JP2000105975A - Recording control method for optical disk recording/ reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid abnormal recording operation of a disk by checking disk characteristics and executing operation correspondent to the disk characteristics in accordance with the checking command outputted subsequently from the host. SOLUTION: When a disk 1 is loaded on a driving device, the system control circuit 10 performs a checking operation of the characteristics, such as the discrimination of a recording speed performance by a discrimination code recorded on the disk 1 and the discrimination of temperature for recording suitability by detection data from a temperature detecting element, and carries out a setting operation of a laser output. Before the start of the recording operation, a checking command is outputted from a computer device 9. If a recording operation is possible at a recording speed instructed by the device 9, the operation is executed at such speed. If the recording operation is impossible at such command speed, the recording speed to be instructed is lowered by one rank and, if the operation is possible at the altered speed, it is executed at such command speed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk recording / reproducing apparatus configured to record a signal on a disk by a laser radiated from an optical pickup and to reproduce a signal recorded on the disk by the laser. About.

[0002]

2. Description of the Related Art Disk players which read signals recorded on a disk using an optical pickup have become widespread, but recently, in addition to a reproducing function, a disk irradiated by a laser emitted from the optical pickup has been used. An optical disk recording / reproducing apparatus configured to record a signal on the optical disk has been commercialized.

In such an optical disk recording / reproducing apparatus, a pit is formed on a disk by a laser. However, if the laser output is not optimal, the pit shape may be too large or too small. Will do. Therefore, a disk used in such an optical disk recording / reproducing apparatus is provided with a test writing area on the innermost side, and after recording a signal in the test writing area, reproducing the signal, and detecting the reproduced signal. Is configured to set a laser output for recording by using such a technique. For example, such a technique is disclosed in Japanese Patent Application Laid-Open No. 6-76288.

The operation of recording a signal in the data signal recording area provided on the disk is started by the laser output set as described above. This is performed by alternately changing the output for the application. The signal recording operation is optimized for the recording operation by changing the value of the drive current supplied to the laser diode from the laser output control circuit by monitoring the amount of light beam output from the laser diode with the monitor diode. It is configured to adjust to laser output, but at this time, the rotation speed of the disk is controlled using the signal read from the disk with the light beam output from the laser diode driven by the output for reproduction It is configured to

[0005] The laser output adjustment operation is configured to sample a monitor signal obtained from a monitor diode and to perform the operation based on the sampled signal.

Recently, it has been configured to be able to record signals while rotating the disk at a high speed such as 2, 4, 6, or 8 times the specified recording speed. An optical disk recording / reproducing apparatus has been developed.

[0007]

The operation of recording a signal on a disk is performed by forming a pit on a signal track provided on the disk by a light beam output from a laser diode. Is set to be a specified size. The recording operation of such a signal is performed by rotating the disk at a predetermined constant linear velocity.However, if the linear velocity during the recording operation is increased, the influence of the laser output, the change in the rotational speed of the disk, and It is greatly affected by the characteristics of the disk itself. Further, as the types of recording discs, there are discs compatible with high-speed recording and discs capable of performing only low-speed recording.

In an optical disk recording / reproducing apparatus called a write-once type, when a signal recording operation is performed in accordance with a recording command from a host, if the recording operation on the disk is not performed normally, the signal recorded on the disk is Not only cannot perform the read operation, but also the signal cannot be recorded on the disk, and the disk is discarded.

An object of the present invention is to provide a recording control method capable of solving such a problem.

[0010]

According to the present invention, when a disk is mounted on a drive device, the disk characteristics are checked, and an operation corresponding to the disk characteristics is performed in response to a check command output from the host thereafter. Things.

[0011]

FIG. 1 is a flowchart showing a recording control method according to the present invention, and FIG. 2 is a block circuit diagram showing one embodiment of an optical disk recording / reproducing apparatus according to the present invention.

In FIG. 2, reference numeral 1 denotes a spindle motor 2
The disk is mounted on a turntable 3 driven to rotate by the rotation of the turntable 3 and is driven to rotate by the rotation of the turntable 3. Position information data is recorded in a groove called a wobble. Is configured to perform a signal recording / reproducing operation based on. Reference numeral 4 denotes a laser diode for irradiating the disc 1 with a light beam and a monitoring diode for monitoring light emitted from the laser diode, and a photodetector for receiving the light beam reflected from the signal surface of the disc 1 is provided. This is an optical pickup incorporated therein, and is configured to be moved in the radial direction of the disc 1 by a pickup feed motor (not shown).

Reference numeral 5 denotes an RF signal amplifier circuit for amplifying an RF signal obtained from a photodetector incorporated in the optical pickup 4 and shaping the waveform. 6 denotes a signal obtained through the RF signal amplifier circuit 5. A pickup control circuit for performing focusing control for focusing the light beam of the optical pickup 4 on the signal surface of the disk 1 and tracking control for following the signal beam on the signal surface of the signal surface.

Reference numeral 7 denotes a digital signal processing circuit that performs digital signal processing of the signal output from the RF signal amplifier circuit 5 and performs a demodulation operation of various signals, and 8 denotes a digital signal processed by the digital signal processing circuit 7. A signal reproducing circuit to which a signal is input. When the information recorded on the disc 1 is an audio signal, the signal is converted into an analog signal and then output to an amplifier or the like, and when the data signal is data such as computer software. Has a function of outputting a digital signal as it is to the computer device 9 provided as a host.

Reference numeral 10 denotes a system control circuit which receives a signal demodulated by the digital signal processing circuit 7 and performs various control operations in accordance with a command signal output from the computer device 9. Reference numeral 11 denotes a spindle motor control circuit whose operation is controlled by the system control circuit 10, which has an operation of controlling the rotational speed of the spindle motor 2 to rotate.

Reference numeral 12 denotes a laser drive circuit for driving a laser diode incorporated in the optical pickup 4, and reference numeral 13 denotes a laser output control circuit whose operation is controlled by the system control circuit 10. It is configured to set the output of the laser by controlling. Reference numeral 14 denotes a signal recording circuit that receives a recording signal such as a test signal or an information signal and controls the laser irradiation operation of the laser driving circuit 12 in accordance with the signal to record the signal on the disk 1. is there.

As described above, the optical disk recording / reproducing apparatus according to the present invention is configured. Next, the reproducing operation in the circuit configured as described above will be described. A system control circuit 1 that constitutes a drive device from a computer device 9
When a command signal for performing a reproducing operation is output to 0, a control operation for the reproducing operation by the system control circuit 10 is started. When such a reproducing operation is performed, a driving current for obtaining a laser output for performing a signal reading operation is supplied from the laser driving circuit 12 to the laser diode incorporated in the optical pickup 4. Is set to

When the control operation for such a reproducing operation is started, the rotation control operation of the spindle motor 2 by the spindle motor control circuit (11) is performed, and the focusing control operation and the tracking control operation of the optical pickup 4 are performed. Once started, the operation of reading signals from the disk 1 by the optical pickup 4 is started. The signal read by the optical pickup 4 is input to the digital signal processing circuit 7 through the RF signal amplification circuit 5 and the signal is demodulated. When signal processing is performed by the digital signal processing circuit 7 to extract information data, the information data is subjected to signal processing such as error correction and then applied to the signal reproduction circuit 8.

When the information data read from the disk 1 is an audio signal, the signal reproducing circuit 8 converts the information data into an analog signal and outputs the analog signal to an amplifier or the like. In this case, the digital signal is output to the computer 9 as it is.

As described above, the reproducing operation in this embodiment is performed. Next, the recording control method which is the gist of the present invention will be described with reference to the flowchart shown in FIG.

The operation of recording a signal on a disk is performed by first mounting the disk 1 on a drive device (step A). When the disk 1 is mounted on the drive, the characteristics of the disk 1 are checked by the operation of the system control circuit 10 and the like incorporated in the drive (step B).

In the characteristic check performed in step B, the performance of the recording speed is determined by using the discrimination code recorded on the disk, and the detected data obtained from the temperature detecting element incorporated in the drive device is determined. More suitable recording and unsuitable temperature judgments are performed, and a check such as detection of a recordable speed is performed by detecting a vibration caused by warpage or eccentricity of the disc, and such a check is performed. After that, a laser output setting operation for performing the optimum recording is performed.

When the above operation is performed, before the recording operation is started from the computer device 9, that is, the host side,
A check command is output to the drive device (step C). When such a command is output from the computer device 9 to the drive side, it is first determined whether or not there is a disk (step D). Step D
When it is determined that there is no disk, a signal indicating that there is no disk is output from the drive side to the computer device 9, and a display indicating that there is no disk is displayed on a display device or the like connected to the computer device 9. (Step E).

If it is determined in step D that there is a disk, it is determined whether the mounted disk is a recordable disk (step F). If it is determined in step F that the disc is not a recordable disc, the fact that the disc should be replaced is displayed on the display device (step G).

If it is determined in step F that the disc is a recordable disc, it is determined whether or not a recording operation can be performed at a recording speed instructed by the computer device 9 to perform a recording operation ( Step H). If it is determined in step H that the recording operation is possible,
A recording operation is performed at the command speed (step I).

If it is determined in step H that the recording operation at the command speed cannot be performed, the command recording speed is reduced to a speed one rank lower (step J). When such a command is issued, it is determined whether or not the recording operation can be performed at the changed command speed (step K). If it is determined in step K that the recording operation is possible, the recording operation is performed at the command speed (step L).

If it is determined in step K that the recording operation cannot be performed at the changed instruction speed, it is determined whether the instruction recording speed is the minimum speed (step M).
If it is determined in step M that the recording speed is not the minimum recording speed, the process returns to step J and the above-described operation is performed.

If it is determined in step M that the changed recording speed is the minimum speed, a message is displayed on the display device indicating that the loaded disk is a recording-inappropriate disk (step N).

[0029]

According to the present invention, when a disk is mounted on a drive device, the disk characteristics are checked and an operation corresponding to the disk characteristics is performed in response to a check command output from the host thereafter. Therefore, it is possible to avoid performing a recording operation on a disc on which a recording operation cannot be performed normally.

Further, according to the present invention, when the recording speed specified by the host is the recording speed set to be recordable by the drive device, the recording operation is performed, so that the recording operation can be started immediately. Can be done.

According to the present invention, when the recording speed specified by the host is not the recording speed set to be recordable by the drive device, the recording speed is reduced by one rank. The recording operation at the fastest speed among the set ones can be performed.

Further, according to the present invention, when the recording speed is set to the minimum speed and the recording speed is not the recording speed set to be recordable by the drive device, it is displayed that the disc is a non-recordable disc. Therefore, it is possible to recognize that the recording disk needs to be replaced, and it is possible to prevent erroneous recording operation.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating a recording control method of the present invention.

FIG. 2 is a block circuit diagram showing one embodiment of an optical disk recording / reproducing apparatus according to the recording control method of the present invention.

[Explanation of symbols]

 Reference Signs List 1 disc 2 spindle motor 4 optical pickup 6 pickup control circuit 7 digital signal processing circuit 9 computer device 10 system control circuit 11 spindle motor control circuit 12 laser drive circuit

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5D044 BC04 CC04 DE75 EF06 GK18 5D066 DA11 DA16 5D119 AA22 BA01 BB02 DA14 HA17 HA18 HA21

Claims (4)

[Claims] An optical disk recording / reproducing apparatus configured to be able to record a signal on a disk at a recording speed that is a plurality of times higher than a specified speed when a disk is mounted on a drive device. A recording control method for an optical disk recording / reproducing apparatus, wherein a check is performed and an operation corresponding to a characteristic of the disk is performed in response to a check command output from the host thereafter. 2. When a recording speed specified by a host is a recording speed set to be recordable by a drive device,
The recording control method according to claim 1, wherein a recording operation is performed. 3. When the recording speed specified by the host is not the recording speed set to be recordable by the drive device,
2. The recording control method according to claim 1, wherein the recording speed is reduced by one rank. 4. When the recording speed is set to the minimum speed,
4. The recording control method according to claim 3, wherein when the recording speed is not the recording speed set to be recordable by the drive device, the disc is displayed as a recording-inappropriate disc.