JP3233587B2 - Information recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording apparatus such as a CD-R drive for recording data on an optical disk.

[0002]

2. Description of the Related Art Conventionally, an information recording apparatus such as a CD-R drive apparatus uses an optical disc for recording data tracks in a user data area called a program area (PROGRAM AREA) on an optical disc which is an optical information recording medium. The power calibration processing (O) is performed using the test area referenced by the count area of the power calibration area (PCA area) of FIG.
PC processing) to determine the optimum recording laser power (see, for example, JP-A-7-85494).

[0003] That is, the PCA area is composed of a plurality of count areas and a plurality of test areas referred to by the respective count areas.
At the time of PC, a search is performed from the head of the count area of the PCA area and reproduced, and based on the address of the count area where the reproduced signal (RF signal) is obtained, the OPC performed so far is performed.
The number of times of processing (number of times power calibration is executed) is determined.

After that, the address of the next count area to be written is determined based on the number of power calibration executions, the test area corresponding to the address is searched, predetermined data is recorded, and based on the reproduction signal of the data. The optimum recording laser power during data recording.

After data is recorded in the test area, predetermined data is recorded in a count area which refers to the test area, and the number of times of execution of the OPC process is recorded.
The PC processing ends.

[0006]

However, in the conventional information recording apparatus, when the count area is reproduced at the time of OPC, the count area cannot be reproduced correctly due to a defect or adhesion of dust on the optical disk. Will be misrecognized. Then, it becomes impossible to correctly search the test area to be used for the OPC processing from now on depending on the count area, and the OPC processing is performed using the test area which has already been used, and an inappropriate recording laser power is set. There was a problem. If data is recorded on an optical disk using an inappropriate recording laser power, the data may not be reproduced, and the reliability of data recording is lost.

The present invention has been made in view of the above points, and has been made in consideration of an OPC obtained from a count area during OPC processing.
It is an object to verify whether a test area based on the number of times of PC execution is correct.

[0008]

In order to achieve the above object, the present invention determines an optimum recording laser power at the time of data recording by using a test area referenced by a count area of a power calibration area of an optical disk. In an information recording apparatus comprising a power calibration unit and a unit for recording data on the optical disk by using the laser power determined by the unit, when the recording laser power is determined by the power calibration unit, the power calibration area is A plurality of count areas are reproduced, the number of power calibration executions is obtained based on the address of the count area from which the reproduced signal is obtained, and the power calibration execution in a plurality of test areas of the power calibration area is performed. And reproducing the test area corresponding to the number of times, it is provided with a power calibration execution frequency verification means for verifying whether the power calibration execution count is correct depending on whether the resulting reproduction signal.

Further, power calibration means for determining an optimum recording laser power at the time of data recording using a test area referred to by a count area of a power calibration area of the optical disk, and the above-mentioned laser power determined by the means. In an information recording apparatus having means for recording data on an optical disc, when the recording laser power is determined by the power calibration means, a plurality of count areas of the power calibration area are reproduced, and a count obtained by obtaining a reproduced signal is obtained. A power calibration execution number is obtained based on an address of the area, and a test area corresponding to the power calibration execution number in a plurality of test areas of the power calibration area is reproduced, and a reproduction signal is reproduced. If it is obtained, the data is reproduced from the test area in ascending order. If the reproduced signal is not obtained, the data is reproduced from the test area in descending order. May be provided.

Further, when the number of power calibration executions obtained by reproducing the count area is larger than the number of power calibration executions obtained by reproducing the test area, the power calibration execution obtained by reproducing the count area is performed. Means for recording predetermined data up to the test area corresponding to the number of times may be provided.

When the number of power calibrations obtained by reproducing the count area is smaller than the number of power calibrations performed by reproducing the test area, the power calibration execution obtained by reproducing the test area is performed. Means for recording predetermined data in a count area corresponding to the number of times may be provided.

Further, after the determination of the recording laser power, it is confirmed whether or not the number of power calibration executions obtained by reproducing the count area and the test area of the power calibration area is increased by one from the previous time. It is preferable to provide a means for performing this.

Further, a power calibration means for determining an optimum laser power at the time of data recording by using a test area referred to by a count area of a power calibration area of the optical disk, and the optical disk based on the laser power determined by the means. An information recording apparatus comprising means for recording data in
When the laser power is determined by the power calibration means, a plurality of test areas in the power calibration area are reproduced in order from the start address, and the number of power calibration executions is performed based on the address of the test area from which the reproduced signal was obtained. Is preferably provided.

According to the information recording apparatus of the present invention, a plurality of count areas in the power calibration area are reproduced and reproduced during a power calibration process for determining an optimum recording laser power when recording data on an optical disk. The number of power calibration executions is obtained based on the address of the count area from which the signal was obtained, and a test area corresponding to the number of power calibration executions in a plurality of test areas of the power calibration area is reproduced to obtain a reproduced signal. Since it is verified whether or not the power calibration execution number is correct depending on whether or not, it is possible to verify whether or not the power calibration execution number obtained from the count area before the start of the power calibration processing is correct, Data is stored in the used test area. It is possible to avoid that the result set incorrectly double write to the recording laser power.

Further, a plurality of count areas in the power calibration area are reproduced, and the number of power calibration executions is obtained based on the address of the count area from which the reproduced signal is obtained. The test area corresponding to the number of power calibration executions is reproduced. If a reproduction signal is obtained, reproduction is performed in ascending order from the test area. If a reproduction signal is not obtained, reproduction is performed in descending order from the test area. If the number of power calibration executions is determined based on the address of the test area where the signal is obtained, the power calibration processing can be performed using the test area obtained based on the accurate number of power calibration executions. In the used test area It is possible to avoid that would set the over data incorrectly double write to the recording laser power.

Further, when the number of power calibration executions obtained by reproducing the count area is larger than the number of power calibration executions obtained by reproducing the test area, the power calibration execution number corresponding to the reproduction of the count area is corresponded. By recording predetermined data up to the test area
It is possible to solve a problem that the number of times of power calibration is erroneously recognized after the execution of the power calibration process.

When the number of power calibration executions obtained by reproducing the count area is smaller than the number of power calibration executions obtained by reproducing the test area, the number of executions of the power calibration corresponds to the number of executions of the power calibration obtained by reproducing the test area. If the predetermined data is recorded in the count area to be used, it is possible to prevent the power calibration process from being performed by the used test area in other information recording devices, and to set the correct recording laser power. it can.

Further, after determining the recording laser power,
By checking whether or not the number of power calibration executions obtained by reproducing the count area and the test area of the power calibration area has increased by one from the previous time, the recording laser power can be reduced by the power calibration processing. It is possible to verify whether the settings are correct.

Further, at the time of power calibration processing for determining the optimum recording laser power at the time of recording data on the optical disk, a plurality of test areas in the power calibration area are reproduced in order from the top address, and a reproduced signal is obtained. If the number of executions of the power calibration is obtained based on the address of the test area, the test area to be used for the power calibration processing can be determined by simple processing.

[0020]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a diagram showing a configuration of an information recording apparatus according to an embodiment of the present invention. This information recording device is a CD-R with a built-in microcomputer.
An optical disk device such as a drive device.

This information recording apparatus includes a user microcontroller (CPU) 1, a flash ROM 2, a host interface (I / F) controller 3, a buffer manager 4, a DRAM 5, a subcode operation controller 6, a CD-ROM encoder 7, and a CD-ROM encoder. ROM
Decoder 8, audio unit 9, system controller 1
0, CD encoder 11, CD decoder 12, servo 1
3 and a spindle motor controller 14 and the like.

The CPU 1 is a central processing LSI for controlling the operation of the entire information recording apparatus. Flash RO
M2 is a work area used when the CPU 1 executes various processes, and is a non-volatile memory in which data can be rewritten and erased. The host I / F controller 3 is an LS that controls data communication with the host computer 15.
I. The buffer manager 4 controls the reception of data transferred from the host computer 15 and
6 is an LSI that controls transmission of data read from the host computer 6 to the host computer 15.

The DRAM 5 is a buffer memory for temporarily storing data transferred from the host computer 15 and data read from the optical disk 16. The subcode operation controller 6 controls the optical disc 1
6 and the subcodes (SubP, Q, R, S,...,.
This is an LSI that performs a process of separating W).

The CD-ROM encoder 7 has a CD-RO
LS for modulating M data before writing to optical disc 16
I. The CD-ROM decoder 8 reads the read CD.
-An LSI for demodulating ROM data. The audio unit 9 reproduces audio data such as music and outputs the audio.

The system controller 10 performs a power calibration process (OPC:
OPTIMUM POWER CARRIBRATIO
N) An LSI that controls recording and reproduction of data. C
The D encoder 11 is an LSI that modulates user data and subcodes based on the media standard of the optical disc 16 before writing the data on the optical disc 16.

The CD decoder 12 is an LSI for demodulating data read from the optical disk 16 into user data and subcodes. Servo 13 is the optical disk 1
6 is an LSI for controlling servo such as focus and tracking at the time of recording and reproducing data with respect to No. 6. The spindle motor controller 14 is an LSI that controls the rotation of a spindle motor (omitted in the drawing) that rotates the optical disk 16.

That is, the system controller 10
And the like, a power calibration means for determining an optimum recording laser power at the time of data recording by using a test area referred to by a count area of a power calibration area of the optical disk 16, and a laser power determined by the means. It functions as a means for recording data in the memory.

When the recording laser power is determined by the power calibration means, a plurality of count areas of the power calibration area are reproduced, and the number of power calibration executions is determined based on the address of the count area from which the reproduced signal is obtained. And reproduces the test area corresponding to the number of power calibration executions among the plurality of test areas in the power calibration area, and verifies whether the number of power calibration executions is correct based on whether or not a reproduced signal is obtained. Also functions as power calibration execution number verification means.

Further, when the recording laser power is determined by the power calibration means, a plurality of count areas in the power calibration area are reproduced, and the number of power calibration executions is determined based on the address of the count area from which the reproduced signal was obtained. And reproducing the test area corresponding to the number of power calibration executions among the plurality of test areas in the power calibration area. When a reproduction signal is obtained, reproduction is performed in ascending order from the test area to obtain a reproduction signal. If not, the reproduction is performed in descending order from the test area, and the function of the power calibration execution number determining means for determining the power calibration execution number based on the address of the test area from which the reproduction signal is obtained is also performed.

Further, when the number of power calibration executions obtained by reproducing the count area is larger than the number of power calibration executions obtained by reproducing the test area, the number of executions corresponds to the number of power calibration executions obtained by reproducing the count area. It also functions as means for recording predetermined data up to the test area to be tested.

Further, when the number of power calibration executions obtained by reproducing the count area is smaller than the number of power calibration executions obtained by reproducing the test area, the power calibration execution number obtained by reproducing the test area is corresponded. It also functions as means for recording predetermined data in the count area to be processed.

In addition, after determining the recording laser power, a means for confirming whether or not the number of power calibration executions obtained by reproducing the count area and the test area of the power calibration area is increased by one from the previous time. Performs functions.

Further, when the laser power is determined by the power calibration means, a plurality of test areas in the power calibration area are reproduced in order from the beginning, and the power calibration is performed based on the address of the test area from which the reproduced signal was obtained. It also functions as a means for determining the number of executions of the application.

FIG. 2 is a diagram showing the format of the recording surface of the optical disk 16. The recording surface of the optical disk 16 has a power calibration area (PCA area) 20, a program memory area (PMA area) 2
1, a lead-in area 22, a program area 23, and a lead-out area 24.

FIG. 3 is a diagram showing an example of a format in the PCA area 20 shown in FIG. The PCA area 20
It is divided into a count area and a test area. The test area is divided into, for example, 100 test areas (partitions), and one test area is used for each power calibration process. The count area is divided into 100 count areas (referred to as partitions) respectively corresponding to the test areas, and when the test area is used, predetermined data is recorded in the corresponding count area to indicate that the test area has been used. I do.

Next, a description will be given of processing relating to verification and determination of the number of times power calibration has been performed in the power calibration processing of the information recording apparatus. FIG. 4 is a flowchart showing the processing. In the process of verifying and determining the number of times power calibration has been performed, in step (indicated by “S” in the figure) 1, seeking and reproducing are performed in order from the start address of the count area. It is determined whether or not it has been obtained. If it has been obtained, the process proceeds to step 3 to obtain the number N of power calibration executions (the number of OPC executions) based on the address of the count area from which the RF signal has been obtained, and then proceeds to step 4. .

In step 4, the test area N corresponding to the number of OPC executions N is reproduced, and the flow advances to step 5 to determine whether or not the RF signal has been obtained. The area N + 1 is reproduced, and the process proceeds to step 7 to determine whether an RF signal has been obtained.

If no RF signal is obtained in the judgment of step 7, the process proceeds to step 11 and the N set in step 6 is set.
Is determined as the number of OPC executions.

When the RF signal is obtained in the determination of step 7, the process proceeds to step 8 to further increment the address of the test area by one, proceeds to step 9 to reproduce the test area N = N + 1, and proceeds to step 10. It is determined whether or not the RF signal is obtained. If the RF signal is obtained, the process returns to step 8, and the processing of steps 8 to 10 is repeated until a test area in which the RF signal is not obtained is obtained. ,... Are sequentially reproduced.

If no RF signal is obtained in the determination in step 10, the process proceeds to step 11, and a value N-1 decremented by 1 from N set in step 8 is determined as the number of OPC executions. That is, when the test area where the RF signal is not obtained and the obtained test area are adjacent to each other in steps 8 to 10, the OPC execution number is determined based on the address of the test area where the RF signal is obtained. I do.

On the other hand, the test area N
If the RF signal cannot be obtained from step (1), the process proceeds to step S12 to reproduce the test area N-1, and the process proceeds to step S13 to determine whether the RF signal has been obtained. If the RF signal is obtained in the determination of step 13, the process proceeds to step 17, and the value N set in step 12 is determined as the number of OPC executions.

If no RF signal is obtained in step 13, the process proceeds to step 14 where the address of the test area is further decremented by one, and the process proceeds to step 15 to reproduce the test area N. It is determined whether or not a signal has been obtained. If the RF signal has not been obtained, the process returns to step 14, and the processing of steps 14 to 16 is repeated until a test area in which the RF signal has been obtained is obtained.
The test areas N-2, N-3,... Are sequentially reproduced. If the RF signal is obtained in the determination of step 16, step 1
Proceeding to 7, the value N set in step 14 is determined as the number of OPC executions.

This processing will be further described. First,
Sectors (for example, in units of 15 sectors) are sequentially reproduced from the head of the count area, and when an RF signal is obtained from the area of address 30, it is obtained as the number of times of OPC execution, that is, as an address of a test area for executing power calibration.

Then, it is determined whether an RF signal is obtained by reproducing the area of the test area at the address 30.
If obtained, the area at address 31 is reproduced to determine whether an RF signal has been obtained. Here, if no RF signal is obtained, the number of OPC executions is determined to be 30, and the address 30 of the test area where the power calibration is executed is performed.
To win.

When the RF signal is obtained from the address area 31 of the test area, the addresses 32, 33, 3
.. Are sequentially reproduced to find an area where an RF signal cannot be obtained. Then, for example, the address 3 of the test area
If the RF signal cannot be obtained in step 4, the number of OPC executions is 33
Is determined, and the address 33 of the test area for executing the power calibration is obtained.

On the other hand, if the RF signal cannot be obtained from the address area 30 of the test area, the area at the address 29 is reproduced to determine whether the RF signal has been obtained.
Once obtained, the number of OPC executions is determined to be 29, and the address 2 of the test area where the power calibration is executed
Get 9

If the RF signal cannot be obtained from the address 29 of the test area, the address 28, 2
.. Are sequentially reproduced to determine an area where an RF signal is obtained. Then, for example, the address 2 of the test area
When the RF signal is obtained in step 6, the number of OPC executions is determined to be 26, and the address 26 of the test area for executing the power calibration is obtained.

As described above, at the time of the power calibration processing at the time of recording data on the optical disk, the test area obtained from the plurality of count areas of the power calibration area is the unwritten area to be used next to the area used last time. It is possible to verify whether or not it is an area, and it is possible to obtain the correct area based on the verification,
It is possible to avoid double writing of data in the used test area and erroneous setting of the recording laser power.

Next, when the number of OPC executions Xn obtained from the count area does not match the number of OPC executions Yn obtained from the test area due to dust or defects attached in the count area, and Xn> Yn There is. When the OPC process is performed on such an optical disc, an unused area remains while data is recorded in the test area corresponding to the OPC execution count Xn obtained from the count area, and the next OPC execution count is erroneously recognized. Resulting in.

Therefore, this information recording apparatus is designed such that when the number of power calibration executions Xn obtained by reproducing the count area is larger than the number of power calibration executions Yn obtained by reproducing the test area,
Predetermined data is recorded up to a test area corresponding to the number of times power calibration has been performed obtained by reproducing the count area, and a process of filling the difference area is performed.

FIG. 5 shows the OPC obtained from the count area.
FIG. 14 is an explanatory diagram of processing when the number of executions is greater than the number of OPC executions obtained from a test area. As shown in FIG. 5A, for example, when a reproduction signal is obtained at addresses 1 to 7 due to the attachment of a defect or dust (represented by a hatched frame in the figure) when reproducing the count area, , The number of OPC executions Xn = 7 is obtained.

However, as shown in FIG. 5B, for example, when the addresses 1 to 4 of the test area are actually used areas, the number of OPC execution times Yn = 4 obtained from the test area is obtained. And there are areas (indicated by broken lines in the drawing) of addresses 5 to 7 which are difference areas between the area of the address indicated by Xn and the actually used area, and Xn> Yn. .

Therefore, after obtaining the number of OPC executions, FIG.
As shown in FIG. 5C, the count area is left as it is, and as shown in FIG. 5D, the addresses 5 to 8 of the test area, which is the area of the difference between the OPC execution number Xn and the OPC execution number Yn, A predetermined RF signal is recorded in an area (indicated by a hatched frame in the figure). In this way, it is possible to solve a problem in which the number of times of power calibration is erroneously recognized after the execution of the power calibration process.

Next, due to a write error in the count area or the like, the number of OPC executions Xn obtained from the count area may not match the number of OPC executions Yn obtained from the test area, and Xn <Yn. If the OPC process is performed using such an optical disc in another information recording device, double writing occurs in the test area, and it becomes impossible to set a correct recording laser power.

In this information recording apparatus, when the power calibration execution number Xn obtained by reproducing the count area is smaller than the power calibration execution number Yn obtained by reproducing the test area, the information recording apparatus obtains the power calibration execution number Yn. The predetermined data is recorded in the count area corresponding to the power calibration execution number Yn.

FIG. 6 shows the OPC obtained from the count area.
FIG. 9 is an explanatory diagram of processing when the number of executions is smaller than the number of OPC executions obtained from a test area. As shown in FIG. 6A, for example, when there is a writing error or the like in the count area and a reproduction signal is obtained from addresses 1 to 4 when the count area is reproduced (shown by a hatched frame in the figure) From this count area, the number of OPC executions Xn = 4 is obtained.

However, as shown in FIG. 6B, for example, when addresses 1 to 7 of the test area are actually used areas, the number of OPC execution times Yn = 7 obtained from the test area is obtained. In this case, there are areas (indicated by broken lines in the drawing) of addresses 5 to 7 of the count area, which is a difference area between the area of the address indicated by Yn and the area actually used, and Xn < Yn.

Therefore, after obtaining the number of OPC executions, FIG.
As shown in (c) of FIG. 6, a predetermined RF signal is recorded in the area of the address 7 of the count area corresponding to the address 7 of the used area of the test area (indicated by the hatched frame in FIG. 6). As shown in (d), the test area is left as it is.

In this way, it is possible to prevent the power calibration processing from being performed by the used test area in another information recording apparatus, and to set a correct recording laser power.

Next, it is necessary to verify the number of executions of the power calibration after executing the OPC process. After determining the recording laser power by the OPC process, the information processing apparatus checks whether or not the number of power calibration executions obtained by reproducing the count area and the test area of the power calibration area is increased by one from the previous time. I do.

FIG. 7 is a flowchart showing the verification of the number of OPC executions after the end of the OPC processing. In this process, a count (OPC execution number) A is obtained before execution of the OPC process in step (indicated by “S” in the figure) 21, the process proceeds to step 22 to execute the OPC process, and the process proceeds to step 23 to perform the OPC process. Count after processing (OPC execution count)
Acquire B.

Thereafter, the process proceeds to step 24, where the number of times of execution of the OPC after the execution of the OPC process B = the OPC before the execution of the OPC process.
It is determined whether the number of executions is A + 1 or not, and when the number of executions of OPC B after the execution of the OPC process is larger than the number of executions A of OPC before the execution of the OPC process by “1”, the process is determined to be correct and the process is terminated. If it is not “1”, step 25
Proceeds to to set an error flag, and ends this processing. Then, when the error flag is set, an abnormal warning is notified to the user.

In this way, it is possible to verify whether the recording laser power is set correctly by the power calibration process.

Next, a process for determining the correct number of OPC executions (test area used when performing the OPC process) in the test area of the optical disc in this information recording apparatus will be described.

This information recording apparatus reproduces a plurality of test areas in the power calibration area in order from the start address during the power calibration processing of the optical disk, and performs the power calibration based on the address of the test area from which the reproduced signal is obtained. Find the number of executions

FIG. 8 is an explanatory diagram showing a process for directly obtaining the number of OPC executions from the test area on the optical disk. In the above processing, as shown in FIG. 8A, after the reproduction of the area at the address N of the test area (as indicated by the arrow in the figure), the area at the address N + 1 is sought (as indicated by the arrow in the figure), and the reproduction of the area (as indicated by the arrow in the figure) After seeking the area at the address N + 2 (as indicated by the arrow in the figure), the reproduction of the area (as indicated by the arrow in the figure) is followed by seeking at the address N + 3 (as indicated by the arrow in the figure), and reproducing the area (as indicated by the arrow in the figure). It takes a long time to process.

Therefore, without checking the count area, as shown in FIG. 8B, reproduction was performed in descending order (as indicated by the arrow in the figure) from the area of the start address 100 of the test area, and whether the RF signal was obtained. Check whether or not. And R
The number of OPC executions is determined from the address of the area where the F signal is detected, and the test area at that address is used for OPC processing.

In this way, the correct test area to be used in the power calibration process can be determined by a simple process without regenerating the count area and omitting the verification of the number of OPC executions.

[0069]

As described above, according to the information recording apparatus of the present invention, it is possible to verify whether or not the test area based on the number of OPC executions obtained from the count area during the OPC processing is correct. Performing the power calibration using the used test area can be avoided.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an information recording device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a format of a recording surface of an optical disc 16 shown in FIG.

FIG. 3 is a diagram showing an example of a format in a PCA area 20 shown in FIG.

FIG. 4 is a flowchart showing a process of verifying and determining the number of times power calibration has been performed in the power calibration process of the information recording apparatus shown in FIG. 1;

FIG. 5 is an explanatory diagram of processing when the number of OPC executions obtained from a count area in the information recording apparatus shown in FIG. 1 is larger than the number of OPC executions obtained from a test area;

FIG. 6 is an explanatory diagram of processing when the number of OPC executions obtained from a count area in the information recording apparatus shown in FIG. 1 is smaller than the number of OPC executions obtained from a test area;

FIG. 7 is a flowchart showing verification of the number of OPC executions after the end of the OPC processing in the information recording apparatus shown in FIG. 1;

FIG. 8 is an explanatory diagram showing a process when obtaining the number of OPC executions directly from a test area on an optical disc in the information recording apparatus shown in FIG. 1;

[Explanation of symbols]

 1: User microcontroller (CPU) 2: Flash ROM 3: Host interface (I / F) controller 4: Buffer manager 5: DRAM 6: Subcode operation controller 7: CD-ROM encoder 8: CD-ROM decoder 9: Audio Unit 10: System controller 11: CD encoder 12: CD decoder 13: Servo 14: Spindle motor controller 20: PCA area 21: PMA area

──────────────────────────────────────────────────続 き Continued on the front page (72) Shinichi Kurobe 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Company, Ltd. (72) Tatsuya Daimaru 1-3-6 Nakamagome, Ota-ku, Tokyo No. Ricoh Co., Ltd. (72) Inventor Hirokuni Hashimoto 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Co., Ltd. (56) References JP-A-7-235148 (JP, A) JP-A-5 −144004 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G11B ^7/ 12-7/22 G11B ^7/ 00-7/013

Claims (6)

(57) [Claims] 1. A power calibration means for determining an optimum recording laser power at the time of data recording using a test area referred to by a count area of a power calibration area of an optical disc, and said laser power determined by said means. An information recording apparatus comprising means for recording data on an optical disc, wherein when the recording laser power is determined by the power calibration means, a plurality of count areas of the power calibration area are reproduced to obtain a reproduced signal. A power calibration execution number is obtained based on the address of the count area, and a test area corresponding to the power calibration execution number in a plurality of test areas of the power calibration area is reproduced to obtain a reproduction signal. Information recording apparatus characterized in that a power calibration execution frequency verification means for verifying whether the power calibration execution count is correct depending on whether or not. 2. A power calibration means for determining an optimum recording laser power at the time of data recording using a test area referred to by a count area of a power calibration area of an optical disc, and said laser power determined by said means. An information recording apparatus comprising means for recording data on an optical disc, wherein when the recording laser power is determined by the power calibration means, a plurality of count areas of the power calibration area are reproduced to obtain a reproduced signal. A power calibration execution number is obtained based on the address of the count area, and a test area corresponding to the power calibration execution number in a plurality of test areas of the power calibration area is reproduced to obtain a reproduction signal. When the reproduction signal is not obtained, the reproduction is performed in ascending order from the test area. When the reproduction signal is not obtained, the reproduction is performed from the test area in descending order. An information recording apparatus comprising a power calibration execution number determining means for determining. 3. The information recording apparatus according to claim 1, wherein the number of power calibration executions obtained by reproducing the count area is larger than the number of power calibration executions obtained by reproducing the test area. An information recording apparatus comprising: means for recording predetermined data up to a test area corresponding to the number of power calibration executions determined by reproducing the count area. 4. The information recording apparatus according to claim 1, wherein the number of power calibration executions obtained by reproducing the count area is less than the number of power calibration executions obtained by reproducing the test area. An information recording apparatus comprising: means for recording predetermined data in a count area corresponding to the number of power calibration executions determined by reproducing the test area. 5. The information recording apparatus according to claim 1, wherein after determining the recording laser power, a power obtained by reproducing a count area and a test area of the power calibration area. An information recording apparatus, comprising: means for checking whether or not the number of times of calibration has been performed has been increased by one from the previous time. 6. A power calibration means for determining an optimum laser power at the time of data recording using a test area referred to by a count area of a power calibration area of the optical disk, and the optical disk based on the laser power determined by the means. Means for recording data in the information recording apparatus, when the laser power is determined by the power calibration means, a plurality of test areas of the power calibration area are reproduced in order from the top address, the reproduction signal An information recording apparatus, comprising: means for calculating the number of power calibration executions based on the obtained test area address.