JP2004265530A - Recording control method of optical disk recording and reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording control method of an optical disk recording and reproducing device which records a signal in a disk. <P>SOLUTION: In this recording control method of an optical disk recording and reproducing device, there is provided with a memory 15A for buffer in which a record data signal outputted from a host device is stored, while a read out record data signal is encode-processed and recorded in a disk, and a memory 15B for encoding in which the record data signal read out from the memory 15A for buffer and encoded is stored, when recording operation is interrupted due to insufficiency of record data stored in the memory 15A for buffer and a record instruction signal is being received, receiving operation of all record data signals accompanying the record instruction signal is performed. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an optical disk recording / reproducing apparatus capable of recording a signal on a disk by a laser irradiated from an optical pickup.
[0002]
[Prior art]
2. Description of the Related Art Disk players that read signals recorded on a disk using an optical pickup have become widespread, but recently, in addition to a reproducing function, a signal is recorded on the disk by a laser emitted from the optical pickup. An optical disk recording / reproducing device configured to perform such operations has been commercialized.
[0003]
As an optical disk recording / reproducing device, there is an optical disk recording / reproducing device which is used by being connected to a computer device which is a host device. Such a device is configured to record recording data on a disk based on a command signal output from a computer device, and to perform a recording operation on the disk at a speed higher than a prescribed speed. Have been.
[0004]
Also, an optical disk recording / reproducing apparatus that performs a recording operation using a disk called a DVD has been commercialized. In such an apparatus, in such an apparatus, a predetermined recording unit called an ECC (Error Correcting Cord) block is used. It is configured to record a signal on a disk (for example, see Patent Document 1).
[0005]
[Patent Document 1]
JP, 2002-313027, A
[Problems to be solved by the invention]
In order to record the recording data output from the computer device on the disk, it is necessary that the recording data be continuously output from the computer device to the optical disk recording / reproducing device. Such an optical disk recording / reproducing apparatus includes a memory called a buffer for temporarily storing recording data output from a computer device. By reading the recording data stored in the buffer memory, the recording data is recorded on a disk. Is configured to be recorded.
[0007]
In such an optical disc recording / reproducing apparatus, when the supply of the recording data output from the computer device is delayed, a situation occurs in which the next recording data to be recorded in the buffer memory becomes insufficient, a situation called a so-called buffer underrun occurs. I do. In such a situation, there is a problem that the encoding process, that is, the interleaving process, for the recording data cannot be performed, and the recording operation on the disc cannot be performed.
[0008]
When such a buffer underrun state occurs, a technique has been developed in which the recording operation is temporarily suspended, and when the amount of recording data stored in the buffer memory increases, the recording operation is restarted from the recording interruption position. Optical disk recording and reproducing apparatus.
[0009]
In an optical disk recording / reproducing apparatus using a disk called a DVD, as described above, a signal is recorded in one block unit called an ECC, and this ECC is composed of 16 sectors. When a buffer underrun state occurs during the recording operation, the recording operation on the disc is interrupted and the receiving operation of the signal output from the computer device is temporarily stopped.
[0010]
A recording data signal transmitted together with a recording command signal from a computer device may be a signal of, for example, 20 sectors instead of a signal of 1 ECC unit, that is, a signal of 16 sectors. When the reception operation is stopped when a recording data signal of 1 ECC, which is a recording unit, is received while receiving such a signal, a signal indicating that the recording data has been received is transmitted from the optical disc recording / reproducing apparatus side to the computer apparatus. Therefore, there is a problem that the computer device determines that the abnormal processing has been performed and cannot perform the subsequent arithmetic processing.
[0011]
An object of the present invention is to provide a recording control method of an optical disk recording / reproducing apparatus which can solve such a problem.
[0012]
[Action]
The present invention relates to an optical disk recording / reproducing apparatus configured to perform a recording operation of a recording data signal on a disk in a predetermined recording unit based on a recording command signal output from a host device, wherein the recording data signal is output from the host device. A buffer memory in which a recording data signal is stored and read out and the recording data signal is encoded and recorded on a disk, and an encoding memory in which a recording data signal read out from the buffer memory and encoded is stored. When a recording operation is interrupted due to a shortage of recording data stored in the buffer memory, when a recording command signal is being received, all of the recording data signals accompanying the recording command signal are provided. It is configured to perform a receiving operation.
[0013]
【Example】
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 for explaining the operation of the present invention.
[0014]
In FIG. 1, reference numeral 1 denotes a disk mounted on a turntable 3 driven to rotate by a spindle motor 2, and is configured to be driven to rotate by rotation of the turntable 3. Also. Position information data is recorded on the disk 1 by a groove called a pre-groove, and a signal recording / reproducing operation is performed based on a wobble signal obtained from the groove.
[0015]
Reference numeral 4 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 is provided. This is an optical pickup incorporated therein, and is configured to be moved in the radial direction of the disk 1 by a pickup feed motor (not shown).
[0016]
5 is an RF signal amplifying circuit for amplifying an RF signal obtained from a photodetector incorporated in the optical pickup 4 and shaping the waveform, and 6 is an optical pickup based on the signal obtained from the optical pickup 4. The pickup control circuit performs a focusing control operation for focusing the light beam No. 4 on the 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, and includes a servo circuit.
[0017]
Reference numeral 7 denotes a digital signal processing circuit that performs digital signal processing of a signal output from the RF signal amplifying circuit 5 and demodulates various signals. Reference numeral 8 denotes an input of a digital signal processed by the digital signal processing circuit 7. This is a signal reproducing circuit which outputs a signal to a computer device 10 provided as a host via the interface 9.
[0018]
Reference numeral 11 denotes a system control circuit that receives a signal demodulated by the digital signal processing circuit 7 and performs various control operations in accordance with a command signal output from the computer device 10. A signal recording unit 12 receives a recording signal such as a test signal or an information signal, encodes the signal, controls a laser irradiation operation by a laser driving circuit 13, and records a recording data signal or the like on the disk 1. Circuit.
[0019]
Reference numeral 14 denotes a spindle motor drive circuit for driving the spindle motor 2 to rotate, and is configured to drive the disk 1 at a desired rotation speed. The rotational speed of the disk 1 is configured to be able to be driven not only at a prescribed speed but also several times and several tens times higher than the prescribed speed.
[0020]
A memory circuit 15 is a buffer memory 15A in which a recording data signal output from the computer device 10 is temporarily stored, and a recording data signal read from the buffer memory 15A during a recording operation is encoded. For this purpose, an encoding memory 15 </ b> B is provided, and the writing operation and the reading operation are controlled by the system control circuit 11.
[0021]
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. When a command signal for performing a reproducing operation is output from the computer device 10, the command signal is input to the system control circuit 11 constituting the drive device via the interface 9.
[0022]
When the command signal for such reproduction is input to the system control circuit 11, the control operation for the reproduction operation by the system control circuit 11 is started. When such a reproducing operation is performed, the laser diode incorporated in the optical pickup 4 is supplied from the laser driving circuit 13 with a driving current for obtaining a laser output for performing a signal reading operation. Is set to
[0023]
When the control operation for such a reproduction operation is started, the rotation control operation of the spindle motor 2 is performed by the spindle motor drive circuit 14. The rotation control operation of the spindle motor 2 is performed by decoding the wobble signal. By comparing the obtained synchronization signal with a reference signal output from a reference signal generation circuit (not shown), the disk 1 is rotated at a desired constant linear velocity. Such a control operation is similarly performed at the time of a signal recording operation described later.
[0024]
The rotation control operation of the spindle motor 2 is performed as described above. In the optical pickup 4 that performs a signal reading operation, the focusing control operation and the tracking control operation are started, and the signal from the disc 1 by the optical pickup 4 is transmitted. Is performed. Then, the operation of reproducing the signal recorded in the signal recording area is started by first performing the operation of reading the TOC data recorded in the lead-in area of the disk 1.
[0025]
The operation of reading and reproducing the data signal recorded on the disk 1 is performed based on the TOC data recorded in the lead-in area. The signal read out by the optical pickup 4 is amplified and shaped by an RF signal amplifying circuit 5 and then input to a digital signal processing circuit 7 to perform a signal demodulating operation. When signal processing is performed by the digital signal processing circuit 7 to extract information data, the information data is subjected to signal processing such as error correction and then applied to a signal reproduction circuit 8. The signal input to the signal reproducing circuit 8 is output to the computer device 10 via the interface 9.
[0026]
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.
[0027]
The operation of recording a signal on the disk 1 is as follows. First, a test signal is recorded and reproduced 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. It is set as follows. When such a laser output setting operation is performed, an operation of reading information data recorded in a buffer area in which position information of a signal recorded on the disk 1 is recorded is performed.
[0028]
Based on the information data read out in this way, it is possible to perform a recording operation of a data signal in a signal recording area provided on the disc 1 and to perform a recognition operation such as where the recording operation is to be performed. Done. The recording position is set based on the information data recorded in the buffer area, and the signal is recorded from the set position thereafter. The data signal which is the recording signal output from the computer device 10 is Is temporarily written to the buffer memory 15A.
[0029]
When the operation of writing the recording data to the buffer memory 15A is performed, the storage amount of the signal stored in the buffer memory 15A gradually increases. When the storage amount exceeds a predetermined amount, the recording data signal stored in the buffer memory 15A is read out and written to the encoding memory 15B provided for performing the encoding process.
[0030]
The recording data signal stored in the encoding memory 15B is supplied to the laser drive circuit 13 as a recording signal after the encoding processing by the signal recording circuit 12 is performed in a known manner. When such a recording signal is supplied to the laser driving circuit 13, the driving signal is applied from the laser driving circuit 13 to the laser diode incorporated in the optical pickup 4, so that the recording signal is output from the computer device 10. The recording data signal is recorded on the disk 1.
[0031]
By such an operation, an operation of recording a recording data signal on the disk 1 is performed, but an operation of writing a signal to the buffer memory 15A is performed according to an operation of reading a signal from the buffer memory 15A. It is configured. As described above, the recording operation of the recording data signal on the disk 1 is performed, but the recording is performed in units of blocks called ECC by the decoding process by the signal recording circuit 12. In FIG. 2, A, B, and C are blocks recorded in this manner, and one ECC is composed of 16 sectors.
[0032]
As described above, the general recording operation in the optical disk recording / reproducing apparatus is performed. Next, the operation of the present invention will be described.
[0033]
The optical disk recording / reproducing device is configured to perform a recording operation based on a recording command signal output from a computer device 10 connected as a host device. The signal transmission / reception operation is performed as follows. In other words, the recording data signal is transmitted together with the recording command signal from the computer device 10. When all such signals are received, a signal indicating that all the signals have been received from the optical disk recording / reproducing device side is transmitted to the computer device 10. The operation is performed. By receiving such a signal, the computer device 10 can recognize that the transmission operation of the recording data signal has been performed normally, and will output a recording command signal for recording the next recording data. By repeatedly performing such a signal transmission / reception operation between the optical disk recording / reproducing apparatus and the computer device 10, the recording data signal can be recorded on the disk 1.
[0034]
If the amount of the recording data signal output from the computer device 10 becomes smaller than the amount of the recording data signal read from the buffer memory 15A for recording on the disk 1, the recording data signal stored in the buffer memory 15A When the amount decreases and the amount falls below a predetermined value, a buffer underrun situation occurs. In such a situation, the operation of interrupting the signal recording operation on the disk 1 is performed by a known technique, and the interruption position is performed in block units.
[0035]
When the recording interruption operation is performed in block units, the recording restart operation after the recording interruption is resumed from the beginning of the block, thereby maintaining the continuity between the signal recorded before the recording interruption and the signal recorded after the recording restart. This is because it can be easily performed.
[0036]
When a buffer underrun situation occurs, the operation of recording on the disk 1 is interrupted by the operation of the system control circuit 11, but the operation of receiving the signal output from the computer device 10 is temporarily stopped when the interruption operation is performed. According to the present invention, an operation of stopping the receiving operation after receiving all the recording data signals accompanying the recording command signal received when the recording operation is interrupted is configured.
[0037]
For example, when the recording operation is interrupted, if the length of the recording signal transmitted from the computer device 10 is 20 sectors, 16 sectors of the recording signal can be recorded on the disc 1. The remaining four sectors will not be recorded. The signals for these four sectors are stored in the buffer memory 15A by the operation of receiving the recording command signal. When the receiving operation is stopped due to the interruption of the recording operation, the signal for 4 sectors stored in the buffer memory 15A is copied to the encoding memory 15B, and the computer device 10 On the other hand, a signal indicating that the recording command signal can be received is transmitted.
[0038]
When the buffer underrun situation occurs, the recording interruption operation is performed as described above. However, after all the recording data signals accompanying the recording command signal being transmitted from the computer apparatus 10 are received, the reception interruption operation of the transmission signal is temporarily stopped. Therefore, there is no hindrance to the arithmetic processing operation of the computer device 10. Then, after the recording interruption operation is performed, a signal indicating that the recording command signal can be transmitted to the computer device 10 is transmitted, so that the computer device 10 performs the transmission operation of the recording signal. When the situation arises, the recording data signal is transmitted to the optical disk recording / reproducing apparatus together with the recording command signal.
[0039]
When a recording data signal is transmitted together with a recording command signal from the computer device 10 in a state where the recording operation is interrupted, a receiving operation on the optical disk recording / reproducing device side is performed. The recording data signal transmitted from the computer device 10 is written into the buffer memory 15A, and when the storage amount reaches a predetermined amount, the recording operation on the disk 1 is restarted from the recording interruption position.
[0040]
The recording data signal read from the buffer memory 15A is encoded into a signal of 16 sectors, that is, a signal of 1 ECC unit together with the signal of 4 sectors stored in the encoding memory 15B, and the laser driving circuit 13 Supplied to As a result of the start of the recording operation by such an operation, a recording data signal is recorded on the disk 1 following the block C recorded before the interruption as shown by D in FIG.
[0041]
As described above, when the buffer underrun state occurs, the recording interruption resuming operation is performed. However, when the recording interruption operation is performed, the receiving operation is interrupted after performing the receiving operation of the recording command signal and the recording data signal being received. Therefore, there is no adverse effect on the arithmetic processing of the computer device 10.
[0042]
【The invention's effect】
The present invention relates to an optical disk recording / reproducing apparatus configured to perform a recording operation of a recording data signal on a disk in a predetermined recording unit based on a recording command signal output from a host device, wherein the recording data signal is output from the host device. A buffer memory in which a recording data signal is stored and read out and the recording data signal is encoded and recorded on a disk, and an encoding memory in which a recording data signal read out from the buffer memory and encoded is stored. When a recording operation is interrupted due to a shortage of recording data stored in the buffer memory, when a recording command signal is being received, all of the recording data signals accompanying the recording command signal are provided. Since the receiving operation is performed, it has a bad effect on the arithmetic processing of the computer device. It is not to give.
[0043]
Further, according to the present invention, when an interruption operation of the recording operation is performed, the recording data signal stored in the buffer memory is copied to the encoding memory and the receiving operation of the recording command signal from the host device is restarted. Therefore, the recording restart operation can be performed promptly.
[0044]
Further, according to the present invention, when the recording operation is interrupted, a receivable signal is transmitted to the host device, so that the operation of transmitting the recording data signal from the host device can be performed. Can be quickly recognized.
[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]
DESCRIPTION OF SYMBOLS 1 Disc 2 Spindle motor 4 Optical pickup 7 Digital signal processing circuit 8 Signal reproduction circuit 10 Computer device 11 System control circuit 12 Signal recording circuit 15 Memory circuit 15A Buffer memory 15B Encoding memory

Claims (3)

In an optical disc recording / reproducing apparatus configured to perform a recording operation of a recording data signal on a disc in a predetermined recording unit based on a recording command signal output from a host device, a recording data signal output from the host device is A buffer memory in which a recorded data signal that is stored and read is encoded and recorded on a disk, and an encoding memory in which a recorded data signal that is read and encoded from the buffer memory and stored is provided. When the recording operation is interrupted due to a shortage of the recording data stored in the buffer memory, if a recording instruction signal is being received, the receiving operation of all the recording data signals accompanying the recording instruction signal is performed. A recording control method for an optical disk recording / reproducing apparatus, characterized in that the method described above is performed. When the recording operation is interrupted, the recording data signal stored in the buffer memory is copied to the encoding memory and the receiving operation of the recording command signal from the host device is restarted. The recording control method according to claim 1. 2. The recording control method according to claim 1, wherein a receivable signal is transmitted to the host device when the recording operation is interrupted.

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