S3 is “YES”, that is, if the session is ended, the process proceeds to step S4.

  In step S4, it is determined whether or not the first track of the session is an audio track.

  If the determination result in step S4 is “YES”, that is, if the first track of the session is an audio track, the process moves to step S5 and a disc type code [00] indicating that the session is an audio session is given as the TOC information of the session. In step S7, the lead-in area LIA and the lead-out area LOA are written. Then, the process returns to step S2 to record a new session.

  If the determination result in step S4 is "NO", that is, if the first track of the session is not an audio track, the process moves to step S6 and the disc type code defined in the program memory area PMA, for example, [20] is added to the session. Is provided as the TOC information, the process proceeds to step S7, where the lead-in area LIA and the lead-out area LOA are written. Then, the process returns to step S2 to record a new session.

  Here, in this embodiment, the CPU block 30 sets the first session SS1 of the plurality of sessions as a specific session, and only audio data is transferred to the first session SS1 in accordance with a write command from the host computer 1. Control for recording audio data and computer data so that an audio track is provided after the data track in a session composed of other audio tracks and data tracks.

  As a result, the CD-R drive 3 records audio data and / or computer data in a plurality of sessions on the CD-R disc 10 in track units in response to a write command from the host computer 1. A type code is recorded, and a session other than a specific session among a plurality of sessions has a disc type code area in which a common disc type code is recorded, and the specific session is composed only of audio tracks. It is possible to create a multi-session CD having a disc type code area in which a disc type code indicating that this particular session consists only of audio tracks is recorded. In the thus created multi-session CD, audio data and / or computer data is transmitted in a session other than a specific session among a plurality of sessions composed of one or more tracks including audio tracks and / or data tracks. And a common disc type code in a disc type code area of a session other than the specific session, and only the audio data is held in the specific session, and the specific session is composed only of an audio track. Can be held in the disc type code area of the specific session.

  That is, the CPU block 30 in the CD-R drive 3 records only audio data in the specific session as an audio session composed of only audio tracks, and stores audio data and / or in other sessions. It functions as a recording control means for performing control for recording computer data, and records a common disc type code in a disc type code area of a session other than the specific session among the plurality of sessions, and the specific session This disc type code area functions as a disc type code recording control means for performing control to record a disc type code indicating that it is composed only of audio tracks.

  In the CD-R drive 3, the CPU block 30 sets the first session SS 1 among the plurality of sessions as a specific session, and sends audio to the first session SS 1 in accordance with a write command from the host computer 1. By performing control to record only data, it is possible to create a multi-session CD having an audio session that can be reliably reproduced by an old-generation CD player.

Further, in the CD-R drive 3, the CPU block 30 performs control for recording audio data and computer data so that an audio track is provided after the data track in a session including the audio track and the data track. In a session composed of an audio track and a data track, a multi-session CD in which an audio track is provided after the data track can be created. In a multi-session CD created in this way, an audio track is provided after a data track in a session consisting of an audio track and a data track, so that depending on the audio track whether the first track of the session is a data track, Whether or not it is an audio session can be determined.

  In the CD-R drive 3, the CPU block 30 performs control as shown in the flowchart of FIG. 5 when reading data from the CD-R disk 10 in response to a read command from the host computer 1. Perform the action.

  That is, for the loaded CD-R disc 10, first, the TOC information of all sessions is read in step S11, the disc type is discriminated in step S12, and the process proceeds to step S13.

  In step S13, the command supplied from the host computer 1 is discriminated. If the command is an audio data read command, the process proceeds to step S14. If the command is a computer data read command, the process proceeds to step S15. Further, when a command is not supplied, the command discrimination process is repeated, and the process waits until the next command is supplied.

  In step S14, the encoding / decoding circuit 33 is controlled to perform a CD-DA playback operation.

  In step S15, a process of determining whether the data format to be reproduced is CD-I or CD-ROM / XA based on the disc type code is performed.

  If the determination result in step S15 is “NO”, that is, if the data format to be reproduced is not CD-I or CD-ROM / XA, the process proceeds to step S16, and the CD-ROM mode 1 and mode 2 decoding processing is performed. The encoding / decoding circuit 33 is controlled so as to perform the reproducing operation.

If the determination result in step S15 is "YES", that is, if the data format to be reproduced is CD-I or CD-ROM / XA, the process proceeds to step S17 and the CD-I or CD-ROM / XACD-ROM is read. The encoding / decoding circuit 33 is controlled so as to perform code processing in the form 1 and form 2, and a reproduction operation is performed.

  Therefore, in this CD-R drive 3, the CPU block 30 identifies a common disc type code recorded in the disc type code area of a session other than a specific session consisting only of audio tracks of a plurality of sessions. The code processing is switched in accordance with the disc type code, and the reproduction operation can be performed reliably.

That is, the CPU block 30 in the CD-R drive 3 is recorded in the disc type code area of a session other than the specific session among the plurality of sessions, based on the reproduction data from the CD-R disc 10. functions as disc type code identifying means for identifying a common disc type code is, depending on the disc type code identified by the disc type code discriminating means, switching the decoding processing of the encoder / decoder circuit 33 control means Function as.

  Here, the CPU block 30 performs the disc type determination processing in step S12 in the procedure shown in the flowchart of FIG.

  That is, in the disc type determination process, it is first determined in step S21 whether or not the beginning of the session is an audio track. If the determination result in step S21 is “NO”, that is, if the head of the session is not an audio track, the process proceeds to step S22. If the determination result is “YES”, that is, the head of the session is an audio track, step S22 is performed. The process moves to S23.

  In step S22, the disc type is determined based on the disc type code given as the TOC information of the session, and the disc type determination process is terminated.

  In step S23, the process moves to the next session, and in next step S24, it is determined whether or not it is the final session. If the determination result in step S24 is “NO”, that is, if it is not the last session, the process returns to step S21 to determine whether or not the head of the session is an audio track. If the determination result in step S24 is “YES”, that is, the last session, the process proceeds to step S25.

  In step S25, the disc type is determined as [00], and the disc type determination process is terminated.

  That is, the CPU block 30 in the CD-R drive 3 detects a session whose head is a data track based on the reproduction data from the CD-R disc 10, and is recorded in the disc type code area of the session. It functions as a disc type code identifying means for discriminating the disc type code as a common disc type code.

  Therefore, in this CD-R drive 3, the CPU block 30 quickly transmits the common disc type code recorded in the disc type code area of the session other than the specific session consisting of only the audio track of the plurality of sessions. The reproduction operation can be performed by identifying and switching the code processing according to the disc type code.

It is a block diagram which shows the structure of the optical disk recording / reproducing system to which this invention is applied. It is a figure which shows the logical structure of the CD-R disc used for the said optical disk recording / reproducing system. It is a figure which shows the data structure of the TOC information recorded on the TOC area | region of the said CD-R disc. It is a flowchart which shows the control operation by the CPU block at the time of writing of the CD-R drive in the said optical disk recording / reproducing system. It is a flowchart which shows the control operation by the CPU block at the time of the reading of the said CD-R drive. It is a flowchart which shows the procedure of the disc identification process by the CPU block of the said CD-R drive.

Explanation of symbols

  1 host computer, 2 SCSI bus, 3 CD-R driver, 10 CD-R disk, 30 CPU block, 31 external interface, 32 buffer memory, 33 encoding / decoding circuit, 34 driver, 35 signal processing circuit, 36 servo circuit, 37 memory, 38 spindle motor, 39 thread block, 40 optical block

Claims (1)

A plurality of sessions each including one or more tracks each including an audio track on which audio data is recorded and / or a data track on which computer data is recorded are provided. Each of the plurality of sessions is a lead indicating the beginning of the session. A recording method of a disc-shaped recording medium comprising a program area comprising an in area and an audio track and / or a data track and a lead-out area indicating the end of the session,
The first session of the plurality of sessions is a specific session,
When recording only the audio data in the specific session as an audio session composed of only audio tracks, and recording the audio data and / or computer data in another session,
A predetermined disc type code is recorded in a disc type code area provided in a lead-in area of a session other than the specific session among the plurality of sessions,
A disc type recording medium recording method, wherein a disc type code indicating that the disc type code area provided in the lead-in area of the specific session consists of only an audio track is recorded.

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