JPH1166751A - Information recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to correctly reproduce later without wasting recording space, information which may not be reproducible in the future due to change with the lapse of time and deterioration, by alternately recording reproducible information by means of reproduction retry processing in an alternation packet area when reproduction error occurs at a time of reproducing the information. SOLUTION: A system controller 20 performs an alternate record of information reproducible by reproduction retry processing in an alternate packet area provided in the most outer peripheral part of an optical disk 2 when reproduction error occurs at a time of reproducing information recorded in an arbitrary packet on the rewritable optical disk 2. In this case, original and alternate address information of information recorded in an alternate packet area are recorded. Moreover, when a reproduction error is a disk error dependent on a state of an optical disk 2, retry processing is repeated a predetermined times. When the optical disk 2 is a rewritable disk such as a CD-RW disk, etc., packet information of the reproduction error is processed by overwriting on the same packet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording / reproducing device such as a CD-R drive device and a CD-RW drive device for recording and reproducing information on and from a track composed of a plurality of packets on an optical disk.

[0002]

2. Description of the Related Art Information recording / reproducing devices such as a CD-R drive device and a CD-RW drive device include CD-R and CD-R.
Packet write (Pa) for recording information divided into units called packets on tracks on an optical disk such as RW.
A ticket writing (Recording) recording method and a track-at-once (Tr) recording information on a track at a time.
ack At Once) recording system.

When information is recorded on an optical disk by using the track-at-once recording method, if the work efficiency of the system of the information recording / reproducing device is low or if a hard disk device having a complicated directory structure is used, a buffer underrun occurs. Buffer Under Ru
n) In some cases, an error occurred and information could not be recorded to the end of the track.

[0004] However, even with the above problems, the buffer underrun error is unlikely to occur because the packet size at the time of recording is considerably smaller than the track.
With the provision of a packet write application that enables file data to be recorded in the same manner as a floppy disk, usability has been improved and demand for a packet write recording system has been increasing.

In the conventional information recording / reproducing apparatus, during reproduction of packet information, dust or scratches on the optical disk, defects of the optical disk, deterioration due to aging of the optical disk, and recording power that was not recorded with an accurate recording power during recording. When a data error such as an EDC error that cannot be corrected due to a large number of data errors due to an abnormality or the like occurs, a reproduction retry is executed to increase a reproduction rate. Also, instead of a simple retry, the reproduction is attempted while increasing the gain of the reproduction signal or changing the servo characteristics.

In the case of a read-only CD, the same information is recorded at a plurality of locations, and when an error is detected during reproduction, an information recording / reproducing apparatus (for example, the same information) recorded at another location is reproduced. JP-A-62-2
293277).

[0007]

However, in the conventional information recording / reproducing apparatus, the ED
When a data error such as a C error occurs, a reproduction retry is executed, a gain of a reproduction signal is increased,
Even if reproduction was attempted by changing the servo characteristics, reproduction could not be performed in the future due to aging or deterioration of the optical disk.

Further, in the same manner as the above-mentioned CD, the CD
-When the same information is recorded at a plurality of locations on an optical disc such as an R disc or a CD-RW disc, and when a reproduction error occurs, the same information is read from another location. This wastes the recording space on the optical disk, thereby deteriorating the information recording efficiency.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is possible to store information which may become unreproducible in the future due to aging or deterioration on a writable optical disk without wasting recording space. The purpose is to be able to play back correctly.

[0010]

According to the present invention, there is provided an information recording / reproducing apparatus for recording and reproducing information on and from a track comprising a plurality of packets on a writable optical disk. A replacement packet area is provided at the outermost peripheral portion, and when a reproduction error occurs during reproduction of information recorded in an arbitrary packet on the optical disk, information reproducible by reproduction retry processing is recorded in the replacement packet area. This is provided with a replacement packet processing means.

The replacement packet processing means may include means for recording replacement source and replacement address information of the information replacement-recorded in the replacement packet area.

Further, the replacement packet processing means includes means for, when the reproduction error is a disk error dependent on the state of the optical disk, recording information reproducible by a predetermined number or more of reproduction retry processing in the replacement packet area. It is good to provide.

In an information recording / reproducing apparatus for recording and reproducing information on and from a track composed of a plurality of packets on a writable optical disk, a replacement packet area is provided at an outermost peripheral portion on the optical disk, When a reproduction error occurs during the reproduction of information recorded in an arbitrary packet, if the optical disk is a write-once optical disk, information that can be reproduced by a reproduction retry process is alternately recorded in the alternative packet area, and the optical disk is rewritten. In the case of an optical disk that can be used, it is preferable to provide a replacement packet processing unit that overwrites information of a packet having a reproduction error on the same packet.

Further, the replacement packet processing means is provided with a means for reproducing the information of the overwritten packet under a predetermined reproduction condition and recording the information in the replacement packet area when a reproduction error occurs. Good.

Further, it is preferable to provide a means for generating a warning when the usage rate of the replacement packet area exceeds a predetermined value.

In the information recording / reproducing apparatus according to the first aspect of the present invention, a replacement packet area is provided at the outermost periphery on a writable optical disk, and a reproduction error occurs when reproducing information recorded in an arbitrary packet on the optical disk. When it occurs,
Since information that can be reproduced by the reproduction retry processing is alternately recorded in the above-mentioned alternate packet area, information of a packet that is difficult to reproduce due to deterioration of recording quality or the like can be automatically re-recorded in another area, and the same contents in advance can be recorded. It is possible to avoid wasting a recording space for recording a plurality of pieces of information, and to correctly reproduce information that might not be able to be reproduced in the future due to aging or deterioration of the optical disc.

In the information recording / reproducing apparatus according to a second aspect of the present invention, since the replacement source and replacement address information of the replacement-recorded information is recorded in the replacement packet area, an optical disk is inserted and the host computer is inserted. Even when the information of the address specified by the reproduction command from the replacement is recorded, the replacement destination can be correctly accessed and reproduced.

Further, in the information recording / reproducing apparatus according to a third aspect of the present invention, when the reproduction error is a disk error depending on the state of the optical disk, the information which can be reproduced by the reproduction retry process more than a predetermined number of times is stored in the replacement packet area. Replacement recording, so that replacement processing of information that is difficult to reproduce due to an error depending on hardware or communication state can be prevented from being performed, and unnecessary packet processing can be avoided by useless replacement processing. .

According to a fourth aspect of the present invention, there is provided an information recording / reproducing apparatus wherein when a reproduction error occurs during reproduction of information recorded in an arbitrary packet on the optical disk, the reproduction is performed when the optical disk is a write-once optical disk. Information that can be reproduced by retry processing is alternately recorded in the alternate packet area,
When the optical disk is a rewritable optical disk, the information of a packet having a reproduction error is overwritten on the same packet. Therefore, the recording quality of information that is difficult to reproduce even on a rewritable optical disk without using a replacement packet area is improved. The occurrence of a reproduction error can be prevented. In addition, it is not necessary to access the spare packet area provided on the outermost periphery of the optical disc at the time of reproduction after the replacement recording, and it is possible to prevent the seek time at the time of reproduction from becoming long.

Further, the information recording / reproducing apparatus according to claim 5 of the present invention reproduces the information of the overwritten packet under a preset reproduction condition and, when a reproduction error occurs, stores the information in the replacement packet area. Since recording is performed, when a reproduction error occurs even after overwriting due to a defect in the packet area, it can be automatically re-recorded in another area, and the reliability of replacement recording can be improved.

Further, the information recording / reproducing apparatus according to claim 6 of the present invention generates a warning when the usage rate of the replacement packet area exceeds a predetermined value, so that the user can use the entire replacement packet area. Information can be notified before the information is backed up.

[0022]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a CD-RW drive device as one embodiment of the information recording / reproducing device of the present invention.

The CD-RW drive device 1 is connected to a host computer (not shown) via a SCSI interface so as to be able to perform data communication, and is mounted on a writable optical disk 2 such as a CD-R disk or a CD-RW disk. The information recording / reproducing apparatus records information received from a host computer on a track composed of a plurality of packets, reproduces information recorded on an optical disk 2, and transmits the reproduced information to a host computer.

The inside of the CD-RW drive device 1 has a CP
U10, flash ROM 11, host interface (I / F) controller 12, buffer manager 13, DRAM 14, subcode operation controller 15, CD-ROM encoder 16, SRAM1
7, CD-ROM decoder 18, audio controller 19, system controller 20, CD encoder 2
1, a CD decoder 22, a servo 23, a spindle motor controller 24 and the like.

The CPU 11 is a central processing LSI which is a microcomputer for controlling all operations of the CD-RW drive 1. The flash ROM 11 stores C
The PU 10 is an erasable and rewritable nonvolatile memory, and stores programs and the like for the CPU 10 to execute various processes.

The host interface controller 12
An LSD that manages data communication with a host computer via a CSI interface. Buffer manager 1
An LSI 3 controls transfer of information from the host computer and transfer of information read from the optical disk 2 to the host computer.

The DRAM 14 is a memory for temporarily storing information transferred from the host computer and information read from the optical disk 2. The subcode operation controller 15 is an LSI that generates subcodes (SUBP, Q, R,..., W) to be recorded on the optical disc 2 and separates subcodes read from the optical disc 2.

The CD-ROM encoder 16 modulates the LS before writing CD-ROM data on the optical disc 2.
I. The SRAM 17 is a memory for storing program variables and the like. The CD-ROM decoder 18 is an LSI for demodulating the reproduced CD-ROM data.

The audio controller 19 is an LSI for controlling reproduction of music data. The system controller 20 is an LSI that executes processing according to the present invention, such as control of recording and reproduction of information on the optical disk 2, packet replacement processing during packet reproduction, and processing for managing the remaining amount of a replacement packet area.

The CD encoder 21 is an LSI that modulates user data and subcodes so as to conform to the disc standard before recording information on the optical disc 2. The CD decoder 22 is an LSI that separates information reproduced from the optical disc 2 into user data and subcodes and demodulates them.

The servo 23 is an LSI for controlling a tracking servo and a focus servo of a laser beam by a laser light source at the time of recording and reproducing information on the optical disk 2.
The spindle motor controller 24 is an LSI that controls the rotation of the optical disc 2.

Next, the format of the recording area of the writable optical disk 2 used in the CD-RW drive 1 will be described. FIG. 2 is a diagram showing a format of a recording area of a normal optical disk, and FIG.
FIG. 3 is a diagram showing a format of a recording area of an optical disc 2 used in the -RW drive device 1.

The recording area of a normal optical disk has a format as shown in FIG. 2, and a power calibration area (PCA) 30 is an area for calibrating the recording power. The program memory area (PMA) 31 is an area for recording track information. The lead-in area 32 is an area indicating the beginning of the session 36, and records track information (TOC) in the session 36.

The track 33 is an area where the user records information such as files and music. The lead-out area 34 is an area indicating the end of the session 36.
The program area 35 is an area for recording user data. The session 36 is one unit including a lead-in area 32, one or more tracks 33, and a lead-out area 34.

On the other hand, the format of the recording area of the optical disk 2 is basically the same as the format shown in FIG. 2, as shown in FIG. 40 are provided. The replacement packet area 40 is a replacement area in which information that is difficult to reproduce on the optical disk 2 is recorded again, and includes a replacement packet address management unit 41 and a replacement packet data area 42.

The replacement packet address management section 41 is an area for managing a replacement source address and a replacement destination address. These pieces of information are recorded in subcodes, and are recorded in units of 10 sectors. In other words, this is an area for recording the address information of the replacement source packet of the information alternately recorded in the replacement packet data area 42 of the replacement packet area 40 and the address information of the replacement destination in the replacement packet data area 42. The replacement packet data area 42 is an area for alternately recording information that is difficult to reproduce on the optical disc 2.

Next, a method of recording information on the writable optical disk 2 in the CD-RW drive 1 will be described. As the recording method, there are two types, a track-at-once recording method and a packet write recording method.

The track-at-once recording method is a method for recording information in a format as shown in FIG.
It is necessary to record the user data section 51 at a stretch. The pre-gap section 50 is composed of 150 blocks or 225 blocks, and is located at the head of the track, and indicates, for example, a silent section in the case of music data. Link block 53
Is composed of one block and means a joint between tracks. The run-in block 54 is composed of four blocks and indicates the beginning of a track.

The user data section 51 is an area for recording information transferred from the host computer. The run-out block 52 is composed of two blocks and indicates the end of the track.

On the other hand, in the packet write recording method, as shown in FIG.
And a method of recording information for each packet.
The packet 62 is a group of sectors existing in the track, and the minimum is one sector. Each packet 62 is 1
It comprises a link block 70 of blocks, a run-in block 71 of four blocks, a user data part 72, and a run-out block 73 of two blocks.

In the packet write recording method, the number of sectors to be recorded at one time is smaller than that in the track-at-once recording method (less than the memory size of the CD-RW drive device). There is a merit that a buffer underrun error hardly occurs. Another advantage is that it can be handled like a floppy disk. Therefore, the CD-RW drive device 1 employs a packet write recording method.

Next, a description will be given of a process of reproducing information from the writable optical disk 2 in the CD-RW drive device 1. In the CD-RW drive device 1,
If the information of the packet recorded on the optical disk 2 cannot be normally reproduced, a system error may occur, or the reproduction process may take too long to issue a reset from the host computer system, resulting in an error in the reproduction process.
Such a reproduction error often depends on the information quality of the packet, and there are many errors such as an error that cannot be corrected and a sector address that cannot be normally detected due to a small reproduction signal amplitude.

When an error occurs during reproduction of information on a track recorded by using the packet write recording method, the CD-RW drive 1 places the information reproduced by the reproduction retry process on the outermost periphery of the optical disk 2. By executing packet replacement processing for performing replacement recording in the provided replacement packet area, the reproduction quality of information on the optical disk 2 is improved.

That is, the system controller 20
Means for recording and reproducing information on and from a track composed of a plurality of packets on the optical disc 2, and a spare packet area provided on the outermost periphery of the optical disc 2 to record information in an arbitrary packet on the optical disc 2. When a reproduction error occurs during the reproduction of the reproduced information, the function of a replacement packet processing means for performing replacement recording of information reproducible in the reproduction retry process in a replacement packet area is performed.

The function of means for recording the replacement source address and replacement destination address information of the replacement information recorded in the replacement packet area is also achieved. Further, when the reproduction error is a disk error that depends on the state of the optical disk, it also functions as a means for alternatively recording information that can be reproduced by retry processing a predetermined number of times or more in the alternate packet area.

When a reproduction error occurs during reproduction of information recorded in an arbitrary packet on the optical disc 2,
When the optical disc 2 is a write-once optical disc such as a CD-R disc, information reproducible by retry processing is alternately recorded in a spare packet area. When the optical disc 2 is a rewritable optical disc such as a CD-RW disc, a reproduction error occurs. It also functions as a replacement packet processing unit that overwrites information of a packet on the same packet.

Further, when the information of the overwritten packet is reproduced under preset reproduction conditions and a reproduction error occurs, the function of a means for recording the information in the replacement packet area is also achieved. Furthermore, it also functions as a means for generating a warning when the usage rate of the replacement packet area exceeds a predetermined value.

Next, the format of the replacement packet area provided at the outermost periphery of the optical disk 2 will be described.
FIG. 6 is a diagram showing a format of the replacement packet area. The replacement packet area 40 includes a replacement packet address management unit 41 and a replacement packet data area 42.

The replacement packet address management unit 41 stores the replacement source address of the replacement-recorded information, that is, the start address and the last address of the packet of the information in which the reproduction error has occurred, and the replacement destination address, that is, the replacement packet. The start address and the end address of the alternately recorded packet are recorded in the data area. In the replacement packet data area 42, information indicating that a reproduction error has occurred is recorded.

For example, when the replacement packet 1 is recorded in the replacement packet data area, the replacement packet address management unit includes a replacement address consisting of a start address and a last address of a packet in which a reproduction error has occurred, and a start address and a last address of the replacement packet 1. Record packet 1 information.

FIG. 7 shows the replacement packet address management unit 41.
FIG. 3 is a diagram showing a data format of FIG. In the replacement packet address management unit 41, “ADR” which is set to “1” when indicating replacement packet information, “CTRL” of 0100b,
No. of the replacement packet of what number "PN"
O, “POINT” which is “0” indicating replacement source information or “1” indicating replacement destination information, and “MIN, SE” indicating start addresses (start times) of the replacement source and the replacement destination.
C, FRAME "," PMIN, PSEC, PFRAME "indicating the end addresses of the replacement source and the replacement destination, and" CRC "of the error correction data.

These data are recorded in a sub-code (Sub Q Channel) on the optical disk 2, and are mounted after the optical disk 2 is inserted, and the CS-data is read before the reproduction.
It is automatically reproduced by the RW drive device 1.

For example, the start address and the stop address of the replacement source are respectively set to "10 minutes 23 seconds 72 frames".
And “10 minutes 25 seconds 72 frames” (packet size 2
Second: 150 sectors), and the start address and the stop address of the replacement destination are set to “65:00:00 frame” and “65:02:00 frame”, respectively, to generate data to be recorded in the replacement packet address management unit 41. It looks like this:

The replacement source address is ADR "1", PNO
"1", POINT "1", MIN "10", SEC
"23", FRAME "72", PMIN "10", P
SEC "25" and PFRAME "72".

The replacement address is ADR "1", PNO
"1", POINT "1", MIN "65", SEC
"00", FRAME "00", PMIN "65", P
SEC “02” and PFRAME “00”. These are alternately recorded in the alternate packet address management unit 41 as a total of 10 sectors.

Next, a packet reproduction process for the writable optical disk 2 such as a CD-R disk and a CD-RW disk in the CD-RW drive device 1 will be described. FIG. 8 is a flowchart showing the processing.

In this process, the address and transfer length of the packet to be reproduced are received from the SCSI read command received from the host computer via the SCSI interface in step (indicated by “S” in the figure) 1, and the program variable Number of playback retries X as initialization processing of
Is set to "0", the disk error flag is set to "0" in step 3, the information of the packet of the address set in the received command is reproduced in step 4, and the process proceeds to step 5.

In step 5, it is determined whether or not a reproduction error has occurred. If a reproduction error has occurred, in step 6, it is determined whether or not the disk error depends on the disk state.
If a disk error has occurred, "1" is set in the disk error flag in step 7, and in step 8, the number of reproduction retries X
Is greater than or equal to a predetermined value MAX which is a preset maximum number of retries.

Here, for example, assuming that the predetermined value MAX = 2, since X is initially 0, it becomes smaller than the predetermined value MAX in step 8, and in step 10, "1" is added to the number X of reproduction retries. To set the playback retry conditions for the playback retry process, return to step 4, execute the first playback retry process, and store the information that could be played back by the playback retry in the DRAM.

In this way, the reproduction retry process is repeated, and if the number X of reproduction retries is equal to or more than the predetermined value MAX in the judgment of step 8, the reproduction is impossible even if the reproduction retry process for the maximum number of retries is performed. Then, the details of the reproduction error are set in the error code, and the packet reproduction process ends abnormally.

If it is determined in step 8 that the number X of reproduction retries is not equal to or greater than the predetermined value MAX, "1" is added to the number X of reproduction retries for the next reproduction retry processing in step 10, and the reproduction is performed in step 11. The reproduction retry condition is set for the retry processing, the flow returns to step 4, the reproduction retry processing is executed, and the information reproduced by the reproduction retry is stored in the DRAM.

The setting of the reproduction retry condition includes setting to increase the gain of the reproduction signal read from the optical disk 2 according to the content of the error, and setting the focus offset value, the track offset value, the reproduction laser power value to the servo LSI. Etc. are the servo parameters for reproduction retry.

If it is determined in step 6 that there is not a disk error but a reproduction error other than a disk error that depends on the disk state, such as a communication error on the SCSI interface, a mechanical error, and a fatal H / W error, In step 9, a detailed error code is set, and this packet reproduction process is abnormally terminated.

If it is determined in step 5 that a reproduction error has not occurred, the disk error flag is set to "1" in step 12.
It is determined whether or not is set. Here, the reason for checking the disk error flag is to determine whether or not a reproduction retry process due to a disk error has occurred.

If the disc error flag is not set to "1" in the judgment at the step 12, the packet reproducing process ends normally. If "1" is set in the disk error flag in the determination in step 12, it is determined in step 13 whether or not the number of reproduction retries X is equal to or greater than a predetermined value N1 of the condition for the alternate recording. If the value is smaller than the value N1, the packet reproduction process ends normally.

In the judgment of step 13, the number of reproduction retries X
Is greater than or equal to the predetermined value N1, the start address and the last address (alternate address) of the packet in which the reproduction error has occurred are checked in step 14, and in step 15, it is determined whether or not there is a portion not reproduced in the original packet. Is confirmed, and if there is an unreproduced portion, the information of the remaining unreproduced portion is reproduced and read into the DRAM.

Then, in step 16, the information stored in the DRAM (all information in the packet including the information reproduced by the reproduction retry process) is alternately recorded in the alternate packet data area of the alternate packet area. The start address and the last address of the replacement source packet and the start address and the last address (alternate address) of the packet in the replacement packet data area of the replacement destination are recorded in the replacement packet address management unit of the area.

In step 18, it is determined whether or not the replacement recording process has been completed normally. If an error occurs, a detailed error code is set in step 9 and this packet reproduction process is abnormally terminated, and an error occurs. If not, the packet reproduction process is normally terminated.

As described above, the CD-R disc and the CD
-The information of the packet, which is difficult to reproduce during the reproduction on the RW disc and may become unreproducible in the future due to the aging or deterioration of the optical disc, is alternately recorded in the alternate packet area, so that the information on the optical disc can always be correctly reproduced. Recording quality can be maintained, and the reliability of information recording can be improved.

Further, at the time of replacement recording, the replacement source address information and the replacement destination address information are recorded in the replacement packet address management unit. Therefore, even when the optical disk is replaced and inserted again, the replacement destination information is correctly recognized. It is possible,
Even if the information of the address specified by the reproduction command from the host computer is alternately recorded in the alternate packet area, the alternate destination can be correctly accessed and reproduced.

Further, if replacement recording is performed only when a disk error that depends on the state of the disk occurs, replacement recording can be performed when an error such as a hardware error or a communication error has no relation to the recording quality of information. It is possible to prevent the replacement packet area from being wasted.

Next, in the above-described packet replacement processing, the CD
Although the R-disk and the CD-RW disk are recorded alternately in the replacement packet area, the CD-RW disk can overwrite information up to 1000 times at maximum, so that the information of the packet is recorded in poor quality due to insufficient adjustment of the recording power. If the reproduction error is liable to occur because of the badness, if the same packet area is overwritten again, the replacement packet area can be saved, and the recording quality is higher than before so that the reproduction error can be reduced. .

Therefore, in the above-described packet replacement process, since overwriting is impossible on a CD-R disc, replacement recording is preferably performed on a replacement packet area, and replacement recording is performed by overwriting the same packet on a CD-RW disc. In this way, for a CD-RW disc, the processing time at the time of replacement recording can be shortened, and at the time of reproduction after replacement, an increase in processing time due to a seek operation to a replacement packet area can be prevented.

Further, if the overwriting of the same packet fails, or if an error occurs again when the overwritten information is reproduced, the packet may have a defect. Therefore, replacement recording is preferably performed in the replacement packet area.

Next, in the CD-RW drive device 1, a process of alternately recording in a spare packet area for a CD-R disc and overwriting the same packet on a CD-RW disc for alternate recording will be described. explain. FIG. 9 is a flowchart showing the processing.

In this process, the start address and the last address of the packet in which the reproduction error has occurred are confirmed in step 21, and in step 22, the packet in the packet in which the reproduction error has occurred is determined based on the address of the reproduction command received from the host computer. Calculate the address of the remaining unplayed sector,
The remaining sector is reproduced, and all information on the packet in which a reproduction error has occurred is stored in the DRAM.

In step 23, it is determined whether the inserted optical disk is a CD-RW disk or not.
If the disc is not a RW disc but a CD-R disc, the process proceeds to step 29.

If the disc is a CD-RW disc in the judgment in step 23, the information stored in the DRAM in step 24 is overwritten (overwritten) on the packet in which the reproduction error has occurred.
Then, it is determined in step 25 whether a write error has occurred due to the overwriting process.
Proceed to step 29.

If a write error does not occur in the determination in step 25, reproduction conditions such as a reproduction signal gain and servo parameters are set in step 26, and in step 27, the information of the packet overwritten by the reproduction conditions is reproduced. It is determined in step 28 whether or not a reproduction error has occurred. If no reproduction error has occurred, the packet replacement process is terminated, and if a reproduction error has occurred, the process proceeds to step 29.

In step 29, the information stored in the DRAM is alternately recorded in the alternate packet data area of the alternate packet area, and in step 30, the replacement source address (the packet in which the reproduction error occurred) is stored in the alternate packet address management section of the alternate packet area. Of the replacement packet data area and the start address and the last address of the replacement packet data area in the replacement packet data area, and determine in step 31 whether a write error has occurred in the replacement packet area. to decide.

If a write error is determined in step 31,
In step 32, a detailed error code is set, and this packet replacement process ends abnormally. If no write error occurs, this packet replacement process ends normally.

As described above, for the CD-RW disc, the information of the packet in which the reproduction error has occurred is overwritten in the same packet area to perform the alternate recording, so that the recording quality can be improved without using the alternate packet area. Can be improved. Further, not only does not need to use the replacement packet area, but also unnecessary seek time generated by reproducing the replacement packet area can be omitted, and the information after replacement can be quickly reproduced.

Further, even if information is overwritten on a packet in which a reproduction error has occurred, when a reproduction error occurs again, the packet area is determined to be defective and automatically recorded in the replacement packet area. The reliability of storage can be improved.

Next, when the entire replacement packet area on the optical disk is used, the replacement recording process at the time of the subsequent reproduction error becomes impossible, and the reliability of the reproduction of the optical disk deteriorates. Therefore, it is preferable to manage the remaining amount of the spare packet area, warn the user when the remaining spare packet area becomes low, and encourage the user to back up the information on the optical disk.

Next, the remaining amount management processing of the replacement packet area will be described with reference to the flowchart of FIG. In this process, when an error of the replacement condition occurs during the playback, the replacement packet address management unit in the replacement packet area is played back in step 41, the warning flag is set to "0" in step 42, and half of the initialization is executed. Then, in step 43, the number of remaining sectors in the replacement packet data area is calculated, and in step 44, it is determined whether or not the replacement packet data area is fully used.

If it is determined in step 44 that the replacement packet data area is fully used, an error code indicating that replacement is impossible is set in step 50, and this processing is terminated.
Then, the set error code is transmitted to the host computer, and the host computer displays a warning indicating to the user that the replacement packet data area is insufficient based on the error code.

If it is determined in step 44 that the replacement packet data area is not fully used, it is determined in step 45 whether or not the remaining sectors are equal to or smaller than a predetermined value N2 indicating a preset minimum amount. That is, in this step, it is checked whether or not the usage rate of the replacement packet area exceeds the usage rate set in advance and the remaining amount is low. Predetermined value N2
Is a threshold value for notifying the host computer that the remaining space in the replacement packet data area has run out, and it is preferable to set a remaining amount that allows replacement recording of at least several packets.

If it is determined in step 45 that the remaining sectors are not equal to or smaller than the predetermined value N2, the replacement recording process is executed in step 47, and the process proceeds to step 48, where the remaining sectors are set to the predetermined value N2.
If it is not more than 2, the warning flag is set to "1" in step 46, the replacement recording process is executed in step 47, and step 48
Proceed to.

In step 48, it is determined whether or not the warning flag is "1". If the warning flag is not "1", the replacement recording process is terminated normally. If the warning flag is "1", step 4 is executed.
In step 9, a warning error code indicating that the usage rate exceeds the preset usage rate and the remaining amount is small is set, and the process ends.
Thereafter, the warning error code is transmitted to the host computer, and the host computer warns the user that the remaining amount of the spare packet area of the optical disk 2 is small based on the warning error code, and displays a message urging the user to back up the information.

In this way, the user is warned that the spare packet area of the optical disk 2 is running low, so that the user can perform operations such as information backup before the spare packet area of the optical disk 2 is completely used. It is possible to prevent a situation where replacement recording of information that is difficult to reproduce due to a small area cannot be performed.

[0091]

As described above, according to the information recording / reproducing apparatus of the present invention, information which may become unreproducible in the future due to aging or deterioration on a writable optical disc wastes recording space. Without that, you can still play correctly.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a CD-RW drive device as one embodiment of an information recording / reproducing device of the present invention.

FIG. 2 is a diagram showing a format of a recording area of a normal writable optical disk.

FIG. 3 is a diagram showing a format of a recording area of a writable optical disk 2 used in the CD-RW drive device 1 shown in FIG.

FIG. 4 is a diagram showing a format of an optical disc by a track-at-once recording method.

FIG. 5 is a diagram showing a format of an optical disk according to a packet write recording method.

FIG. 6 is a diagram showing a format of a replacement packet area of the optical disc 2;

FIG. 7 is a diagram showing a data format of a replacement packet address management unit of the optical disc 2;

8 is a flowchart showing a packet reproducing process for the optical disc 2 in the CD-RW drive device 1 shown in FIG.

9 shows a CD-R disc in the CD-RW drive device 1 shown in FIG.
FIG. 9 is a flowchart showing a process of overwriting the same packet and alternately recording the same packet on a CD-RW disc.

FIG. 10 is a flowchart showing a remaining amount management process of a replacement packet area of the optical disc 2 in the CD-RW drive device 1 shown in FIG.

[Description of Signs] 1: CD-RW drive device 2: Optical disk 10: CPU 11: Flash ROM 12: Host interface (I / F) controller 13: Buffer manager 14: DRAM 15: Subcode operation controller 16: CD -ROM encoder 17: SRAM 18: CD-ROM decoder 19: Audio controller 20: System controller 21: CD encoder 22: CD decoder 23: Servo 24: Spindle motor controller 30: Power calibration area (PCA) 31: Program memory area (PMA) 32: Lead-in area 33: Track 34: Lead-out area 35: Program area 36: Session 40: Alternate packet area 41: Alternate packet Dress management unit 42: spare packet data areas 50 and 60: the pre-gap 51 and 61: the user data unit 52,73: run-out blocks 53,70: link block 54, 71: run-in block 62: Packet

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Claims (6)

[Claims] 1. An information recording / reproducing apparatus for recording and reproducing information on and from a track composed of a plurality of packets on a writable optical disk, wherein a replacement packet area is provided at an outermost peripheral portion on the optical disk; Information recording characterized in that, when a reproduction error occurs during the reproduction of information recorded in an arbitrary packet, replacement packet processing means for recording replacement information reproducible by a reproduction retry process in the replacement packet area is provided. Playback device. 2. The information recording / reproducing apparatus according to claim 1, wherein said replacement packet processing means is provided with means for recording replacement source information and replacement destination address information of information replacement-recorded in said replacement packet area. An information recording / reproducing apparatus characterized by the above-mentioned. 3. The information recording / reproducing apparatus according to claim 1, wherein said replacement packet processing means is capable of reproducing by a predetermined number of reproduction retry processes when said reproduction error is a disk error dependent on the state of said optical disk. An information recording / reproducing apparatus provided with means for alternately recording important information in the alternate packet area. 4. An information recording / reproducing apparatus for recording and reproducing information on and from a track composed of a plurality of packets on a writable optical disk, wherein a replacement packet area is provided at an outermost peripheral portion on the optical disk, When a reproduction error occurs during the reproduction of information recorded in an arbitrary packet, when the optical disk is a write-once optical disk, information that can be reproduced by a reproduction retry process is alternately recorded in the alternate packet area, and the optical disk is rewritten. An information recording / reproducing apparatus, comprising: a replacement packet processing means for overwriting information of a packet having a reproduction error on the same packet when the optical disk is possible. 5. The information recording / reproducing apparatus according to claim 4, wherein the replacement packet processing means reproduces the information of the overwritten packet under a preset reproduction condition and, when a reproduction error occurs, outputs the information. An information recording / reproducing apparatus, comprising means for recording data in the replacement packet area. 6. The information recording / reproducing apparatus according to claim 1, further comprising: means for generating a warning when a usage rate of the replacement packet area exceeds a predetermined value. Characteristic information recording / reproducing device.