JP2002367285A - Record control method for optical disk recording and playing-back device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk recording and playing-back device in which a signal can be recorded in a disk by a laser beam emitted from an optical pickup. SOLUTION: In an optical disk recording and playing-back device constituted so that a signal outputted from a host device is stored in a RAM 10 for buffer with a block unit together with a synchronizing signal and a header signal, while the signal is recorded in a disk 1 by reading out the signal stored in the RAM 10 for buffer, a synchronizing signal, a header signal and fixed data are generated by a system control circuit 8 incorporated in an optical disk recording and playing-back device, and each data is written in a storage region of a block unit provided in the RAM 10 for buffer.

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] Recently, for a specified linear velocity,
A structure that can record signals such as program software while controlling the rotation of the disk at high linear speeds such as 2x, 4x, 6x, 8x, 10x, 12x and 16x An optical disk recording / reproducing apparatus has been developed.

[0004]

The optical disk recording / reproducing apparatus is configured to perform a signal recording operation in accordance with a recording command from a computer device as a host device. Is temporarily stored in a buffer RAM, and a signal stored in the buffer RAM is read to perform a signal recording operation on a disk.

In a state where the signal recording operation to the disk is normally performed, the recording signal output from the computer device is written to the buffer RAM, the signal is read from the buffer RAM, and the read operation is performed. The operation of recording the output signal on the disk is performed according to the amount of the recording signal and the state of recording on the disk. The recording operation of the signal on the disk is configured to be started based on a recording command signal output from the computer device and to be ended based on a recording end command signal.

In such an optical disk recording / reproducing apparatus, a recording signal is written to a buffer RAM for each block, and a signal stored in the buffer RAM is read for each block to record on a disk. Have been. The write operation of the recording signal to the buffer RAM is determined by a standard after writing a synchronization signal, a header signal, and fixed data generated by a control circuit incorporated in the optical disk recording / reproducing apparatus for each block, and then. It is configured to perform an operation of overwriting the existing data, for example, a manufacturer identification code or the like, on a portion of fixed data that has already been written.

In the writing operation to the buffer RAM, a processing operation of recording a synchronization signal and a header signal and then overwriting fixed data is performed.
There is a problem that the signal processing time becomes longer, and as a result, it is not possible to cope with an increase in the recording speed on the disc.

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

[0009]

According to the present invention, a signal output from a host device is stored in a buffer RAM together with a synchronizing signal and a header signal in block units, and the signal stored in the buffer RAM is read out so that the signal is transmitted to a disk. In an optical disc recording / reproducing apparatus configured to record, a synchronization signal, a header signal, and fixed data are created by a system control circuit incorporated in the optical disc recording / reproducing apparatus, and each data is provided in the buffer RAM. In this case, the data is written in a storage area in units of blocks.

[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.
It is explanatory drawing of AM. 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. . 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. The optical pickup is incorporated therein, and its main body is moved in the radial direction of the disk 1 by a pickup feed motor (not shown).

Reference numeral 3 denotes an RF signal amplifying 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 amplifying circuit 3. A pickup control circuit for performing a focusing control operation for focusing a light beam of the optical pickup 2 on a signal surface of the disk 1 and a tracking control operation for causing the light beam to follow a signal track on the signal surface based on the focus servo. A circuit and a tracking servo circuit are incorporated.

Reference numeral 5 denotes a digital signal processing circuit which 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 disk 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 signal is a data signal such as computer software. Has a function of outputting a digital signal as it is to the computer device 7 provided as a host device.

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 in which a signal recorded on the disk 1 is temporarily stored, in which a signal output from the computer device 7 and data generated and output from the system control circuit 8 are written and a system control signal is written. The control operation of the circuit 8 controls a signal storage operation and a signal read operation. 11
Is a pickup feed motor drive circuit whose operation is controlled by the system control circuit 8, and is configured to drive the pickup feed motor based on a signal obtained from the pickup control circuit 4.

In such a configuration, during the operation of recording a signal on the disk 1, the buffer RAM 10 stores fixed data such as a synchronization signal, a header signal, and a manufacturer identification code generated for each block by the system control circuit 8. The data signal output from the computer device 7 is written in block units, and the read operation of the stored signal is controlled to control the signal recording operation on the disk 1. In the present invention, the system control circuit 8 generates a plurality of blocks of data signals, and outputs a predetermined number of blocks of data signals from the plurality of blocks of data signals to the buffer RAM 1.
It is configured to write data corresponding to each block provided in 0.

The operation of recording a signal on the disk 1 is as follows.
The recording operation is started based on a recording command signal output from the computer device 7, and is terminated based on a recording end command signal output after the output of the signal to be recorded. When such an operation is performed, a data signal necessary for reading a signal recorded on the disk 1 and a data signal necessary for performing the next recording operation are in a special area provided on the disk 1. An operation for recording in the buffer area is performed, and a signal indicating that the recording operation has been normally performed is output to the computer device 7.

The above-described recording end operation is performed when the signal recording operation is continuously performed. When the recording operation is temporarily stopped, the recording operation is performed on the disk 1 by the control operation of the system control circuit 8. The recording operation is completed by recording the recording information data in the lead-in area.

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 reproduction operation is started, the rotation control operation of the spindle motor is performed by the spindle motor drive 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 reading operation of the signal from the disk 1 is started, but before the reproducing operation, the reading operation of the recording information data recorded in the lead-in area constituting the first session of the disk 1, that is, the TOC data is performed.

The reading and reproducing operation of the signal recorded in the signal recording area of the first session provided on the disc 1 is performed based on the TOC data recorded in the lead-in area. The signal read by the optical pickup 2 is amplified and shaped by an RF signal amplifying circuit 3 and then input to a digital signal processing circuit 5 where the signal is demodulated. 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 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 applied to the laser diode. Set to be supplied. When such a laser output setting operation is performed, an operation of reading recording information data recorded in the buffer area of the disk 1, that is, position information of a signal recorded in the program area, and the like is performed.

Based on the record information data read in this way, whether a recording operation of a data signal is possible in a program area provided on the disk 1 and a position where the recording operation is performed are determined. A recognition operation is performed.

When the recognition processing operation is completed, the optical pickup 2 is moved to a position at which the recording operation on the disk 1 is started by the drive control operation of the pickup feed motor by the pickup feed motor drive circuit 11 and will be described later. An operation of writing a recording signal to the buffer RAM 10 is performed. RA for the buffer
When the operation of writing a signal to M10 is performed, the storage amount of the signal stored in the buffer RAM 10 gradually increases. When the storage amount exceeds a predetermined amount, the signal stored in the buffer RAM 10 is read out,
The read signal is input to the signal recording circuit 9. As a result, the control operation of the laser drive circuit by the signal recording circuit 9 is performed, and a signal is recorded on the disk 1.

By such an operation, a signal recording operation to the disk 1 is performed, but a signal writing operation to the buffer RAM 10 is performed according to a signal reading operation from the buffer RAM 10. Have been. In the operation of writing a signal to the buffer RAM 10, when a signal read operation is performed, an operation of newly writing a signal at a position where the read signal is stored is repeatedly performed.

The above-described signal recording operation on the disk 1 is performed based on a recording command signal output from the computer device 7, and is recorded by the computer device 7 after the last recording signal is output from the computer device 7. Will be output. When such a recording command signal is output, a recording operation of information data is performed on the buffer area of the disk 1 and a signal indicating that the recording operation has been normally performed is output to the computer device 7 and a series of signals is output. Is completed.

The above-mentioned recording operation is performed using recording information data recorded in a buffer area provided on the disk 1.
This is an operation when the session of the signal recorded in the program area is not closed, that is, when the recording operation is performed intermittently without temporarily ending the recording operation.

If the disc inserted for performing the signal recording operation is a disk for which the recording operation has been once completed, that is, a disk in which the session is closed, the TOC is called a TOC in the lead-in area of the disk 1. Recording information data is recorded, and the recording information data is read to start a recording operation of a new signal. In such a case, the recording operation start and the recording end operation are performed as described above, and the description thereof will be omitted.

As described above, the reproducing and recording operations in this embodiment are performed. Next, the operation of controlling the writing and reading of signals to and from the buffer RAM 10 according to the present invention will be described with reference to FIG. .

In FIG. 2, reference numerals A, B, C, and D denote storage areas provided in the buffer RAM 10 for each block, and storage areas A1, B1, C1 for synchronization signals into which synchronization signal data is written, respectively. , D1 and header signal storage areas A2, B2, and C in which header signal data is written.
2, D2 and fixed data storage areas A3, B3, C3 and D3 to which fixed data is written.

In such a configuration, the buffer RAM 1
The operation of writing a signal to 0 is performed by the system control circuit 8.
Synchronization signals generated for a plurality of blocks, a header signal, fixed data such as a manufacturer identification code, and data signals output from the computer device 7 are stored in each corresponding block. B1,
C1, D1 to header signal storage areas A2, B2, C
2, D2 and fixed data storage areas A3, B3, C
3, by writing to D3 ~. And
In the present invention, the synchronization signal, the header signal, the manufacturer identification code generated by the system control circuit 8 and the data signal output from the computer device 7 are plural, for example, 10
Blocks are generated, and each block of data is written into each corresponding block. When such a write operation is performed, an operation of writing the remaining five blocks of data into each corresponding block is performed.

By the operation described above, the buffer RAM 1
0 is performed, but the buffer RAM 1
0 by reading data written in each of the storage areas A, B, C, D,.
The recording operation of the signal to the. A process of performing a write operation for each data in a plurality of blocks in each storage area provided in the buffer RAM 10 while a read operation is performed for each block in order to perform a recording operation on the disk 1. The operation will be repeated.

In this embodiment, the system control circuit 8 generates data signals for 10 blocks, and the data signals for 5 blocks in the generated data signals for 10 blocks are stored in the buffer RAM 10 corresponding to the respective blocks. It was written in blocks, but the number of processed blocks was
The number of blocks is not limited, and is set on the basis of the signal recording speed to the system and the signal processing speed of the system control circuit 8.

[0036]

According to the present invention, a signal output from a host device is stored in a buffer RAM together with a synchronization signal and a header signal in block units, and the buffer RAM
An optical disk recording / reproducing apparatus configured to record the signal on a disk by reading the signal stored in the optical disk, a system control circuit incorporated in the optical disk recording / reproducing apparatus includes a synchronization signal, a header signal, and fixed data. And write each data to the block-based storage area provided in the buffer RAM, so that the processing time for writing the signal to the buffer RAM can be shortened, and as a result, This is very effective for increasing the recording speed.

Further, according to the present invention, the system control circuit creates data consisting of a synchronization signal, a header signal and fixed data for a plurality of blocks, and stores the data for the plurality of blocks in each block provided in the buffer RAM. Since the data is written in the storage area, there is an advantage that the processing time can be further reduced as compared with the case where processing is performed for each block.

[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 an explanatory diagram of a buffer RAM according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 disc 2 optical pickup 4 pickup control circuit 5 digital signal processing circuit 7 computer device 8 system control circuit 10 buffer RAM

Claims (2)

[Claims] 1. A buffer RA together with a synchronization signal and a header signal output from a host device in units of blocks.
In an optical disc recording / reproducing apparatus configured to record the signal on a disc by reading the signal stored in the buffer RAM and reading the signal stored in the buffer RAM, a system control circuit incorporated in the optical disc recording / reproducing apparatus A synchronization signal, a header signal, and fixed data, and writing each data to a block-based storage area provided in the buffer RAM. 2. A system control circuit creates data comprising a synchronization signal, a header signal and fixed data for a plurality of blocks, and writes the data for a plurality of blocks into a storage area of each block provided in the buffer RAM. 2. The recording control method according to claim 1, wherein: