JP2008041148A - Disk recording and reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk recording and reproducing device for optimally adjusting recording power of a light beam when data is recorded. <P>SOLUTION: In the optical disk device 1, an OPC processing part 13 performs OPC processing based on an RF signal generated by an RF signal generating part 12 when data recorded in a PCA area on an optical disk 1a is reproduced by a pickup 11. When OPC processing by an OPC processing part 13 is not finished normally, a control part 10 performs recording processing by the prescribed recording power for the prescribed area from defective OPC-processed area. After that, the control part 10 restarts the OPC processing in the next area. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a disk recording / reproducing apparatus for recording data by irradiating a light beam onto a disk-shaped recording medium and reproducing the recorded data.

  An optical disk device that writes information on an optical disk such as a DVD-R, DVD-RW, DVD + RW, DVD-ROM, CD-R, and CD-RW using an optical beam is suitable for recording information on the optical disk. An OPC (Optimum Power Control) process is performed to determine the power. The OPC process is obtained by writing a test pattern to a test area provided in advance on an optical disc while changing the recording power stepwise, and reading and reproducing the written test pattern. This is a process for determining an optimum recording power based on an RF (Radio Frequency) signal. By writing to the optical disc with the optimum recording power determined by such OPC processing, variations in recording sensitivity between different optical discs, differences in characteristics between the optical disc and the optical pickup of the optical disc apparatus, ambient temperature, etc. Thus, the writing process can be performed under the optimum conditions in consideration of the above, and the reliability of the information written on the optical disk can be ensured.

Patent Document 1 and Patent Document 2 describe an optimum recording power based on the β value calculated from the maximum value and the minimum value of the RF signal obtained by reproducing the test pattern written in the test area on the optical disc. An optical disc apparatus configured to perform OPC processing to determine the above is disclosed. Specifically, an optimal β value set in advance is stored in advance in the memory. Then, when the recording power of the pickup is changed stepwise, the β value calculated based on the maximum value and the minimum value of the RF signal obtained according to each, and the optimum β value stored in the memory, Can be used to specify the optimum recording power. The recording power specified in this way is used for the subsequent recording processing.
Japanese Patent Laid-Open No. 2003-091852 JP 2002-288833 A

  FIG. 4 is an explanatory diagram for explaining a conventional OPC process. FIGS. 4A and 4B schematically show test areas set on the optical disc, respectively. Note that concentric tracks are formed on the optical disc, and the OPC process as described above performs a data recording process in a spiral manner from the outer track to the inner track in the test area. . 4 (a) and 4 (b) display the area in which data is recorded in the OPC process in a straight line. Accordingly, in the optical disc apparatus, the OPC process is sequentially performed on a predetermined area in the direction from the outer peripheral side to the inner peripheral side of the optical disc as indicated by the white arrow B in FIG. In FIG. 4A, 401 indicates an area in the Nth OPC process, 402 indicates an area in the (N + 1) th OPC process, and 403 indicates an area in the (N + 2) th OPC process.

  Here, in the OPC process as described above, the optimum recording power cannot be specified based on the optimum β value stored in advance in the memory depending on the β value calculated based on the RF signal for some reason. , May not finish normally. For example, when the OPC process is performed on an area on the optical disc where dust, dirt, scratches, or the like are attached, there is a possibility that the β value based on the RF signal does not take an optimal β value set in advance. In FIG. 4, reference numeral 400 in FIG. 4B indicates dust, dirt, scratches, or the like on the optical disk, indicating that the OPC process performed on the area 402 has not ended normally.

  If the OPC process cannot be completed normally, the OPC process is performed again in the area 403 next to the area 402 where the OPC process has not been completed normally, and the optimum recording power is determined. If the OPC process cannot be completed normally due to dust, dirt or scratches on the optical disk, the OPC process for adjacent areas 403 on the same track is also normally performed due to the influence of dust, dirt or scratches on the optical disk. There is a high possibility that it cannot be terminated. In addition, the OPC process may not be terminated normally due to the influence of dust, dirt, scratches, etc. on the optical disk, not in the adjacent area on the same track, but also in the area near the area 402 in the adjacent track. Is expensive. Accordingly, when dust, dirt, scratches, or the like are attached to the optical disk, it cannot be normally completed over a plurality of consecutive OPC processes, and the OPC process cannot be normally completed over a plurality of tracks. There is a problem that the efficiency of the OPC process may be reduced.

  In addition, the apparatus disclosed in Patent Document 2 has a configuration in which, when the OPC process does not end normally, the optimal recording power is calculated based on the RF signal instead of executing the OPC process again. ing. However, as described above, when the OPC process cannot be completed normally due to dust, dirt, scratches, or the like on the optical disk, it is very difficult to calculate the optimum recording power based on the RF signal at this time. Has the problem of being.

  The present invention has been made in view of such circumstances, and the object of the present invention is to reduce the influence of dust, dirt, scratches, etc. on the optical disk on the adjustment process of the recording power of the light beam, and to stabilize the invention. It is an object of the present invention to provide a disc recording / reproducing apparatus that can perform adjustment processing and write processing with more optimal recording power.

  Another object of the present invention is to provide a disc recording / reproducing apparatus capable of clearly distinguishing an area where adjustment processing cannot be normally performed for some reason from an area used for normal adjustment processing. is there.

  A disc recording / reproducing apparatus according to the present invention comprises a recording means for recording data by irradiating a light beam onto a disc-shaped recording medium on which spiral or concentric tracks are formed, and data recorded by the recording means. Reproduction means for reproducing and outputting a reproduction signal, and adjustment means for performing adjustment processing for optimally adjusting the recording power of the light beam when recording data, based on the reproduction signal output by the reproduction means A disc recording / reproducing apparatus comprising: a determination unit that determines whether or not the adjustment process by the adjustment unit has been normally completed; and an adjustment process that has not been completed normally when the determination result by the determination unit is negative And a position changing means for changing a data recording position to a track spaced a predetermined number of times from the track on which the data is recorded. If the result of determination by the cross-sectional section is negative, wherein said position changing means is arranged to record data on the recording position changes.

  According to the present invention, when a disk recording / reproducing apparatus records data on the basis of a reproduction signal that is reproduced by outputting data recorded on a disk-shaped recording medium on which spiral or concentric tracks are formed. If the adjustment process that optimally adjusts the recording power of the light beam is not completed and the adjustment process cannot be completed normally, the data is recorded on a track that is a predetermined number of distances away from the track that recorded the data for the adjustment process. And the data for the next adjustment processing is recorded at the changed recording position. Therefore, when the recording power adjustment process does not end normally, the adjustment process is performed based on the reproduction signal output by reproducing the data recorded on the tracks separated by a predetermined interval. When the adjustment process cannot be completed normally due to dust, dirt or scratches on the medium, the next adjustment process can be performed while avoiding the dust, dirt or scratches.

  In the disc recording / reproducing apparatus according to the present invention, when the determination result by the determination unit is NO, the recording unit changes the position change unit from a recording position where data was recorded for adjustment processing that did not end normally. Is configured to record data with a light beam having a predetermined recording power in an area up to the recording position changed.

  According to the present invention, when the disk recording / reproducing apparatus cannot normally finish the adjustment process of the recording power of the light beam, the recording position from which the data was recorded for the adjustment process that could not be completed normally is For the adjustment process, data is recorded with a light beam having a predetermined recording power in an area up to a recording position where the data is recorded. Therefore, it is possible to clearly distinguish a region in the vicinity of a region where adjustment processing cannot be performed normally for some reason from a region used for normal adjustment processing.

  In the present invention, when the disk recording / reproducing apparatus cannot normally finish the adjustment process for optimally adjusting the recording power of the light beam, the disk recording / reproducing apparatus starts from the track on which the data was recorded for the adjustment process that could not be completed normally The adjustment process is performed again on tracks separated by a predetermined number. As a result, for example, when the adjustment process cannot be completed normally due to dust, dirt or scratches on the recording medium, the next adjustment process can be performed while avoiding the dust, dirt or scratches. . Therefore, the influence on the adjustment process due to dust, dirt or scratches on the recording medium can be reduced, stable adjustment process can be performed, and the reliability of information written on the recording medium can be secured more stably. Can do.

  In the present invention, the disc recording / reproducing apparatus has a predetermined area in a region from a recording position where data was recorded for adjustment processing that could not be completed normally to a recording position for recording data for the next adjustment processing. Data is recorded with a light beam of recording power. Therefore, it is possible to clearly distinguish an area in the vicinity of the area where the adjustment process cannot be normally performed for some reason from the area used for the normal adjustment process, and to update the area where the adjustment process cannot be performed normally. It is possible to avoid the execution of the adjustment processing as described above, and to use it for analysis and analysis in a recording medium.

  Hereinafter, a disk recording / reproducing apparatus according to the present invention will be described in detail with reference to the drawings showing an optical disk apparatus as an embodiment thereof. FIG. 1 is a block diagram showing a configuration example of a main part of an optical disc apparatus as a disc recording / reproducing apparatus according to the present invention. In FIG. 1, reference numeral 1 shows an optical disc apparatus as a disc recording / reproducing apparatus of the present invention.

  In the present embodiment, an optical disk apparatus 1 that performs data recording / reproduction processing on the optical disk 1a only with a laser beam (light beam) from the pickup 11 will be described as an example. However, the present invention is not limited as long as data is recorded / reproduced on / from a disk-shaped recording medium using a laser beam. For example, the present invention can also be applied to a magneto-optical disk recording / reproducing apparatus for recording / reproducing data on / from a magneto-optical disk using a laser beam from the pickup 11 and a magnetic field from a magnetic head. Therefore, as a recording medium, an optical disk such as CD-R, CD-RW, DVD-R, DVD-RW, DVD-RAM, DVD + RW, or magneto-optical disk such as MO can be used.

  The optical disc apparatus 1 of the present embodiment irradiates the surface of the optical disc 1a rotated by the rotation driving unit 14 and the rotation driving unit 14 for rotating the optical disc 1a mounted on a mounting tray (not shown) with laser light. A pickup 11 that performs data recording / reproduction processing, an RF signal generation unit 12 that generates an RF signal from an electrical signal that the pickup 11 reproduces and outputs data recorded on the optical disc 1a, and an RF signal generated by the RF signal generation unit 12 And an OPC processing unit 13 for performing OPC processing based on the above.

  Further, the optical disc apparatus 1 includes a control unit 10 constituted by a CPU (Central Processing Unit) or MPU (Micro Processor Unit) in which a ROM and a RAM are incorporated. The control unit 10 controls the operation of each hardware unit as described above, and appropriately reads and executes a control program stored in advance in a ROM built in the controller. In the ROM, various control programs necessary for operating the optical disc apparatus 1 as a disc recording / reproducing apparatus according to the present invention are stored in advance. The RAM is configured by SRAM, flash memory, or the like, and temporarily stores data generated when the control unit 10 executes the control program.

  The rotation drive unit 14 includes a motor that rotates the optical disc 1a, a motor drive circuit that drives the motor in accordance with control by the control unit 10, and the like. Such a rotation drive unit 14 rotates the optical disc 1 a at a constant angular velocity (CAV) or a constant linear velocity (CLV) in accordance with an instruction from the control unit 10.

  The pickup (recording means, reproducing means) 11 is disposed opposite to the optical disc 1a, and includes a laser diode that irradiates the surface of the optical disc 1a with laser light, a laser diode drive circuit that drives the laser diode, and the like. The pickup 11 irradiates a recording power laser beam when recording data on the optical disc 1a, and a reproducing power laser beam when reproducing data on the optical disc 1a. When the control unit 10 appropriately controls the rotation driving unit 14 and the pickup 11, the optical disc apparatus 1 records data by the pickup 11 at an appropriate address on the optical disc 1 a rotated by the rotation driving unit 14. Processing or reproduction processing can be performed.

  When the optical disc apparatus 1 reproduces data from the optical disc 1 a, the pickup 11 converts the reflected light from the optical disc 1 a of the laser beam irradiated by itself into an electrical signal and outputs it to the RF signal generator 12. Further, when the optical disc apparatus 1 records data on the optical disc 1a, the control unit 10 responds to the data to be recorded on the optical disc 1a based on the recording pulse width, recording power, and the like set in advance as optimum recording conditions. The generated recording pulse is generated and output to the pickup 11. The pickup 11 irradiates a laser beam in accordance with the recording pulse output from the control unit 10 and performs data recording processing at an appropriate address on the optical disc 1a.

  The RF signal generation unit 12 performs amplification processing on the electrical signal output from the pickup 11 and binarizes the amplified electrical signal based on a predetermined threshold voltage. The RF signal generation unit 12 performs a clock detection process using a PLL (Phase Locked Loop) circuit on the binarized signal obtained by the binarization process, and outputs the binarized signal based on the detected clock signal. By performing the decoding process, an RF signal that is a reproduction signal is generated. The RF signal obtained in this way is output to the OPC processing unit 13. Further, the RF signal generation unit 12 performs a process of detecting an error (error) of the data caused by noise at the time of data reproduction processing by the pickup 11, a scratch or dirt on the optical disc 1a, and the error correction is performed. Data correction processing is also performed if possible.

  The OPC processing unit 13 performs various processes in the OPC process for the pickup 11 to irradiate laser light having an optimum recording power. Specifically, the pickup 11 performs a recording process on a preset PCA (Power Calibration Area) area (test area) on the optical disc 1a while changing the recording conditions step by step, and then the PCA. OPC processing (adjustment processing) in which the OPC processing unit (adjustment means) 13 determines the optimum recording power based on the RF signal generated by the RF signal generation unit 12 when the data recorded in the area is reproduced. ).

  More specifically, the OPC processing unit 13 performs the maximum value A1 within a predetermined period for each recording condition with respect to the RF signal obtained by reproducing the data recorded in the PCA area on the optical disc 1a. Then, the β value is calculated by substituting the minimum value A2 into the following formula 1. In addition, a preset optimum β value is stored in a memory (not shown). Therefore, the OPC processing unit 13 can identify the optimum recording power by comparing each β value calculated for each recording condition with the optimum β value stored in the memory.

  β = (A1 + A2) / (A1-A2) (Formula 1)

  The recording power specified in this manner is the optimum recording power for the optical disc 1a, and this recording power is stored in a predetermined memory and used in the subsequent recording processing for the optical disc 1a. In the case where the optical disk apparatus 1 is configured to perform the running OPC process for sequentially adjusting the recording power as described above while performing the data writing process on the optical disk 1a, the recording power specified as described above. Is used in the recording process for the corresponding area on the optical disc 1a.

  Further, when the pickup 11 performs the reproduction process of the PCA area on the optical disc 1a, the OPC processing unit 13 performs the binarization signal obtained by the binarization processing by the RF signal generation unit 12 and the clock by the PLL circuit. The jitter value of the RF signal may be calculated based on the phase difference from the clock signal detected by the detection process, and the optimum recording power may be determined based on the calculated jitter value. Specifically, the OPC processing unit 13 calculates a jitter value corresponding to each recording power set in stages for the OPC processing, and the calculated jitter value is, for example, a minimum value. Is determined as the optimum recording power. Note that a separate jitter measurement unit may be provided in the optical disc apparatus 1, and the jitter value may be measured by the jitter measurement unit.

  Based on the optimum recording power determined based on the β value or jitter value in the RF signal as described above, the control unit 10 generates a recording pulse corresponding to the data to be recorded on the optical disc 1a, and the pickup 11 The reliability of the data written on the optical disc 1a can be ensured by irradiating the laser beam in accordance with the recording pulse generated by the control unit 10 and performing the data recording process on the optical disc 1a.

  Here, in the optical disc apparatus 1 according to the present embodiment, the OPC processing unit 13 causes the β value corresponding to each recording power calculated based on the RF signal to not be the optimum β value stored in advance in the memory. The control unit 10 is notified of the fact that the OPC process has not ended normally. The control unit 10 operates as a determination unit that determines whether or not the OPC processing is normally completed according to the notification from the OPC processing unit 13. As a case where the OPC processing does not end normally, for example, there is a case where the OPC processing is performed on an area where dust, dirt, scratches, or the like on the optical disc 1a are attached.

  FIG. 2 is an explanatory diagram for explaining the OPC processing by the optical disc apparatus 1 according to the present invention. FIG. 2 schematically shows the optical disc 1a and also shows a part of the PCA area set on the optical disc 1a in an enlarged manner. Concentric (spiral) tracks are formed on the optical disc 1a, and the optical disc apparatus 1 according to the present embodiment has a track on the inner circumference side from the outer circumference side track of the optical disc 1a in the PCA area on the optical disc 1a. The OPC process is sequentially executed in a spiral manner. For each track, the OPC process is executed in the direction indicated by the white arrow A in FIG. Note that broken lines in FIG. 2 schematically show areas (recording positions) used for the respective OPC processes in the respective tracks on the optical disc 1a.

  In FIG. 2, 101 indicates an area in the Nth OPC process, 102 indicates an area in the (N + 1) th OPC process, and 104 indicates an area in the (N + 2) th OPC process. 2 indicates dust, dirt, scratches or the like (hereinafter, representatively referred to as dust) on the optical disc 1a, and it is assumed that the OPC process performed on the area 102 has not been completed normally. .

  In the optical disc apparatus 1 according to the present embodiment, when the OPC process does not end normally as described above, that is, when the OPC process fails for some reason, the control unit 10 starts from the area 102 where the failed OPC process is performed. The recording medium operates as a position changing means for changing the recording position to a predetermined number of tracks in the area 102, in the area 104 in the two inner tracks in FIG. Accordingly, the control unit 10 causes the OPC processing unit 13 to execute the next OPC process on the area 104 whose recording position has been changed in this way.

  Note that the control unit 10 sets a predetermined value for a region 103 (a hatched portion in FIG. 2) from the region 102 where the failed OPC processing is performed to the region 104 where the OPC processing is performed next. The recording process using the laser beam with the recording power of is performed by the pickup 11, and after the recording process to the area 103 is completed, the recording process of data in the next OPC process for the area 104 is executed by the pickup 11.

  Here, on the optical disc 1a, various kinds of information necessary for recording data on the optical disc 1a are recorded in advance by the manufacturer, and the above-mentioned predetermined recording power is the manufacturing information as described above. Recording power recorded in advance on the optical disc 1a by the manufacturer is used. Note that as the above-described preset recording power, the optimum recording power determined by the OPC process that has been normally executed before the failed OPC process may be used. In the area 103 where the recording process is performed with a predetermined recording power set in advance, the track of the area 102 where the failed OPC process is performed and the track of the area 104 where the next OPC process is performed are separated by a predetermined number. For example, it is an area for 5 ECC blocks (1 ECC block is 16 sectors). The size of this area is stored in advance in, for example, the ROM of the control unit 10.

  As a result, when the (N + 1) th OPC process for the area 102 fails due to the dust 100 on the optical disc 1 a, two areas 104, two areas from the track of the area 102, which is the area 103 for 5 ECC blocks, are separated. Since the (N + 2) th OPC process is performed on the track area 104 on the inner circumference side, the possibility that the N + 2th OPC process will fail due to the dust 100 is very low. Therefore, even when the dust 100 is attached to the optical disc 1a, the OPC processing is prevented from continuously failing, enabling stable OPC processing, and the reliability of data written on the optical disc 1a. The property can be secured more stably. Further, when the (N + 1) th OPC process for the area 102 fails, the area 103 is subjected to a recording process with a laser beam having a preset recording power, so that the OPC process has failed in the area 102 and its vicinity. The area 103 can be clearly distinguished from the areas 101 and 104 that have been subjected to the normally completed OPC process.

  Hereinafter, a process for setting an optimum recording power by the OPC process in the optical disc apparatus 1 having the above-described configuration will be described. FIG. 3 is a flowchart showing the procedure for setting the optimum recording power in the optical disc apparatus 1 according to the present invention. The following processing is executed by the control unit 10 according to a control program stored in advance in a ROM built in the control unit 10.

  In the optical disc apparatus 1, the control unit 10 performs a recording process by the pickup 11 on a PCA area set in advance on the optical disc 1a, and when the pickup 11 reads and reproduces data recorded in the PCA area, Based on the RF signal generated by the RF signal generation unit 12, the OPC processing by the OPC processing unit 13 is executed (S1). The control unit 10 determines whether or not the OPC processing has been normally completed according to the notification from the OPC processing unit 13 (S2). If it is determined that the OPC processing has been normally completed (S2: YES), this OPC The recording power determined by the processing is set by storing it in its own RAM as the optimum recording power (S3) and used for the subsequent recording processing.

  When the control unit 10 determines that the OPC process has not ended normally (S2: NO), the control unit 10 performs a recording process with a predetermined recording power set by the pickup 11 (S4). The control unit 10 determines whether or not the recording process with a predetermined recording power for a predetermined area, for example, an area corresponding to 5 ECC blocks, is completed (S5), and when it is determined that the recording process has not ended (S5: NO), The process returns to step S4, and the recording process with a predetermined recording power is continued (S4).

  When it is determined that the recording process for the predetermined area has ended (S5: YES), the control unit 10 returns the process to step S1 and executes the OPC process again (S1). Specifically, the control unit 10 performs a recording process on the PCA area on the optical disc 1a by the pickup 11, and when the pickup 11 reads and reproduces data recorded in the PCA area, the RF signal Based on the RF signal generated by the generation unit 12, the optimum recording power is determined by the OPC processing unit 13.

  The control unit 10 stores the optimum recording power determined as described above in its own RAM, and should record on the optical disc 1a based on this optimum recording power in the subsequent recording processing. A recording pulse corresponding to the data is generated and output to the pickup 11. Accordingly, since the pickup 11 irradiates the laser beam with the optimum recording power according to the recording pulse output from the control unit 10, it is possible to stably ensure the reliability of the data recorded on the optical disc 1a. .

  As described above, in the optical disc apparatus 1 according to the present embodiment, when the OPC process cannot be completed normally, the area 104 that is the area 103 corresponding to 5 ECC blocks from the area 102 in which the failed OPC process was performed, that is, the area By performing the next OPC process on the area 104 of the two inner peripheral tracks from the track 102, even if the OPC process fails due to, for example, dust 100, the next OPC process may fail. Can be reduced. Further, by performing a recording process with a predetermined recording power on the area 103 corresponding to 5 ECC blocks from the area 102 where the failed OPC process was performed, the area 102 where the OPC process failed and the area 103 in the vicinity thereof are This can be clearly distinguished from the areas 101 and 104 where the OPC process has been normally completed.

  In the above-described embodiment, the optical disc apparatus 1 configured to perform the OPC process for determining the optimum recording power based on the β value within a predetermined period of the RF signal has been described as an example. However, in the optical disc apparatus 1 configured to perform the OPC process based on the jitter value within a predetermined time of the RF signal, if the calculated jitter value does not become a value that can be originally taken, it is assumed that the OPC process did not end normally and failed. What is necessary is just to comprise so that the following OPC process may be performed with respect to the area | region which separated the predetermined area | region (area | region for 5 ECC blocks in the above-mentioned embodiment) from the area | region which performed the OPC process.

  In the above-described embodiment, if the OPC process is not normally completed, the next OPC process is performed on the area 104 after performing the recording process with the predetermined recording power for the area 103 for 5 ECC blocks. The optical disc apparatus 1 configured to perform has been described. However, if the OPC process for the area 102 does not end normally, the recording process for the area 103 is performed after the next OPC process for the area 104 that is separated from the area 102 by the area 103 for 5 ECC blocks. Alternatively, the optical disk device 1 may be configured. For example, in the OPC process that is executed as an initial process when the optical disk 1a is loaded in the optical disk apparatus 1, the recording process for the area 103 may be performed when the OPC process is completed.

  Furthermore, the optical disk apparatus 1 according to the above-described embodiment performs the next OPC process on the area 104 that is separated from the area 102 where the OPC process has not been normally completed by the area 103 for a predetermined 5 ECC blocks. However, if the OPC process does not end normally in the area 102, the area 104 in the track separated from the area 102 by a predetermined number (one in FIG. 2) on the inner circumference side is used for the next OPC process. It may be an area. In this case, the next OPC process can be performed on a track in which a predetermined number of tracks have been reliably separated from the area 102 where the OPC process has not been normally completed. In the next OPC process, dust, dirt or scratches on the optical disc 1a can be obtained. Etc. can be avoided more reliably.

It is a block diagram which shows the principal part structural example of the optical disk apparatus as a disk recording / reproducing apparatus based on this invention. It is explanatory drawing of the OPC process by the optical disk apparatus based on this invention. 5 is a flowchart showing a procedure of optimum recording power setting processing in the optical disc apparatus according to the present invention. It is explanatory drawing of the conventional OPC process.

Explanation of symbols

1. Optical disc device (disc recording / playback device)
1a Optical disc (recording medium)
10 Control unit (judgment means, position change means)
11 Pickup (recording means, playback means)
13 OPC processor (adjustment means)

Claims (2)

Recording means for recording data by irradiating a light beam onto a disk-shaped recording medium on which spiral or concentric tracks are formed, and reproducing means for reproducing the data recorded by the recording means and outputting a reproduction signal A disc recording / reproducing apparatus comprising: an adjusting unit that optimally adjusts the recording power of the light beam when recording data based on the reproduction signal output by the reproducing unit;
Determination means for determining whether or not the adjustment processing by the adjustment means has been normally completed;
If the determination result by the determining means is NO, the position changing means for changing the recording position of the data to a track that is a predetermined number of distances away from the track on which the data is recorded for the adjustment process that did not end normally And
The disc recording / reproducing apparatus, wherein the recording means is configured to record data at the recording position changed by the position changing means when the judgment result by the judging means is negative.   When the determination result by the determination unit is NO, the recording unit is in a region from the recording position where the data was recorded for adjustment processing that did not end normally to the recording position changed by the position changing unit, 2. The disc recording / reproducing apparatus according to claim 1, wherein data is recorded with a light beam having a predetermined recording power.

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