JP2010218656A - Optical disk device, data recording method, and computer program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk device capable of executing OPC even when there is input data, and securing good recording quality without needing reduction in OPC processing time and its number of times, and to provide a data recording method and a computer program. <P>SOLUTION: The optical disk device includes: an optical pickup unit having a control unit; a first memory; and a second memory. The control unit includes: a means (S2) for determining whether the second memory includes a free capacity; a means (S3) for executing OPC when the second memory is determined to have the free capacity, and recording the input data in the second memory; and a means (S9) for recording data in an optical disk when the OPC is determined to have been completed. The control unit further includes: a means (S4) for reserving OPC when the second memory is determined not to have any free capacity; and a means (S7) for executing OPC when the second memory is determined to have a free capacity. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an optical disk device that reads and writes data from and to an optical disk such as a CD (Compact Disc), a DVD (Digital Versatile Disk), and a BD (Blue-ray Disc), and data that records data using the optical disk device. The present invention relates to a recording method and a computer program.

  Conventionally, optical disks such as CDs, DVDs, and BDs are widely used as data recording media, and optical disk apparatuses that read and write data from and to optical disks are widely used. In these optical discs, data is recorded in spirally formed irregularities (pits) or grooves (grooves), and the optical pickup device irradiates the beam light to the pits or grooves, and reflects the light reflected on the optical disc. Data is read and written by receiving light.

  In order to perform optimal writing (recording) on optical discs of different types from different manufacturers, it is necessary to adjust the recording strategy and recording power. When the optical pickup includes a laser diode, the recording strategy is to specify the timing of the rise, fall, signal width, etc. of the recording laser waveform signal, and the recording power is to specify the intensity of the recording laser beam Say.

  The manufacturer ID is described in advance in the CDZ (Control Data Zone) in the innermost area of the optical disc. By reading this, the manufacturer name, disc type, recommended recording power value, recommended recording strategy, etc. are obtained. can do. Although the recommended recording power value and the recommended recording strategy can be used for recording as they are, it is not always possible to perform recording suitable for the optical disc apparatus, the optical disc, the environmental temperature, and the like. Also, when adjusting both the recording strategy and recording power parameters for each recording, the adjustment becomes two-dimensional and the adjustment time is prolonged, which is not very practical. Therefore, generally only the recording power is optimized. The process for determining the optimum recording power value is referred to as OPC (Optimum Power Control). A recording test is performed on various optical discs in advance by changing the recording power, and the recording power value when optimum recording can be performed is held and used for actual recording.

  More specifically, OPC records test data with a plurality of recording powers in a test area (PCA: Power Calibration Area) of an optical disc, and obtains an asymmetry value (maximum amplitude and minimum of a reproduction signal) obtained when the test data is reproduced. The reproduction signal quality is evaluated for each recording power using the amplitude ratio), the degree of modulation, the jitter from the decoder, etc., and the optimum recording power is determined. For example, when an asymmetry value is used as an evaluation parameter for reproduction signal quality, a target asymmetry value is set, and a recording power that is the closest to the target asymmetry value among the acquired asymmetry values is set as an optimum recording power.

  In order to maintain an optimum recording state even when the temperature environment, the radial position of the optical disk, and the like change, it is preferable to execute OPC for each recording. However, since it takes time to execute OPC, it takes time to actually record, and when there is a limit to the time to start recording, such as when recording a broadcast program directly on an optical disk, It is necessary to take measures such as shortening the processing time of OPC as much as possible. Therefore, in reality, recording is performed using the recording power value when the OPC is executed in the initial stage. Therefore, there is a problem that the recording quality is deteriorated because it is not possible to cope with a change in the temperature environment and the disk radial position, and in some cases, unreproducible data may be recorded.

Patent Document 1 discloses an invention in which a trial writing area is provided in a user data area at the start of recording and OPC is performed in that area, thereby reducing the number of OPC times.
In Patent Document 2, the continuity of data to be recorded is confirmed, and when the condition is satisfied, a plurality of data are continuously recorded at a time, thereby increasing the number of additional OPC recordings and the recording processing time. A shortened invention is disclosed.
In Patent Document 3, the recording quality of the rewritable disc is improved by performing reproduction of the recorded portion of the data, executing OPC when an error occurs, and overwriting the data again with a new recording power. The illustrated invention is disclosed.

JP 2006-323968 A JP-A-9-282969 JP-A-11-45440

In the case of the above-mentioned Patent Document 1, since the OPC is directly executed in the user data area, the recording capacity is reduced, and since the OPC is executed every time recording is performed, the process is performed even when the OPC is not required. There was a problem of being made.
In the case of Patent Document 2, there is a possibility that the recording quality is lowered when the environmental temperature or the like is changed. However, since the sequence for executing the OPC is not configured at this time, the recording quality is always good. There was a problem that it was not always.
In the case of Patent Document 3, in order to check the recording quality by reproducing the data, it takes time to process, and when continuously flowing data such as TV broadcasting is recorded, the data is continuously recorded. There was a possibility that it could not be recorded. Further, even when the recording quality cannot be obtained due to a disc defect or the like, since OPC is performed again, there is a problem that the processing can be performed when there is no problem in the recording power.

  The present invention has been made in view of such circumstances, and can execute OPC even when data is input, and it is not necessary to shorten the processing time and the number of times of OPC. An object of the present invention is to provide an optical disc apparatus, a data recording method, and a computer program capable of maintaining recording quality.

  An optical disc apparatus according to the present invention records input data on an optical disc, irradiates a beam for reading the recorded data from the optical disc, and a light reflected from the optical disc. An optical disc apparatus comprising: an optical pickup having a light receiving element for receiving light; and an OPC execution means for performing OPC (optimum power control) for determining an optimum recording power value of the light irradiation section. The OPC execution means executes OPC. And a buffer memory for recording data to be input during the operation.

  The optical disk apparatus according to the present invention further comprises free capacity determining means for determining whether or not the buffer memory has enough free capacity to record data input at a time when the OPC executing means executes OPC. And the OPC executing means is configured to execute OPC when it is determined by the free capacity determining means that the free capacity is provided.

  The optical disc apparatus according to the present invention is characterized by comprising means for reserving execution of OPC when the free capacity determining means determines that the free capacity is not provided.

  The optical disc apparatus according to the present invention includes an execution determination unit that determines whether or not the OPC execution unit executes OPC. When the execution determination unit determines that the execution is performed, the OPC execution unit The execution means is configured to execute OPC.

  The optical disc apparatus according to the present invention is characterized in that the execution determining means is configured to determine that the OPC is executed when a predetermined time has elapsed.

  The optical disc apparatus according to the present invention is characterized in that the execution determination means includes at least one of a case where a temperature changes, a case where a radial position where data is recorded on the optical disc changes, and a case where the amount of light received by the light receiving element changes. In one case, it is configured to determine that the OPC is to be executed.

  The optical disc apparatus according to the present invention is characterized in that the execution determination unit is configured to determine that the OPC is executed when the temperature changes.

  The data recording method according to the present invention includes a light irradiating unit for irradiating a beam for recording input data on an optical disc, and reading the recorded data from the optical disc, and a light reflected by the optical disc. An OPC execution step for performing an OPC (Optimum Power Control) for determining an optimum recording power value of the light irradiating unit using an optical disc apparatus including an optical pickup having a light receiving element that receives light. In the data recording method to be performed, the OPC executing step records data input during execution of OPC in a buffer memory.

  The data recording method according to the present invention includes an execution determination step for determining whether or not to execute the OPC, and the OPC execution step is determined to be performed by the execution determination step In addition, OPC is executed.

  The computer program according to the present invention is a computer program having an OPC execution step for causing a computer to execute an OPC (Optimum Power Control) for determining an optimum recording power value of a light irradiating unit of an optical disc apparatus, wherein the OPC execution step Further, the present invention is characterized in that data inputted during OPC execution is recorded in a buffer memory.

In the present invention, since a buffer memory is provided and OPC can be executed even when data is input, it is not necessary to shorten the OPC processing time and the number of times, and to achieve good recording quality. Can be held.
Then, when the recording environment changes, when a predetermined time elapses, etc., the OPC is executed when there is free space in the buffer memory. The recording capacity of the disc does not decrease as in the case of executing OPC, and good recording quality can be maintained.

  According to the present invention, the input data is recorded in the buffer memory and the OPC is executed, so that it is not necessary to shorten the OPC processing time and the number of times, and to ensure good recording quality. .

It is a block diagram which shows the structure of the principal part of the optical disk apparatus based on Embodiment 1 of this invention. It is a block diagram which shows the structure of the principal part of the control part of the optical pick-up unit which concerns on Embodiment 1 of this invention. It is a flowchart which shows the procedure of the data recording process by the control part of the optical pick-up unit which concerns on Embodiment 1 of this invention. It is a flowchart which shows the procedure of the data recording process by the control part of the optical pick-up unit which concerns on Embodiment 2 of this invention.

Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof.
Embodiment 1 FIG.
FIG. 1 is a block diagram showing a configuration of an optical disc apparatus 1 such as a DVD recorder according to Embodiment 1 of the present invention.
In the optical disc apparatus 1, data such as video and audio is written (recorded and recorded) on an optical disc 11 such as a DVD, and data such as video and audio recorded on the optical disc 11 is read and output (reproduced). be able to. The optical disc device 1 includes a control device 10 that controls the operation of the entire device, and an optical pickup unit 2 that reads and writes data from and to the optical disc 11.

  For example, the control device 10 causes the optical pickup unit 2 to write data such as video and audio received by a tuner or the like together with a write request, thereby writing the data on the optical disc 11. In addition, the control device 10 gives a read request to the optical pickup unit 2 to read data from the optical disc 11 and output video and audio related to this data. The control device 10 gives data to be written to the optical disc 11 to the optical pickup unit 2 via the first memory 8, and the optical pickup unit 2 gives the data read from the optical disc 11 to the control device 10 via the first memory 8. However, a read request, a write request, and the like by the control device 10 are given to the optical pickup unit 2 without going through the first memory 8.

The first memory 8 is composed of a memory element such as a DRAM (Dynamic Random Access Memory) or a SRAM (Static Random Access Memory) having a capacity of 1 to 4 Mbytes, for example, and is accessed from both the optical pickup unit 2 and the control device 10. It is configured to be possible.
Further, the optical disc apparatus 1 includes a second memory (buffer memory) 9 for recording input data when executing OPC. The second memory 9 is constituted by a flash memory having a capacity of 4 G to 50 G bytes, for example.
The first memory 8 and the second memory 9 may be provided in the optical pickup unit 2 or may be provided in the control device 10.

  The optical pickup unit 2 reads and writes data by irradiating the recording surface of the optical disc 11 with beam light by the optical pickup 3. The optical pickup unit 2 includes a tray (not shown) on which the optical disk 11 is placed, a tray motor 5 that generates power for sliding the tray in and out of the apparatus, and rotational movement by the tray motor 5. And a gear mechanism (not shown) for converting the movement into and out of the tray. In response to a user operation, the control device 10 gives a tray entry / exit request to the optical pickup unit 2, and the controller 7 of the optical pickup unit 2 rotates the tray motor 5 in response to the entry / exit request.

  The optical pickup unit 2 includes a spindle motor 4 that rotates the optical disk 11 placed on the tray. The rotational speed of the spindle motor 4 changes according to the position of the optical pickup 3 (or the position of the light beam irradiated to the optical disk 11) and is controlled by the control unit 7. That is, the control unit 7 performs so-called spindle servo control for adjusting the rotation speed of the spindle motor 4.

  The optical pickup unit 2 includes a thread motor 6 that generates power for moving the optical pickup 3 in the radial direction of the optical disk 11, and a gear mechanism that converts the rotational movement of the thread motor 6 into movement of the optical pickup 3. A so-called thread feeding mechanism (not shown) is provided. The rotation of the thread motor 6 is controlled by the control unit 7 so that the optical pickup 3 moves to a data reading position or a writing position for the optical disk 11.

  Although not shown, the optical pickup 3 includes a laser diode that emits beam light, an optical element such as a lens that collects and irradiates the beam light emitted by the laser diode on the recording surface of the optical disc 11, and the optical disc 11. A light receiving element for receiving the reflected beam light, and an actuator for moving these in the horizontal direction and the vertical direction with respect to the recording surface of the optical disc 11. An electric signal corresponding to the light received by the light receiving element of the optical pickup 3 is given to the control unit 7, and the control unit 7 controls the drive of the laser diode and the actuator of the optical pickup 3.

  The control unit 7 reads or writes data from / to the optical disc 11 by adjusting the intensity of the beam light emitted from the optical pickup 3. The intensity of the beam light when writing data to the optical disk 11 is stronger than the intensity of the beam light when reading data, and the data is written using a change in the crystal structure of the optical disk 11 due to irradiation of the beam light. As the intensity of the beam light at the time of writing, an optimum recording power value obtained by executing OPC described later is set.

  The control unit 7 adjusts the focal length of the beam light, so-called focus, by driving the actuator of the optical pickup 3 and performing control to move the laser diode, the optical element, and the like in the direction perpendicular to the recording surface of the optical disc 11. Servo is performed. The control unit 7 generates a focus error signal indicating the focus error of the beam light from the electrical signal given from the optical pickup 3, and performs focus servo based on this signal. The generation of the focus error signal is performed based on a known technique such as an astigmatism method or a Foucault method.

  In addition, the control unit 7 adjusts the irradiation position of the beam light by driving the actuator of the optical pickup 3 and performing control to move the laser diode, the optical element, and the like in the horizontal direction with respect to the recording surface of the optical disk 11. A so-called tracking servo is performed.

FIG. 2 is a block diagram illustrating a configuration of a main part of the control unit 7 of the optical pickup unit 2. The control unit 7 includes a signal processing circuit 71, an MPU (Micro Processor Unit) 72, a ROM 73, and a drive circuit 74. The MPU 72 performs a required control process based on a program recorded in the ROM 73. The ROM 73 also stores a data recording processing program (computer program) according to the present invention.
The MPU 72 executes OPC according to the program recorded in the ROM 73. When OPC is executed, an RF signal value obtained when test data is recorded with a plurality of recording powers is input from the optical pickup 3 to the signal processing circuit 71. The signal processing circuit 71 calculates an asymmetry value based on the RF signal value and outputs it to the MPU 72. The MPU 72 sets the recording power value that is the closest to the target asymmetry value among the acquired asymmetry values as the optimum recording power value. Alternatively, the optimum recording power value is calculated from the power dependency data of the asymmetry value. The MPU 72 outputs the optimum recording power value to the drive circuit 74, and the power of the beam light output from the optical pickup 3 when recording is set.

The data recording method according to the first embodiment will be described below.
The control unit 7 (MPU 72) reads a data recording processing program recorded in the ROM 73 and performs data recording processing according to the program.
FIG. 3 is a flowchart illustrating a procedure of data recording processing by the control unit 7 of the optical pickup unit 2 according to the first embodiment.
First, the control unit 7 determines whether a recording request has been accepted (S1). If it is determined that the recording request is not accepted (S1: NO), this determination is repeated.
When it is determined that the recording request has been received (S1: YES), the control unit 7 determines whether the second memory 9 has free space (S2). Here, when the free capacity of the second memory 9 is equal to or larger than the capacity calculated by [(amount of data input to the optical pickup unit 2 / second) × OPC processing time (seconds)], It is determined that there is free space.

If it is determined that there is free space (S2: YES), the control unit 7 advances the process to step S3.
If it is determined that there is no free space (S2: NO), the controller 7 reserves OPC and records the input data on the optical disc 11 via the first memory 8 (S4).
Then, the control unit 7 determines whether the recording is finished (S5). If it is determined that the recording has not ended (S5: NO), the process returns to step S2.
When it is determined that the recording is finished (S5: YES), the control unit 7 determines whether or not there is free space in the second memory 9 (S6). If it is determined that there is no free space (S6: NO), this determination is repeated.
When it is determined that there is free space (S6: YES), the control unit 7 executes the above-described OPC (S7) and ends the data recording process.

In step S <b> 3, the control unit 7 executes OPC and records data input during that time in the second memory 9.
And the control part 7 determines whether OPC was complete | finished (S8). If it is determined that the OPC has not ended (S8: NO), this determination is repeated.
If the control unit 7 determines that the OPC has been completed (S8: YES), the optical disk 11 uses the data recorded in the second memory 9 and the data input after the OPC is executed based on the optimum recording power value determined by the OPC. (S9).
The control unit 7 determines whether the recording is finished (S10). If it is determined that the recording has not ended (S10: NO), this determination is repeated.
When it is determined that the recording is finished (S10: YES), the control unit 7 finishes the data recording process.

  In this embodiment, since the optical disk apparatus 1 includes the second memory 9, OPC can be executed while primary recording of input data, and the OPC processing time can be shortened or the number of times can be limited. It is possible to always ensure stable recording quality.

Embodiment 2. FIG.
The optical disc apparatus according to the second embodiment of the present invention has the same configuration as the optical disc apparatus 1 according to the first embodiment, and the data recording process by the control unit 7 is different from the data recording process according to the first embodiment. In the present embodiment, the controller 7 is configured to execute OPC when it is determined that it is a case where the OPC is executed and when it is determined that the second memory 9 has a free space.

The data recording method according to the second embodiment will be described below.
The control unit 7 (MPU 72) reads a data recording processing program recorded in the ROM 73 and performs data recording processing according to the program.
FIG. 4 is a flowchart illustrating a procedure of data recording processing by the control unit 7 of the optical pickup unit 2 according to the second embodiment.
First, the control unit 7 determines whether a recording request has been accepted (S21). If it is determined that a recording request has not been accepted (S21: NO), this determination is repeated.
When it is determined that the recording request has been received (S21: YES), the control unit 7 determines whether or not the temperature change from the previous OPC execution is equal to or greater than the threshold (S22). For example, it is determined whether or not the temperature change exceeds a range of ± 10 ° C.

When it determines with the temperature change being more than a threshold value (S22: YES), the control part 7 advances a process to step S26.
When it is determined that the temperature change is less than the threshold value (S22: NO), the control unit 7 determines whether or not the radial position for recording data on the optical disk 11 has changed (S23). The control unit 7 determines whether or not the zone has been switched when the optical disk 11 is divided into several zones in the radial direction. When it is determined that the radial position has changed (S23: YES), the control unit 7 advances the process to step S26.

When it is determined that the radial position has not changed (S23: NO), the controller 7 determines whether or not the change in the amount of light received by the light receiving element of the optical pickup 3 is equal to or greater than the threshold (S24). When dust, dust, or the like adheres to the objective lens for condensing the beam light mounted on the optical pickup 3, the ratio of the beam light reaching the optical disk 11 is decreased, reflected by the optical disk 11, and returned as return light. The amount of light received by the light receiving element in the optical pickup 3 decreases. The controller 7 determines whether or not the amount of change in the amount of received light is equal to or greater than a threshold value.
When it is determined that the change in the amount of received light is equal to or greater than the threshold value (S24: YES), the control unit 7 advances the process to step S26.

When it is determined that the change in the amount of received light is less than the threshold (S24: NO), the control unit 7 determines whether a predetermined time has elapsed since the previous OPC was executed (S25). Here, the case where the optical disk apparatus 1 has not been used for a long time is included.
When it is determined that the predetermined time has elapsed (S25: YES), the controller 7 advances the process to step S26.
When it is determined that the predetermined time has not elapsed (S25: NO), the control unit 7 advances the process to step S33.

  In step S26, the control unit 7 determines whether or not there is free space in the second memory 9 (S26). Here, when the free capacity of the second memory 9 is equal to or larger than the capacity calculated by [(amount of data input to the optical pickup unit 2 / second) × OPC processing time (seconds)], It is determined that there is free space.

If the control unit 7 determines that there is free space (S26: YES), the process proceeds to step S31.
When it is determined that there is no free space (S26: NO), the control unit 7 reserves OPC and records the input data on the optical disc 11 via the first memory 8 (S27).
Then, the control unit 7 determines whether the recording is finished (S28). If it is determined that the recording has not ended (S28: NO), the process returns to step S26.
When it is determined that the recording is finished (S28: YES), the control unit 7 determines whether or not there is a free space in the second memory 9 (S29). If it is determined that there is no free space (S29: NO), this determination is repeated.
When it is determined that there is free space (S29: YES), the control unit 7 executes OPC (S30) and ends the data recording process.

In step S <b> 31, the control unit 7 executes OPC and records data input during that time in the second memory 9.
The control unit 7 determines whether or not the OPC has ended (S32). If it is determined that the OPC has not ended (S32: NO), this determination is repeated.
When the control unit 7 determines that the OPC has ended (S32: YES), the optical disk 11 uses the data recorded in the second memory 9 and the data input after the execution of the OPC with the optimum recording power value determined by the OPC. (S33). If it is determined in step S25 that the predetermined time has not elapsed and it is not necessary to execute OPC, the input data is recorded on the optical disc 11 via the first memory 8.
The control unit 7 determines whether the recording is finished (S34). If it is determined that the recording has not ended (S34: NO), this determination is repeated.
When the control unit 7 determines that the recording is finished (S34: YES), the data recording process is finished.

In the present embodiment, the second memory 9 is provided. When the environmental temperature, the radial position, the amount of received light, etc. change, when a predetermined time has elapsed and the second memory 9 has free space, Since OPC is executed, excessive OPC is not executed, and unlike the case where OPC is executed in the user data area, the recording capacity is not reduced and stable recording quality can always be ensured. It is.
As described above, even under various conditions, stable recording can be performed at all times, so that it is possible to prevent data recording from failing and the disc from being used. Since the number of discs necessary for recording data can be minimized, a material saving effect can be expected.

In the present embodiment, the contents of steps S22, S23, S24, and S25 in the flowchart of FIG. 4 correspond to “execution determination means” in the claims, but the processing is performed in the order of steps S22, S23, S24, and S25. It is not limited to the case where is made. However, it is preferable to prioritize the step of determining whether or not the temperature change is greater than or equal to the threshold value.
Further, the present invention is not limited to the case where all the processes of steps S22, S23, S24, and S25 are performed. Further, the contents of the execution determination means are not limited to the contents of steps S22, S23, S24, and S25.

In the first and second embodiments, the case where the optical disc apparatus 1 includes the first memory 8 and the second memory 9 is described. However, the present invention is not limited to this, and the second memory 9 is not included. Only the first memory 8 may be provided, and the data input when the OPC is executed may be recorded in the first memory 8.
The case where the optical disk apparatus 1 is a DVD recorder has been described. However, the present invention is not limited to this and may be another optical disk apparatus such as a BD recorder.

DESCRIPTION OF SYMBOLS 1 Optical disk apparatus 2 Optical pick-up unit 3 Optical pick-up 4 Spindle motor 5 Tray motor 6 Thread motor 7 Control part 71 Signal processing circuit 72 MPU
73 ROM
74 Drive circuit 8 First memory 9 Second memory 10 Control device 11 Optical disk

Claims (10)

An optical pickup having a light irradiating unit for irradiating a beam for recording the input data on the optical disc and reading the recorded data from the optical disc, and a light receiving element for receiving the light reflected by the optical disc And an OPC execution means for performing OPC (Optimum Power Control) for determining an optimum recording power value of the light irradiation unit,
An optical disk apparatus comprising: a buffer memory for recording data input while the OPC execution means executes OPC. The buffer memory includes free capacity determination means for determining whether or not the buffer memory has sufficient free capacity to record data to be input at a time when the OPC execution means executes OPC,
2. The optical disc apparatus according to claim 1, wherein the OPC execution means is configured to execute OPC when it is determined by the free capacity determination means that the free capacity is provided.   3. The optical disc apparatus according to claim 2, further comprising means for reserving execution of OPC when the free capacity determining means determines that the free capacity is not provided. Execution determination means for determining whether or not the OPC execution means executes OPC;
4. The apparatus according to claim 1, wherein the OPC execution unit is configured to execute OPC when it is determined that the execution is performed by the execution determination unit. 5. Optical disk device.   5. The optical disc apparatus according to claim 4, wherein the execution determination unit is configured to determine that the OPC is executed when a predetermined time has elapsed.   The execution determination unit executes OPC when the temperature changes, when the radial position where data is recorded on the optical disk changes, and when the amount of light received by the light receiving element changes. The optical disc apparatus according to claim 4, wherein the optical disc apparatus is configured to determine that this is the case.   The optical disc apparatus according to claim 6, wherein the execution determination unit is configured to determine that the OPC is performed when the temperature changes. An optical pickup having a light irradiating unit for irradiating a beam for recording the input data on the optical disc and reading the recorded data from the optical disc, and a light receiving element for receiving the light reflected by the optical disc In the data recording method for performing the recording, including an OPC execution step of executing an OPC (Optimum Power Control) for determining an optimum recording power value of the light irradiation unit using an optical disc device comprising
The OPC execution step records data input during execution of OPC in a buffer memory. An execution determination step for determining whether or not to execute the OPC;
The data recording method according to claim 8, wherein the OPC execution step executes OPC when it is determined that the execution is performed by the execution determination step. In a computer program having an OPC execution step for causing a computer to execute OPC (Optimum Power Control) for determining an optimum recording power value of a light irradiation unit of an optical disc apparatus,
The OPC execution step causes a computer to record data input during execution of OPC in a buffer memory.

Images