JP2001266484A - Recording control method for optical disk recording and reproducing unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording control method for an optical disk recording and reproducing unit, with which signals can be recorded on a disk by a laser radiated from an optical pickup. SOLUTION: Concerning an optical disk recording and reproducing unit provided with a function for interrupting and restarting recording operation on the basis of the quantity of recording signals stored in a RAM for buffer, which is provided for temporarily storing the recording signals, and constituted to record signals for each track, the signals are recorded without forming a link part between tracks and when the operation of recording to the disk is completed, deciding operation is performed on whether these are signal recordable areas equal to or more than a prescribed quantity on the disk or not. When it is decided there are signal recordable areas equal to or more than the prescribed quantity, information data showing the recording positions of the recording signals are recorded on a buffer area provided on the disk.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc recording apparatus which records a signal on a disc by a laser beam emitted from an optical pickup and reproduces a signal recorded on the disc by the laser beam. It relates to a playback device.

[0002]

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

Recently, a signal recording operation has been performed in a state in which the rotation of the disk is controlled at a constant linear velocity of 2 times, 4 times, 6 times, and 8 times the prescribed recording linear velocity. An optical disk recording / reproducing device capable of performing the following has been developed. As a method of recording a signal on the disk, a method of continuously recording signals from the inner peripheral side to the outer peripheral side of the disk like a disk on which an audio signal is recorded, a signal for each area called a session. And a method of recording a signal for each track.

[0004]

When recording a signal by a method called a session, if the outermost periphery of the disk is considered as one session from the innermost periphery, the signal is continuously transmitted from the inner periphery to the outer periphery. The method is the same as the recording method, but in the method of recording each track called track-at-once, an area called a link is generated between the signal recorded up to the previous time and the signal recorded next time. Become.

When a signal such as music is recorded by the track-at-once method, a link is formed between songs, and a disc on which such a signal is recorded is used as an optical disc exclusively for audio. In the case of reproduction by a reproduction device, there is a problem that reproduction becomes impossible at a link portion.

An object of the present invention is to provide a recording control method for an optical disk recording / reproducing apparatus which solves such a problem.

[0007]

According to the present invention, when the amount of a recording signal stored in a buffer RAM provided for temporarily storing a recording signal is insufficient, the operation of recording a signal on a disk is interrupted, and When the amount of the recording signal stored in the RAM reaches a predetermined amount, the recording operation is restarted so that the data is continued to the recording signal recorded on the disk, and the signal is recorded for each track. In the optical disk recording / reproducing apparatus configured to perform the above operation, when a signal is recorded without forming a link portion between tracks and the recording operation on the disk is completed,
An operation of determining whether or not the signal recordable area of the disk is equal to or more than a predetermined amount is performed. When it is determined that the signal recordable area is equal to or more than the predetermined amount, the recording position of the recording signal is set in a buffer area provided on the disk. The information data shown is recorded.

[0008]

FIG. 1 is a block circuit diagram showing an embodiment of an optical disk recording / reproducing apparatus according to the present invention. In the figure,
1 is mounted on a turntable 3 driven to rotate by a spindle motor 2 and
The disk is rotationally driven by the rotation of the optical disk. Position information data is recorded in a groove called a wobble, and a signal recording / reproducing operation is performed based on a wobble signal obtained from the groove. Reference numeral 4 denotes a laser element for irradiating the laser beam to the disk 1 and a monitoring diode for monitoring the laser beam emitted from the laser element, and a photodetector for receiving the laser reflected from the signal surface of the disk 1 is provided. An optical pickup incorporated therein, which is configured to be displaced in the radial direction of the disk 1.

Reference numeral 5 denotes an RF signal amplifying circuit for amplifying and shaping an RF signal obtained from a photodetector incorporated in the optical pickup 2, and 6 denotes a signal obtained via the RF signal amplifying circuit 5. Laser light emitted from the optical pickup 4 based on the
And a pickup control circuit that performs a focusing control operation for focusing on the signal surface of the optical disk and a tracking control operation for causing the laser light to follow a signal track on the signal surface.

Reference numeral 7 denotes a digital signal processing circuit which performs digital signal processing of signals output from the RF signal amplifier circuit 5 and performs demodulation 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 to a computer device as it is.

Reference numeral 9 denotes an operation circuit section provided for switching the operation of the optical disk recording / reproducing apparatus, and has a function of performing an editing operation of a recording operation and the like. Reference numeral 10 denotes a recording signal input circuit to which a recording signal output from an external device is input, and reference numeral 11 denotes a signal that is demodulated by the digital signal processing circuit 7 and is output from the operation circuit unit 9. This is a system control circuit that performs various control operations according to the operation switching control signal, and incorporates a buffer RAM 12 in which a recording signal input from the recording signal input circuit 10 is temporarily stored.

Reference numeral 13 denotes a laser drive circuit for supplying a drive signal to a laser element incorporated in the optical pickup 4, and reference numeral 14 denotes a laser output control circuit whose operation is controlled by the system control circuit 11. The laser output is set by controlling the circuit 13. Reference numeral 15 denotes a test signal or a recording signal read from the buffer RAM 12, and controls the laser light irradiation operation of the laser driving circuit 13 in accordance with the signal, thereby converting the recording signal to the disk 1. Is a signal recording circuit for recording a signal.

Reference numeral 16 denotes a spindle motor drive circuit for controlling the rotation speed of the spindle motor 2 so as to be a linear speed suitable for a recording operation. The operation of the spindle motor drive circuit 16 is controlled by the system control circuit 11. I have.

In such a configuration, the recording signal input circuit 1
0 through the buffer RA
After being temporarily stored in M12, the buffer RAM 1
2 and is recorded on the disk 1. However, if the amount of recording signals stored in the buffer RAM 12 is insufficient, the recording operation on the disk 1 is interrupted and the recording stored on the buffer RAM 12 is stopped. When the signal amount reaches a predetermined amount, the recording operation is restarted, and the signal is recorded continuously to the signal recorded on the disk 1 until then.

In the case of performing a recording operation by the track-at-once method, when the recording operation for each track is completed, a lead-out or lead-in area is created for each track and the recording operation is completed. .

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. The switching signal for reproduction output from the operation circuit section 9 is transmitted to the system control circuit 11.
, A control operation for a reproduction operation by the system control circuit 11 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 to the laser element incorporated in the optical pickup 4 by the laser driving circuit 1.
3 is set.

When the control operation for such a reproduction operation is started, the rotation control operation of the spindle motor 2 by the spindle motor drive circuit 16 is performed, and the focusing control operation and the tracking control operation of the optical pickup 4 are started. Thus, 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 a signal, the signal is subjected to signal processing such as error correction and then applied to a signal reproducing circuit 8.

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

In such a circuit configuration, when the disk 1 is inserted into the mounting portion of the disk in order to perform a signal recording operation, a laser output setting operation is performed. Such a laser output setting operation is performed based on a program stored in a memory circuit provided in the system control circuit 11. The operation of setting the laser output is performed in a stepwise manner by the control signal output from the laser output control circuit 14 to control the magnitude of the drive current supplied from the laser drive circuit 13 to the laser element incorporated in the optical pickup 4. This is performed by recording the test signal while changing it to the above and reproducing the recorded signal.

When the magnitude of the drive current supplied to the laser element is changed stepwise, the output of the laser light output from the laser element changes, so that the level of the signal recorded on the disk 1 also changes. Become. Then, the level of the signal recorded on the disc 1 with respect to the laser output is detected, and when the level of the signal to be reproduced reaches a desired value, the laser output at that time is set as the laser output for performing the recording operation.

The recording operation of the signal in the signal recording area is started by the laser output thus set, and when the recording operation of the data signal is performed,
By monitoring the change in the laser light reflected from the disk 1, the value of the drive current supplied to the laser element from the laser drive circuit 13 is changed so that the laser output is always adjusted to the optimum laser output for the recording operation. It is configured.

As described above, the recording operation of the test signal in the test writing area and the recording operation of the signal in the signal recording area are performed. In order to perform the recording operation, the laser driving circuit 13 transmits the test signal to the laser element. A control operation by a laser servo circuit (not shown) is always performed on the supplied drive signal.

A recording signal output from an externally provided disk player or the like is stored in a buffer RAM 12 via a recording signal input circuit 10. The recording signal stored in the buffer RAM 12 is read out when a recording operation is performed on the disk 1 and input to the signal recording circuit 15. As a result of the recording signal input to the signal recording circuit 15 being applied to the laser driving circuit 13, a driving signal corresponding to the recording signal is supplied from the laser driving circuit 13 to the laser element constituting the optical pickup 4. . The signal recording operation to the disk 1 is performed by such an operation, but when the recording signal is a data signal such as computer software, the operation is performed by the track-at-once method. Since the recording operation by such a method is well known, its description is omitted.

Next, the gist of the present invention, that is, a recording control method for recording a tune or the like as an audio signal by an optical disk recording / reproducing apparatus having a track-at-once function will be described.

When a tune recording operation is performed by the track-at-once method, a lead-in area and a lead-out area are formed every time one tune recording operation is performed, and a tune is recorded between the next tune to be recorded. A link is formed,
According to the present invention, the recording operation by the track-at-once method is controlled so as not to be performed.

An optical disk recording / reproducing apparatus according to the present invention comprises:
If the amount of the recording signal stored in the buffer RAM 12 becomes insufficient while performing the signal recording operation on the disk 1, the recording operation on the disk 1 is temporarily interrupted and stored in the buffer RAM 12. When the amount of the recording signal to be recorded reaches a predetermined amount, an operation of restarting the recording operation is performed so that the data is continuous with the recording signal recorded on the disk 1.

Since such a recording control operation is performed, the recording signal input circuit 1
If the operation of writing the recording signal input from 0 to the buffer RAM 12 is delayed, the operation of recording the signal to the disk is interrupted, and then the next signal to be recorded is written to the buffer RAM 12 by the edit control operation. When the amount of the recording signal reaches a predetermined amount, the disk 1
The recording operation to the is resumed. Then, the signal recorded by the recording resumption operation after the recording interruption is recorded following the signal recorded before the interruption, so that, for example, when the recording signal is a music, No link is formed between them. Since the music is recorded in this manner, the signal can be reproduced even by an audio-only optical disk reproducing device.

Since the signal recording operation to the disk 1 is performed as described above, the operation of changing the order of recording the music while selecting the music output from the external device is performed. Can be done. The recording operation on the disk 1 is performed by such a recording operation. When the recording operation on the disk 1 is completed, by recognizing the position where the recording operation is completed, it is determined whether or not the signal recordable area has a predetermined amount. A determination operation is performed. That is, an operation of detecting the remaining amount of the signal recording area is performed.

When it is determined that the signal recordable area of the disc 1 is equal to or more than the predetermined amount by such a determination operation, the signal can be additionally recorded by the next recording operation.
An operation of recording information data indicating the position of a signal recorded on the disk 1 into a buffer area provided on the disk 1 is performed.

When performing the operation of recording the next signal on the disk 1 on which the signal has been recorded by the above-described operation, the operation is performed by reading the information data recorded in the buffer area. That is, since information data indicating the position of the signal recorded last by the previous recording operation is recorded in the buffer area, it is possible to recognize the position where the next signal is recorded by reading such information data. Can be done. As a result of performing such a recognition operation, the next signal can be recorded following the signal recorded up to the previous time.

As described above, the operation is performed when it is determined by the determination operation that the signal recordable area of the disk 1 is equal to or more than the predetermined amount, but when it is determined that the signal recordable area is not equal to or more than the predetermined amount, If it is determined that the remaining amount of the signal recording area is smaller than the predetermined amount, TOC data, which is information data indicating recording positions of all signals recorded on the disk 1, is stored in a lead-in area provided on the disk 1. Is recorded. As a result of recording the signals in this manner, the reproduction operation of all the signals recorded on the disk 1 can be performed without any trouble by the optical disk reproduction apparatus dedicated to audio.

[0032]

According to the present invention, when the amount of the recording signal stored in the buffer RAM provided for temporarily storing the recording signal is insufficient, the operation of recording the signal on the disk is interrupted. When the amount of the recording signal stored in the buffer RAM reaches a predetermined amount, a function of restarting the recording operation so that the data is continuous with the recording signal recorded on the disk is provided. In the optical disc recording / reproducing apparatus configured to record a signal, when a signal is recorded without forming a link portion between tracks and the recording operation on the disc is completed, the signal recordable area of the disc is equal to or more than a predetermined amount. And if it is determined that the signal recordable area is equal to or larger than a predetermined amount, the recording signal is recorded in a buffer area provided on the disc. Since the information data indicating the recording position is recorded, that is, when the signal recorded on the disc is an audio signal, a link portion is not formed between the songs, so that only audio-only Not only can the optical disc reproducing apparatus perform the signal reproducing operation without any trouble, but when the signal recordable area is equal to or more than a predetermined amount, the information data is recorded in the buffer area provided on the disc. There is an advantage that the additional recording operation of the signal can be performed without any trouble.

Further, according to the present invention, when the amount of the recording signal stored in the buffer RAM provided for temporarily storing the recording signal is insufficient, the operation of recording the signal to the disk is interrupted. When the amount of the recording signal stored in the buffer RAM reaches a predetermined amount, a function of restarting the recording operation so that the data is continuous with the recording signal recorded on the disk is provided. In the optical disc recording / reproducing apparatus configured to record a signal, when a signal is recorded without forming a link portion between tracks and the recording operation on the disc is completed, the signal recordable area of the disc is equal to or more than a predetermined amount. When it is determined that the signal recordable area is not equal to or more than the predetermined amount, the read-in area provided on the disc is Since the TOC data indicating the recording position of the recording signal is recorded, that is, when the signal recordable area is less than a predetermined amount, the TOC data is recorded in the lead-in area provided on the disc. The operation can be performed efficiently.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram showing one embodiment of an optical disk recording / reproducing apparatus according to a 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 operation circuit section 10 recording signal input circuit 11 system control circuit 12 buffer RAM 13 laser drive circuit

Claims (2)

[Claims] When the amount of a recording signal stored in a buffer RAM provided to temporarily store a recording signal is insufficient, a signal recording operation on a disk is interrupted and the buffer RAM is stopped. When the amount of the recording signal stored in the disk reaches a predetermined amount, a function of restarting the recording operation so that the data is continued to the recording signal recorded on the disk is provided, and the signal is recorded for each track. In the optical disc recording / reproducing apparatus configured in
When a signal is recorded without forming a link portion between tracks and the recording operation on the disk is completed, an operation of determining whether the signal recordable area of the disk is equal to or more than a predetermined amount is performed, and the signal recordable area is determined. A recording control method for an optical disk recording / reproducing apparatus, characterized in that when it is determined that there is a predetermined amount or more, information data indicating a recording position of a recording signal is recorded in a buffer area provided on the disk. 2. When the amount of a recording signal stored in a buffer RAM provided for temporarily storing a recording signal is insufficient, a signal recording operation to a disk is interrupted and the buffer RAM is stopped. When the amount of the recording signal stored in the disk reaches a predetermined amount, a function of restarting the recording operation so that the data is continued to the recording signal recorded on the disk is provided, and the signal is recorded for each track. In the optical disc recording / reproducing apparatus configured in
When a signal is recorded without forming a link portion between tracks and the recording operation on the disk is completed, an operation of determining whether the signal recordable area of the disk is equal to or more than a predetermined amount is performed, and the signal recordable area is determined. A recording control method for an optical disk recording / reproducing apparatus, characterized in that when it is determined that there is no more than a predetermined amount, TOC data indicating a recording position of a recording signal is recorded in a lead-in area provided on the disk.