JP3228712B2 - Optical disk system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an optical disk system for reading and writing data on an optical disk.

[0002]

2. Description of the Related Art An optical disk system comprising a host device such as a personal computer and a drive device for reading and writing data from and on an optical disk based on an instruction from the host device is a writable compact disc (Compact Disc Recordable).
e: CD-R), erasable and rewritable compact disc (Compact Disc Rewritab)
le: CD-RW) When data is optically written on an optical disk such as a CD-RW, the recording laser power is optimized (O) to measure the optimum recording power before writing the data.
ptimum Power Calibration:
OPC) must be performed.

For example, in the case of a CD-R or CD-RW, a power calibration area (Power Calibration) for performing OPC on an optical disk in advance.
nArea: PCA) is provided, and OPC is performed using the PCA area.

[0004] By the way, the PCA area on the optical disk is 1
Since there are only 00 times, the number of times of executing the OPC is limited. In particular, when data is written by a packet write method in which one track is divided into a plurality of packets and written, a large number of OPCs are performed.
There is a problem that the region A becomes insufficient in a short time. In addition, since OPC takes time, there is also a problem that access time is delayed.

In order to solve such a problem, conventionally, P
A method has been proposed in which the CA area is divided into three parts, and one of them is used to execute OPC, thereby increasing the number of OPC executions (for example, see Japanese Patent Application Laid-Open No. 7-287847). .

However, in the above-described method, the number of executions of the OPC can be increased more than usual, but the OPC must be executed immediately after the power is turned on or immediately after the optical disk is exchanged. In addition to this, the period in which the PCA area can be used is only slightly increased, and the above-mentioned problems cannot be solved.

Therefore, in order to solve the above-mentioned problems, a unique number (disk ID) is recorded for each optical disk, and the drive device performs OPC on the inserted optical disk, and uses the disk ID and OPC of the optical disk. The obtained optimum recording power is stored in a nonvolatile memory in the apparatus in association with the optimum recording power.

When the disc ID of the inserted optical disc matches the disc ID stored in the nonvolatile memory, the drive device records data based on the optimum recording power stored in correspondence with the disc ID. I do.

Therefore, it is not necessary to perform OPC on the optical disk many times, so that the PCA area can be used for a long time, and the data writing process can be shortened.

However, the capacity of the nonvolatile memory of the drive device is limited, and the optimum recording power of many optical disks cannot be managed. Therefore, there has been a method of managing an optimum recording power for each optical disk by a higher-level device instructing a drive device to read and write data.

In this method, the host device stores the drive device's unique number (drive number), the disk ID of the optical disk, the rotation speed of the optical disk, and the optimum recording power in association with each other, and stores the optical disk inserted in the drive device. If the information such as the disc ID of the disc matches the information such as the disc ID stored in the apparatus, the data is recorded based on the optimum recording power stored corresponding to the disc ID.

[0012]

However, according to the above-mentioned method, when the control software of the drive device is updated and the specification is changed, or when the specification related to the optimum recording power is changed, it is stored in the host device. There is a risk that the optimum recording power obtained will be the wrong recording power, and if such recording power is at an excessive level, there is a problem that the drive device is broken.

The present invention has been made in view of the above points, and writes data with an accurate recording power even if the control software of the connected drive device is changed to a new version and the specification relating to the optimum recording power is changed. The purpose is to be able to.

[0014]

In order to achieve the above object, the present invention comprises a drive device for reading and writing data from and on an optical disk, and a host device for reading and writing data on the optical disk via the drive device. In the optical disk system, the host device acquires the drive device number, the disk ID, the rotation speed, the optimum recording power, and the version of the control software of the drive device when the recording laser power is optimized in the drive device. Holding means for holding them in correspondence with each other, and when the optical disk is inserted into the drive device, the drive number of the drive device and the disk ID of the optical disk are held in the holding device, and the control software of the drive device The version is held in the holding means described above. Means for optimizing the recording laser power for the inserted optical disc when the version of the control software is higher than the version of the control software, and for storing the optimum recording power obtained by the optimization of the recording laser power and the new control software version. It is a thing.

Further, in the optical disk system as described above, when upgrading the control software of the drive device to the higher-level device, a control for invalidating the incompatible optimum recording power held in the holding means. Means may be provided.

Further, in the above optical disk system, compatibility information holding means for holding compatibility information of the optimum recording power in the drive device, and transferring the compatibility information held in the means to the host device. Preferably, the compatibility information transfer means is provided, and the higher-level device is provided with means for determining the validity of the optimum recording power held in the holding means based on the compatibility information transferred from the drive device.

[0017]

[0018]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an optical disk system according to an embodiment of the present invention.

This optical disk system comprises a host device 1 such as a personal computer and a drive device 10 for reading and writing data from / to an optical disk connected to the host device 1. The host device 1 is connected via the drive device 10. The data on the optical disk 20 is read and written.

The host device 1 includes a CPU, a ROM, and an RA.
M and the like, a control unit 2 realized by a microcomputer and an interface (I / F) control unit 3 and the like. The control unit 2 controls the entire apparatus and controls processing according to the present invention. The control unit 3 controls transmission and reception of data to and from the drive device 10.

On the other hand, the drive device 10 includes a CPU 11,
It comprises a ROM 12, a RAM 13, an interface (I / F) control unit 14, a read / write control unit 15, and the like.
Data recording and reproduction with respect to the optical disc 20 are performed based on an instruction from the host device 1 such as a host computer connected to the outside.

The CPU 11 controls the entire operation of the drive device 10 and reads and writes data from and on the optical disk 20 based on control software stored in the ROM 12. In addition, a recording laser power optimization (OPC) process according to the present invention is also performed.

The ROM 12 is a rewritable memory that stores control software executed by the CPU 11 and the like.
The RAM 13 is a memory used as a working memory for the control software of the drive device 10 and also stores compatibility information of the optimum recording power.

The I / F control unit 14 controls the exchange of various data and commands with the host device 1. The read / write control unit 15 controls the writing and reading of data to and from the optical disc 20.

That is, the control unit 2 of the host device 1 executes the drive device number, disk ID, rotation speed,
Holding means for acquiring the optimum recording power and the version of the control software of the drive device 10 and holding them in correspondence with each other, and when the optical disk 20 is inserted into the drive device 10, the drive number of the drive device 10 and the optical disk 20 When the version of the control software of the drive device 10 is newer than the version of the control software stored in the holding unit, the recording laser power for the inserted optical disk 20 is optimized. And performs a function of storing the optimum recording power obtained by the recording laser power optimization and the new control software version.

When the control software of the drive unit 10 is upgraded, the control unit 2 of the host device 1 disables the incompatible optimum recording power stored in the storage unit. Also fulfills.

Further, the CPU 1 of the drive device 10
1 and the RAM 13 function as compatibility information holding means for holding compatibility information of the optimum recording power, and the CPU 11 and the I / F control unit 14 of the drive device 10 It functions as a compatibility information transfer unit for transferring the compatibility information to the host device 1.

The control unit 2 of the host device 1 has a function of determining the validity of the optimum recording power held in the holding unit based on the compatibility information transferred from the drive device 10.

[0029]

[0030]

(1) Control processing according to claim 1 of the present invention FIG. 2 is a flowchart showing control processing according to claim 1 of the present invention in the optical disk system shown in FIG.

The control unit 2 of the host device 1
When the recording laser power optimization (OPC) is performed at 0, the drive unit number, the disk ID, the optimum recording power corresponding to the rotation speed of the optical disk 20, and the ROM 12 of the drive unit 10 are stored via the I / F control unit 3. The version of the control software obtained
Store in AM.

Then, when writing to the optical disk 20 is executed, that is, when there is a write instruction, the control unit 2 of the host device 1 executes step (indicated by “S” in the figure) 1
To check the drive unit number, the disk ID, the optimum recording power corresponding to the rotation speed of the optical disk 20 and the version of the control software of the ROM 12 held in the RAM in the control unit 2, and proceed to step 2 to proceed to step 2 It is determined whether or not the disk ID of the optical disk 20 is held in the RAM in the control unit 2 and the optimum recording power corresponding to the rotation speed at the time of writing corresponding to the disk ID is held.

If it is determined in step 2 that the optimum recording power corresponding to the rotation speed at the time of writing to the RAM in the control unit 2 is held, the flow advances to step 5 to instruct the drive device 10 to perform the optimum recording. The data is written to the optical disk 20 with the power, and the process ends.

If it is determined in step 2 that the optimum recording power corresponding to the rotation speed at the time of writing is not held, or the version held in the RAM in the control unit 2 and the version of the control software in the ROM 12 do not match. If
Proceeding to step 3, instruct the drive device 10 to perform OPC on the optical disk 20.

Proceeding to step 4, the optimum recording power, drive unit number, disk ID, and control software version measured by the OPC are acquired and stored in the RAM in the control unit 2, and then stored in step 5. Then, it instructs the drive device 10 to execute data writing to the optical disk 20 with the optimum recording power,
This processing ends.

In this way, when the control software of the drive device 10 is changed to a new version and the specification is changed, the host device 1 does not use the optimum recording power measured by the old version of the control software, but re-uses it. Since the optimum recording power obtained by executing the OPC is used, data can be written with an accurate recording power even if the specification regarding the optimum recording power changes.

(2) Control processing according to claim 2 of the present invention In the optical disk system, every time the version of the control software of the drive device is updated, the OPC must be performed regardless of whether the previously obtained optimum recording power can be used. If it must be executed, the PCA area cannot be effectively used, and the processing time at the time of writing data is delayed. Therefore, in the control processing according to claim 2 of the present invention,
This is to solve the above-mentioned problems.

FIG. 3 is a flowchart showing a control process according to a second aspect of the present invention in the optical disk system shown in FIG.

The control unit 2 of the host device 1
When the version of the control software is updated, the control software in the ROM 12 of the drive device 10 is rewritten and upgraded in step (indicated by "S" in the figure) 11, and the process proceeds to step 12 to update the version of the rewritten control software. Then, the compatibility with the version of the control software when the optimum recording power held in the RAM in the control unit 2 is measured is checked.

Then, the process proceeds to a step S13, where the optimum recording power incompatible with the rewritten version of the control software stored in the RAM of the control unit 2 is invalidated based on the check result, and thereafter the optimum recording power is set. This processing is ended without using the power.

In this way, when the control software of the drive device 10 is upgraded, the host device 1 measures the old version stored in its own device and measures the optimum recording that is incompatible with the new version. Since only the power is invalidated, there is no need to execute OPC every time the control software is upgraded.
Space can be saved.

(3) Control processing according to claim 3 of the present invention FIG. 4 is a flowchart showing the control processing according to claim 3 of the present invention in the optical disk system shown in FIG.

The control section 2 of the host device 1
Step 2 (indicated by “S” in the figure) at the time of execution of writing to
In step 1, the drive unit number and the disk ID held in the RAM in the control unit 2 are checked, and the process proceeds to step 22, where the drive unit number and the disk ID held in the RAM in the control unit 2 are connected. It is determined whether or not the drive device number of the drive device 10 and the disk ID of the optical disk 20 inserted in the drive device 10 match.

If it is determined in step 22 that the drive unit number and the disk ID respectively match, the process proceeds to step 23, where the version of the control software stored in the RAM in the control unit 2 is checked. The version of the control software stored in the RAM in the unit 2 and the RO of the connected drive device 10
It is determined whether the version of the control software stored in M12 matches.

When the versions of the control software coincide with each other in the judgment of step 24, the operation proceeds to step 27, where the drive unit 10 stored in the RAM of the control unit 2 and the optimum recording power corresponding to the disk ID are used for the drive unit 10.
To write data, and this processing ends.

If the versions of the control software do not match in the determination of step 24, the flow advances to step 25 to obtain compatibility information of the optimum recording power from the drive device 10. That is, from the drive device 10 to the ROM
The past version information compatible with the optimum recording power of the current control software version is transferred and acquired. This compatibility information is, for example, the drive device 10
Is preferably stored in the RAM 13.

Proceeding to step 26, whether the control software when the optimum recording power held in the RAM in the control unit 2 is measured based on the compatibility information acquired from the drive device 10 is compatible with the current control software. It is determined whether or not there is compatibility, and if there is compatibility, it is determined that the optimum recording power is valid, and the process proceeds to step 27, where the optimum recording power corresponding to the drive device number and the disk ID stored in the RAM in the control unit 2, that is, Then, the drive device 10 is caused to execute the data writing with the optimum recording power measured by the previous and old version of the control software, and the process is terminated.

When it is determined in step 22 that the drive unit number and the disk ID do not match each other, that is, the drive unit number and the disk ID held in the RAM in the control unit 2 are replaced by the connected drive unit 10.
If the drive number does not correspond to the disc ID of the optical disc 20 inserted in the drive 10 and the optimum recording power held in the RAM in the control unit 2 in the judgment of step 26, the current control software When it is determined that there is no compatibility with the current control software, that is, when it is determined that the version of the control software when measuring the optimum recording power held in the RAM in the control unit 2 is not compatible with the current control software, Proceed to step 28.

In step 28, the drive device 10 causes the drive device 10 to execute OPC on the optical disk 20, and in step 29, obtains the optimum recording power, drive device number, disk ID, and control software version measured by the OPC. Is stored and held in the RAM of the control unit 2, and the process proceeds to step 27, where the drive unit number and the disk I stored in the RAM of the control unit 2 are stored.
The drive device 10 writes data at the optimum recording power corresponding to D, that is, the optimum recording power measured by the current version of the control software, and the process ends.

As described above, by maintaining the compatibility information between the version of the control software and the optimum recording power in the drive device 10, the host device 1 can update the version of the control software of the drive device 10 In the current version, if the optimum recording power measured in the previous version can be used without any problem, use it as it is, and if the optimum recording power measured in the previous version is not available in the current control software version, Since the optimum recording power is obtained by newly executing OPC, it is not necessary to execute OPC simply by changing the version of the control software, and the PCA area can be saved.

[0052]

[0053]

[0054]

[0055]

[0056]

[0057]

[0058]

[0059]

[0060]

[0061]

[0062]

[0063]

As described above, according to the optical disk system of the present invention, even if the control software of the connected drive device is changed to a new version and the specification relating to the optimum recording power is changed, the accurate recording power can be obtained. Can be used to write data.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an optical disk system according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a control process according to claim 1 of the present invention in the optical disc system shown in FIG.

FIG. 3 is a flowchart showing a control process according to a second aspect of the present invention in the optical disk system shown in FIG. 1;

FIG. 4 is a flowchart showing a control process according to claim 3 of the present invention in the optical disk system shown in FIG. 1;

[Explanation of symbols]

 1: host device 2: control unit 3: I / F control unit 10: drive device 11: CPU 12: ROM 13: RAM 14: I / F control unit 15: read / write control unit 20: optical disk

Claims (3)

(57) [Claims] 1. An optical disk system comprising: a drive device for reading / writing data from / on an optical disk; and a higher-level device for reading / writing data on / from the optical disk via the drive device. Holding means for acquiring a drive device number, a disk ID, a rotational speed, an optimum recording power, and a version of control software of the drive device when executing power optimization, and holding them in correspondence with each other; When the optical disk is inserted, the drive number of the drive device and the disk ID of the optical disk are held in the holding unit, and the version of the control software of the drive device is the version of the control software held in the holding unit. Newer than Means for executing recording laser power optimization for the inserted optical disc, and for storing an optimum recording power obtained by the recording laser power optimization and a new control software version. . 2. The optical disc system according to claim 1, wherein when the control software of the drive device is upgraded to the host device, the incompatible optimum recording power held in the holding unit is invalidated. An optical disk system comprising control means. 3. The optical disk system according to claim 1, wherein said drive device has compatibility information holding means for holding compatibility information of an optimum recording power, and said compatibility information held by said means is sent to said host device. And a means for determining the validity of the optimum recording power held in the holding means based on the compatibility information transferred from the drive device. An optical disc system characterized by the following.