JP2003045032A - Optical disk control method and controller therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk control method and the device calculating optimum laser power by recognizing a position where laser power is changed and recording is performed and acquiring an accurate recording state even when a test write area to perform recording in one time is reduced in an OPC control method performing recording and reproduction by PCA. SOLUTION: Light is emitted so as to make the laser power strong and weak alternately and test write is performed. Thereafter, the reflected light quantity of the area is reproduced and the optimum laser power is obtained by the combination of the value of the reflected light quantity and recording laser power. Also, by providing a part not outputting test write laser power, the part where the power is changed is clearly detected at the time of OPC reproduction and thus, the accuracy of reflected light quantity acquisition is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device for writing data on an optical disk capable of write-once or rewriting, and reading the data written on the optical disk. More specifically, it relates to a laser power of several stages. Laser power calibration to set the record and measure the recording condition: OPC (Optimum Power Calibr
ation) recording / reproducing method and its device.

[0002]

2. Description of the Related Art In write-once or rewritable optical disk recording, the drive current to be applied to the laser is floating due to the characteristics of the optical disk and the characteristics of the recording drive. Generally, before recording to the actual data area, the power calibration area for test writing in the innermost circumference of the disc: PCA (Power Caliber)
Test writing while changing the power stepwise in the bration area (hereinafter referred to as OPC write), and the recorded PC
OPC for obtaining the optimum laser power is performed by checking the area A (hereinafter, referred to as OPC lead), and the PCA of the optical disc is dealt with at the specified position and size. Further, in recent years, in optical disc recording, many packet write recording methods are additionally implemented in which a small amount of information called a packet is written on one optical disc. Therefore, in order to increase the number of trial writing, It is desired to reduce the area for trial writing in one OPC as much as possible.

Japanese Utility Model Registration No. 059334 discloses that
A write-once type optical disk recording apparatus for additionally writing and recording various data on a write-once type optical disk is disclosed with respect to a technique that enables OPC operations to be performed on a single write-once type optical disk a number of times more than before. According to this, the test signal is recorded on the frame by the laser beam having one power level before and after the optimum power level detected in the previous power calibration operation. Therefore, the number of frames used in one power calibration operation is 3
It is described that it is possible to perform the power calibration operation once with a small number of frames, and thus it is possible to perform the power calibration operation many times with one write-once optical disc. Further, Japanese Patent Laid-Open No. 2000-99951 discloses a method of reducing the number of times of OPC itself by executing OPC only after a lapse of a predetermined time.

[0004]

However, when the recording amount in the OPC write is reduced, when the OPC read is attempted to identify the change point of the laser power at the address and time on the conventional optical disk, the laser at the next stage is detected. There is a high possibility that the power recording status will be erroneously acquired. Further, although the technique described in Utility Model Registration No. 059334 can perform OPC operations many times, it is difficult to detect the optimum power level because it is a method of sequentially increasing the recording laser power step by step. Is. In the technique disclosed in Japanese Patent Laid-Open No. 2000-99951, the operating states of the optical disc and the recording device change, and it is more desirable to determine the optimum laser power by executing OPC for each recording. In view of the above problems, the present invention provides an OPC control method for recording and reproducing in PCA,
Even if the test writing area for recording at one time is smaller than before, the optical disk recording for calculating the optimum laser power by recognizing the recorded position by changing the laser power and acquiring the accurate recording state, An object of the present invention is to provide a reproducing method and an apparatus thereof.

[0005]

In order to solve the above problems, the present invention provides an optical disk control method for irradiating a laser beam onto an information recording medium to record or reproduce information. In order to determine the optimum recording laser power of light, in the test writing area on the optical disc, the test writing write means for controlling the intensity of the recording laser power to be in the alternating order of strength and weak, and recording by the trial writing write means When the data in the trial writing area is reproduced and a reproduction level equal to or higher than a specified value is detected with respect to the reproduction level reproduced immediately before, the test writing read means for identifying the detected position as the changed portion of the recording laser power, , Is provided. OPC is an essential operation for determining the optimum recording laser power of laser light. At the same time, however, it is desirable to process the OPC operation reliably and as fast as possible. In the conventional method, the recording laser power is increased stepwise, the data is read at the time of reproduction, and the data in which the reproduction level decreases as the laser power increases is substituted into the calculation formula to determine the optimum power level. It was At this time, since the recording laser power is changed stepwise, the difference from the immediately preceding reproduction level is small, and the difference from the noise level, that is, S /
In some cases, N could not be large. Therefore, in order to obtain a large change value, a method of intentionally increasing the difference between adjacent recording laser powers and recording may be considered. According to this invention, even if the recording amount per power in the OPC write is reduced, it is possible to easily determine the recording boundary at the time of OPC reading, and thereby the accuracy of obtaining the value of the reflected light amount at each laser power can be improved. It is possible to give. Also,
According to a second aspect of the present invention, in order to determine the optimum recording laser power of the laser light, the intensity of the recording laser power is alternating in the test writing area on the optical disc in the order of strong and weak.
Moreover, it is also an effective means of the present invention to provide the trial writing write means for controlling so that the intensity difference at any laser power intensity boundary becomes equal. In the above-mentioned claim 1, the size (step) of each laser power boundary varies. When the size of the boundary is small, the possibility of making a mistake in the boundary identification is relatively higher than that in other areas.
Therefore, when determining the laser power value and its order, the OPC light is characterized in that the difference is the same at any power change boundary. According to this technical means, the degree of difficulty in determining the boundary based on the amount of reflected light becomes constant, and the accuracy of acquiring the amount of reflected light at each laser power can be uniformly increased.

According to a third aspect of the present invention, in an optical disc control method for irradiating an information recording medium with a laser beam to record or reproduce information, an optimum recording laser power of the laser beam is determined on the optical disc. Test writing write means for changing the recording laser power intensity stepwise in the trial writing area, and controlling so as not to temporarily output the recording laser power at the boundary where the recording laser power is changed, and the trial writing write means. And reproducing the data in the trial writing area recorded by the method, and, when the data is detected as unrecorded, a trial writing reading unit that identifies the detection position as a changed portion of the recording laser power. Characterize. A feature of the present invention is that, after the recording of the information amount per power is completed, the laser power is turned off for a fixed amount of recording, so that the control is always performed to change the laser power to an unrecorded area. Furthermore, although the change boundary of the recording laser power is judged based on the difference from other sample values in claim 1, it is determined whether or not the read position indicates an unrecorded state (usually, the acquired value is maximum). The feature is to judge. According to such technical means, O
The detection of the position where the power is changed during PC reading becomes more apparent, and the accuracy of acquiring the reflected light amount at each laser power can be further increased. According to a fourth aspect of the invention, in order to determine the optimum recording laser power of the laser light, the recording laser power intensity is changed stepwise in the trial writing area on the optical disk, and the recording laser power is changed. It is also an effective means of the present invention to provide a trial writing write means for temporarily controlling the recording laser power to erase light emission. In the third aspect, the laser power is turned off at the boundary where the recording laser power is changed. However, if the laser beam is turned off and then returned to the recording state, it takes time to stabilize the light emission. Therefore, at the boundary where the recording laser power is changed, the power is not set to 0 at all, but the system controller controls the laser control unit to keep the erase power constant. According to such a technical means, it is possible to restart recording with stable laser emission even immediately after the unrecorded state is set at the laser power change boundary with respect to a rewritable optical disk medium such as a CD-RW. It is possible to improve the accuracy of acquiring the reflected light amount with power.

According to a fifth aspect of the present invention, in the optical disc control method of irradiating an information recording medium with a laser beam to record or reproduce information, the optimum recording laser power of the laser beam is determined on the optical disc. Test writing write means for changing the recording laser power intensity stepwise in the test writing area for recording, and the trial writing write means for reproducing the data in the test writing area recorded by the test writing area. It is characterized by further comprising: a test writing read unit that generates the same recording data and identifies the changed position of the recording laser power by timing the generation amount. Data modulator is OP
It also operates during C read, and notifies the system controller when a predetermined amount is output in a pseudo manner. It is characterized in that the notification due to the output of the specified amount of data by the data modulator is determined to be the next power recording area when it is in the system controller. According to such a technical means, the changed position of the recording laser power in the OPC read can be accurately identified regardless of the recording method with the OPC write, and the accuracy of the reflected light amount acquisition with each laser power can be improved. It will be possible. According to a sixth aspect of the present invention, in an optical disc control apparatus for irradiating a laser beam on an information recording medium to record or reproduce information, a trial writing area on the optical disc for determining an optimum recording laser power of the laser beam. In addition, the test writing write means for controlling the intensity of the recording laser power to be in an alternating order of strength and weakness, and the data of the test writing area recorded by the test writing write means is reproduced, and the reproduction level is set to the reproduction level reproduced immediately before. On the other hand, when a reproduction level equal to or higher than a specified value is detected, a trial writing read means for identifying the detected position as a changed portion of the recording laser power is provided. According to a seventh aspect of the present invention, in order to determine the optimum recording laser power of the laser light, in the test writing area on the optical disk, the intensity of the recording laser power is alternating between strong and weak, and which laser power intensity is used. It is also an effective means of the present invention to provide a trial writing means for controlling so that the intensity difference at the boundary is also equalized.

According to the invention of claim 8, in an optical disk control device for irradiating an information recording medium with a laser beam to record or reproduce information, an optimum recording laser power of the laser beam is determined on the optical disk. Test writing write means for changing the recording laser power intensity stepwise in the trial writing area, and controlling so as not to temporarily output the recording laser power at the boundary where the recording laser power is changed, and the trial writing write means. And reproducing the data in the trial writing area recorded by the method, and, when the data is detected as unrecorded, a trial writing reading unit that identifies the detection position as a changed portion of the recording laser power. Characterize. According to a ninth aspect of the present invention, in order to determine the optimum recording laser power of the laser light, the recording laser power intensity is changed stepwise in the trial writing area on the optical disc, and the boundary for changing the recording laser power is set. It is also an effective means of the present invention to provide a trial writing write means for temporarily controlling the recording laser power to erase light emission. According to a tenth aspect of the invention, in an optical disc control apparatus for irradiating a laser beam on an information recording medium to record or reproduce information, a trial writing area on the optical disc for determining an optimum recording laser power of the laser beam. In addition, in the case of reproducing the data of the trial writing area recorded by the trial writing writing means by changing the recording laser power intensity stepwise and recording, the same recording as the trial writing writing means is performed. And a test write read unit that generates data and identifies the changed position of the recording laser power by timing the generated amount.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the embodiments shown in the drawings. However, the constituent elements, types, combinations, shapes, relative arrangements, and the like described in this embodiment are merely explanatory examples, not the gist of limiting the scope of the present invention thereto, unless specifically stated. .. FIG. 1 is a block diagram showing the configuration of an optical disk drive device according to an embodiment of the present invention. The configuration of the present optical disc drive device is such that an optical disc medium 1 on which information is recorded or read by laser light, a drive motor 8 for rotationally driving the optical disc medium 1, and an LD (Laser) for irradiating the optical disc medium 1 with laser light. Diode)
Or a photodetector PD (Photo Decoder) that receives the reflected light returned from the LD by the laser light reflected from the optical disk medium 1.
a pickup unit 2 including a tector), a servo unit 10 that controls the rotation of the drive motor 8 to control tracking and focusing of the pickup unit 2, a laser control unit 3 that controls the current of a laser diode, and a pickup. An analog signal processing unit 5 for processing a signal from the unit 2, an A / D conversion block unit 6 for converting the reflected light amount into a numerical value, and a data demodulation unit 9 for converting the user data.
Data modulator 4 for converting to pit format data for recording
And a system controller 7 for controlling the whole. Incidentally, the pickup unit 2, the drive motor 8, the servo unit 10, the laser control unit 3, the data modulation unit 4, and the system controller 7 mainly constitute a trial writing write means, and the pickup unit 2, the drive motor 8, the servo unit 10,
The laser control unit 3, the analog signal processing unit 5, and the data demodulation unit 9 mainly constitute trial writing read means.

Next, the operation of the optical disk drive device of the present configuration will be described. In FIG. 1, solid arrows indicate the main direction of data, and dotted arrows indicate the main direction of control signals (commands). The optical disc medium 1 on which information is recorded or read by laser light has a track which is a circular recording groove from the inner circumference to the outer circumference, and is rotated by the drive motor unit 8. The pickup unit 2 includes an LD (Laser Diode) for irradiating the optical disc medium 1 with laser light,
A photodetector PD (Photo Detect) for receiving the laser light from the LD, which is reflected by the optical disk medium 1 and returned.
or) etc. The optical signal received by the PD is converted into an electrical signal and processed by the analog signal processing section 5. The received optical signal is converted by the A / D conversion block unit 6 into a numerical value indicating the amount of reflected light. The system controller 7 controls the timing of these A / D conversions and the acquisition of converted values. In the analog signal processing unit 5, the pickup unit 2 is also used.
Control signals such as a track error signal and a focus error signal among the information from the above are sent to the servo unit 10, and the servo unit 10 performs servo control on the pickup unit 2 to perform tracking and focusing. The servo unit 10 also controls the drive motor unit 8 for spindle rotation. Further, the information read during the normal reproduction is transmitted from the analog signal processing unit 5 to the data demodulation unit 9
And converted to user data. The user data is temporarily stored in the RAM or the like in the system controller unit 7 and passed to the host computer through an external interface (not shown). On the other hand, the data to be recorded is stored in a RAM or the like in the system controller unit 7 having a function as a data buffer from an unillustrated host computer through an external interface.
After that, it is sent from the RAM of the system controller section 7 to the data modulation section 4 and converted into pit format data for recording, and further sent to the laser control section 3 to apply the current of the light emission pattern to the LD of the PU section 2. Then, the laser light is irradiated and recorded on the optical disc medium 1. The data modulator 4 can also be operated during reading, and notifies the system controller unit 7 of the timing of the modulated data amount. At this time, the laser control unit applies a constant current corresponding to the read power output to the LD of the PU unit 2 regardless of the output data of the data modulation unit 4. The system controller unit 7 issues a control command, such as the above-mentioned A / D conversion instruction of the amount of reflected light, to each of the other block units directly, indirectly, or at a timing to instruct switching of data or signal processing. By issuing the data, a series of control operations between the respective block parts are realized, and the overall optical disc recording control device is generally controlled. The system controller unit 7 includes a CPU that executes control, a ROM that stores a control procedure thereof as a program, a work area, a RAM that is used as a data buffer, and the like. A feature of the present invention is a control procedure between the laser controller 3, the A / D converter 7, and the data modulator 4 by the system controller 7 during OPC.

The operation of the embodiment of the present invention performed in the OPC in the optical disc information recording apparatus having the block diagram of FIG. 1 will be described in detail below with reference to the drawings. Figure 2
In the first embodiment of the present invention, the system controller unit 7 in FIG. 1 performs trial writing in OPC (OPC write).
It is a flow chart which shows the control procedure performed at the time. First,
When performing trial writing, the value of the laser power that changes in stages and the order thereof are determined (step S1). Figure 3
FIG. 4 is a diagram showing power fluctuations in a normal OPC light. The power is sequentially increased like P1 to P10 in the order of addresses in the PCA area. On the other hand, in the present invention, as shown in FIG. 4, the power recording order is P1, P4,
A combination of large and small such as P2 is used. Next, when the laser power and its recording order are determined in step S1, a normal OPC write such as setting the first laser power in the laser control unit 3 or moving the pickup unit 2 to a position in the PCA area for recording is performed. Is prepared (step S2). Next, when the laser beam emitted from the pickup unit 2 reaches the recording scheduled position, the recording light is emitted (step S3) and the process is continued until a predetermined amount of information per power is recorded (step S4). When the recording is completed (YES route), it is judged whether the recording with all the laser powers set in step S1 is completed (step S5). If not completed (NO route), the next OPC write determined in step S1. Power (P4 in Figure 4)
Is set in the laser control unit 3 (step S6) and the process returns to step S4 to repeat recording. If it is determined in step S5 that all recording has been completed (YES route), recording light emission is stopped (step S7), and the OPC write operation is ended.

FIG. 5 shows that a test-written region of the first embodiment of the present invention is irradiated with a laser beam of read power,
Measure the amount of light reflected from the optical disk (OPC read)
It is a flow chart which shows the control procedure performed at the time. First,
Normal preparation for OPC reading such as moving the pickup unit 2 to the position recorded by the above-mentioned OPC write is performed (step S11). When the preparation is completed and the position where the laser light emitted from the pickup unit 2 is recorded is measured, the amount of reflected light is measured at the position recorded with the first recording laser power (P1 in FIG. 4) set in step S1 of FIG. The reproduction state value is stored in the RAM of the system controller (step S12). Next, the value of the reflected light amount is actually acquired by sampling the RF signal from the analog signal processing unit 5 through the A / D conversion unit 6 (step S13). By this, the recording condition can be determined. If the acquired value is not the first acquired value at which the recording power has changed, it is determined whether or not there is a large difference between the acquired value and the acquired value at the same recording laser power (step S14). If the acquired value is not much different from the others (NO route), the acquired value is stored (step S15), and the process returns to step S13 to repeat the acquisition of the reflected light amount. If there is a large difference in the determination in step S14 (YES route), it is determined whether or not the OPC read is completed based on the change in the storage setting in step S12 corresponding to the laser power change in step S1 of FIG. 2 ( (Step S16), if so (NO route), the process returns to step S12 and continues to acquire the reproduction state value of the position recorded with the next recording laser power (P4 in FIG. 4). If it is determined that it is completed in step S16 (YES route), the process proceeds to step S17. In step S17, the optimum laser power is calculated based on the combination of the value of the reflected light amount and the recording laser power acquired so far, the setting value is set in the laser control unit 3 (step S17), and the process ends. The present invention is characterized by the order of laser power fluctuations in the OPC write and the laser power fluctuation detection based on the acquired value in the OPC read, and any method may be used to calculate the optimum laser power in step S17. . As described above, even if the recording amount per power in the OPC write is reduced, the recording boundary can be easily determined during the OPC read, and the accuracy of acquiring the value of the reflected light amount at each laser power can be improved. It will be possible.

FIG. 6 is a diagram showing the relationship between the address in the PCA and the laser power during OPC writing according to the second embodiment of the present invention. In the above description, the size (step) of each laser power boundary in FIG. 4 varies from P3 to P2 to P5. When the size of the boundary is small, the possibility of making an error in the boundary identification is relatively higher than that at other places. Therefore, in determining the laser power value and the order thereof in S1 of FIG. 2, P1, P6,
It is a feature of the OPC light that the difference is equal at any power change boundary by setting P2, P7, P3, P8, P4, P9, P5, and P10. As a result, the degree of difficulty in determining the boundary based on the amount of reflected light becomes constant, and the accuracy of acquiring the amount of reflected light at each laser power can be increased uniformly. FIG. 7 is a flow chart showing the control procedure of the OPC light of the third embodiment of the present invention. In FIG. 7, the same control as that in FIG. 1 is indicated by the same step number (S), and thus the overlapping description will be omitted. In FIG. 7, after the recording of the amount of information per power is completed (step S4), the laser power is turned off for a certain amount of recording, so that the unrecorded area is always set when the laser power is changed. The feature is that (step S20) is entered. FIG. 8 is a flowchart showing the control procedure of the OPC lead according to the third embodiment of the present invention.
In FIG. 8, the same control as that in FIG. 5 is indicated by the same step number (S), and thus the duplicate description will be omitted. In FIG. 5, the change boundary determination of the recording laser power is performed in step S
Although it was carried out based on the difference from other sample values of 14, in FIG. 8, it is judged whether or not the read position indicates an unrecorded state (usually, the acquired value is maximum) (step S2).
The feature is 1). As a result, the detection of the location where the power is changed during OPC reading becomes more apparent, and the accuracy of acquisition of the amount of reflected light at each laser power can be further increased.

As a fourth embodiment of the present invention, when the laser power is turned off and then the recording state is restored again, there is a problem that it takes time for the emission to stabilize. It is characterized in that the system controller unit 7 controls the laser control unit 3 so that the erase power is constant, instead of setting the power to zero at step S20 in FIG. As a result, recording can be restarted with stable laser emission even immediately after the unrecorded state at the laser power change boundary for a rewritable optical disc medium such as a CD-RW, and the amount of reflected light at each laser power can be obtained. It is possible to improve the accuracy of. Figure 9
8 is a flowchart showing a control procedure of an OPC lead according to a fifth embodiment of the present invention. The data modulator 4 in FIG.
It operates even during PC reading, and notifies the system controller unit 7 when a predetermined amount is artificially output. Note that, in FIG. 9, the same procedure as that in FIG. 5 is indicated by the same step number (S), and thus the duplicate description will be omitted. In step S22 of FIG. 9, when the system controller section 7 is notified that the data modulation section 4 has output the specified data amount, it is determined to be the next power recording area. As a result, it is possible to accurately identify the changed position of the recording laser power in the OPC read regardless of the recording method with the OPC write, and it is possible to improve the accuracy of the reflected light amount acquisition with each laser power.

[0015]

As described above, according to the present invention, in claims 1 and 6, even if the recording amount per power in the OPC write is reduced, the recording boundary can be easily judged during the OPC read. Further, it is possible to improve the accuracy of acquiring the value of the reflected light amount at each laser power. According to the second and seventh aspects, the degree of difficulty in determining the boundary based on the reflected light amount becomes constant, and the accuracy of acquiring the reflected light amount at each laser power can be uniformly increased. Claims 3 and 8 are OPC
The detection of the position where the power is changed during reading becomes more apparent, and the accuracy of acquiring the amount of reflected light at each laser power can be further increased. Claims 4 and 9 are especially CD-
For rewritable optical disc media such as RW,
Recording can be restarted with stable laser light emission even immediately after the unrecorded state is set at the laser power change boundary, and the accuracy of acquiring the reflected light amount at each laser power can be improved. According to claims 5 and 10, the changed position of the recording laser power in the OPC read can be accurately identified regardless of the recording method in the OPC write, and the accuracy of the reflected light amount acquisition at each laser power can be improved. It will be possible.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an optical disc drive device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a control procedure at the time of OPC writing according to the first embodiment of this invention.

FIG. 3 is a diagram showing power fluctuations in a normal OPC light.

FIG. 4 is a diagram showing power fluctuations in the OPC light of the first embodiment of the present invention.

FIG. 5 is a flowchart showing a control procedure at the time of OPC reading according to the first embodiment of this invention.

FIG. 6 is a PC during OPC writing according to the second embodiment of the present invention.
It is a figure showing the relationship between the address in A and laser power.

FIG. 7 is a flowchart showing a control procedure at the time of OPC writing according to the third embodiment of the present invention.

FIG. 8 is a flowchart showing a control procedure at the time of OPC read according to the third embodiment of the present invention.

FIG. 9 is a flowchart showing a control procedure at the time of OPC read according to the fifth embodiment of the present invention.

[Explanation of symbols]

1 optical disk medium, 2 pickup, 3 laser control section, 4 data modulation section, 5 analog signal processing section, 6
A / D converter, 7 system controller, 8 drive motor, 9 data demodulator, 10 servo section

Claims (10)

[Claims] 1. A method for controlling an optical disk for irradiating an information recording medium with a laser beam to record or reproduce information, wherein a recording laser is recorded in a trial writing area on the optical disk to determine an optimum recording laser power of the laser beam. Test writing write means for controlling the power intensities in an alternating order, and the data in the test writing area recorded by the test writing write means is reproduced, and a specified value is set for the reproduction level reproduced immediately before. An optical disc control method comprising: a test writing read unit that identifies the detected position as a changed portion of the recording laser power when different reproduction levels are detected. 2. In order to determine the optimum recording laser power of the laser beam, intensities of the recording laser power are alternately arranged in the test writing area on the optical disc in the order of strength and weakness, and at which laser power boundary. 2. The optical disc control method according to claim 1, further comprising a trial writing write means for controlling so that the difference is even. 3. An optical disk control method for irradiating an information recording medium with laser light to record or reproduce information, wherein a recording laser is recorded in a trial writing area on the optical disk to determine an optimum recording laser power of the laser light. Trial writing write means for controlling so that the recording laser power is temporarily not output at the boundary where the recording laser power is changed, and the trial writing recorded by the trial writing write means. An optical disk control method comprising: a test writing read unit that reproduces data in an area and, when the data is detected as unrecorded, identifies the detected position as a changed portion of the recording laser power. 4. The recording laser power intensity is gradually changed in a trial writing area on the optical disc in order to determine the optimum recording laser power of the laser light, and the recording laser power is temporarily changed at a boundary where the recording laser power is changed. 4. The optical disc control method according to claim 3, further comprising a trial writing write unit that controls the recording laser power to erase light emission. 5. An optical disk control method for irradiating an information recording medium with laser light to record or reproduce information, wherein a recording laser is recorded in a trial writing area on the optical disk to determine an optimum recording laser power of the laser light. When writing the trial writing write means for changing the power intensity stepwise and recording the data of the trial writing area recorded by the trial writing write means, the same recording data as the trial writing write means is generated. An optical disc control method comprising: a test writing read unit that identifies a changed position of the recording laser power by timing the generated amount. 6. An optical disc control apparatus for irradiating an information recording medium with a laser beam to record or reproduce information, wherein a recording laser is provided in a trial writing area on the optical disc for determining an optimum recording laser power of the laser beam. Test writing write means for controlling the power intensities in an alternating order, and the data in the test writing area recorded by the test writing write means is reproduced, and a specified value is set for the reproduction level reproduced immediately before. An optical disk control device comprising: a test writing read unit that identifies the detected position as a changed portion of the recording laser power when the above reproduction level is detected. 7. The intensity of the recording laser power is alternately arranged in a test writing area on the optical disk in order to determine the optimum recording laser power of the laser light, and at which laser power intensity boundary. 7. The optical disk control device according to claim 6, further comprising a trial writing write means for controlling so that the difference is also equal. 8. An optical disc control apparatus for irradiating an information recording medium with a laser beam to record or reproduce information, wherein a recording laser is provided in a trial writing area on the optical disc for determining an optimum recording laser power of the laser beam. Trial writing write means for controlling so that the recording laser power is temporarily not output at the boundary where the recording laser power is changed, and the trial writing recorded by the trial writing write means. An optical disk control device comprising: a trial writing read unit that reproduces the data in the area and, when the data is detected as unrecorded, identifies the detected position as a changed portion of the recording laser power. 9. The recording laser power intensity is gradually changed in a trial writing area on the optical disc to determine the optimum recording laser power of the laser light, and the recording laser power is temporarily changed at a boundary where the recording laser power is changed. 9. The optical disk control device according to claim 8, further comprising a test writing write unit that controls the recording laser power so as to emit erase light. 10. An optical disc control apparatus for irradiating an information recording medium with a laser beam to record or reproduce information, wherein a recording laser is provided in a trial writing area on the optical disc to determine an optimum recording laser power of the laser beam. When writing the trial writing write means for changing the power intensity stepwise and recording the data of the trial writing area recorded by the trial writing write means, the same recording data as the trial writing write means is generated. An optical disk control device comprising: a trial writing read unit that identifies a changed position of the recording laser power by timing the generation amount.