JP2000268492A - Optical disk recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an optical disk recording and reproducing device capable of recording signals on the disk, by laser beams emitted from an optical pickup. SOLUTION: This device is provided with a RAM 10 for buffer in which a recording signal outputted from a control equipment is written, the written recording signal is read out at the time of the recording operation of a signal to a disk 1 and also recording signals outputted from the control equipment, for every time when the recording signal is read out, are successively written in an area when the recording signal is read out. Then, the readout operation of the recording signal from the RAM 10 is started at the time of starting the recording operation of the recording signal, and the writing operation of a recording signal to the RAM 10 is not performed for a prescribed time.

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.

[0003] Among devices capable of recording signals on a disc, there are a write-once type capable of performing a signal recording operation only once and a rewritable type capable of repeatedly recording.

Recently, it has been configured such that a signal can be recorded in a state in which the rotation of the disk is controlled at a constant linear velocity of twice, four times, or the like with respect to a specified recording linear velocity. Optical disc recording and reproducing devices have been developed.

[0005]

The rewritable optical disk recording / reproducing apparatus is configured to perform a signal recording operation in accordance with a recording command from a host. In area,
The three areas of the signal recording area where the data signal is recorded and the lead-out area where the lead-out data are recorded are 1
The signal is recorded as one session.

[0006] Such a rewritable optical disk recording / reproducing apparatus needs to increase the output of a laser used for a recording operation as compared with a write-once optical disk recording / reproducing apparatus. Then, the magnitude of the laser output is several times larger than the laser output during the reproducing operation.

In such a rewritable optical disk recording / reproducing apparatus, when the recording signal recording operation is started, an operation of instantaneously increasing the laser output from the reproduction level to the recording level is performed. As a result, there is a problem that the tracking servo operation of the optical pickup is affected, and sometimes a recording abnormal state occurs.

An object of the present invention is to provide an optical disk recording / reproducing apparatus which can solve such a problem.

[0009]

According to the present invention, a recording signal output from a control device is written, a read operation of the written recording signal is performed during a signal recording operation on a disk, and a recording signal read operation is performed. A buffer RAM in which a recording signal output from a control device is sequentially written in an area where the recording signal is read every time an operation is performed is provided, and a reading operation of the recording signal from the buffer RAM is started when the recording signal recording operation starts. At the same time, the writing operation of the recording signal to the buffer RAM is not performed for a predetermined time.

[0010]

1 is a block circuit diagram showing an embodiment of an optical disk recording / reproducing apparatus according to the present invention, and FIG. 2 is a diagram for explaining the operation of the present invention.

In FIG. 1, reference numeral 1 denotes a disk mounted on a turntable (not shown) driven to rotate by a spindle motor (not shown), and is configured to be driven to rotate by rotation of the turntable. Have been. Also. Position information data is recorded on the disc 1 by a groove called a wobble, and a signal recording / reproducing operation is performed based on a wobble signal obtained from the groove. Reference numeral 2 denotes a laser diode for irradiating the disk 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 disk 1. 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 3 denotes an RF signal amplifying circuit that amplifies an RF signal obtained from a photodetector incorporated in the optical pickup 2 and shapes the waveform, and 4 denotes a signal obtained through the RF signal amplifying circuit 3. A pickup control circuit for performing focusing control for focusing a light beam of the optical pickup 2 on a signal surface of the disk 1 and tracking control for causing the light beam to follow a signal track on the signal surface.

Reference numeral 5 denotes a digital signal processing circuit that performs digital signal processing of signals output from the RF signal amplifier circuit 3 and performs demodulation operations of various signals, and 6 denotes a digital signal processed by the digital signal processing circuit 5. 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 the function of outputting the digital signal as it is to the computer device 7 provided as a host.

Reference numeral 8 denotes a system control circuit which receives a signal demodulated by the digital signal processing circuit 5 and performs various control operations in accordance with a command signal output from the computer device 7. Reference numeral 9 denotes a recording signal, such as a test signal or an information signal, which is input and controls a laser irradiation operation by a laser driving circuit (not shown) in accordance with the signal, thereby recording a data signal or the like on the disk 1. This is a signal recording circuit.

Reference numeral 10 denotes a lead-in area where TOC data is recorded, a signal recording area where a data signal is recorded, and a lead-out data when a recording command signal for a data signal is output from the computer device 7. Is a buffer RAM for storing information data, which is position information of a lead-out area in which is recorded, and a data signal recorded on the disk 1 based on the information data.

In such a configuration, information data and data signals, which are recording signals output from the computer device 7, are temporarily written in areas A and B provided in the buffer RAM 10 as shown in FIG. Thereafter, the data signals written to the areas A and B during the recording operation on the disk 1 are read out in order and recorded at the recording position of the disk 1 as a and b. Then, the read operation of the information data and the data signal written in the area A of the buffer RAM 10 is performed,
In the case where the recording operation is normally performed, an operation of writing the next information data or data signal output from the computer device 7 to the read area A is performed. Of course, when the operation of reading the information data or data signal written in the area B is performed and the recording operation on the disk 1 is performed normally, the information is output from the computer device 7 to the area B that has been read. The next information data and data signal are sequentially written.

According to the present invention, when the recording of the information data and the data signal is started, the operation of reading the information data and the data signal written in the area A of the buffer RAM 10 is performed, and the recording operation on the disk 1 is performed. Even if it is performed, it is configured such that the next information data or data signal is not written in the read area A of the buffer RAM 10 for a predetermined time. If the signal recording operation is not performed normally during the predetermined time, the buffer RA
The read operation of the information data and the data signal written in the area A of M10 is performed again, and the read information data and the data signal are read from the disk 1 on which the first set is performed.
The operation of recording at the recording start position is performed again.

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 8 that constitutes a drive device from a computer device 7
When a command signal for performing a reproducing operation is output to the system controller 8, a control operation for the reproducing operation by the system control circuit 8 is started. When such a reproducing operation is performed, the laser diode incorporated in the optical pickup 2 is supplied with a driving current for obtaining a laser output for performing a signal reading operation from a laser driving circuit. Is set.

When the control operation for such a reproducing operation is started, the rotation control operation of the spindle motor is performed by the spindle motor control circuit. The rotation control operation of the spindle motor decodes the wobble signal. Obtained synchronization signal and reference signal generation circuit (not shown)
The disc 1 is driven to rotate at a constant linear velocity by comparing the output signal with a reference signal. Such a control operation is similarly performed at the time of a signal recording operation described later.

The rotation control operation of the spindle motor is performed as described above. In the optical pickup 2 which performs a signal readout operation, a focusing control operation and a tracking control operation are started, and the optical pickup 2 is started.
, The reading operation of the signal from the disc 1 is started. Before the reproducing operation, the reading operation of the TOC data recorded in the lead-in area constituting the first session of the disc 1 is performed.

The reading and reproducing operation of the data signal recorded in the signal recording area of the first session of the disc 1 is performed based on the TOC data recorded in the lead-in area. The optical pickup 2
The signal read by the digital signal processing circuit 5 is amplified and shaped by the RF signal amplifying circuit 3.
To demodulate the signal. When signal processing is performed by the digital signal processing circuit 5 to extract information data, the information data is applied to a signal reproduction circuit 6 after signal processing such as error correction is performed.

When the information data read from the disk 1 is an audio signal, the signal reproducing circuit 6 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 7 as it is.

As described above, the reproducing operation is performed. Since the reproducing operation is performed based on the TOC data recorded in the lead-in area, the reproduced signal is a data signal constituting the first session. It is recorded in the recording area. Similarly, by reading out the TOC data recorded in the lead-in area constituting the next session, the operation of reproducing the signal recorded in the data signal recording area in which the signal corresponding to the TOC data is recorded. Can be done.

As described above, the reproducing operation in this embodiment is performed. Next, the operation of recording a signal on the disk 1 will be described.

The operation of recording a signal on the disk 1 is performed by first recording and reproducing a test signal in a test writing area provided on the disk 1 so that a drive current for obtaining a laser output optimal for the recording operation is supplied to the laser diode. Set to be supplied. When the laser output setting operation is performed, an operation of reading information data recorded in a buffer area provided on the disk 1, that is, position information of a signal recorded in a signal recording area, and the like is performed.

Based on the information data read in this manner, whether a data signal recording operation can be performed in a signal recording area provided on the disk 1, and where the recording operation is to be performed are determined. A recognition operation is performed. When such a recognition operation or the like is completed, a signal is recorded from a predetermined position set based on the information data recorded in the buffer area. A recording command signal including a recording position information data based on the amount and a data signal to be recorded is output. Such a recording command signal is transmitted to the system control circuit 8.
Then, a processing operation of creating recording position information data from the command signal and storing the created information data in the buffer RAM 10 is performed.

When information data is stored in the buffer RAM 10, an operation of reading the information data stored in the buffer RAM 10 and recording the information data in a buffer area provided on the disk 1 is performed. The operation of recording information data in the buffer area is repeatedly performed a predetermined number of times. When the recording operation of the information data is completed, the optical pickup 2 is moved based on the information data indicating the recording position, and the recording operation of the signal to each area is performed.

After the above-described processing operation is performed, the disk 1
The signal recording operation is started. As a signal recording method, first, TOC data is recorded in a lead-in area, then a data signal is recorded in a signal recording area, and then lead-out data is recorded in a lead-out area. And the method of recording the data signal in the signal recording area and then
There is a method of performing an operation of recording OC data and an operation of recording lead-out data in a lead-out area.

In any of the methods, the recording operation on the disk 1 is configured such that a recording signal output from the computer device 7 is once written in the buffer RAM 10 and then the signal is read out and recorded on the disk 1. I have. When a command to record a signal on the disk 1 is output from the computer device 7, the optical pickup 2 is moved to the recording position after the above-described processing operation is performed, and the laser output is instantaneously changed to a large recording level. Is performed.

First, the case where the recording operation on the disk 1 is performed normally will be described. The recording signal output from the computer device 7 is stored in the buffer RAM 10 as shown in FIG.
Are written as shown in A and B of FIG. In this manner, the recording signal written in the buffer RAM 10 is read out and recorded on the disk 1 from FIG. The signal written in the area A of the buffer RAM 10 is read out and recorded on the disk 1 as a. When the recording operation is started normally, the signal written in the area B is read out. This is recorded on the disc 1 as b. When the signal written in the area B is read out and recorded on the disk 1 as b, an operation of writing a recording signal subsequent to the area B into the area A is performed. By repeating such operations sequentially, a recording operation of the recording signal output from the computer device 7 on the disk 1 is performed.

The operation when the recording operation on the disc 1 is performed normally is performed as described above. Next, the operation when a recording abnormality occurs at the start of recording will be described. The recording signal output from the computer device 7 is stored in the buffer RAM 10 as shown in FIG.
B is written as shown. Then, the recording signal written in the buffer RAM 10 is read out and recorded on the disk 1 as shown in FIG. 2A. If an abnormality occurs while recording this a, ,
The recording operation is temporarily stopped, the optical pickup 2 is returned to the recording start position, and the reading operation of the signal written in the area A of the buffer RAM 10 is performed again.
In other words, a predetermined time after the start of recording, that is, a time when a recording abnormal state is likely to occur due to the start of recording, the next recording is performed on the area A of the buffer RAM 10 even if the reading operation of the signal written in the area A is performed. The signal writing operation is not performed.

When the signal written in the area A of the buffer RAM 10 is read out and normally recorded on the disk 1 as a, the area B of the buffer RAM 10
Is written to the disk 1 and
And the writing operation of the next recording signal in the area A is started.

In addition, the recording operation of the signal on the disk may be performed not at a constant constant linear velocity which is a low speed but at a constant linear velocity which is twice or four times higher than the prescribed linear velocity. In an optical disk recording / reproducing apparatus configured to be capable of performing a high-speed recording operation at a constant linear velocity of, for example, 4 ×, the linear velocity of the disk is not properly started when the recording operation of the recording signal to the disk is not started normally. May be doubled and sequentially changed to a lower speed side to a specified speed.

[0034]

According to the present invention, the recording signal output from the control device is written, and at the time of recording the signal to the disk, the recorded recording signal is read out, and every time the recording signal reading operation is performed. A buffer RAM in which a recording signal output from a control device is sequentially written into an area from which the recording signal has been read, and when a recording signal recording operation is started, a recording signal reading operation from the buffer RAM is started, and the buffer is stored for a predetermined time. Since the write operation of the recording signal to the RAM for writing is not performed, the recording operation can be started normally by reading the same recording signal from the RAM for buffer again even if an abnormality occurs at the start of recording. .

Further, according to the present invention, in an optical disk recording / reproducing apparatus capable of performing a recording operation not only at a prescribed linear velocity but also at a high linear velocity, a re-recording operation is performed in response to a recording abnormality in a high-speed recording state. When the abnormality occurs again, the recording linear velocity is changed to the low speed side, so that the recording operation can be automatically changed to a state where the recording operation can be performed normally.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram showing an embodiment of an optical disk recording / reproducing apparatus according to the present invention.

FIG. 2 is a diagram for explaining the operation of the present invention.

[Explanation of symbols]

 Reference Signs List 1 disc 2 optical pickup 5 digital signal processing circuit 6 signal reproduction circuit 7 computer device 8 system control circuit 9 signal recording circuit 10 buffer RAM

Claims (4)

[Claims] An information data indicating a recording position of a data signal is recorded in a buffer area provided on a disk, and the information data recorded in the buffer area is read, and based on the read information data, In an optical disk recording / reproducing apparatus configured to perform a recording operation, a recording signal output from a control device is written, and a recording signal read operation performed during a signal recording operation on a disk is performed, and a recording signal is written. Buffer RA which is sequentially written in an area from which a recording signal output from the control device is read each time the read operation is performed.
M at the start of the recording operation of the recording signal.
An optical disk recording / reproducing apparatus, wherein an operation of reading a recording signal from an AM is started and an operation of writing a recording signal to the buffer RAM is not performed for a predetermined time. 2. When a recording error occurs at the start of recording of a recording signal on a disk, a recording signal not recorded due to the recording error is read from the buffer RAM and the signal is recorded again at the recording start position. 2. The optical disk recording / reproducing apparatus according to claim 1, wherein: 3. A write operation of a recording signal output from a control device to a buffer RAM when a recording operation of a recording signal on a disk is started normally. An optical disk recording / reproducing apparatus according to claim 1. 4. Information data indicating a recording position of a data signal, capable of performing a recording operation at a constant linear velocity and a high-speed recording operation at a high linear velocity which is several times higher than the prescribed linear velocity. In an optical disk recording / reproducing apparatus configured to record information in a buffer area provided on a disk, read information data recorded in the buffer area, and perform a recording operation based on the read information data. When a recording signal output from the control device is written, a read operation of the written recording signal is performed during a signal recording operation on the disc, and the recording signal is output from the control device every time the recording signal read operation is performed. Buffer RA to which recording signals are sequentially written
M, when a recording error occurs at the start of recording a recording signal on a disk, a recording signal that was not recorded due to the recording abnormality is read out from the buffer RAM, and the signal is recorded again at the recording start position, and re-recorded. An optical disc recording / reproducing apparatus characterized in that, when an abnormal operation occurs, the recording linear velocity of the disc is changed to a low speed side to perform a recording signal recording operation.