JP3992850B2 - Information recording / reproducing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an information recording / reproducing apparatus such as a CD-R drive and a CD-RW drive for recording and reproducing information in a series of data block groups.
[0002]
[Prior art]
An information recording / reproducing apparatus such as a CD-R / RW drive apparatus is one of information recording apparatuses that records information in units of a series of data block groups (referred to as “tracks”). Here, a CD-R / RW drive device will be described as an example.
[0003]
There are several types of disk formats for managing directories and files, including those for CD-ROM, floppy disk drive (FDD), and hard disk drive (HDD). As an example, the most common disk format for CD-ROM A description will be given using the ISO 9660 format.
[0004]
A CD-R / RW drive device records information such as files and music data in a series of data block group units (tracks) on a CD-R / RW disc. It is divided into recording sections (referred to as “sessions”) (the size of this recording section varies depending on each recording section), and one or more tracks are recorded in that recording section (session).
[0005]
The head area of the recording section (session) is a session information management section called a session management information area (Lead-In area), and called session management information (Table Of Contents: TOC) in the session management information area. Data is recorded.
[0006]
In an ISO9660 format disc, the number of tracks present in each session is generally one.
[0007]
In this format, as shown in FIG. 4, a file information management unit 50 that manages the location and attributes of directories and files is recorded at the beginning (predetermined location) of a track in a recording section (session). Followed by one or more file descriptors and a file body 49.
[0008]
In a CD-R / RW drive device, when these data are recorded at once with the Track At Once function, when a write error occurs during recording, the track recording is terminated at that point, The session was closed with a command. Closing this session means recording session information in the TOC area and writing the TOC to complete the session.
[0009]
In such a case, the file information management unit composed of several to several tens of blocks is correctly recorded, but there may be a state where the main body of the file is interrupted. For example, since the file information management unit is correctly recorded, 100 pieces of file information is recorded therein, but there are only 30 file bodies.
[0010]
When an arbitrary file is reproduced from such a disk by using an OS such as Windows 95 (registered trademark), there is a problem that the disk cannot be reproduced because there is no main body of the file.
[0011]
An OS such as Windows 95 accesses the last session recorded on the inserted CD, plays back the file information management unit recorded in the session, and is recorded on the CD based on the contents. Directory / file management and playback processing.
[0012]
Conventionally, when a write error occurs, dummy data is recorded until the CD standard has a minimum track length of 300 sectors to prevent double writing of tracks (for example, Japanese Patent Application No. 8-303053). Issue).
[0013]
[Problems to be solved by the invention]
However, in the above information recording device, when several to several tens of blocks are recorded at the time of a write error to the disc, when such a disc is inserted into the device later, the error track is regarded as a blank track at the time of mounting. There was a problem that there was.
[0014]
Even if the track is filled with dummy data, if the track is the first track of the second session, a problem that the OS such as Windows cannot recognize the file information of the first session occurs.
[0015]
In other words, the OS extracts the file information recorded on the disc from the data of the file information management unit recorded in the final session, and therefore in the recording of dummy data as in the conventional information recording apparatus, the file format (ISO9660) Etc.), there was a problem that it was later determined to be a blank disk on which no files were recorded on the OS.
[0016]
The present invention has been made in view of the above points, and it is an object of the present invention to perform error processing when a write error occurs during data recording so as not to cause a problem during subsequent data reproduction.
[0017]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an information recording / reproducing apparatus for recording and reproducing information such as files in units of a series of data blocks on a recording medium capable of recording and reproducing information. Track recording failed due to a write error while recording information for a given session If After recording session management information, Only when the session immediately preceding the session in which the above write error occurred was recorded in the specified file format Means are provided for copying and recording data of the file information management section recorded in the session immediately before the session in which the write error has occurred in the next new session.
[0018]
Also, As above In an information recording / reproducing apparatus, When it is determined that the recording medium is a recording medium that can rewrite information or a recording medium that can be recorded only once, and a recording medium that can rewrite information by the means, Means may be provided for erasing the track in which the write error has occurred.
[0019]
Furthermore, in the information recording / reproducing apparatus as described above, a write error occurred while recording information for the first session of the recording medium. Case When a command to record session management information is received from the host device to the session information management unit of the session in which the write error has occurred, the session management information is recorded, and then a track of a predetermined length for the next new session It is preferable to provide means for recording special data different from the data recorded in the file information management unit and completing the new session.
[0020]
In the information recording / reproducing apparatus as described above, a write error occurred during recording of information for a session after the music session of the recording medium. Case When a command to record session management information is received from the host device to the session information management unit of the session in which the write error has occurred, the session management information is recorded, and then a track of a predetermined length for the next new session It is preferable to provide means for recording special data different from the data recorded in the file information management unit and completing the new session.
[0021]
Furthermore, in an information recording / reproducing apparatus for recording and reproducing information such as a file in units of a series of data blocks with respect to a recording medium capable of recording and reproducing information, the recording medium is inserted. Case When the error session in which the track is recorded on the recording medium but the track management information for the track is not recorded in the track information management unit is determined, the final address of the track is detected, and based on the final address Data of the file information management unit recorded in the session immediately before the error session after recording the track management information in the track information management unit, recording the session management information in the session information management unit of the session in which the track exists It is preferable to provide a means for copying and recording to the next new session.
[0022]
Furthermore, As above In an information recording / reproducing apparatus, When it is determined that the recording medium is a recording medium that can rewrite information or a recording medium that can be recorded only once, and a recording medium that can rewrite information by the means, When an error session in which a track is recorded on the recording medium but track management information for the track is not recorded in the track information management unit is determined, the final address of the track is detected, and track management based on the final address is performed. Means may be provided for erasing unauthorized tracks without recording the information in the track information management section.
[0023]
The information recording / reproducing apparatus according to claim 1 of the present invention is configured as described above, so that the file information management unit recorded in the session immediately before the error session of the recording medium such as a disk is placed on the recording medium. Since it is recorded in a new session which is the last existing session, it can be the same as the deletion of the file information management unit of the error session, and the file information management unit when the recording medium is used in an OS such as Windows 95 Can be played correctly.
[0024]
The information recording / reproducing apparatus according to claim 2 of the present invention is configured as described above, so that an error session is recorded when a recording medium such as a CD-RW disc capable of recording and erasing information is generated. Is eliminated, and there is no wasted space for unrecorded parts.
[0025]
The information recording / reproducing apparatus according to claim 3 of the present invention is configured as described above, so that the data of the file information management unit is included in the last session (newly added dummy session) recorded on the recording medium. Is not recorded, OSs such as Windows 95 do not misrecognize directory and file information, and the OS can handle the same as a blank disk.
[0026]
The information recording / reproducing apparatus according to claim 4 of the present invention is configured as described above, so that the data of the file information management unit is not recorded in the final session recorded on the recording medium. The OS does not misrecognize directory and file information.
Further, the OS can be handled in the same manner as a recording medium on which only music data is recorded.
[0027]
The information recording / reproducing apparatus according to claim 5 of the present invention is configured as described above, completes a session in which an illegal track exists, and records the file information management unit of the session immediately before the error session in a new session. Therefore, not only can an illegal disc be recorded and reproduced, but a file recorded in the past can be reproduced from an OS such as Windows95.
[0028]
The information recording / reproducing apparatus according to claim 6 of the present invention is configured as described above to erase illegal tracks on a recording medium such as a CD-RW disc capable of recording and erasing information. As a result, there is no waste of unrecorded part space.
[0029]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
FIG. 1 is a block diagram showing the configuration of a CD-R / RW drive apparatus which is an embodiment of the information recording / reproducing apparatus of the present invention.
[0030]
This CD-R / RW drive device includes a CPU 1, a flash ROM 2, a host interface controller 3, a buffer manager 4, a dynamic RAM 5, a subcode operation controller 6, a CD-ROM encoder 7, an SRAM 8, a CD-ROM decoder 9, and an audio circuit 10. , System controller 11, CD encoder 12, CD decoder 13, servo circuit 14, spindle motor controller 15, and SCSI bus 16, and data recording on a disk 17 that is a recording medium such as a CD-R disk or a CD-RW disk And playback.
[0031]
The CPU 1 is a central processing unit (microcomputer) that controls the operation of the entire CD-R / RW drive device.
The flash ROM 2 is a non-volatile memory in which the CPU 1 can arbitrarily erase and rewrite contents.
[0032]
The host interface controller 3 is an LSI that controls communication between a host computer as a host device and the CD-R / RW drive device.
The buffer manager 4 is an LSI that controls transfer of transfer data from the host computer and data read from the disk 17.
[0033]
The dynamic RAM 5 is a buffer memory that temporarily stores transfer data from the host computer and data read from the disk 17.
The subcode operation controller 6 is an LSI that generates a subcode to be recorded on the disk 17 and separates a subcode read from the disk 17.
[0034]
The CD-ROM encoder 7 is an LSI that modulates CD-ROM data before writing it to the disk 17.
The SRAM 8 is a memory that stores data such as program variables.
The CD-ROM decoder 9 is an LSI that demodulates the read CD-ROM data. The audio circuit 10 is an LSI that controls music reproduction.
[0035]
The system controller 11 is an LSI that controls recording and reproduction of data on the disk 17 and performs various processes relating to the present invention.
The CD encoder 12 is an LSI that modulates user data and subcode so as to conform to the media standard before writing to the disk 17.
[0036]
The CD decoder 13 is an LSI that demodulates the data read from the disk 17 by separating it into user data and subcodes.
The servo circuit 14 is an LSI that controls servo such as focusing and tracking of laser light with respect to the disk 17.
[0037]
The spindle motor controller 15 is an LSI that controls the rotation of the disk 17.
The SCSI bus 16 is a communication line that connects the CD-R / RW drive device and the host computer, and exchanges various data via the communication line.
[0038]
That is, the system controller 11 or the like has a means for recording and reproducing information such as files in units of a series of data blocks on a recording medium capable of recording and reproducing information, and a predetermined session of the recording medium. On the other hand, track recording failed due to a write error while recording information. If so After recording session management information for Only when the session immediately preceding the session in which the above write error occurred was recorded in the specified file format It fulfills the function of means for copying and recording the data of the file information management unit recorded in the session immediately before the session in which the write error has occurred in the next new session.
[0039]
Also, When it is determined that the recording medium is a recording medium that can rewrite information or a recording medium that can be recorded only once, and a recording medium that can rewrite information by the means, It also functions as means for erasing the track in which the write error has occurred.
[0040]
Furthermore, a write error occurred while recording information for the first session of the recording medium. Case When a command to record session management information is received from the host device to the session information management unit of the session in which the write error has occurred, the session management information is recorded, and then a track of a predetermined length for the next new session It serves as a means for recording special data different from the data recorded in the file information management unit and completing the new session.
[0041]
Also, a write error occurred while recording information for a session after the music session on the recording medium. Case When a command to record session management information is received from the host device to the session information management unit of the session in which the write error has occurred, the session management information is recorded, and then a track of a predetermined length for the next new session It also functions as a means for recording special data different from the data recorded in the file information management unit and completing the new session.
[0042]
Furthermore, the recording medium was inserted Case When the error session in which the track is recorded on the recording medium but the track management information for the track is not recorded in the track information management unit is determined, the final address of the track is detected, and based on the final address Data of the file information management unit recorded in the session immediately before the error session after recording the track management information in the track information management unit, recording the session management information in the session information management unit of the session in which the track exists It serves as a means for copying and recording the data to the next new session.
[0043]
Furthermore, When it is determined that the recording medium is a recording medium that can rewrite information or a recording medium that can be recorded only once, and a recording medium that can rewrite information by the means, When an error session in which a track is recorded on the recording medium but track management information for the track is not recorded in the track information management unit is determined, the final address of the track is detected, and track management based on the final address is performed. It functions as means for erasing unauthorized tracks without recording the information in the track information management section.
[0044]
FIG. 2 is a diagram showing a session format of the disk 17.
This CD-R / RW drive device can record and reproduce data on the disk 17 having the format shown in FIG.
[0045]
The disk 17 includes a power calibration area (PCA) 20 for performing trial writing for determining recording power from the inner periphery, a track information management unit (program memory area: PMA) 21, and a recording section (session) 22 (session No. 1). , 2 ...) exists.
[0046]
The size of the session 22 is random and varies depending on the number of tracks and the size of the tracks.
The session 22 includes a session information management area (Lead In Area) 23, which is a session information management unit, one or a plurality of tracks 24, and a recording segment final area (Lead Out Area: Lead Out Area) 25. The size of both the session information management area and the recording section final area is determined.
[0047]
The session information management area 23 is an area that indicates the beginning of a session, and is an area that records session management information (TOC) that is track information within the session.
The track 24 is an area where the user records data such as files and music. The recording section last area 25 is an area indicating the end of the session.
The program area 26 is an area for recording user data.
[0048]
The size of the session information management area of the first session differs depending on the disc manufacturer, and is about 2 minutes 30 seconds.
The size of the recording section final area of the first session is 1 minute 30 seconds.
The size of the session information management area after the second session is 1 minute, and the size of the recording section final area is 30 seconds.
[0049]
Session management information data called TOC is recorded in the session information management area, and the CD playback device can obtain track information on the inserted disc based on this data.
[0050]
For example, when a music CD is inserted into an audio CD player (Audio CD Player), the total number of tracks and the length of each track are displayed in time units on the display. This is because the player is playing the TOC. It can be displayed.
[0051]
The start of the program area 26 starts from the top of the track No. 1 of the first session, and the start start address is 0 minute 0 second 0 frame.
[0052]
FIG. 3 shows the format of a track recorded by the track-at-once method. A track recorded on a CD-R / RW disc is composed of a pre-gap (PreGap) 30, user data (User Data) 31, and 2 run-out blocks (Run Out Block) 32.
The pre-gap 30 is composed of a link block (Link Block) 33 of one block, a run-in block (Run In Block) 34, and the like.
[0053]
The pre-gap 30 (150 blocks, 225 blocks) is located at the head of the track and is a silent part in terms of music.
The user data section 31 is a place for recording data transferred from a user (host computer).
The runout block (2 blocks) 32 is a block that means the end of the track.
[0054]
The link block 33 (one block) is a block that means a connection between tracks.
The run-in block (4 blocks) 34 is a block that means the beginning of a track.
[0055]
This CD-R / RW drive apparatus uses the ISO9660 standard as a file format.
FIG. 4 is an ISO9660 file format diagram.
[0056]
Terminology of ISO9660 format
(1) Volume space (Volume Space) 40
When each session on the CD is roughly divided, the system area 41 and the data area 42 are obtained.
[0057]
(2) System Area 41
16 blocks (LBN0-15) from the beginning of the first track of each session exist as a system area. The content is not defined in this standard.
[0058]
(3) Data area 42
The rest of the volume space. This consists of the following data:
Primary volume descriptor 43
(Primary Volume Descriptor)
Supplementary volume descriptor 44
(Supplementary Volume Descriptor)
・ Terminator 45
-Path table (Path Table) 46
Directory descriptor 47
(Directory Descriptor)
-File Descriptor (File Descriptor) 48
・ File body 49
This area includes a file information management unit 50 and a file main unit 49.
[0059]
(4) Primary volume descriptor 43
It is called PVD and is located in LBN16. An OS such as Windows always accesses this.
The size of the volume space, the size and position of the path table 46, root directory information, volume date, and the like are described.
[0060]
(5) Supplementary volume descriptor 44
It is said to be SVD and, if present, is immediately after PVD.
The OS refers to this when using it in a Japanese environment or when using Unicode (Uni Code).
[0061]
(6) Terminator 45
It means the end of PVD and SVD. Normally, recording is performed on the disc in the order of PVD, SVD, and terminator.
[0062]
(7) Path table 46
The names and recording positions of the directory descriptor 47 and the file descriptor 48 are described.
[0063]
(8) Directory descriptor 47
Describes the location of the directory body, its name and attributes.
[0064]
(9) File descriptor 48
The position where the file body of the file body section 49 is recorded, its name and attributes are described.
[0065]
(10) File body 49
The actual profiles such as word profiles and executable files are recorded.
[0066]
Each session of the disk 17 has a volume space 40, and a system area 41 and a data area 42 exist.
The data area 42 includes a file information management unit 50, a path table 46, a directory descriptor 47 and a file descriptor 48, and a file main body unit 49 including a plurality of one or a plurality of files. The management unit 50 includes a primary volume descriptor (PVD) 43, a supplement volume descriptor (SVD) 44, and a terminator 45 from the top.
[0067]
The PVD 43, the SVD 44, and the terminator 45 are composed of at least one sector, and each sector has an ID indicating them at the head.
The PVD 43 is “01”, the SVD 44 is “02”, and the terminator 45 is “FF”.
[0068]
An OS such as Windows 95 reproduces the 17th sector (LBN = 16) from the beginning of the first track of the last session existing on the disk and looks at the contents of the PVD 43.
[0069]
In the Japanese environment, the SVD 44 is reproduced, and the next logical address is reproduced until the terminator block is detected.
In the SVD 44, the position where the root directory descriptor (Root Directory Descriptor) exists is recorded, and by reproducing this position, the name of the directory or file existing under the root directory and the descriptor exist. You know the address to do.
[0070]
Furthermore, if the descriptor of the directory under the root directory is reproduced, the name of the directory and file under the root directory and the location of the descriptor with respect to them can be known.
In this way, the directory, files and contents under the root directory are confirmed, and the file body is reached.
[0071]
In general, in a multi-session CD, there are a plurality of sessions, and there are generally as many file information management units as the number of sessions.
Such a disc is created when a user adds a file to be saved.
[0072]
For example, suppose you wrote the '97 .October chart in the first session.
When one month has passed and November data is recorded on the disc, it is recorded in the second session.
In this case, it is necessary to copy the file information management unit 50 recorded in the first session to the file information management unit 50 in the second session so that the October data can also be viewed from the OS. The writer software performs such an operation and inherits the data of the file information management unit 50 recorded in the past.
[0073]
Next, processing according to claim 1 of the present invention in the CD-R / RW drive apparatus will be described.
[0074]
In this CD-R / RW drive device, a disk 17 capable of recording and reproducing information is used, and information such as a file is recorded and reproduced on the disk 17 in units of tracks which are a series of data block groups. It is.
[0075]
When a write error occurs during recording of information for a session that is a predetermined recording section of the disc 17 and track recording fails, session management information (in the session information management area of the error session) When a command to record (TOC) is received from the host computer of the host device, the file information recorded in the session immediately before the error session for the next new session after recording the session management information (TOC) of the session. Record file management information in the management unit. The file information management unit is an information management unit that manages the location and attributes of recorded files and directories as a disk format.
[0076]
FIG. 5 is a flowchart showing the processing according to the first aspect. “S” in the figure indicates a step.
In this process, it is determined whether or not there is a track in which a write error has occurred in Step 1, and if there is, the process proceeds to Step 2 to record the TOC of the error session, and proceeds to Step 3 to read out the error session (Lead -Out) The area is recorded, and the process proceeds to step 4 to determine whether it is ISO9660 format data. If it is ISO9660 format data, the process proceeds to step 5 to execute the recover session recording process, and this process ends.
[0077]
If it is determined in step 1 that there is no track in which a write error has occurred, the process proceeds to step 6 to record the TOC of the current session, and proceeds to step 7 to record the lead-out area of the current session. Exit.
If it is determined in step 4 that the data is not ISO 9660 format data, the process is terminated.
[0078]
FIG. 6 is a flowchart showing the recovery session recording process of FIG.
In this recovery session recording process, the start address of the first track of the previous session is acquired in step 11, the process proceeds to step 12, the address of the file information management unit is set, the process proceeds to step 13, and the file management information is read. Proceeding to step 14, it is determined whether or not the previous session is ISO9660 format data.
[0079]
If the ISO 9660 format data is determined in step 14, the process proceeds to step 15 to execute the recover track recording process, proceeds to step 16 to record the TOC of the recover session, and proceeds to step 17 to read out the recover session (Lead-Out). ) Record the area and end this process.
If it is determined in step 14 that the data is not ISO 9660 format data, the process is terminated.
[0080]
Next, the processing according to claim 1 of the present invention will be further described.
This session recording process is executed when a command for closing a session (Close Session Command) is received from the host computer.
The command for closing the session is a command for recording data in the session management information (TOC) and lead-out areas to complete the session.
[0081]
When the system controller 11 first records a track in the session to be recorded on the disk 17, a write error due to an servo error such as off-track or an interface (I / F) error such as a buffer underrun (Buffer Under run) occurs. It is confirmed whether it has occurred (S1).
[0082]
If a write error has occurred, session management information is recorded in the TOC area of the error session (S2), and a lead-out area indicating the end of the session is recorded (S3). It is confirmed whether or not the track is ISO9660 format data (S4).
[0083]
The confirmation means is that each ID (starting byte of the sector) of PVD, SVD, and terminator is “01”, “02”, “FF”, and a standard identifier (2 in PVD, SVD). This is done by confirming that (byte-6th byte) is “CD001”.
[0084]
If it is determined that the data is ISO 9660 format data, the recovery session recording process (S5) is performed and the process is terminated.
[0085]
This recovering session recording process is a process of copying and recording the correctly recorded file information management part immediately before the error session for the next session after the error session.
[0086]
Next, the file information management unit to be recorded at the time of recovery refers to PVD, SVD, and terminator.
[0087]
If the PVD and SVD are reproduced, the address of the root directory descriptor (Root Directory Descriptor) can be known, and the file body can be reached from there.
[0088]
When no write error has occurred in the determination of whether or not a write error has occurred (S1), session management information is recorded in the TOC area of the current session (S6), and a lead-out area is recorded (S7). ), The session completion processing is terminated.
[0089]
If it is determined in step S4 that the ISO 9660 format data is not recorded in the error track, the process ends with the error session completed.
[0090]
Next, in the recover session recording process, first, the start address of the first track of the session immediately before the error session is read from the TOC information stored in the DRAM 5 in the CD-R / RW drive device (S11). An address obtained by adding 10h (16 sectors) to the address is set as a PVD address (S12), and reproduction is continuously performed until the terminator can be confirmed (S13).
[0091]
Here, when information from the PVD to the terminator cannot be obtained, it is not determined to be ISO9660 format data.
[0092]
If the ISO 9660 format data is determined (S14) and the previous session is determined to be the ISO 9660 format data, a recovery track recording process is performed (S15).
[0093]
In this process, the track length is set to 300 sectors, which is the minimum of the CD standard, and from the PVD of a normal session (the session immediately before the error session) to the terminator (Terminator) is recorded in the user data portion so as to match the ISO9660 format.
[0094]
Thereafter, the session information management data of the session is recorded in the TOC area of the session (S16), the lead-out area is recorded, and the process is terminated.
If the session immediately before the error session cannot be determined to be ISO 9660 format data in the determination of ISO 9660 format data (S14), the process is terminated.
[0095]
Thus, for example, the disk format with an error session as shown in FIG. 7 becomes the disk format shown in FIG. 8 by the above-described processing.
[0096]
FIG. 7 shows the disk format when a write error occurs during recording of the track of the second session and an error sector occurs. As shown in FIG. By creating a recovery session in which only the file information management unit of the first session is copied to the third session, the file information can be correctly recognized from the OS during later playback.
[0097]
In this way, since the file information management unit recorded in the session immediately before the error session is recorded in the new session which is the last session existing on the disk, the file information management unit in the error session is deleted. Therefore, when the disk is used in an OS system such as Windows 95, the file managed by the file information management unit can be correctly reproduced.
[0098]
Next, in the processing according to claim 1 of the present invention described above, for example, the file information management unit of the session immediately before the error session is copied to a new session to a recording medium such as a CD-R disc that can be recorded only once. Although this is effective, a recording medium such as a CD-RW disc, on which information can be rewritten many times, wastes recording space.
[0099]
Then, in order to eliminate such a problem, the processing according to claim 2 of the present invention in the CD-R / RW drive apparatus will be described.
[0100]
In this process, when a disc 17 capable of recording and erasing information has a write error while recording information for a predetermined recording section (session) and track recording fails. When a command for recording the session management information (TOC) is received from the host computer in the session information management unit of the error session, the track in which the error has occurred is erased without recording the session management information (TOC). The process ends.
[0101]
FIG. 9 is a flowchart showing the processing according to the second aspect.
In this disc-specific session recording process, it is determined whether or not there is a track in which a write error has occurred in step 21, and if there is, the process proceeds to step 22 to determine whether or not the error disc is a CD-RW disc. If it is a disc, the process proceeds to step 27 to execute error track erasure processing, and this processing is terminated.
[0102]
If it is determined in step 22 that the error disk is not a CD-RW disk, the process proceeds to step 23 to record the TOC of the error session, and proceeds to step 24 to record the lead-out area of the error session. The process proceeds to step 25 to determine whether the data is ISO 9660 format data. If the data is ISO 9660 format data, the process proceeds to step 26 to execute the recover session recording process shown in FIG. 6 and the process ends.
[0103]
If it is determined in step 21 that there is no track in which a write error has occurred, the process proceeds to step 28 to record the TOC of the current session, and proceeds to step 29 to record the lead-out area of the current session. Exit.
If it is determined in step 25 that the data is not ISO9660 format data, the process is terminated as it is.
[0104]
Next, the processing according to claim 2 of the present invention will be further described.
This process determines whether the inserted disk 17 is a CD-R disk or a CD-RW disk. If it is determined that the disk 17 is a CD-RW disk, the process ends without executing the recovery session recording process. .
[0105]
This disc-specific session recording process is also executed when a command to close a session (Close Session Command) is received from the host computer.
[0106]
When the track in the session of the disk 17 ends with a write error (S21), the system controller 11 checks the type of the inserted disk 17 (S22).
If it is determined that the disc is a CD-RW disc, an erase pattern is recorded in the error track area, the error track is erased (S23), and the session completion process is terminated.
[0107]
If it is determined whether the disc 17 is a CD-RW disc (S22) and the inserted disc 17 is a CD-R disc, the session management information is recorded in the TOC area of the error session (S23). A lead-out area indicating the end of the session is recorded (S24), and it is confirmed whether the error track is ISO9660 format data (S25).
[0108]
This confirmation means is performed in the same manner as described above.
If it is determined that the data is ISO 9660 format data, the above-described recover session recording process (S26) is performed and the process ends.
[0109]
Thus, in a disc such as a CD-RW disc from which information can be erased, the disc format shown in FIG. 10 can be changed to the disc format shown in FIG.
[0110]
Therefore, by making the disk format as shown in FIG. 10, the error session recorded in the second session of the disk 17 is erased, and only the first session exists on the disk 17, and even a CD-RW disk is an OS. File information can be recognized correctly.
[0111]
In this way, by erasing an error session for a disc such as a CD-RW disc capable of recording and erasing information, it is possible to avoid wasting unrecorded portion space.
[0112]
Next, in the processing according to claim 1 of the present invention described above, if the error session is the first session on the disk, there is no session immediately before the error session, so file information management is performed for the next new session. Cannot be recorded, and directory / file information is erroneously recognized on the OS.
[0113]
Therefore, in order to eliminate such a problem, a process according to claim 3 of the present invention in the CD-R / RW drive apparatus will be described.
[0114]
If an error occurs during recording of information for the first session, this processing is performed when a command for recording session management information (TOC) is received from the host computer in the session information management unit of the error session. After the session management information (TOC) of the error session is recorded, special data different from the file information management unit data is recorded on a track having a predetermined length for the next new session to complete the new session.
[0115]
FIG. 11 is a flowchart showing the processing according to the third aspect.
In this first dummy session recording process, it is determined whether or not there is a track in which a write error has occurred in step 31, and if there is, the process proceeds to step 32 to record the TOC of the error session and proceeds to step 33. The lead-out area of the error session is recorded, and the process proceeds to step 39 to determine whether or not the error session is the first session.
[0116]
If it is determined in step 39 that the error session is the first session, the process proceeds to step 34 where dummy data is set, the process proceeds to step 35, the track length is set to 300 sectors, the process proceeds to step 36, and a dummy track is recorded. The process proceeds to 37 to record the TOC area of the dummy session, and the process proceeds to step 38 to record the lead-out area of the dummy session, and this process ends.
[0117]
If it is determined in step 39 that the error session is not the first session, the process proceeds to step 40 to determine whether the data is ISO9660 format data. If it is not ISO9660 format data, this process is terminated. Proceeding to step 41, a new session recording process is executed, and this process ends.
[0118]
If it is determined in step 31 that there is no track in which a write error has occurred, the process proceeds to step 42 to record the TOC of the current session, and proceeds to step 43 to record the lead-out area of the current session. Exit.
[0119]
Next, the processing according to claim 3 of the present invention will be further described.
In this first dummy session recording process, when a command to close a session (Close Session Command) is received from the host computer, it is confirmed whether or not the session to which the track in which the write error has occurred belongs to the first session on the disc. If it is the first session, the file information management unit data in ISO 9660 format is not recorded after that session, but “00” data is recorded as dummy data on the track to create a dummy session.
[0120]
By this processing, an OS such as Windows 95 can determine that the inserted disk is equivalent to a blank disk, and can additionally write data in the remaining recording space on the disk.
[0121]
When the system controller 11 receives a command for closing a session (Close Session Command) from the host computer and there is a track in which a write error has occurred (S31), the TOC area of the session is recorded (S32), and the lead-out is performed. The (Lead-Out) area is recorded (S33). Thereafter, it is confirmed whether or not the session is the first session on the disc (S39).
[0122]
If the first session is determined in the above confirmation, dummy data consisting of “00” data is stored in the DRAM 5 (S34), and the track length is set to 300 sectors which is the minimum value of the CD-RW disc standard (S35). A dummy data track is recorded (S36).
[0123]
Thereafter, the TOC area of the dummy session is recorded (S37), the lead-out area is recorded (S38), and the dummy session recording process is terminated.
If the error session is not the first session in S39, the same processes S40 to S43 as in FIG. 5 are performed.
[0124]
Thus, as in the disc format shown in FIG. 12, since dummy data is recorded in the second session and the session is closed, the OS can determine that the file information management unit is not recorded in the final session, and blank. It can be handled in the same way as a disc.
[0125]
In this way, the file information management unit data is not recorded in the last session (a newly added dummy session) recorded on the disk, so that an OS such as Windows 95 may misrecognize directory / file information. Disappear. The OS can be handled in the same way as a blank disk.
[0126]
Next, in the processing according to claim 1 of the present invention described above, when the session immediately before the error session is a music session, there is no file information management unit in the session, so a new session immediately after the error session is created. The file information management unit cannot be recorded for the session, and directory / file information is erroneously recognized on an OS such as Windows 95 (registered trademark).
[0127]
Therefore, in order to eliminate such a problem, a process according to claim 4 of the present invention in the CD-R / RW drive apparatus will be described.
[0128]
In this process, if an error occurs during recording of information for a session after a music session (audio session) on the disc, session management information (TOC) is recorded in the session information management section of the error session. When a command to be received is received from the host computer, the session management information (TOC) of the error session is recorded, and then special data different from the file information management unit data is recorded on a track of a predetermined length for the next new session To complete the session.
[0129]
FIG. 13 is a flowchart showing the processing according to the fourth aspect.
In the second dummy session recording process, the address of the first (1st) track of the previous session is acquired in step 51, the process proceeds to step 52, the address of the file information management unit is set, and the process proceeds to step 53 to manage the file. The information is read, and the process proceeds to step 54 to determine whether or not the previous session is ISO9660 format data.
[0130]
If it is determined in step 54 that the previous session is ISO9660 format data, the process proceeds to step 55 to execute a recover track recording process, proceeds to step 56 to record the TOC of the recover session, and proceeds to step 57 to read out the recovery session ( The (Lead-Out) area is recorded, and this process ends.
[0131]
If it is determined in step 54 that the previous session is not ISO9660 format data, the process proceeds to step 58 to determine whether or not the previous session is an audio session. If the previous session is an audio session, the process proceeds to step 59 where dummy data is set. Proceed to set track length = 300 sectors, proceed to step 61 to record a dummy track, proceed to step 62 to record the TOC area of the dummy session, proceed to step 63 and read out the dummy session (Lead-Out) ) Record the area and end this process.
If it is determined in step 58 that the previous session is not ISO9660 format data, this process is terminated.
[0132]
Next, the processing according to claim 4 of the present invention will be further described.
In the second dummy session recording process, at the time of the recover session recording process, it is confirmed whether or not the session immediately before the error session is an audio session, and if it is an audio session, the dummy session is recorded after the error session.
[0133]
For example, a CD called CD-Extra exists in the world.
In this CD, the first session is an audio session (music session), the second session is a data session, normal music (Audio) playback is possible with an audio player (Audio Player), and images are played back on a personal computer. Music playback is possible. Of course, image data is recorded in the second session.
[0134]
Such a CD-Extra can be created by using a CD-R / RW drive device, but if a write error occurs in the second session, the image is not displayed on an OS such as Windows 95 due to the above-mentioned causes. Problems such as inability to play correctly may occur.
[0135]
In order to avoid the occurrence of this problem, it is necessary to record a dummy session after the second session so that the image data can be recorded correctly thereafter.
The dummy session is the last session, and “00” data is recorded in the track of the session, and the file information management unit is not recorded. Therefore, the OS does not need to refer to erroneous information.
[0136]
This second dummy session recording process is an improvement of the recovery session recording process of FIG.
The system controller 11 first reproduces the file information management unit of the previous session (S51 to S53) in the same manner as the recovery session recording process of FIG. 6 and then checks whether or not the session is an ISO9660 format disk (S54). ).
[0137]
If it is determined that the disc is not an ISO9660 format disc, it is confirmed whether the session is an audio session (S58).
If the audio session is determined in the confirmation (S58), dummy data consisting of “00” data is set in the DRAM 5 of the CD-R / RW drive device (S59), and the length of the dummy track is set to the minimum value of the CD standard. Are set to 300 sectors (S60), and a dummy track is recorded (S61).
[0138]
Thereafter, as a process for completing the dummy session, the TOC area of the dummy session is recorded (S62), the lead-out area is recorded (S63), and the process is terminated.
[0139]
If it is determined in step S58 whether the previous session is not ISO9660 format data or audio data, the process is terminated.
[0140]
Further, if it is determined whether the previous session is ISO9660 format data in the determination of whether it is ISO9660 format data (S54), the recovery session recording process is performed in the same manner as the process shown in FIG. 6 (S55-S57). Exit.
[0141]
Thus, since the dummy session is recorded after the error session as in the disc format shown in FIG. 14, the OS can determine that the disc is equivalent to the disc on which the audio (Audio) data is recorded, and the music (Audio) reproduction is performed. Can be done accurately.
[0142]
In this way, since file information management data is not recorded in the last session recorded on the disk, an OS such as Windows 95 does not erroneously recognize directory / file information.
In addition, the OS can be handled in the same way as a disc on which only music data is recorded.
[0143]
Next, if the power supply of this CD-R / RW drive device is shut down due to a power failure or the like while recording a track, the track is interrupted and the track information management unit (PMA) records. The disc is left unfinished and the session is still incomplete.
[0144]
Further, as described above, when there is a disc in which a track is recorded but there is no track information management unit (PMA) for the track, when the disc is inserted into the CD-R / RW drive, the CD-R / RW The RW drive device determines that the disc is an illegal disc, and neither recording nor reproduction is possible, and it is impossible to reproduce a file in a session that has been recorded before, and the data recorded in the past is apparently lost.
[0145]
Therefore, in order to solve such a problem, the process according to claim 5 of the present invention may be executed in the CD-R / RW drive apparatus.
[0146]
In this process, when it is determined that a track is recorded on the inserted disc but there is no track information management unit (PMA) for the track, the last address of the track is detected, and the track information management unit (PMA) is recorded, the session management information (TOC) is recorded for the session in which the track exists, and then the data of the file information management unit recorded in the session immediately before the error session for the next new session Copy the record.
[0147]
Further, for example, means for completing a session in which an illegal track exists on a disc such as a CD-R disc that can be recorded only once and recording the file information management unit of the session immediately before the error session in a new session. Although effective, a disc such as a CD-RW disc, on which information can be rewritten many times, wastes recording space.
[0148]
Therefore, in order to solve such a problem, the process according to claim 6 of the present invention may be executed in the CD-R / RW drive apparatus.
[0149]
This process detects the last address of a track without a track information management unit (PMA) for a disc on which information can be recorded and erased, and records an illegal track without recording the track information management unit (PMA). Erase.
[0150]
FIG. 15 is a flowchart showing processing according to claims 5 and 6.
This disk information acquisition process is a mount process when a disk is inserted into the CD-R / RW drive device, and is a process that takes into account when a track whose track information is not recorded in the PMA is detected.
[0151]
Such a track is generated because the TOC area could not be recorded due to a power interruption or the like during the data write process.
Therefore, when the track is detected at the time of mounting, the track is recovered to complete the session, and the next recover session is recorded.
[0152]
In this disc information acquisition process, it is determined in step 71 whether or not it is a stamp disc. If it is not a stamp disc, the process proceeds to step 72 to reproduce the TOC, proceeds to step 73 to reproduce the PMA, and proceeds to step 74. Then, the program area is reproduced, and the process proceeds to step 75 to determine whether or not there is a track not in the PMA.
[0153]
If it is determined in step 75 that there is no track that does not exist in the PMA, this process is terminated. If there is a track that does not exist in the PMA, the process proceeds to step 76 where the final address of the track is detected, and the process proceeds to step 77 where CD It is determined whether or not the disc is a RW disc, and if it is a CD-RW disc, the process proceeds to step 78 to execute an illegal track erasing process, and this process is terminated.
[0154]
If the disc is not a CD-RW disc in step 77, the process proceeds to step 80 to record the PMA, proceeds to step 81 to record the TOC of the unauthorized session, and proceeds to step 82 to read out the unauthorized session (Lead-Out). ) Record the area, and proceed to Step 83 to determine whether or not the illegal track data is ISO9660 format data.
[0155]
If it is determined in step 83 that the illegal track data is not ISO9660 format data, this process is terminated. If the illegal track data is ISO9660 format data, the recover session recording process shown in FIG. This process ends.
If it is determined in step 71 that the disc is a stamp disc, the process proceeds to step 79 to reproduce the TOC, and the process is terminated.
[0156]
Next, the processing according to claims 5 and 6 will be further described.
The system controller 11 first checks whether the inserted disc is a stamp disc (S71).
[0157]
This is determined by whether or not the preformatted ATIP of the CD-R / RW disc on the disc can be detected.
If it is determined that the disc is a stamp disc (S71), the TOC of the first session is reproduced, and if it is a multi-session, the TOC of each session is reproduced to obtain session information. (S79).
[0158]
That is, since the stamp disc does not have PMA, the track information is obtained by TOC reproduction and the mounting process is terminated.
[0159]
If it is determined whether or not the disc is a stamp disc (S71), the TOC reproduction is executed as a CD-R / RW disc using the same process as the stamp disc (S72).
[0160]
Thereafter, the PMA specific to the CD-R / RW disc is reproduced (S73), and the mode, start address, end address, etc. of each track are confirmed.
[0161]
Next, the outside of the last address of the last track recorded in the PMA is reproduced (program area reproduction) (S74), and it is confirmed whether there is a track not recorded in the PMA (S75).
[0162]
If it is determined in step S75 whether or not there is a track that is not in the PMA, it is determined by detecting the reproduction signal how far the track has been recorded (S76). Then, the final address at which the reproduction signal can be detected is set as the end address of the track (S76).
[0163]
Next, it is determined whether or not the inserted disc is a CD-RW disc (S77). If it is a CD-RW disc, the illegal track is erased (S78), and this processing is terminated.
If it is determined whether there is a track that is not in the PMA (S75) and a track that is not recorded in the PMA cannot be detected in the program area, it is determined that the disc is a normal disc, and the disc information mounting process is terminated.
[0164]
If it is determined whether or not the disc is a CD-RW disc (S77), track information such as address information of an illegal track is recorded in the PMA (S80). The TOC area of the session to which the track belongs is recorded (S81), the lead-out area is recorded (S82), and it is confirmed whether or not the data recorded in the illegal track is ISO9660 format data (S83). ).
[0165]
This confirmation means continuously reproduces from the LBN 16 (logical address 16) address of this track, and if the PVD, SVD, and terminator identifiers can be detected, it is determined as ISO 9660 format data.
[0166]
If it is determined whether or not the data of the illegal track is ISO9660 format data (S83), the recovery session recording process (S83) is to copy and record the file information management unit of the session immediately before the illegal session in the next session. S84) is executed, and this process is terminated.
[0167]
If it is determined whether the illegal track data is ISO9660 format data (S83) and the illegal track data is not ISO9660 data, the mounting process is immediately terminated.
[0168]
In this way, the session in which the illegal track exists is completed, and the file information management unit of the session immediately before the error session is recorded in the new session, so that not only the illegal disc can be recorded and reproduced, but also the past. The recorded file can be reproduced from an OS such as Windows 95.
[0169]
Further, by erasing illegal tracks on a disc such as a CD-RW disc capable of recording and erasing information, it is possible to avoid wasting unrecorded space.
[0170]
【The invention's effect】
As described above, according to the information recording / reproducing apparatus of the present invention, when a write error occurs during data recording, it is possible to perform error processing so that no trouble occurs during subsequent data reproduction.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a CD-R / RW drive apparatus which is an embodiment of an information recording / reproducing apparatus of the present invention.
FIG. 2 is a diagram showing a session format of the disk 17 shown in FIG.
FIG. 3 is a format of a track recorded by a track-at-once method.
FIG. 4 is an ISO9660 file format diagram.
5 is a flowchart showing processing according to claim 1 of the present invention in the CD-R / RW drive apparatus shown in FIG. 1. FIG.
FIG. 6 is a flowchart showing a recovery session recording process of FIG. 5;
FIG. 7 is a diagram illustrating a disk format example of an error session.
8 is a diagram showing a disk format example of a disk on which the process shown in FIG. 5 has been performed.
9 is a flowchart showing processing according to claim 2 of the present invention in the CD-R / RW drive apparatus shown in FIG. 1. FIG.
10 is a diagram showing a disk format example of a disk on which the process shown in FIG. 9 has been performed.
11 is a flowchart showing processing according to claim 3 of the present invention in the CD-R / RW drive apparatus shown in FIG. 1; FIG.
12 is a diagram showing a disk format example of a disk that has been subjected to the processing shown in FIG. 11. FIG.
13 is a flowchart showing processing according to claim 4 of the present invention in the CD-R / RW drive apparatus shown in FIG. 1. FIG.
14 is a diagram showing a disk format example of the disk subjected to the processing shown in FIG.
15 is a flowchart showing processing according to claims 5 and 6 of the present invention in the CD-R / RW drive apparatus shown in FIG. 1. FIG.
[Explanation of symbols]
1: CPU 2: Flash ROM
3: Host interface controller
4: Buffer manager 5: Dynamic RAM
6: Subcode operation controller
7: CD-ROM encoder 8: SRAM
9: CD-ROM decoder 10: Audio circuit
11: System controller 12: CD encoder
13: CD decoder 14: Servo circuit
15: Spindle motor controller
16: SCSI bus 17: Disk
20: Power calibration area (PCA)
21: Track information manager (PMA)
22: Recording category (session)
23: Session information management area (lead-in area)
24: Track
25: Recording section last area (lead-out area)
26: Program area 30: Pre-gap
31: User data part 32: Run-out block
33: Link block 34: Run-in block

Claims (6)

In an information recording / reproducing apparatus for recording and reproducing information such as a file in a series of data block groups on a recording medium capable of recording and reproducing information,
If a write error occurs while recording information on a predetermined session of the recording medium and track recording fails , the session immediately after the session in which the write error has occurred after recording session management information The file information management unit data recorded in the session immediately before the session in which the write error has occurred is provided only when the file is recorded in a predetermined file format. Information recording / reproducing apparatus. The information recording / reproducing apparatus according to claim 1 ,
Means for determining whether the recording medium is a recording medium that can rewrite information or a recording medium that can be recorded only once, and if the recording medium is determined to be a recording medium that can rewrite information, the track in which the write error has occurred is determined. An information recording / reproducing apparatus provided with means for erasing. The information recording / reproducing apparatus according to claim 1,
When a write error occurs during recording information on the first session of the recording medium occurs, when receiving a command to record a session management information in the session information management unit of the session in which the write error has occurred from the host apparatus After the session management information is recorded, there is provided means for recording the special data different from the data recorded in the file information management unit on a track having a predetermined length of the next new session and completing the new session. A characteristic information recording / reproducing apparatus. The information recording / reproducing apparatus according to claim 1,
A command for recording session management information in the session information management unit of the session in which the write error has occurred from the host device when a write error occurs during recording of information for a session after the music session of the recording medium Means for recording the session management information and recording special data different from the data to be recorded in the file information management unit on a track of a predetermined length of the next new session and completing the new session. An information recording / reproducing apparatus provided. In an information recording / reproducing apparatus for recording and reproducing information such as a file in a series of data block groups on a recording medium capable of recording and reproducing information,
When the recording medium is inserted, when the error session in which the track is recorded on the recording medium but the track management information for the track is not recorded in the track information management unit is determined, the final address of the track is detected. The track management information is recorded in the track information management unit based on the final address, the session management information is recorded in the session information management unit of the session in which the track exists, and then recorded in the session immediately before the error session. An information recording / reproducing apparatus comprising means for copying and recording data stored in a file information management unit in a next new session. The information recording / reproducing apparatus according to claim 5 .
When it is determined that the recording medium is a recording medium on which information can be rewritten or a recording medium on which recording can be performed only once, and a recording medium on which information can be rewritten by the means , a track is recorded on the recording medium. However, when an error session in which track management information for the track is not recorded in the track information management unit is determined, the final address of the track is detected and the track management information based on the final address is stored in the track information management unit. An information recording / reproducing apparatus comprising means for erasing an illegal track without recording.

Images