JPH06302122A - Optical information recording and reproducing device - Google Patents

Abstract

PURPOSE:To always read either of three kinds by providing a rewriting means when at least one kind is not read normally from among three kinds of specified information written four by four each at the time of initialization. CONSTITUTION:At least one kind is read from among three kinds of information of a disk definition structures, first defect lists and second defect lists written four by four each at an initialization time by inserting an optical disk. The corresponding information is again written on the place of the disk from which the information is not normally read among the four. Consequently, wether or not the four are always normal is checked and abnormal reading is prevented. The information is written on an alternative sector when it is not written by rewriting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical information recording / reproducing apparatus for recording / reproducing information on / from an optical disk (including a magneto-optical disk) which is an information recording medium, using a semiconductor laser.

[0002]

2. Description of the Related Art Recently, in the information age, it is important to store the contents recorded on an information recording medium for a long time, and the recording life of an optical disk is currently 5 years or 10 years. The recording film of this optical disc deteriorates due to optical abrasion and a defect occurs by reading information with time or repeatedly at the same location. However, it is a great problem in information storage that the already written information becomes unreadable due to such deterioration.

Therefore, in the optical information recording / reproducing apparatus, at the time of the initial operation by inserting the optical disc, specific recording information on the optical disc is read out, and the recording condition and the like are set based on the information. As information to be read at the time of the initial operation, a sector format part (Sector Format Part: hereinafter abbreviated as “SFP”) in which the type of the optical disc, recording conditions, etc. are described, and defect management information of the optical disc are written. Defect Management Area: "DM
Abbreviated as "A").

FIG. 5 shows the position of each zone defined in the 90 mm ISO standard medium (optical disk). As can be seen, the optical disk has four DMs.
A exists. This is because the defect management information written therein is important information for the optical disc.
An SFP exists in the inner circumference control zone of the optical disc.

The defect management information written in each DMA is, as shown in FIG. 6, a disk definition structure (Disk Definition Structure).
ture: hereinafter, abbreviated as “DDS”), a first defect list (Primary Defect List: hereinafter abbreviated as “PDL”) showing information on initial defects, and a first defect list showing information on defects generated during use. 2 Defect list (Secondary Defect
There are three types of information: List: hereinafter abbreviated as "SDL". The contents of the respective information are shown in Tables 1 to 3, respectively.

[0006]

[Table 1]

[0007]

[Table 2]

[0008]

[Table 3]

Of these, PDL and SDL may be written in any sector other than the DDS of each DMA, but an example of each position is shown in FIG. Also, D
There are a total of four DSs, PDLs and SDLs, two on the inside and two on the outside. This is because the DDS cannot be read due to deterioration or the like.

The DMA track is a portion which is always read when the control track is read by inserting the disk, and it is considered that the DMA track is deteriorated by optical abrasion. However, if even one of the four tracks can be read, the disk after the disk is inserted. The read operation can be ended.

For example, in the initial operation by inserting the optical disc, as shown in FIG. 7, first, the DDS of 0 track and 0 sector in the inner peripheral portion of the optical disc is read, and based on this, the PDL corresponding to this DDS is read. ，
SDL is read sequentially, and when the information can be read normally, this read operation is terminated with initial OK, but when it cannot be read normally, DDS of 1 track 14 sectors is read and then this DDS is supported. The PDL and SDL are sequentially read.

Next, when the information can be read normally, the read operation is terminated, and when the information cannot be read normally, the DDS of the 9997 track 0 sector on the outer peripheral portion of the optical disk is read, This D
The PDL and SDL corresponding to the DS are sequentially read. When the information can be read normally, the read operation is ended. When the information cannot be read normally, the DDS of 9998 tracks and 14 sectors is read, and then the DD is read.
PDL and SDL corresponding to S are sequentially read.

When the information can be read normally, the read operation is completed, and when the information cannot be read normally, four DDs are written on the optical disk.
Since S, PDL, and SDL cannot be read normally, it is determined that the initial cannot be performed, and error processing is performed.

[0014]

As described above, four DDSs and PDs are written on the optical disk.
If at least one of L and SDL can be read, the read operation after the disc is inserted can be normally terminated, but if the last one that can be normally read cannot be normally read due to some influence, 4 All of them will be unreadable and you will not be able to use the optical disc.

The present invention has been made in view of the above-mentioned points, and a disk definition structure,
An object of the present invention is to always be able to read at least one of the first defect list and the second defect list normally.

[0016]

In order to achieve the above object, the present invention provides an optical information recording / reproducing apparatus for recording / reproducing information on / from an optical disc which is an information recording medium, by inserting an optical disc. At the time of initial operation, four disc definition structures are written on the optical disc,
At least one type of information among the three types of information of the first defect list or the second defect list is read, and if there is one that is not read normally among the four types of information, the normal reading is performed. It is provided with a means for rewriting information corresponding to a portion on the optical disk which could not be formed.

It should be noted that it is preferable to provide a means for writing the information to the alternative sector on the optical disk when the information is read after the above-mentioned rewriting and the reading cannot be performed normally again.

In addition, at the time of the initial operation by inserting the optical disk, among the three types of information of the disk definition structure, the first defect list, and the second defect list, each of which is written four on the optical disk. There is also provided an optical information recording / reproducing apparatus provided with means for reading at least one kind of information and outputting a warning signal when only a predetermined number of four or less can be normally read.

[0019]

According to the optical information recording / reproducing apparatus of the present invention,
At the time of initial operation by inserting the optical disc, four disc definition structures, the first defect list, or the second defect list, which are respectively written therein,
At least one of the three types of information in the defect list was read, and if there was one that was not successfully read out of the four, go to the part on the optical disc that could not be read normally. Since the corresponding information is written again, it is possible to always check whether or not at least one of the four pieces of information is normal, and it is possible to prevent normal reading.

If the information is read after the above-mentioned rewriting and if the information cannot be read normally again, if the corresponding information is written in the alternative sector on the optical disk, the above-mentioned information among It is possible to more reliably prevent any of the above from being unreadable normally.

Further, among the three types of information of the disc definition structure, the first defect list, and the second defect list, each of which is written four on the optical disc at the time of the initial operation by inserting the optical disc. By reading at least one type of information and outputting a warning signal when only a predetermined number of four or less can be normally read, it is possible to prevent the information from becoming unreadable in advance.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 2 is a block diagram showing the configuration of an optical information recording / reproducing apparatus which is an embodiment of the present invention.

This optical information recording / reproducing apparatus is an optical disc 1 which is an information recording medium for recording various information (data).
, A rotation control system 3 for controlling the number of rotations of the motor 2, an optical pickup 4 for irradiating the recording surface of the optical disk 1 with a semiconductor laser, and an optical pickup 4
An actuator control system 5 for moving the optical disc 1 in the radial direction of the optical disc 1 and a signal detector 6 for detecting a signal from the optical pickup 4 are provided.

A CPU is built in to control the entire apparatus, and is used when the drive controller 7 performs a process for obtaining the optimum recording output value of the optical disk 1 and the like, and the drive controller 7 performs various processes. It also has a memory 8 such as a ROM and a RAM, which is a storage area, and a laser drive circuit 9 for controlling the irradiation of the semiconductor laser (laser light) of the optical pickup 4 by the optimum recording output value sent from the drive controller 7.

Therefore, when recording information on the optical disc 1, when the rotation control system 3 rotationally drives the motor 2 to rotate the optical disc 1 according to an instruction from the drive controller 7, the instruction is first sent to the actuator control system 5. The optical pickup 4 is moved to irradiate the control track of the optical disc 1 with laser light, and a signal corresponding to the reflected light is detected by the signal detector 6 and sent to the drive controller 7.

Then, the drive controller 7 sends the optimum recording output value corresponding to the signal to the actuator control system 5 to move the optical pickup 4, while the laser driving circuit 9 operates according to the optimum recording output value set by the drive controller 7. The recording surface of the optical disc 1 is irradiated with laser light to record various information. Further, when reproducing the information recorded on the optical disc 1, the drive controller 7
The laser drive circuit 9 irradiates the laser light from the optical pickup 4 with the reproduction output value from the signal, and the signal detection unit 6 detects a signal corresponding to the reflected light and sends it to the drive controller 7 to reproduce various information.

FIG. 3 is a flow chart showing a read operation (initial operation) by inserting the optical disc 1 by the optical information recording / reproducing apparatus. First, the optical disc 1
The contents of the SFP (sector format part) in the inner peripheral part of are read and the drive conditions of the drive are set. Here, a detailed example of the contents of the SFP will be shown below.

(1) Medium characteristic data Byte 0: Format descriptor 1000000, which represents a composite continuous servo tracking system, constant angular velocity and RLL (2,7) mark position recording. Byte 1: format descriptor 2 00010001, which represents a 5 interleaved Reed-Solomon code with a minimum distance of 17 applied to a 512-byte sector.

Byte 2: The number of sectors per track is 00011001, which represents 25 sectors per track. Byte 3: reflectance The reflectance (R) of the disk measured at a nominal wavelength of 825 nm.
And record the following numbers. n = 100R

Byte 4: Land record or group record 0000000000, which represents a land record. Byte 5: Reserved FFh. Byte 6: Maximum reproduction power The minimum value specified in bytes 21 and 135 to 249 of the control information track is recorded. The next n is recorded with the maximum reproduction power Pw (unit mW) for reproducing the control information track. n = 20Pw

Byte 7: Disc type 0000 0000: Fully embossed disc 0010 0000: Fully rewritable disc 1010 0000: Rewritable disc with partial embossed data Other settings are reserved for future use and are prohibited.

Bytes 8 and 9: The last track of the data zone are 00100111 and 00001111, and represent the MSB (most significant bit) and LSB (least significant bit) of the last track number (9999) of the data zone. Byte 10: The polarity of the figure of merit is 00000001, which represents the negative polarity.

Byte 11: Size of performance index The size of the performance index (F) is recorded, and the next value of n is recorded. n = 10000F Bytes 12, 13: Reserved FFh. Bytes 14 to 17: Unspecified (herein referred to as "vendor mark area") These bytes may be used by the media manufacturer.

(2) Control data Byte 18: Wavelength The wavelength L ₁ (unit: nm) of the driving device is specified, and the next n is recorded. n = 1 / 5L ₁ This byte sets n = 165. Byte 19: defining a reflectance R ₁ in the reflectance wavelength L _1, and records the next n. n = 100R ₁ This value shall be the same value as byte 3.

Byte 20: Rotational frequency The rotational frequency N ₁ (unit: Hz) of the disk is defined, and the next n is recorded. n = N ₁ This byte sets n = 30. Byte 21: maximum reproduction power conditions maximum playback power of information zone in L ₁ and N ₁ P ₁
Define (unit mW) and record the next n. n = 20P ₁ where 24 ≦ n ≦ 26

Bytes 22 to 30: Recording power with constant pulse width Bytes 22 to 30 are pulse widths Tw under the conditions L ₁ and N _1.
The recording power Pw (unit: mW) for
To record. n = 5Pw

Byte 22: Tw = 1.00T and radius r
= 24 mm recording power byte 23: Tw = 1.00 T and radius r = 30 mm recording power byte 24: Tw = 1.00 T and radius r = 40 mm recording power byte 25: Tw = 0.50 T and radius Recording power at r = 24 mm Byte 26: Recording power at Tw = 0.50 T and radius r = 30 mm

Byte 27: Tw = 0.50T and radius r
= 40 mm recording power Byte 28: Tw = 0.25 T and radius r = 24 mm Recording power Byte 29: Tw = 0.25 T and radius r = 30 mm Recording power Byte 30: Tw = 0.25 T and radius Recording power at r = 40 mm Here, T is a cycle of one channel bit.

Bytes 31 to 34: Recording Pulse Width at Constant Recording Power The recording pulse width Tw (unit: ns) for the recording power Pw under the conditions L ₁ and N ₁ is defined, and the next n is recorded. n = Tw byte 31: recording power

Byte 32: Recording pulse width at radius r = 24 mm Byte 33: Recording pulse width at radius r = 30 mm Byte 34: Recording pulse width at radius r = 40 mm Bytes 35 to 43: Preliminary FFh.

Bytes 44-47: DC Erase Power Byte 44 is 00h. Bytes 45 to 47 define DC erasing power Pe (unit: mW) of three radii under the conditions L ₁ and N ₁ , and are recorded similarly to Pw of bytes 22 to 30. Bit 45: Erase power at radius r = 24 mm

Byte 46: Erase Power at Radius r = 30 mm Byte 47: Erase Power at Radius r = 40 mm Byte 48: Rotational Frequency Disc rotation frequency N ₂ (unit: Hz) is defined, and it is N _{1 of} byte 20. Record in the same way. If this byte is not FFh, set n = 40.

Bytes 49-75 Record the same parameters as bytes 21-47 under conditions L ₁ and N ₂ . However, the bytes 56 to 58 are FFh. Byte 76: Rotation frequency Specify the rotation frequency N ₃ (unit: Hz) of the disk and record it in the same manner as N _{1 of} byte 20. If this byte is not FFh, set n = 60.

Bytes 77-103 Record the same parameters as bytes 21-47 under conditions L ₁ and N ₃ . However, the bytes 84 to 86 are FFh. Byte 104: Rotation frequency Specify the rotation frequency N ₄ (unit: Hz) of the disk and record it in the same manner as N _{1 of} byte 20. If this byte is not FFh, n is set to a value other than 30, 40 and 60.

Bytes 105-131 Record the same parameters as bytes 21-47 under conditions L ₁ and N ₄ . However, the bytes 112 to 114 are FFh. Byte 132: Wavelength The wavelength L ₂ (unit: nm) of the driving device is specified, and the next n is recorded. n = 1 / 5L ₂ This byte sets n = 156.

[0046] Byte 133: defining the reflectance R ₂ in the reflectance wavelength L _2, and records the next n. n = 100R ₂ byte 134: rotation frequency The rotation frequency N ₁ (unit: Hz) of the disk is specified, and the next n is recorded. n = N ₁ This byte sets n = 30.

Byte 135: Maximum playback power Maximum playback power P ₂ of the information zone under the conditions L ₂ and N _1.
Define (unit mW) and record the next n. n = 20P ₂ where 24 ≦ n ≦ 26

Bytes 136 to 144: Recording power with constant pulse width Recording power P with respect to pulse width Tw under conditions L ₂ and N ₁
Define w (in mW) and record the next n. n = 5Pw

Byte 136: Recording power at Tw = 1.00T and radius r = 24 mm Byte 137: Tw = 1.00T and radius r = 30 mm
Recording power at Byte 138: Tw = 1.00T and radius r = 40mm
Recording power at Byte 139: Tw = 0.50T and radius r = 24mm
Recording power at 140 bytes: Tw = 0.50T and radius r = 30mm
Recording power at

Byte 141: Recording power at Tw = 0.50T and radius r = 40mm Byte 142: Tw = 0.25T and radius r = 24mm
Recording power at Byte 143: Tw = 0.25T and radius r = 30mm
Recording power at 144 bytes: Tw = 0.25T and radius r = 40mm
Recording Power at Here, T is a cycle of one channel bit.

Bytes 145 to 148: Recording pulse width under constant recording power The recording pulse width Tw (unit: ns) for the recording power Pw under the conditions L ₂ and N ₁ is defined, and the next n is recorded. n = Tw byte 145: recording power byte 146: recording pulse width at radius r = 24 mm

Byte 147: Recording pulse width at radius r = 30 mm Byte 148: Recording pulse width at radius r = 40 mm Bytes 149 to 157: Spare FFh. Bytes 158 to 161: DC erase power Byte 158 is 00h. Bits 159-161
Is the DC cancellation power P of three radii under conditions L ₂ and N _1.
e (unit mW) is specified, and Pw of bytes 136 to 144
Record as in.

Byte 159: Erase power at radius r = 24 mm Byte 160: Erase power at radius r = 30 mm Byte 161: Erase power at radius r = 40 mm Byte 162: Rotation frequency Rotation frequency N ₂ (unit Hz) ) Is specified and is recorded in the same manner as N _{1 of} byte 134. This byte is FFh
Otherwise, set n = 40.

Bytes 163-189 Record the same parameters as bytes 135-161 under conditions L ₂ and N ₂ . However, bytes 170 to 172 are FF
Let h. Byte 190: Rotation frequency Specify the rotation frequency N ₃ (unit: Hz) of the disk and record it in the same manner as N _{1 of} byte 134. This byte is FFh
Otherwise, set n = 60.

Bytes 191-217 Record the same parameters as bytes 135-161 under conditions L ₂ and N ₃ . However, bytes 198-200 are FF
Let h. Byte 218: Rotation frequency Specify the rotation frequency N ₄ (unit: Hz) of the disk and record it in the same manner as N _{1 of} byte 134. This byte is FFh
If not, n sets other values of 30, 40 and 60.

Bytes 219-245 Record the same parameters as bytes 135-161 in conditions L ₂ and N ₄ . However, bytes 226 to 228 are FF
Let h. Byte 246: Wavelength Specifies the wavelength L ₃ (unit: nm) of the driving device,
Record as for L _{2 of 2} .

Bytes 247-359 Record the same parameters as bytes 133-245 under condition L ₃ . However, bytes 284-286, 312-3
14 and 340 to 342 are FFh, and bytes 256 to
258 is optional. Bytes 360 to 379: Reserved FFh.

Table 4 shows the control data (bytes 18-359).
Is a summary of the regulations for). In this figure, large numbers are required bytes and numbers with diagonal lines are FF.
It is a byte that may be set to h. Also, the small number is an arbitrary byte, which is a value specified in (1) or FFh.

(3) System Data Bytes 380, 381: First Track of Emboss Zone If the disc has an emboss zone, these bytes are the MSB, LSB of the first track number of this zone.
To record. If there is no emboss zone, FFh.

Bytes 382, 383: Last Track of Emboss Zone If the disc has an emboss zone, these bytes are the MSB, LSB of the last track number of this zone.
Stipulate. If there is no emboss zone, FFh. Bytes 384 to 399: Reserved FFh.

Bytes 400-428: Control Bytes for Partially Embossed Disc This information is required for Partially Embossed Discs and D
The value is bytes 0 to 28 of DS. These control bytes are defined by the manufacturer when the disc is made. PDL
And busts 421-423 representing SDL addresses
Is FFh. The control byte is F in the case of a completely rewritable disc and a completely embossed disc that can be used by the user in the formatting process and the process of restoring the contents of the DDS.
Fh.

(4) Unspecified data bytes 480-511 The contents of these bytes are unspecified and may include the manufacturer's name.

Returning to FIG. 3, after setting the drive condition of the drive, the vendor mark area (byte 14 to
17) Information is read and the write power of the drive is set, then seek is performed to the DMA on the inner or outer circumference of the optical disc, and the DDS, PDL,
After each information of the SDL is read, after it is finished, seek to the home position and the read operation by inserting the optical display 1 is finished.

FIG. 1 is a flow chart showing a subroutine of the read operation of the DDS, PDL and SDL of FIG. First, four disc definition structures (D
DS), the first defect list (PDL), and the second defect list (SDL) are read. That is, the DDS written in 0 track 0 sector, 1 track 14 sector, 9997 track 0 sector, 9998 track 14 sector of the optical disc 1, respectively,
The PDL and SDL information corresponding to these respectively are read.

After that, it is checked whether all four of them have been read normally (read OK), and if all four are OK, the initial OK is judged and the process returns to the main routine of FIG. If there is a piece that could not be read normally, the corresponding information is rewritten to the portion on the optical disk 1 that could not be read normally, and then it is immediately read (rewrite / read).

Then, it is checked again whether the reading can be normally performed, that is, whether all four pieces of information have been normally read. If the reading cannot be normally performed, the replacement on the optical disc 1 is performed. After writing the corresponding information to the sector, read the information and check if it is written properly, repeat until writing is properly performed (write / read check for alternate sector), and when it is finished The initial OK is judged and the process returns to the main routine.

The locations of the alternative sectors are 0 to 3
Since there are empty tracks in the tracks, 9997 to 9999 tracks, they can be used. Also,
Writing to the same location on the optical disc 1 or an alternative sector may be performed by using the contents of another normally read DDS or the like.

FIG. 4 is a flow chart showing another subroutine of the read operation of the DDS, PDL and SDL of FIG. First, similar to the process of FIG. 1, four DDSs, PDLs, and SDs are written on the optical disc 1, respectively.
After reading each piece of information of L, it is checked whether three or more of the four pieces can be read normally.

When three or more can be read normally, the initial OK is judged and the process returns to the main routine.
If three or more are not normally read, a warning signal is output and the process returns to the main routine. At this time, the warning signal can inform the user of that fact by using, for example, an external display.

Therefore, with respect to the optical disk for which a warning has been issued as described above, by performing processing such as copying the information corresponding to the new optical disk, the DD
It becomes possible to prevent in advance the problem that S, PDL, and SDL cannot be read at all.

[0071]

[Table 4]

[0072]

As described above, according to the optical information recording / reproducing apparatus of the present invention, at the time of the initial operation by inserting the optical disk, four disk definition structures are written in each of them. (DDS), first defect list (PDL), or second
At least one type of information in the defect list (SDL) is read, and if there is one that was not read normally among the four, the part on the optical disc that could not be read normally. Since the information corresponding to is written again, there is a high possibility that at least any one of the information of DDS, PDL, and SDL can always be normally read.

If the information is read after the above-mentioned rewriting and cannot be read normally again, if the corresponding information is written in the alternative sector on the optical disk, DDS, PDL, SDL At least one of the information can always be read normally.

Further, at the time of the initial operation by inserting the optical disc, at least one kind of information of each of DDS, PDL, and SDL written on the optical disc by four is read and a predetermined number out of four is read. If a warning signal is output when only the following can be read normally, DDS, PDL, SDL can be read in advance.
It is possible to prevent that each information of becomes unreadable.

[Brief description of drawings]

FIG. 1 is a flowchart showing an example of a read operation subroutine of DDS, PDL, and SDL in FIG.

FIG. 2 is a block diagram showing a configuration of an optical information recording / reproducing apparatus which is an embodiment of the present invention.

3 is a flowchart showing a read operation by inserting an optical disc in the optical information recording / reproducing apparatus of FIG.

FIG. 4 is a flowchart showing another example of a read operation subroutine of DDS, PDL, and SDL in FIG.

FIG. 5 is an explanatory diagram showing the position of each zone defined in a 90 mm ISO standard medium (optical disc).

FIG. 6 shows DDS, PDL, on the recording surface of an optical disc.
It is a figure of a format which shows an example of each position of SDL.

FIG. 7 is a flowchart showing a read operation of DDS, PDL, and SDL by inserting an optical disc in a conventional optical information recording / reproducing apparatus.

[Explanation of symbols]

 1 Optical Disc 2 Motor 3 Rotation Control System 4 Optical Pickup 5 Actuator Control System 6 Signal Detector 7 Drive Controller 8 Memory 9 Laser Drive Circuit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location G11B 20/12 9295-5D

Claims (3)

[Claims] 1. An optical information recording / reproducing apparatus for recording / reproducing information on / from an optical disc, which is an information recording medium, by using a semiconductor laser, wherein four are written on each of the optical discs during an initial operation by inserting the optical disc. The disc definition structure, the first defect list, or the second defect list contains at least one of the three types of information, and some of the four types did not read normally. In this case, the optical information recording / reproducing apparatus is provided with means for rewriting information corresponding to a portion on the optical disk that could not be read normally. 2. The optical information recording / reproducing apparatus according to claim 1, wherein the information is read after the rewriting, and if the information cannot be read normally again,
An optical information recording / reproducing apparatus comprising means for writing information corresponding to an alternative sector on the optical disc. 3. An optical information recording / reproducing apparatus for recording / reproducing information on / from an optical disc, which is an information recording medium, by using a semiconductor laser, wherein four are written on each of the optical discs during an initial operation by inserting the optical disc. If at least one type of information among the three types of information of the disc definition structure, the first defect list, or the second defect list that has been read is read correctly and less than the predetermined number of four is successfully read. An optical information recording / reproducing apparatus, characterized in that means for outputting a warning signal is provided in the.