JP2000251261A - Optical disc recording/playback apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correctly read recording signals along with a data recording operation from a computer, even if a failure occurs during the recording operation of TOC data and readout data in an optical disc recording/playback apparatus. SOLUTION: When a failure occurs during the recording operation of TOC data and readout data in a high speed recording operation, the recording line speed is changed from a high speed to a low speed, and the TOC data are recorded. When a failure occurs during the recording operation of the readout data in the high speed recording operation, the recording line speed is changed from a high speed to a low speed, and the readout data are recorded.

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 recent years, it has been difficult to record a signal while controlling the rotation of the disk at a constant high linear velocity of 2 times, 4 times, 6 times, and 8 times the prescribed recording linear velocity. An optical disk recording / reproducing device configured to be capable of being developed has been developed.

[0004]

An optical disc recording / reproducing apparatus called a write-once type is configured to perform a signal recording operation in accordance with a recording command from a host. When the recording operation is completed, the signal is recorded. The TOC data indicating the recording position and the type of the recorded signal is recorded in the lead-in area provided on the disc, and the lead-out data indicating the type of the recorded signal is recorded in the lead-out area. Have been. In the operation of recording the TOC data in the lead-in area and the operation of recording the lead-out data in the lead-out area, information data is repeatedly recorded in a buffer area provided on the disc by a predetermined number of frames, and the recorded data is recorded. It is configured to read information data.

[0005] In such an optical disk recording and reproducing apparatus,
When TOC data, lead-out data, and data signals are recorded at a constant high linear velocity, the recording may be affected by the eccentricity of the disk, and the recording operation of each signal cannot be performed normally due to abnormal rotation. There is. In the optical disc recording / reproducing apparatus, when the recording operation of the data signal is completed, the recording operation is completed by performing the recording operation of the TOC data in the lead-in area and the recording operation of the lead-out data in the lead-out area. Become.

In such an optical disk recording / reproducing apparatus,
If an abnormality occurs during the recording operation of the TOC data or the lead-out data, the recording signal cannot be read even though the recording operation of the data signal obtained from the computer device has been performed normally. Processing is performed when the operation is performed.

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

[0008]

According to the present invention, when an abnormality occurs during the TOC data recording operation during a high-speed recording operation, the recording linear speed is changed to a lower speed side, and then the TOC data recording operation is performed. It was made.

Further, according to the present invention, when an abnormality occurs during the operation of recording the lead-out data during the high-speed recording operation, the recording operation of the lead-out data is performed after changing the recording linear velocity to a lower speed side. Things.

[0010]

FIG. 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 showing a recording format of a disk.

First, a recording format on a disk will be described with reference to FIG. On the disc, a test writing area A where a test signal is recorded when adjusting the recording laser output from the inner peripheral side, and information data indicating a signal recording position every time the recording operation of the data signal is completed is recorded. A buffer area B is provided, and a signal recording area for recording a signal is provided on the outer peripheral side of the buffer area B.

In a signal recording area of the disc, a lead-in area T1 in which TOC data indicating a signal recording position and a type of the recorded signal, that is, an audio signal or a signal for a computer, is recorded. Data signal recording areas C and D in which signals corresponding to the TOC data recorded in the lead-in area T1 are recorded, and a lead-out area L1 in which lead-out data indicating the type of the recorded signal is recorded. Formed these areas,
That is, T1, C, D and L1 are formed as one session. When the next recording operation is performed on the disk recorded in this manner, a lead-in area T2 where TOC data is recorded, and a signal corresponding to the TOC data recorded in the lead-in area T2 are recorded. The data signal recording areas E, F, and G and the lead-out area L2 are formed. Hereinafter, the data signal is recorded on the disk with the same configuration.

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 amplification circuit for amplifying an RF signal obtained from a photodetector incorporated in the optical pickup 2 and shaping the waveform, and 4 denotes a signal obtained through the RF signal amplification 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 the signal output from the RF signal amplifier circuit 3 and performs a demodulation operation 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 buffer RAM for storing information data indicating a recording position of a data signal when a data signal recording operation is performed on a signal recording area provided on the disk 1.

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 operation of reading a signal from the disk 1 is started, but prior to the reproducing operation, the TO recorded on the lead-in area T1 constituting the first session of the disk 1
A read operation of C data is performed.

The operation of reading and reproducing the data signal recorded in the signal recording area of the first session of the disk 1 is performed based on the TOC data recorded in the lead-in area T1. The signal read by the optical pickup 2 is applied to an RF signal amplifier circuit 3
After being amplified and waveform-shaped, the signal is input to the digital signal processing circuit 5 to perform a signal demodulation operation. 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. The reproducing operation is performed by the TO operation recorded in the lead-in area T1.
Since it is performed based on the C data, the reproduced signal is
This is recorded in the data signal recording areas C and D constituting the first session. Similarly, the TOC recorded in the lead-in area T2 constituting the next session
By reading the data, it is possible to perform the operation of reproducing the signals recorded in the data signal recording areas E, F and G in which the signals corresponding to the TOC data are recorded.

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 A provided on the disk 1 so that a drive current at which an optimum laser output for the recording operation is obtained is obtained by a laser diode. Is set to be supplied to When the laser output setting operation is performed, an operation of reading information data recorded in the buffer area B, that is, position information of a signal recorded in the 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. First, a case where a disc performs a recognition operation but has no data signal recorded thereon will be described.

In the case of such a disc, a signal is recorded from a predetermined position provided on the outer peripheral side of the buffer area B. However, the recording operation of the data signal is performed by setting a predetermined lead-in area T1. And started from the outer periphery side. In this manner, the recording operation is started. When a recording operation for one data is performed on the signal recording area C, information data indicating a position where the data signal is recorded is stored in the buffer RAM 10. Is done. The information data stored in the buffer RAM 10 is repeatedly recorded a predetermined number of times in a buffer area B provided on the disk 1.

Thus, the recording operation of the data signal for the signal recording area C is completed.
When a command for recording a next data signal is issued, an operation of reading information data recorded in the buffer area B is performed. The position where the next data signal is recorded, that is, the position of the track following the signal recording area C can be recognized based on the information data read in this way.

When the data signal to be recorded is input to the signal recording circuit 9 after the recognition operation is performed, the data signal is recorded in the signal recording area D as described above. When this operation is completed, the operation of storing information data in the buffer RAM 10 and the operation of recording information in the buffer area B are performed as described above.

When the recording operation of the data signal in the signal recording area D is completed, a command signal for terminating the recording operation using the data signals recorded in the signal recording areas C and D as one session is output from the computer device 7. Then, the read operation of the data signals recorded in the signal recording areas C and D is performed, the type of the recorded data signal, the information data indicating the recording position, and the lead-out area L1
The operation of recording the TOC data such as the position information in the lead-in area T1 is performed. When the operation of recording the TOC data in the lead-in area T1 is completed, lead-out data, which is a signal indicating whether the recorded data signal is an audio signal or a signal for a computer, is recorded in the lead-out area L1. Is performed. By performing such an operation, the lead-in area T1, the signal recording area C,
The recording operation of the first session including D and the lead-out area L1 ends.

The recording operation on the disk 1 on which no data signal is recorded is performed as described above. Next, the case where the recording operation is performed using the disk on which the first session is recorded will be described.

When an operation for starting a recording operation is performed using a disk on which the first session is recorded, a laser output setting operation and an operation of recognizing information recorded on the disk are performed. Such an operation is performed in the buffer area B
By reading the information data recorded on the disc, it is possible to recognize that the disc is a disc on which a data signal is recorded, and it is possible to recognize the position of the lead-in area T1 based on the information data.

When the position of the lead-in area T1 is recognized, the light beam of the optical pickup 2 is moved to the lead-in area T1, and the operation of reading the TOC data recorded in the lead-in area T1 is performed. Such TOC
By reading the data, the position of the lead-out area L1 can be recognized. Therefore, it becomes possible to recognize the start position of recording a new data signal, and the above-described recording operation is started from outside the lead-out area L1. By performing such a recording operation, the recording operation of the next session including the lead-in area T2, the signal recording areas E, F, G, and the lead-out area L2 ends.

The operation when the recording operation of each session ends is performed as described above. Next, the operation when the recording operation is ended without ending one session will be described. Such an operation is performed when a signal recording area constituting the same session is formed following the signal recording area recorded last. That is, such a recording operation is performed, for example, by ending the recording operation without recording the TOC data in the lead-in area T3.

For example, an operation in the case where the data signal is recorded only in the signal recording area H outside the lead-in area T3 and then the recording operation is terminated will be described. Signal recording area H
When the data signal is recorded in the buffer RAM 10, the information data indicating the recording position is stored in the buffer RAM 10 and the information data stored in the buffer RAM 10 is recorded in the buffer area B provided on the disk 1 as described above. Is done. After such a recording operation is performed, the recording operation is ended by the control operation of the computer device 7.

As described above, when the recording operation is completed, no TOC data is recorded in the lead-in area T3. When an operation of starting the recording operation of the next data signal is performed using such a disk, the operation of setting the laser output and the operation of recognizing the information recorded on the disk are performed as described above.

In such an operation, by reading out the information data recorded in the buffer area B, it is recognized that the disc is a disc in which a data signal is recorded, and the information data is used to determine the position of the lead-in area T3. Can be recognized.

When the position of the lead-in area T3 is recognized, the operation of moving the light beam of the optical pickup 2 to the lead-in area T3 and reading out the TOC data recorded in the lead-in area T3 is performed. Is done,
In this case, since the TOC data is not recorded in the lead-in area T3, the TOC data cannot be read. Since such TOC data read operation is not performed, it can be recognized that the recording operation for ending the session has not been performed.

In this case, a position where the next data signal is recorded from the information data indicating the position where the signal recording area H is recorded in the information data recorded in the buffer area B, that is, the signal recording area H The position of the following track can be recognized.

After the recognition operation is performed, when a data signal to be recorded is input to the signal recording circuit 9, the data signal is recorded as a signal recording area I on the outer peripheral side of the signal recording area H as described above. However, when the operation is completed, the operation of storing the information data in the buffer RAM 10 and the operation of recording the information in the buffer area B are performed as described above. As described above, the signal recording operation is performed in the case of using the disc in which the TOC data is not recorded in the lead-in area T3, but the command signal for ending the recording operation of the session including the signal recording areas H and I is issued by the computer device 7. As a result, as described above, the TOC data is recorded in the lead-in area T3, the lead-out area is set, and the operation of recording the lead-out data in the set lead-out area is performed. The session recording operation ends.

As described above, the operation of recording a data signal on the disk 1 is performed. Next, the operation for recording TOC data in the lead-in area will be described.

When ending the recording operation of the first session, the TOC is stored in the lead-in area T1 as described above.
A processing operation of recording data, that is, the type of data signals recorded in the signal recording areas C and D, information data indicating the recording position thereof, and information data indicating the position of the lead-out area L1 is performed. Is performed, a signal recordable area on the outer peripheral side of the lead-out area L1, that is, an operation of detecting a recordable remaining amount is performed.

The operation of detecting the recordable remaining amount can be easily performed by calculating based on the recording capacity of the disk 1 and the position information of the lead-out area L1.
Then, the detected remaining recordable amount is a predetermined amount, for example, TO
It is determined whether or not there is a lead-in area for writing the C data, a lead-out area of a predetermined length, and a capacity that can provide the minimum number of tracks that must be provided for recording the data signal.

When it is determined that the recordable remaining amount is a predetermined amount by such a determination operation, normal TOC data is recorded in the lead-in area T1. Therefore,
The recording operation of the next session can be performed as described above. Conversely, if it is determined by the determination operation that the recordable remaining amount is not the predetermined amount, that is, is determined to be smaller than the predetermined amount,
In the lead-in area T1, normal TOC data, that is, the type of data signal recorded in the signal recording areas C and D, information data indicating its recording position, and information data indicating the position of the lead-out area L1, and the following: Non-recordable data for prohibiting the recording operation is recorded.

When such non-recordable data is recorded, non-recordable data in the TOC data recorded in the lead-in area T1 is read out when the next recording operation is performed. It is possible to recognize that the disc cannot perform a recording operation. Therefore, when such non-recordable data is read, the recording operation cannot be performed so that useless recording operation can be prevented from being performed. The processing operation can be prevented from being performed.

As described above, the signal recording operation in the present embodiment is performed. Next, the operation when an abnormality occurs during the operation of recording the TOC data in the lead-in area in the high-speed recording state will be described. .

As described above, when the command signal for ending the session recording is output from the computer device 7,
After performing the recording operation of the data signal in each signal recording area, T
The operation of recording the OC data in the lead-in area is performed, and the operation of recording the TOC data in the lead-in area is repeatedly performed. If the rotational state of the disk 1 becomes unstable due to the eccentricity of the disk 1 during the recording operation of the TOC data, the focus servo of the optical pickup 2, the tracking servo, or the servo of the spindle motor is performed. An error occurs and the recording operation cannot be performed normally. In such a state, an operation of temporarily stopping the recording operation of the TOC data in the lead-in area and changing the rotation speed of the disk 1 to a lower speed is performed.

When the rotational speed of the disk 1 is changed to a low speed side by such a control operation, the vibration of the disk 1 is stopped, so that the rotational characteristics of the disk 1 are improved, and the disk 1 is kept at a constant low linear velocity. It is in a state where the rotation drive is controlled. In addition, since the servo characteristics of the optical pickup 2 are also improved, a state where focus servo and tracking servo operations are performed normally is achieved. When the signal recording / reproducing operation of the optical pickup 2 of the optical disk recording / reproducing apparatus and the rotation control operation of the spindle motor are normally performed, the temporarily suspended recording operation of the TOC data in the lead-in area is resumed, The TOC data is repeatedly recorded in the lead-in area a predetermined number of times.

As described above, in the high-speed recording state, the operation is performed when an abnormality occurs during the operation of recording the TOC data in the lead-in area. The operation when an abnormality occurs during the out data recording operation will be described.

As described above, when the command signal for ending the session recording is output from the computer device 7,
The recording operation of the data signal in each signal recording area and the recording operation of the TOC data in the lead-in area are performed. After the recording operation is completed, the recording operation of the lead-out data in the lead-out area is repeatedly performed. If the rotational state of the disk 1 becomes unstable due to eccentricity of the disk 1 during the recording operation of the lead-out data, the focus servo of the optical pickup 2
The servo of the tracking servo or the spindle motor becomes abnormal and the recording operation cannot be performed normally.
In such a state, an operation of temporarily stopping the operation of recording the lead-out data in the lead-out area and changing the rotation speed of the disk 1 to a lower speed is performed.

When the rotation speed of the disk 1 is changed to a low speed side by such a control operation, the vibration of the disk 1 is stopped, so that the rotation characteristics of the disk 1 are improved, and the disk 1 is maintained at a low linear speed. It is in a state where the rotation drive is controlled. In addition, since the servo characteristics of the optical pickup 2 are also improved, a state where focus servo and tracking servo operations are performed normally is achieved. When the recording / reproducing operation of the signal of the optical pickup 2 and the rotation control operation of the spindle motor of the optical disk recording / reproducing apparatus are performed normally, the temporarily stopped recording operation of the lead-out data in the lead-out area is resumed. The lead-out data is repeatedly recorded in the lead-out area a predetermined number of times.

[0052]

As described above, according to the present invention, the TO
If an abnormality occurs during the C data recording operation, the recording linear velocity is changed to a lower speed side, and then the TOC data recording operation is performed. Therefore, the TOC data can be reliably recorded in the lead-in area. As a result, according to the present invention, it is possible to ensure that the data signal recorded on the disk by the high-speed recording operation can be read out by the reproducing operation.

Further, according to the present invention, when an abnormality occurs during the recording operation of the lead-out data during the high-speed recording operation, the recording operation of the lead-out data is performed after changing the recording linear velocity to the low speed side. , The lead-out data can be reliably recorded in the lead-out area,
As a result, according to the present invention, it is possible to ensure that the data signal recorded on the disk by the high-speed recording operation can be read out by the reproducing operation.

In the present invention, the abnormality detection at the time of the recording operation is performed by detecting the servo abnormality. Therefore, there is an advantage that no special detecting means is required and the configuration is simplified. I have.

[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 showing a recording format of a disc.

[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

 ──────────────────────────────────────────────────続 き Continued on front page F term (reference) 5D090 AA01 BB04 CC01 CC04 CC16 DD03 DD05 FF01 FF30 FF36 GG29 HH03 JJ03 LL07 5D110 AA14 AA16 AA27 BC11 5D118 AA13 AA27 BA01 BB02 BD02 BF02 BF03 CA21 CB01 CC12 CD

Claims (3)

[Claims] 1. A recording operation with a constant linear velocity and a high-speed recording operation with a constant high linear velocity which is several times the prescribed linear velocity, and a recording operation of a data signal on a disk. After that, information data indicating the recording position of the data signal is recorded in a buffer area provided on the disk, and the information data recorded in the buffer area is read, and the information data is recorded based on the read information data. In the optical disc recording / reproducing apparatus configured to record the TOC data of the read data signal in the lead-in area, when an abnormality occurs during the recording operation of the TOC data during the high-speed recording operation, the recording linear velocity is changed to the low-speed side. An optical disc recording / reproducing apparatus characterized in that the recording operation of the TOC data is performed later. 2. A recording operation at a constant linear velocity and a high-speed recording operation at a constant high linear velocity which is several times higher than the prescribed linear velocity, and a recording operation of a data signal on a disk can be performed. After that, information data indicating the recording position of the data signal is recorded in a buffer area provided on the disk, and the information data recorded in the buffer area is read, and the information data is recorded based on the read information data. An optical disc recording / reproducing apparatus configured to record the TOC data of the read data signal in the lead-in area and then record the lead-out data in the lead-out area causes an error in the recording operation of the lead-out data during the high-speed recording operation. In this case, the recording operation of the lead-out data is performed after the recording linear velocity is changed to a low speed side. Optical disk recording / reproducing device. 3. The optical disk recording / reproducing apparatus according to claim 1, wherein an abnormality in the recording operation is determined by detecting an abnormality in the servo.