JP2003263737A - Optical disk drive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk drive, of which the processing time required for the recording or reproducing operation is reducible as to a data area whereon the alternating process due to the defect is not included. <P>SOLUTION: The flag showing whether the alternative process is carried out or not with respect to a data area DAn, is recorded for every data area DAn to make out (S10) an alternating flag table on an unused area of a read-in area of the optical disk and this alternating flag table is referred to (S2) at the information recording or reproducing operation, and by deciding (S3) whether a defect control table is to be retrieved or not, the retrieval of the defect control table is not required (S6) for the data area DAn whereon the alternating process due to the defect is not included, then the processing time required for the recording or reproducing operation is reduced. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc apparatus having an alternative function of recording using an alternate area even when recording cannot be performed due to a defect in the optical disc.

[0002]

C is a writable information recording medium.
DR (Compact Disc Recordable) and CD-RW (Compact) which is an erasable and rewritable information recording medium.
There is an optical disc device that records or reproduces information by irradiating a laser beam on an optical disc such as Disc Rewritable).

In such an optical disk device, a defect management system is introduced in order to ensure the reliability of data even when there is a defect that data cannot be correctly recorded / reproduced. As such a defect management system or method, DVD-RAM is known, and for CD-RW discs, Mt. Rainier is known.

Here, M for a CD-RW disc is used.
t. Pay attention to Rainier. This Mt. Rainier is roughly divided into the background format (Background F
ormat) and a defect management system. Ba
The ckground format is a fixed packet format for enabling writing in a block (Block) unit, which is the minimum information unit of CD,
This is performed in the background where the host computer is not accessing the optical disc.

Another function of the defect management system is that a plurality of data areas D, which will be described later, are formed on the optical disk.
A and the exclusive replacement area SA are alternately present, and the exclusive replacement area SA is used to replace the defective area. There is also a defect management table for managing defect information and replacement information, and addresses of defective areas and addresses of replacement areas are registered in one-to-one correspondence in this defect management table. That is, the address of the replaced data source,
The defect management information such as the address of the replacement data is the MTA (Main) in the lead-in area (Lead-In Area).
S in the last position of Table Area) and Program Area
It is recorded as a defect management table in TA (Secondary Table Area).

[0006]

In reproducing the data in the recording area in such a defect management system, the defect management table is searched to see if there is a defect within the range requested by the host computer. If there is data that has been exchanged, it is necessary to reproduce the data in the exchange-dedicated area SA together with the data in the data area DA and transfer these correctly.

However, if the defect management table is searched every time the recording / reproducing operation is performed as described above, it takes a long processing time to record / reproduce the data area DA which does not include the replacement.

It is an object of the present invention to provide an optical disk device capable of shortening the processing time required for recording or reproducing a data area which does not include replacement processing due to a defect.

[0009]

The invention according to claim 1 is
In an optical disc device that records or reproduces information on an optical disc having a format in which a plurality of data areas DA and replacement-only areas SA are alternately present, a data area DA
If there is a defect in n, the alternation processing means for recording using the alternation dedicated area SAn is associated with the address of the defective area and the address of the alternation area for reproducing the information recorded in the alternation exclusive area SAn. Defect management table for managing defect information and replacement information, and a flag indicating whether or not replacement processing has been performed on the data area DAn in each unused area of the lead-in area of the optical disc. And a replacement flag table creating means for creating a replacement flag table, and a replacement flag table reference means for deciding whether to search the defect management table by referring to the replacement flag table when recording or reproducing information. , Is provided.

Therefore, for each data area DAn, a flag indicating whether or not a replacement process has been performed on the data area DAn is recorded and a replacement flag table is created in an unused area of the lead-in area of the optical disc. Accordingly, when recording or reproducing information, it is necessary to search the defect management table for the data area DAn that does not include the replacement process due to the defect by determining whether to search the defect management table with reference to the replacement flag table. Therefore, the processing time required for the recording or reproduction is shortened.

According to a second aspect of the present invention, in the optical disk device according to the first aspect, the replacement flag table creating means includes a plurality of identical replacement flag tables in a predetermined area of the lead-in area of the optical disk. Create continuously across sectors.

Therefore, there is a possibility that a sector in which a flag indicating whether or not a certain data area DAn has been replaced is recorded cannot be reproduced later due to the influence of dust, scratches, deterioration or the like. Cannot determine whether or not the data area DAn has been replaced. However, by creating a plurality of identical replacement flag tables continuously over a plurality of sectors, a certain data area DAn can be created. It is possible to reliably determine whether or not they have been replaced.

According to a third aspect of the present invention, in the optical disc apparatus according to the first or second aspect, the replacement flag table creating means sets the same replacement flag table as the lead-in area in a predetermined lead-out area of the optical disk. Create also for the area.

Therefore, by creating the replacement flag table not only in the lead-in area but also in the lead-out area,
The probability of being able to reproduce the flag indicating whether or not a certain data area DAn has been replaced is further improved.

The invention according to claim 4 is the invention according to claims 1 to 3.
In the optical disc device according to any one of the above items, the replacement flag table creating means records the flag indicating whether or not the replacement processing has been performed, and the replacement start address when the replacement processing is performed. Create a flag table.

Therefore, when a certain data area DAn is an area including replacement processing, recording or reproduction of the data area DAn is performed by searching / confirming the defect management table, but the replacement processing of the data area DAn is performed. In the case where it is performed only in the latter half of the specified number of packets that make up the data area, it is useless to check the defect management table at the time of recording or reproducing for the packet area before that, but Since the replacement head address is also recorded in the flag table, it is not necessary to search up to the replacement head address, and the processing time required for recording or reproducing the data area DAn that has not been replaced can be further shortened. Is possible.

The invention according to claim 5 is the invention according to claims 1 to 4.
In the optical disc device described in any one of the above 1, the optical disc apparatus further comprises format determining means for determining whether or not the number of the data area DA and the replacement exclusive area SA is a predetermined number or more as a format of the optical disk, and the replacement flag table is referred to. The means refers to the replacement flag table when the format determining means determines that the number is equal to or more than a predetermined number.

Therefore, the data area DA and the replacement exclusive area S
In the current format having alternating A and A, a predetermined number is specified as the number of data areas DA and replacement exclusive areas SA, but in the future trend, it is conceivable that the number of formats will be less than the predetermined number. For example, although it is possible that all of them can be stored in the defect management table and it is difficult to judge the flag even if the replacement flag table is created, the data area DA and the replacement dedicated area SA
In the case of a format in which the number of the replacement flags is small, since the replacement flag table is not referred to, it is possible to omit the unnecessary replacement flag search.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first embodiment of the present invention.
Or, it demonstrates based on FIG. The optical disk device according to the present embodiment uses a Mt. Rainier
For the optical disc 1 which is a CD-RW disc conforming to the format, the Mt. An example of application to an information recording / reproducing apparatus having a defect management system by Rainier will be shown. FIG. 1 is a schematic block diagram showing the configuration of this information recording / reproducing apparatus (drive apparatus).

The optical disk 1 is rotationally driven by a rotational driving means including a spindle motor 2. The spindle motor 2 is CL by the motor driver 3 and the servo means 4.
The drive is controlled according to the V method or the like. The optical pickup 5 incorporates a semiconductor laser (not shown) as a light source, an optical system, a focusing actuator, a tracking actuator, a light receiving element, a position sensor, and the like, and irradiates the recording surface of the optical disc 1 with laser light.

The optical pickup 5 is movable in the sledge direction (disk radial direction) by a seek motor (not shown). These focusing actuator, tracking actuator, and seek motor are controlled by the motor driver 3 and the servo means 4 so as to position the laser spot on the optical disk 1 based on the signals obtained from the light receiving element and the position sensor.

At the time of data reproduction, the reproduction signal obtained by the optical pickup 5 is amplified by the read amplifier 6 and binarized, and then inputted to the CD decoder 7 to be subjected to deinterleaving and error correction processing. Further, the data after the deinterleaving and error correction processing is performed by the CD-ROM decoder 8
Error correction processing to improve the reliability of the data.

After that, the data processed by the CD-ROM decoder 8 is temporarily stored in the buffer RAM 10 by the buffer manager 9, and when it is prepared as sector data, a host interface (I / I / I) such as ATAPI or SCSI is used.
F) Transfer all at once to the host side by 11. In the case of music data, the data output from the CD decoder 7 is input to the D / A converter 12 to extract an analog audio signal.

On the other hand, at the time of data recording, ATAPI and S
When the data transferred from the host by the I / F 11 such as CSI is received, the data is transferred to the buffer manager 9
Is temporarily stored in the buffer RAM 10. Recording is started when a certain amount of data is accumulated in the buffer RAM 10, but the laser spot is positioned at the writing start point before that. The writing start point is obtained by the wobble signal previously recorded on the optical disk 1 due to the meandering of the track. ATIP for the wobble signal
The ATIP decoder 13 extracts the ATIP information.

Further, the sync signal generated by the ATIP decoder 13 is input to the CD encoder 14 to enable writing of data at an accurate position. Buffer RAM
The data of 10 is recorded on the optical disc 1 through the laser control circuit 16 and the optical pickup 5 after adding an error correction code and interleaving by the CD-ROM encoder 15 and the CD encoder 14.

Such an information recording / reproducing apparatus is provided with a microcomputer 20 including a CPU 17, a ROM 18 and a RAM 19 for controlling the operations of the above-mentioned respective parts and executing the respective functions described later. Reference numeral 21 is a non-volatile memory.

Next, the Mt. for the CD-RW which is the optical disc 1 used in the present embodiment. An example of the Rainier format will be described with reference to FIG. As shown in the figure, the disk format is from the inner circumference to the outer circumference.
Lead-in area (Lead-InArea), program area (Program Area), lead-out area (Lead-OutA)
rea).

Of these, the lead-in area (Lead-In Area)
The area a) is divided into an unused area and an MTA (MainTable Area). MTA is one MIP (Main Infor
mation area) and a maximum of eight defect management tables (MRT (Main Defect Table)). MTA
The size of is variable. MIP and S which will be described later are included in MIP.
It includes DT address information and disk format status (GAA, SA, DA size, disk status, etc., which will be described later). Free entry (Free entr) in which only the replacement address is recorded in the MDT
y) and the defective sector address and its replacement address are recorded as a used entry.
And an unused Unusable entry later.

In the program area (Program Area), first, the pre-gap consists of 150 blocks and is based on the Orange Book. GAA
The (general application area) is an area for recognizing that the drive in which the MRW is not mounted is the MRW disk, and is an area including the driver of the Method 3 and the like. SA (Spare Area) is an area dedicated to replacement of defective sectors. DA (Data Area) is a data area for the user. The size of the data area DA is 1
Although it is 36 packets, only the last data area DA changes according to the capacity of the optical disc 1. As described above, in this format, the data area DA and the replacement exclusive area SA are alternately present, and the Mt. In the case of the Rainier format example, the number of data areas DA and the number of replacement exclusive areas SA are each set to 64.

Further, in the present embodiment, the optical disc 1 is inserted into the optical disc device, and when the disc information is obtained, the replacement flag table is also obtained as will be described later. Table construction is done at format time. However, if a replacement disk without a replacement flag table is inserted, it is constructed at that point. This replacement flag table 31
Is, for example, as shown in FIG.
A flag (replacement Flag) indicating whether or not replacement processing has been performed on the data area DAn is recorded for each (n = 1 to n), where flag = 0 indicates no replacement processing and flag = 1.
Indicates that there is a replacement process. Further, in the replacement flag table 31 of the present embodiment, when the replacement process is performed, the replacement start address is also recorded. As shown in FIG. 4, such a replacement flag table 31 has an ATI
It is created by recording from the head address which is an unused area of the lead-in area obtained by the P information, but in the present embodiment, the sector having the same information (the same replacement flag table 31) corresponds to one packet. It is created by recording (= 32 sectors).

An example of processing control executed by the CPU 17 when there is a recording or reproducing request from the host in such a configuration will be described with reference to the schematic flowchart shown in FIG. First, when a request for recording or reproducing data from the host is obtained (step S1), the recording or reproducing process is performed according to the request, but prior to that,
The replacement flag table 31 of the lead-in area is loaded (S2). Then, it is checked whether or not there is a replacement flag for the data area DAn in the area requested to be recorded or reproduced (S3). The processing of these steps S2 and S3 is executed as a function of the replacement flag table reference means.

In this judgment, the relevant data area DAn
If there is a replacement flag (Y in S3), the replacement management table MDT included in the lead-in area is searched as described in the related art, and the replacement-dedicated area SAn corresponding to the data area DAn is searched. Find out the address of (S4). Then, the replacement exclusive area S of the obtained replacement destination
Reproduction is performed by transferring the data of the corresponding address in An, or the replacement exclusive area S of the obtained replacement destination
Recording is performed at a corresponding address position in An (S5),
Then, the original recording or reproducing process is executed (S
6).

On the other hand, in the replacement flag table reference processing, if there is no replacement flag for the data area DAn (N in S3), the replacement management table is not searched,
The recording or reproducing process is executed as it is (S6). Therefore, when recording or reproducing information, the replacement flag table 31
By deciding whether to search the defect management table by referring to the data area D
As for An, it is not necessary to search the defect management table, so that the processing time required for recording or reproducing the defect is shortened.

On the other hand, in such a recording or reproducing process, it is constantly checked whether or not there is a defect (S7), and if there is no defect (N of S7) and the recording or reproducing process is completed (S8). Y), the processing is ended. If there is a defect in the recording or reproducing process (Y in S7), the replacement process is executed (S9). Since this is a well-known technique, details will be omitted, but data is recorded using the corresponding replacement dedicated area SAn instead of the defective data area DAn, and the address of the defect area and the replacement area of the defect management table are recorded. The defect information and the replacement information are recorded in association with the address. The processing of step S9 is executed as a function of the replacement processing means. Further, when the replacement process is performed, the replacement flag = 1 is set for the corresponding data area DAn in the replacement flag table 31 (S10). By the way, in the replacement flag table 31, the replacement flag = 0 is initially set. The process of step S10 is executed as a function of the replacement flag table creating means. After that, if the recording or reproducing process is completed (Y of S8), the process is completed.

When the replacement flag table 31 is loaded, there is a possibility that the sector in which the table is recorded cannot be reproduced thereafter due to the influence of dust, scratches, deterioration, etc. It becomes impossible to determine whether the area DAn has been replaced.
In this regard, in the present embodiment, as the replacement flag table 31, one packet of a sector having the same information (=) is read from the start address of the lead-in area obtained from the ATIP information.
Since data is recorded as 32 sectors), it is possible to surely determine whether or not a certain data area DAn is replaced by using another sector even if the certain sector cannot be reproduced. .

In this respect, the same replacement flag table 31 as the replacement flag table 31 recorded in the predetermined area of the lead-in area is used for the lead-out area, as shown in FIG. If the packets (= 32 sectors) are repeatedly recorded, the probability of being able to reproduce the flag indicating whether or not a certain data area DAn is replaced is further improved.

The CD which is the object of the present embodiment
-RW Mt. According to the Rainier format, one data area DA is composed of 136 packets except the last. Here, as described above, a certain data area DA
If n is a data area including replacement processing due to a defect,
Recording or reproduction on the data area DAn is performed by checking the defect management table. However, for example, when the replacement process of the data table DAn is performed only for the 130th packet, it is useless to confirm the defect management table at the time of recording or reproducing in the area before the packet. In this respect, in the present embodiment, as shown in FIG. 3, not only the replacement flag indicating whether the replacement process is included in the replacement flag table 31 but also the replacement start address when the replacement process is performed. Since it is recorded, it is not necessary to search the defect management table up to the area of the replacement start address. Therefore, it is possible to further reduce the processing time required for recording or reproducing the data area DAn that has not been replaced.

A second embodiment of the present invention will be described with reference to FIG. The same reference numerals are used for the parts shown in the first embodiment, and the description will be omitted.

In the present embodiment, it is assumed that the number of the data area DA and the replacement exclusive area SA will be changed in the future as the format of the optical disc 1. That is, the current CD-RW Mt. In the Rainier format, 64 is specified as the number of pairs of the data area DA and the replacement exclusive area SA, but as a future trend, it is conceivable to specify a format smaller than the predetermined number. In that case, for example, all of the defects can be stored in the defect management table, and it may be difficult to judge the flag even if the replacement flag table is created. More specifically, if the number of pairs of the data area DA and the replacement exclusive area SA is 8 or less, 1
Since the information is stored in one defect management table MDT,
In this embodiment, the predetermined number is set to eight, the format state of the optical disc 1 is checked, and the data area D
It is determined whether the number of pairs of A and the replacement exclusive area SA is 8 or more (S11). The process of step S11 is executed as a function of the format determination means.

In this determination, only when the number of pairs of the data area DA and the replacement exclusive area SA is 8 or more (S1
1 Y), the replacement flag table 31 is referred to as described above (S2), and the subsequent processing is performed. Therefore, in the case of a format in which the number of the data area DA and the replacement exclusive area SA is as small as eight or less, the defect management table is directly searched without referring to the replacement flag table 31 (S
4) It is possible to omit unnecessary replacement flag search.

[0041]

According to the first aspect of the present invention, a flag indicating whether or not the replacement process has been performed on the data area DAn is recorded for each data area DAn, and the replacement flag table is read from the optical disk. It is created in the unused area of the IN area, and when recording or reproducing the information, the replacement flag table is referred to determine whether or not to search the defect management table. Since it is not necessary to search the defect management table for DAn, the processing time required for recording or reproducing the defect can be shortened.

According to the second aspect of the present invention, in the optical disk device according to the first aspect, a plurality of identical replacement flag tables are continuously created over a plurality of sectors. Even if the recorded sector is later affected by dust, scratches, deterioration, etc., it is possible to reliably determine whether or not a certain data area DAn is replaced.

According to the third aspect of the present invention, in the optical disc apparatus according to the first or second aspect of the invention, therefore, the replacement flag table is created not only in the lead-in area but also in the lead-out area. It is possible to further improve the probability that the flag indicating whether or not DAn has been replaced can be reproduced.

According to the fourth aspect of the invention, in the optical disk device according to any one of the first to third aspects, since the replacement head address is also recorded in the replacement flag table, the replacement head address is searched. Therefore, the processing time required for recording or reproducing the data area DAn that has not been replaced can be further shortened.

According to the fifth aspect of the present invention, in the optical disk device according to any one of the first to fourth aspects, in the case of a format in which the number of the data area DA and the replacement exclusive area SA is small, the replacement flag table is set. Since no reference is made, useless replacement flag search can be omitted.

[Brief description of drawings]

FIG. 1 is a block diagram of an optical disk device showing a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an example of a disk format.

FIG. 3 is an explanatory diagram showing a replacement flag table.

FIG. 4 is an explanatory diagram showing a lead-in area.

FIG. 5 is a schematic flowchart showing an example of processing control.

FIG. 6 is an explanatory diagram showing a lead-out area.

FIG. 7 is a schematic flowchart showing an example of processing control according to a second embodiment of the present invention.

[Explanation of symbols]

1 optical disc 31 Replacement flag table S2, S3 replacement flag reference table reference means S9 Replacement processing means S10 replacement flag table creating means S11 format determination means

Claims (5)

[Claims] 1. A plurality of data areas DA and a replacement exclusive area S
In an optical disc device that records or reproduces information on an optical disc of a format in which A and A alternate, a replacement-only area SA when a data area DAn is defective
The replacement processing means for recording using n, and the defect information and the replacement information are managed by associating the address of the defective area with the address of the replacement area for reproducing the information recorded in the replacement dedicated area SAn. A defect management table and a flag indicating whether or not replacement processing has been performed for each data area DAn in the unused area of the lead-in area of the optical disc are recorded to create a replacement flag table. An optical disc device comprising: replacement flag table creating means; and replacement flag table reference means for deciding whether to search the defect management table by referring to the replacement flag table when recording or reproducing information. . 2. The replacement flag table creating means creates a plurality of identical replacement flag tables in a predetermined area of the lead-in area of the optical disk continuously over a plurality of sectors. Item 1. The optical disk device according to item 1. 3. The replacement flag table creating means creates the replacement flag table, which is the same as the lead-in area, also for a predetermined area of the lead-out area of the optical disc. The optical disk device described. 4. The replacement flag table creating means creates the replacement flag table in which, together with a flag indicating whether or not a replacement process has been performed, the replacement start address of the replacement process is also recorded when the replacement process is performed. The optical disk device according to any one of claims 1 to 3, wherein: 5. A format determination means for determining whether or not the number of said data area DA and replacement exclusive area SA is a predetermined number or more as a format of said optical disk, and said replacement flag table reference means is said format determination. 5. The optical disk device according to claim 1, wherein the replacement flag table is referred to when it is determined by the means that the number is equal to or more than a predetermined number.