JP2002056536A - Optical disk and optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk and an optical disk device capable of reducing the time required till data become recordable from the time the disk is loaded into a drive. SOLUTION: An inner disk identification zone as the managing area exists on a read-in area of a DVD+RW, and such an arrangement is adopted for this zone that a discriminator for the drive and also the number of OPC test accumulative times, temperature T of the device inside, laser current IOP, jitter value J, focus bias value FB, peak laser output value Pp, erase laser output value Pb1, etc., which are the condition for recording the data by this drive, are recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a DVD + R
The present invention relates to an optical disk capable of rewriting data such as W and an optical disk device for recording and reproducing such an optical disk.

[0002]

2. Description of the Related Art An optical disk called a DVD (Digital Versatile Disc) has been developed and used as an optical disk recording medium suitable for a multi-disk application. This DVD can be used in a wide range of fields such as video data, audio data, and computer data. Although a DVD is a disk (diameter 12 cm) of the same size as a CD, the recording capacity has been significantly increased due to a reduction in the pitch of recording tracks and a data compression technique. And recently, DVD-RAM and DV
Data rewritable optical disks called D + RW have emerged.

[0003] In particular, when data is recorded on such an optical disk, it is preferable to optimize drive conditions in the optical disk device, for example, conditions such as laser power and focus bias, but depending on individual drives and data formats. The conditions are different.

Therefore, a technique has been proposed in which, for example, drive conditions are output after a disk is loaded into a drive, the conditions are written in a nonvolatile memory, and recording is performed based on the written conditions.

[0005]

However, since the nonvolatile memory can be used only temporarily while the disk is being loaded, the drive conditions must be changed each time the disk is loaded into the drive. Therefore, there is a problem that it takes a considerable time from when the disk is loaded into the drive to when data can be recorded.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an optical disk and an optical disk apparatus capable of reducing the time from when the disk is loaded into a drive until data can be recorded. I have.

[0007]

In order to solve the above-mentioned problems, an optical disk according to the present invention is an optical disk in which data can be rewritten by a drive of an optical disk device, and data is recorded by the drive. And a management area in which the conditions written by the test writing and the identifier of the drive on which the data was recorded are recorded. .

An optical disk apparatus according to the present invention is an optical disk apparatus having a drive capable of recording / reproducing such an optical disk, wherein conditions for recording data in the test area of the optical disk by the drive are set. Means for performing test writing necessary for writing, and means for recording a condition and an identifier of the drive by the test writing in a management area of the optical disk.

According to the present invention, the conditions written by the trial writing and the identifier of the drive on which the data was recorded are recorded in the management area of the optical disk. The optimum drive conditions can be obtained quickly. Therefore, the time from when the disk is loaded into the drive until data can be recorded can be reduced.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to an optical disk device corresponding to a CD and a DVD as an example.

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

As shown in FIG. 1, a mechanism system 100 of the optical disk apparatus has an optical pickup unit 1, a sled motor and a sled position sensor, and a sled 2 which is a feed mechanism of the optical pickup unit 1, and a spindle motor. A loading mechanism 4 comprising a loading mechanism, a loading sensor, an eject switch, and an LED indicator. The loading mechanism 4 also serves as a loading mechanism for a disc tray (not shown) and an LED display. And The optical pickup unit 1 includes an objective lens 1a for CD, an objective lens 1b for DVD, and a wavelength of 7 for CD.
It has a laser diode 1c of 80 nm, a laser diode 1d having a wavelength of 650 nm for DVD and a driver 1e thereof.

The control system 200 of the optical disk device includes an RF amplifier and a servo amplifier, and a read processor 5 capable of selecting a DPP system or a DPD system for detecting a tracking error of a DVD system, and a clock synchronization circuit for writing a DVD. , A clock processor and a write laser control circuit, and a write processor 6 capable of setting an optimum write condition (OPC).

The control system 200 includes a driver unit 7 composed of a driver IC for driving each motor of the drive system, a signal extraction PLL, an EMF demodulation circuit, and an 8/16 demodulation circuit. It comprises a channel processor 8 capable of outputting and a data processor 9 for performing DVD signal processing and CD signal processing. The data processor 9 includes, for DVD signal processing, an RS-PC encoder / decoder, ID processing for address detection, an 8/16 modulation circuit, and a wobble decoder for detecting a target address on a recordable disc. For CD signal processing,
It has a CIRC decoder and a sub-code decoder for address detection.

Further, the control system 200 is provided with an adjustment function required for servo such as focus bias adjustment, and performs servo signal processing for servo control, and measures the temperature near the optical pickup unit 1. Temperature sensor 11 and drive system control CP
U12, a non-volatile memory 13, data for host transfer, D-RAM 14 used for CD-ROM decoding in the case of a CD, and buffer management for improving host transfer efficiency. , For CD, CD-ROM
A buffer manager 15 as a host interface composed of a decoding circuit and a D for audio
And an audio DAC 16 which is an A converter.

Next, the operation of the optical disk device configured as described above will be described.

First, as shown in FIG. 2, when it is detected that a tray (not shown) of the optical disk device has been pulled in (step 201), the sled 2 is moved to the innermost peripheral portion of the disk (step 201). Step 202), the disk diameter is detected (step 203). Next, the spindle 3 is rotated at a rotation speed of 2000 rpm (step 2).
04), the 780 nm laser diode 1c is turned on under predetermined conditions (step 205), and the presence or absence of a disc is determined (step 206). If it is determined that the disc is not in the tray, the media type is set to NO.
Processing is performed as DISC (step 207), and when it is determined that a disk is in the tray, media determination is performed (step 208).

Next, the operation of media determination will be described with reference to FIG.

First, in the first medium discrimination processing (step 301), whether the medium is a CD (steps 302, 3
03), CD-RW (steps 304 and 305), D
It is determined whether it is a VD system (step 306), and if it is neither, it is treated as unknown (step 30).
7).

If the medium is determined to be a DVD system, a second medium determination process is performed (step 308). In this processing, first, if the determination has failed, the determination is retried (steps 309 and 310), and if not, the medium is a DVD + RW (steps 311 and 31).
2) DVD-SL (steps 313, 314), D
VD-DL (steps 315, 316), DVD-R
(Steps 317 and 318).

When the medium is determined to be DVD + RW, as shown in FIG. 4, a servo is set for DVD + RW (step 401), spin-up is performed (step 402), and the amplitude of the tracking error is adjusted (step 401). 403) Two-axis AGC adjustment (step 404) and focus bias adjustment (step 405) are performed.
Thereby, the focus bias (Focus Bia)
s) The adjusted value FB, the adjusted jitter (Jitter) value J, the inside temperature T, and the laser (Laser) current IOP are obtained.

Here, as shown in FIG. 5, DVD + RW
In the lead-in area and the lead-out area, an inner disk identification zone (Inner Disk Identification) as a management area is provided.
ation Zone), Outer Disk Identification Zone (Outer Disk Id)
Entication Zone and inner drive test zone (Inner) as test area
Drive Test Zone, Outer Drive Test Zone (Outer Drive Test Z)
one). Also, as shown in FIG. 6, an inner disk identification zone (Inner
Disk Identification Zone
Each sector in e) has a management area composed of 120 disk management data. Each disk management data includes a header part and a data part used to identify the disk management data and to determine which disk management data to discard when there is no free space in the disk management area. The header section includes a drive vendor ID (Dr) as a drive identifier equivalent to the drive included in INQUIRY data obtained by INQUIRY command.
live Vendor Identificatio
n), Drive Product ID (Drive Prod
Activ Identification, Drive Product Revision Level (DriveProduct)
The Revision Level, the drive serial number (Drive Serial Number) assigned to the drive when the drive is manufactured, and the cumulative number of disk loads are recorded. The larger the value of the cumulative number of disk loads, the more recently used disk management data of the disk.
If there is no free space in the disk management area despite writing the disk management data, any disk management data must be discarded and new disk management data must be overwritten. At that time, the disk management data with the smallest cumulative number of disk loads is determined to be the least frequently used, so that it can be regarded as appropriate as a candidate for overwriting. The data section records the cumulative number of OPC tests, the internal temperature T, the laser current IOP, the jitter value J, the focus bias value FB, the peak laser output value Pp, the erase laser output value Pb1, and the like. O
The accumulated PC test count is used to select a test writing sector so that the test writing is not repeated in the same sector. The OPC data for each internal temperature is used to calculate an appropriate writing condition from the obtained internal temperature and laser current.

Now, after step 405, the DVD + RW
The data in the upper management area is read (step 40).
6) Search for disk management data that matches the drive identifier stored in the drive of the optical disk device (step 407).

When data in the disk management area having the same drive identifier is found, the disk management data and the focus bias (Focus Bias) are detected.
Focus bias obtained by adjustment (Focus Bi)
as) The adjustment value FB, the jitter (Jitter) value J, the inside temperature T, and the laser (Laser) current IOP are compared,
If the OPC parameter can be calculated using linear prediction or the like, a value is obtained (step 408). If the OPC parameter cannot be calculated, an inner drive test zone (Inner Drive) is obtained.
Test Zone) or outer drive test zone (Outer Drive Test Zone)
In e), the write operation is repeated under some conditions, and the result is judged by a quantitative index such as Jitter measurement to execute an OPC process for obtaining appropriate OPC parameters (step 409).

In order to actually use the OPC parameters obtained in step 408 in the drive, the nonvolatile memory 1
3 (step 410). The stored OPC parameters are referred to each time a write operation is performed, and are used for recording control. Also, by detecting a change in the temperature inside the apparatus or a certain elapsed time, the Focus Bias adjustment in step 405 and the OPC process in step 409 are performed at a time when the influence on the host side is reduced (for example, immediately before the spindle stops), and the focus at that time Bias (Foc
us Bias) Adjustment value FB, Jitter (Jitter)
Data is stored in a form in which the OPC parameters are accumulated in the nonvolatile memory 13 together with the value J, the internal temperature T, and the laser (Laser) current IOP.

On the other hand, as shown in FIG.
When the medium is a DVD + RW (step 701), the focus bias (Focus Bias) adjustment value FB, the jitter (Jitter) value J, the in-machine temperature T, and the laser current IOP accumulated in the non-volatile memory 13 are determined at the time of the “Ject”. The OPC parameters are recorded in the disc management area on the DVD + RW (step 702), and then ejected (step 703). Thus, when the same medium is inserted into the drive again thereafter, the past accumulated data can be reused.

As described above, according to the present embodiment, the time from when the disk is loaded into the drive to when the host computer can read and write the disk (Ready state) can be reduced, and the merchantability can be improved. Also,
The past data of a certain disc is accumulated and reused, so that an appropriate writing condition can be selected, and the reliability of the product is improved. Furthermore, by utilizing the internal temperature, an appropriate writing condition can be selected, and the reliability is improved. In addition, since the write conditions of a plurality of drives can be recorded and searched for on a certain disc, the past data can be used even though the medium is a replaceable medium, and the drive itself can track changes with time of the drive. . This contributes to predicting appropriate viewing conditions, and improves product reliability.

In the above-described embodiment, the drive management area is used for calculating the OPC parameters. However, drive management data can be freely defined and used according to the circumstances of each drive. This leaves the possibility of giving the drive new features. For example, if the decryption key of the encrypted user data is stored in the drive management data, it is possible to create a drive system in which data cannot be read correctly except for the drive. It is also possible to store parameters relating the combination of the disk and the drive, and to optimize the seek.

[0029]

As described above, according to the present invention, the time from when a disk is loaded into a drive until data can be recorded can be reduced.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing a disk detection operation.

FIG. 3 is an operation flow of discriminating a type of a CD and a DVD.

FIG. 4 is an operation flow for setting a write condition in a DVD + RW.

FIG. 5 is a diagram showing a data structure of a DVD + RW.

FIG. 6 is an inner disk identification zone (Inner Disk Iden) shown in FIG. 5;
FIG. 2 is a diagram illustrating a structure of a T.C.

FIG. 7 is an operation flow at the time of ejection.

[Explanation of symbols]

 2 Thread 3 Spindle Mechanism 4 Loading Unit 5 Read Processor 6 Write Processor 7 Driver Unit 8 Channel Processor 9 Data Processor 10 Servo Signal Processor 11 Temperature Sensor 12 Control CPU 13 Nonvolatile Memory 14 D-RAM 15 Buffer Manager 16 DAC 100 Optical Disk Device Mechanism system 200 Control system of optical disk device

Claims (9)

[Claims] 1. An optical disk in which data can be rewritten by a drive of an optical disk device, wherein a condition for recording data by the drive and an identifier of the drive on which the data was recorded are recorded. An optical disk comprising an area. 2. The optical disk according to claim 1, further comprising: a test area for performing test writing necessary for setting conditions for recording data by the drive. 3. The optical disk according to claim 2, wherein the test area and the management area are provided in an area other than a user area. 4. One of claims 1 to 3
The optical disc according to claim 1, wherein the management area is divided into a plurality of blocks according to each identifier of the plurality of drives. 5. The optical disk according to claim 4, further comprising an area in which the total number of times of recording in the management area is recorded. 6. One of claims 1 to 5
An optical disc device having a drive capable of recording and reproducing the optical disc according to the item, comprising: a means for recording a condition for recording data by the drive and an identifier of the drive in a management area of the optical disc. An optical disk device comprising: 7. The optical disk device according to claim 6, further comprising: means for performing test writing necessary for setting conditions for recording data by the drive in a test area of the optical disk. Characteristic optical disk device. 8. The optical disk device according to claim 7, wherein when the condition written by the test writing is recorded in a management area of the optical disk, an identifier of the drive is already recorded in the management area. An optical disk device for recording a condition issued by the test writing corresponding to the identifier of the drive. 9. The method according to claim 6, wherein the first and second parts are different from each other.
The optical disk device according to claim 1, wherein when an optical disk is inserted into the drive, means for detecting an identifier corresponding to the drive from the management area; and when the identifier is detected, a condition corresponding to the identifier. Means for recording data on an optical disk by using an optical disk.