JP2000251258A - Optical disk recording/reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect a state where the recording operation of a signal cannot be properly made by rotation failure by reproducing and detecting a wobble signal at a position for recording a data signal, and by controlling the propriety of the recording operation according to the state of the signal to be reproduced. SOLUTION: A wobble signal being read from a signal-recording region where no signal is recorded is decoded for deriving a synchronization signal. When the unlocking of synchronization between the derived synchronization signal and a reference signal occurs within specific time, it is judged that the rotary control operation of a disk 1 is not properly made by the influence of eccentricity or the like. In this case, recording operation is not started for returning to a stop state, and at the same time a signal for indicating that the recording operation cannot be made is outputted to a computer device 7. The device 7 outputs an instruction signal for performing the chucking operation of the disk 1 again to a system control circuit 8. By carrying out the operation, an eccentricity state may be improved.

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, the type of the recorded signal, and the like is recorded in a lead-in area provided on the disc. The recording operation of the TOC data in the lead-in area is configured to be performed by repeatedly recording information data in a buffer area provided on the disc by a predetermined number of frames and reading the recorded information data. I have.

[0005] In such an optical disk recording and reproducing apparatus,
When recording a data signal in the signal recording area, especially when starting a signal recording operation at a constant high linear velocity, it may be affected by the eccentricity of the disk, and recording of the data signal due to abnormal rotation state. Operation may not be performed normally. In this case, there is a problem that not only the recording operation is interrupted but also the disk itself is disabled as a result of being processed as a disk error.

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

[0007]

According to the present invention, at the start of recording of a data signal, a wobble signal at a position where the data signal is recorded is reproduced and detected, and the propriety of a recording operation is controlled based on the state of the reproduced signal. It is like that.

[0008]

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.

The signal recording area of the disc includes a lead-in area T1 in which TOC data indicating a signal recording position and a type of a recorded signal is recorded, and a TOC data recorded in the lead-in area T1. Data signal recording areas C and D in which the recorded signals are recorded and a lead-out area L1 are formed, and these areas, that is, T1, C,
D and L1 will be formed as one session. When the next recording operation is performed on the disc recorded in this manner, the lead-in area T2 where the TOC data is recorded, and the TO-recording area recorded in the lead-in area T2.
Data signal recording areas E, F, and G in which signals corresponding to the C data are recorded, and a 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 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 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. 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 disc 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 the present 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 increased 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 the position at which the recording operation is 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 disk, 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 in the 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, an instruction 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. By performing such an operation, the recording operation of the first session including the lead-in area T1, the signal recording areas C and 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 the disk on which the first session is recorded, a laser output setting operation and an operation for 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 reading operation of 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.

When the recording operation is completed in this way, 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 the 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, the 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.

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 as the 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. Then, the TOC data is recorded in the lead-in area T3 and the lead-out area is set as described above, and the recording operation ends.

As described above, the operation of recording the data signal on the disk 1 is performed. Next, the operation for recording the 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 remaining recordable 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 remaining recordable 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 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 this embodiment is performed. Next, the recording operation permission / prohibition control operation, which is the gist of the present invention, will be described. As described above, the recording operation of the data signal output from the computer device 7 to each signal recording area is performed. However, when the optical pickup 2 moves to the recording start position of each signal recording area, first, the optical pickup 2 The signal read operation is performed with the value for performing the reproducing operation without increasing the laser output to the value for performing the recording operation.

Since no signal is recorded in the signal recording area, the signal read out in this case is a wobble signal, and the wobble signal is decoded to derive a synchronization signal. Then, the synchronization signal thus derived is compared with the reference signal output from the reference signal generation circuit,
It is determined whether the two signals are synchronized. This determination operation is performed for a predetermined time, and if no out-of-synchronization occurs for a predetermined time, it is determined that the rotation control operation of the disk 1 is normally performed. If it is determined to be normal,
The laser output of the optical pickup 2 is raised to a value for performing the recording operation, and the optical pickup 2 is returned to the recording start position of the signal recording area to start the signal recording operation.

When the synchronization between the synchronization signal and the reference signal is lost within a predetermined time, it is determined that the rotation control operation of the disk 1 is not performed normally due to the influence of eccentricity or the like. As described above, when it is determined that the rotation control operation is not performed normally, the recording operation is returned to the stop state without starting and the computer device 7 is in a state where the recording operation cannot be performed. Is output.

When a signal indicating that the recording operation cannot be performed is input to the computer device 7, a command signal for restarting the chucking operation of the disk 1 is output from the computer device 7 to the system control circuit 8. Is done. When such a signal is input to the system control circuit 8,
After the operation of moving the chucking member of the disk 1 to the non-chucking position and the operation of ejecting the disk 1 are performed once, the mounting operation on the turntable and the chucking operation are performed. By performing such an operation, the positional relationship between the disk 1 and the turntable becomes appropriate, and the eccentric state may be improved.

After performing such an operation, the above-described operation for recording is performed. If the synchronous relationship between the synchronization signal and the reference signal is maintained for a predetermined time, the signal recording operation is performed. . If the synchronization relationship between the synchronization signal and the reference signal is not maintained for a predetermined time despite performing such an operation, it is determined that the computer device 7 is in a state where the recording operation cannot be performed. Is output. When such a signal is input, the recording operation can be canceled. However, a command signal for restarting the chucking operation of the disk 1 is output to the system control circuit 8 again.
The above-described operation may be performed. And
It is also possible to configure so that the recording operation is canceled when the recording operation is performed a predetermined number of times.

The signal recording operation on the disk 1 is not performed at a constant low linear velocity but at a constant high linear velocity such as 2, 4, 6, or 8 times the prescribed linear velocity. In the case of an optical disc recording / reproducing apparatus configured to be able to perform a recording operation by using a wobble signal, the recording operation is performed when a recording operation is performed at a high speed, for example, a linear speed of 8 times. It is also possible to perform an operation of determining whether or not both the synchronization signal and the reference signal are synchronized for a predetermined time. In the optical disk recording / reproducing apparatus having such a function, the disk 1
If it is determined that the rotation of the disk 1 is abnormal, the linear velocity of the disk 1 may be sequentially changed to 6 times, 4 times, 2 times, and a prescribed speed to a lower speed side.

When the rotation of the disk 1 is controlled at a constant linear velocity, the rotation speed on the inner peripheral side is higher than that on the outer peripheral side of the disk 1. The use of the outer side is more affected by eccentricity than the case of using the outer peripheral side. Therefore, it is possible to perform the above-mentioned recording operation permission / prohibition operation only when a signal is recorded in a signal recording area on the inner peripheral side of a predetermined position of the disk 1.

[0051]

According to the present invention, at the start of recording of a data signal, a wobble signal at a position where the data signal is recorded is reproduced and detected, and the propriety of the recording operation is controlled according to the state of the reproduced signal. , It is possible to detect that the signal recording operation cannot be performed normally due to abnormal rotation. In addition, since the recording operation is determined using the wobble signal signal to be reproduced, even a disc determined to be abnormal can be used again.

According to the present invention, the chucking operation of the disk is performed again when it is determined that the recording operation is not possible. Therefore, when the cause of the impossibility of the recording operation is a defective chucking state of the disk, Can be returned to a recordable state.

According to the present invention, in the case of 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, the control of whether or not the recording operation is possible only at the time of the high-speed recording operation is performed. Since the control is performed, that is, the control of whether or not the recording operation is possible is performed only at the time of the control operation at a speed easily affected by the eccentricity, the recording operation can be performed efficiently.

Further, the present invention relates to an optical disk recording / reproducing apparatus capable of performing a recording operation not only at a specified linear velocity but also at a high linear velocity. Since the state is changed to the state, the state can be automatically changed to a state where the signal recording operation can be performed.

The present invention relates to 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. Is performed, the recording operation can be performed efficiently.

[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

Claims (6)

[Claims] After performing a data signal recording operation on a disc, information data indicating a recording position of the data signal is recorded in a buffer area provided on the disc, and the information data recorded in the buffer area is recorded. reading,
In an optical disc recording / reproducing apparatus configured to record TOC data of a data signal recorded based on the read information data in a lead-in area, a position where the data signal is recorded when recording of the data signal is started An optical disk recording / reproducing apparatus characterized in that the wobble signal is detected for reproduction in (1) and the recording operation is controlled depending on the state of the reproduced signal. 2. The optical disk recording / reproducing apparatus according to claim 1, wherein whether or not a recording operation is possible is controlled based on whether or not a synchronization signal obtained from a wobble signal is synchronized with a reference signal. 3. The optical disk recording / reproducing apparatus according to claim 1, wherein when it is determined that the recording operation is impossible, the disk chucking operation is performed again. 4. An optical disk recording / reproducing apparatus capable of performing a recording operation at a constant linear velocity and a recording operation at a high linear velocity which is several times higher than the prescribed linear velocity. 2. The optical disk recording / reproducing apparatus according to claim 1, wherein whether or not a recording operation is performed is controlled only during operation. 5. The optical disk recording / reproducing apparatus according to claim 4, wherein whether or not the recording operation is performed is controlled only when the recording position is on the inner side of the predetermined position. 6. The optical disk recording / reproducing apparatus according to claim 4, wherein when it is determined that the recording operation is not possible, the recording linear velocity is changed to a lower speed side.