JP3957447B2 - Control system for optical disk recording / reproducing apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an optical disk recording system configured to record a signal on a disk by a light beam emitted from a laser element incorporated in an optical pickup and perform a reproduction operation of the signal recorded on the disk by the light beam. The present invention relates to a playback device.
[0002]
[Prior art]
Disc players that use optical pickups to read signals recorded on discs have become widespread, but recently, in addition to the playback function, the light emitted from the laser elements incorporated in the optical pickups An optical disc recording / reproducing apparatus configured to record a signal on a disc by a beam has been commercialized.
[0003]
Such an optical disk recording / reproducing apparatus is often used by being connected to a computer device which is a host device. Such a host device is connected to many peripheral devices by a data bus.
[0004]
[Problems to be solved by the invention]
An optical disc recording / reproducing apparatus is configured to perform a signal recording operation in accordance with a recording command from a computer device that is a host device. In such a recording operation, a signal to be recorded on a disc is temporarily stored in a buffer RAM. The signal recording operation to the disk is performed by reading the signal stored in the buffer RAM.
[0005]
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 recording operation of the signal on the disc is performed in accordance with the amount of the recording signal and the recording state on the disc.
[0006]
In a state where the signal recording operation is being performed, if the amount of the recording signal stored in the buffer RAM is insufficient, a state in which the signal recording operation cannot be performed on the disk, that is, a so-called buffer underrun state occurs. As a method for solving such a problem, when the amount of the recording signal stored in the buffer RAM becomes less than a predetermined value, that is, the interruption set value, the recording operation to the disk is temporarily stopped and stored in the buffer RAM. A technique has been developed in which the recording operation on the disc is resumed when the amount of the recorded signal exceeds a predetermined value, that is, a restart setting value.
[0007]
In addition, if the amount of recording signal output from the host device to the optical disc recording / playback apparatus is insufficient, a situation called buffer underrun occurs, and the recording operation of the signal to the disc is interrupted. When the recording signal output operation is not performed for a long time due to the abnormality, the host device is configured to process as an error. When such error processing is performed, the recording operation of the optical disc recording / reproducing apparatus is also stopped, so that not only the signal recorded on the disc until then but also the signal is recorded on the write-once disc. In this case, there is a problem that the disk becomes unusable.
[0008]
The present invention is intended to provide a control system for an optical disc recording / reproducing apparatus capable of solving such a problem.
[0009]
[Means for Solving the Problems]
The present invention interrupts the recording operation to the disc when the amount of the signal stored in the buffer RAM in which the recording signal is temporarily stored becomes less than the set interruption value when performing the recording operation to the disc. An optical disc recording / reproducing apparatus configured to resume a recording operation when the amount of signals stored in the buffer RAM increases to a restart setting value, a host device connected to an external peripheral device via a data bus a control system for an optical disc recording and reproducing apparatus controlled by, when the output operation of the recording signal from the host device during the recording operation of the signal to the disk is not performed for a predetermined time, the data outputted completed with respect to the optical buffer RAM and de stores the information about the remaining data not yet output to the buffer RAM in the host device Information regarding data recorded in the disk is stored in non-volatile memory incorporated in the optical disk recording and reproducing apparatus, when the reset processing operation of the host device is performed by the host device recognizes the optical disc recording and reproducing apparatus, the optical disc recording The playback device outputs a notification signal for notifying that the recording operation is interrupted by interrupting the output of the recording signal to the host device, and when the notification signal is input to the host device, the remaining data is output to the host device. When the preparation is completed, a command signal for resuming the recording is output to the optical disc recording / reproducing device, and the buffer RAM is used based on the information stored in the nonvolatile memory by the command signal. Recording on the optical disc is repeated so that the read signal is recorded following the signal recorded on the disc. And so as to perform the recording restart operation of the apparatus.
[0010]
【Example】
FIG. 1 is a block circuit diagram showing an embodiment of a control system for an optical disc recording / reproducing apparatus according to the present invention. In the figure, reference numeral 1 denotes a disk placed on a turntable (not shown) that is rotationally driven by a spindle motor (not shown), and is configured to be rotationally driven by the rotation of the turntable. . Further , the disc 1 is recorded with position information data in 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 element (not shown) for irradiating the disk 1 with a light beam, and a monitoring diode for monitoring the level of the light beam emitted from the laser element, and reflected from the signal surface of the disk 1. It is an optical pickup incorporating a photodetector that receives a light beam, and is configured to be moved in the radial direction of the disk 1 by a pickup feed motor (not shown).
[0011]
3 RF signal amplifier circuit for waveform-integer form amplifies the RF signal obtained from the photodetector incorporated in the optical pickup 2, 4 based on a signal obtained via the RF signal amplifier circuit 3 A focus control circuit that performs focusing control for focusing the light beam output from the optical pickup 2 on the signal surface of the disk 1 and tracking control for causing the light beam to follow the signal track on the signal surface; In addition, a tracking servo circuit is incorporated.
[0012]
Reference numeral 5 denotes a digital signal processing circuit that performs digital signal processing of signals output from the RF signal amplification circuit 3 and performs demodulation operations of various signals. Reference numeral 6 denotes a digital signal that is processed by the digital signal processing circuit 5. If the information recorded on the disc 1 is an audio signal, it is converted to an analog signal and then output to an amplifier or the like. In the case of a data signal such as computer software, it is digital. The signal is output to the computer device 7 provided as a host device as a signal.
[0013]
A system control circuit 8 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. 9 is a signal recording circuit for recording a data signal or the like on the disk 1 by inputting a recording signal such as a test signal or an information signal and controlling the laser irradiation operation by the laser driving circuit 10 in response to the recording signal. It is.
[0014]
Reference numeral 11 denotes a buffer RAM in which a signal recorded on the disk 1 is temporarily stored. A signal output from the computer device 7 is written and a signal storing operation and a reading operation are controlled by a control operation of the system control circuit 8. It is configured to be. The signal stored in the buffer RAM 11 is still stored after being read out to be recorded on the disk 1, and then a new signal output from the computer device 7 is stored at that position. In this way, the information is sequentially overwritten and erased. Reference numeral 12 denotes a spindle motor drive circuit whose operation is controlled by the system control circuit 8 and has a function of controlling the rotational drive of a spindle motor that rotationally drives the disk 1.
[0015]
The computer device 7 is connected to a peripheral device such as a printer or a scanner via a data bus 13, and is configured to perform a reset operation when an abnormality occurs in the peripheral device. Reference numeral 14 denotes a non-volatile memory in which operation is controlled by the system control circuit 8 and information data necessary for resuming recording is performed when a processing operation accompanying recording interruption is performed.
[0016]
In such a configuration, during the recording operation of the signal to the disk 1, the signal output from the computer device 7 is stored in the buffer RAM 11, and the reading operation of the stored signal is controlled to control the signal to the disk 1. The signal recording operation is controlled. When the signal recording operation on the disk 1 is interrupted and the recording operation is resumed, the signal stored in the buffer RAM 11 and the signal recorded on the disk 1 before the interruption are The comparison operation is performed so that the signal is recorded continuously with the signal recorded before the interruption, that is, the signal is recorded by a method called seamless.
[0017]
Further, while the signal recording operation to the disk 1 is being performed, the memory circuit provided in the system control circuit 8 is configured to store the final address of the position where the normal recording operation has been performed. Yes. When the recording operation is interrupted because the recording signal amount stored in the buffer RAM 11 is insufficient during the recording operation and the recording operation is interrupted, the recording is interrupted based on the final address stored in the memory circuit. The recording operation can be performed seamlessly from the position.
[0018]
As described above, the control system of the optical disc 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 reproduction operation is output from the computer device 7 to the system control circuit 8 constituting the drive device, the control operation for the reproduction operation by the system control circuit 8 is started. When such a reproduction operation is performed, the laser drive circuit 10 is supplied with a drive current for obtaining a laser output for performing a signal read operation to the laser element incorporated in the optical pickup 2. Is set to
[0019]
When the control operation for the reproduction operation is started, the spindle motor rotation control operation is performed by the spindle motor drive circuit 12, and the spindle motor rotation control operation is obtained by decoding the wobble signal. The disk 1 is driven to rotate at a constant linear velocity by comparing the synchronization signal with a reference signal output from a reference signal generation circuit (not shown). Such a control operation is similarly performed during a signal recording operation described later.
[0020]
The rotation control operation of the spindle motor is performed as described above. In the optical pickup 2 that performs the signal reading operation, the focusing control operation and the tracking control operation are started, and the signal from the disk 1 by the optical pickup 2 is started. Although the read operation is started, the read operation of the TOC data recorded in the lead-in area constituting the first session of the disc 1 is performed prior to the reproduction operation.
[0021]
The reading / reproducing operation of the signal recorded in the signal recording area of the first session recorded on the disc 1 is performed based on the TOC data recorded in the lead-in area. Signal read by the optical pickup 2 is inputted to the digital signal processing circuit 5 after being amplified and Sei Namikata form through an RF signal amplifier circuit 3 signal demodulation operation is performed. When signal processing is performed by the digital signal processing circuit 5 and information data is extracted, the information data is subjected to signal processing such as error correction and then applied to the signal reproduction circuit 6.
[0022]
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 it to an amplifier or the like. Is output to the computer device 7 as a digital signal.
[0023]
As described above, the reproduction operation in this embodiment is performed. Next, the signal recording operation on the disk 1 will be described.
[0024]
The operation of recording a signal on the disc 1 is started from an operation for setting a laser output most suitable for the characteristics of the disc 1 by first recording a test signal in a test writing area provided on the disc 1. Such a setting operation is performed by recording the test signal while changing the laser output and reproducing the recorded signal.
[0025]
When such a laser output setting operation is performed, an operation of reading information data recorded in an area called a buffer of the disk 1, that is, position information of a signal recorded in the signal recording area is performed. Based on the information data read out in this way, it is possible to recognize whether a data signal recording operation is possible in the signal recording area provided on the disc 1 and where the recording operation is performed. Operation is performed.
[0026]
When such a recognition processing operation is completed, the optical pickup 2 is moved to a position where the recording operation on the disk 1 is started, and a recording signal writing operation to the buffer RAM 11 is performed. When a signal writing operation to the buffer RAM 11 is performed, the storage amount of the signal stored in the buffer RAM 11 gradually increases. When the storage amount exceeds a predetermined amount, the signal stored in the buffer RAM 11 is read, and the read signal is input to the signal recording circuit 9. As a result, the control operation of the laser drive circuit 10 by the signal recording circuit 9 is performed, and a signal is recorded on the disk 1.
[0027]
By such an operation, a signal recording operation to the disk 1 is performed, but a signal writing operation to the buffer RAM 11 is performed in accordance with a signal reading operation from the buffer RAM 11. . In a state where the recording operation is normally performed, an operation for storing an address indicating the position, that is, a final address in the memory circuit is performed every time a signal recording operation to the disk 1 is performed.
[0028]
Then, in a state where the signal recording operation to the disk 1 is being performed, the amount of the signal output from the computer device 7 and written to the buffer RAM 11 is compared with the amount of the signal read out for recording on the disk 1. If the number of recording signals decreases, the amount of recording signals stored in the buffer RAM 11 gradually decreases. When the amount of the recording signal stored in the buffer RAM 11 decreases to a predetermined amount, that is, when the buffer underrun state is entered, a control operation for interrupting the recording operation on the disk 1 is performed. When such an interruption operation is performed, the signal reading operation from the buffer RAM 11 is also interrupted.
[0029]
In this state, when a recording signal is output from the computer device 7, a control operation for writing the recording signal to the buffer RAM 11 is performed, and the amount of the recording signal stored in the buffer RAM 11 is reduced. It will gradually increase. When the amount of the recording signal stored in the buffer RAM 11 increases and the amount reaches a predetermined amount, a control operation for resuming the recording operation is performed.
[0030]
Such a recording restart operation is performed by first displacing the optical pickup 2 to a position where the recording operation is started, that is, a position retracted from the position where the recording operation was interrupted, and then performing a reproducing operation from that position. . The position where the recording is interrupted can be easily recognized from the final address stored in the memory circuit every time the normal recording operation is performed, and the optical pickup 2 can be moved to a desired position.
[0031]
A signal reproduced by such a reproduction operation is a signal recorded immediately before the recording operation is interrupted, and a comparison operation between the reproduction signal and a signal stored and held in the buffer RAM 11 is performed. When it is determined by such a comparison operation that both are the same signal, reading of the signal stored in the buffer RAM 11 and subsequent to the signal subjected to the comparison operation described above is read. As the operation is performed, the signal is input to the signal recording circuit 9 and the recording operation of the signal on the disk 1 is started. By the above-described operation, the recording interruption operation and the recording resumption operation of the signal to the disc 1 can be performed. By performing such an operation, the signal is continuously supplied to the disc 1 even though the recording operation is interrupted. Recording operation, so-called seamless recording operation can be performed.
[0032]
When the signal recording operation to the disc 1 is being performed, if the recording signal output from the computer device 7 is insufficient, the signal recording operation to the disc 1 is temporarily interrupted and output from the computer device 7 as described above. When the recording signal is stored in the buffer RAM 11 and the amount reaches a predetermined amount, the recording operation to the disk 1 is resumed, but the recording operation is interrupted and the recording signal is connected via the data bus 13. A case where a recording signal is not output from the computer device 7 for a predetermined time or more due to the influence of peripheral devices or the like will be described.
[0033]
If a recording signal is not output from the computer device 7 to the buffer RAM for a predetermined time or more, the computer device 7 determines that an error has occurred and starts error processing. On the other hand, a processing operation for storing and holding information relating to data that has been output and data that has not yet been output among signals to be recorded, that is, residual data, is performed.
[0034]
On the other hand, on the optical disc recording / reproducing apparatus side, a processing operation is performed in which information related to data recorded on the disc 1 that has been stored in the memory circuit when recording of the signal on the disc 1 is interrupted is stored in the nonvolatile memory 14. The processing operation for storing and holding the information related to the data recorded on the disc 1 in the nonvolatile memory 14 is the same as the recording interruption operation performed when the above-described state called buffer underrun occurs.
[0035]
The processing operation described above, that is, the processing operation for storing and holding the information about the data that has been output to the buffer RAM 11 and the remaining data that has not been output yet in the signal to be recorded, and the data recorded on the disk 1 After the processing operation for storing and holding information in the nonvolatile memory 14 is performed, an error processing operation by the computer device 7 is performed.
[0036]
When the recording signal is not output from the computer device 7 for a long time while the signal recording operation is being performed on the disc 1, the error processing operation described above is performed. The operation for resuming the recording operation to 1 will be described.
[0037]
When a reset processing operation such as a restart operation or a reset operation of the computer device 7 is performed, the computer device 7 performs a recognition operation on the optical disc recording / reproducing device. When such a recognition operation is performed, a signal is output from the system control circuit 8 incorporated in the optical disc recording / reproducing device to notify the computer device 7 that the recording operation has been interrupted due to the interruption of the recording signal. The
[0038]
When such a signal is input to the computer apparatus 7, a processing operation for resuming the recording operation of the signal from the computer apparatus 7 to the disk 1 is started. Such processing operation is based on the information stored in the computer device 7, that is, the data that has been output to the buffer RAM 11 and the information on the remaining data that has not yet been output in the signal to be recorded. When the preparation is completed, a control operation for starting a recording signal output operation to the buffer RAM 11 and a recording resumption operation in the optical disc recording / reproducing apparatus is performed. Such a recording resumption operation uses information relating to data recorded on the disk 1 stored and held in the nonvolatile memory 14, and reproduces a signal recorded on the disk 1 in the same manner as the above-described recording interruption resumption operation. This is performed so that the signal read from the buffer RAM 11 is continuously recorded on the reproduced signal.
[0039]
As a result of such an operation, even if the recording signal is not output from the computer device 7 due to some abnormality during the recording operation on the disc 1, the reset processing operation is performed and then the signal recorded on the disc 1 continues. to perform the recording operation of the remaining data to come out.
[0040]
In this embodiment, a memory circuit for storing information such as the signal recording position of the disk 1 when performing a normal recording interruption resumption operation is provided separately from the nonvolatile memory 14. Of course, it is also possible to use them together. Further, since the information of the data recorded on the disk 1 is stored by the non-volatile memory 14, if the disk 1 is recognized even after the power of the optical disk recording / reproducing apparatus is shut off, the interrupted signal can be continued. Thus, the signal recording operation can be performed without any trouble.
[0041]
【The invention's effect】
The present invention, when the output operation of the recording signal from the host device during a recording operation of the signal to the disk is not performed for a predetermined time, yet output to output completion data and a RAM buffer to the buffer RAM for The information related to the remaining data is stored in the host device, and the information related to the data recorded on the disc is stored in the nonvolatile memory incorporated in the optical disc recording / reproducing apparatus, and the reset processing operation of the host device is performed. When the host device recognizes the optical disc recording / reproducing device, the optical disc recording / reproducing device outputs a notification signal for notifying that the recording operation has been interrupted due to the interruption of the output of the recording signal to the host device. Input to the host device, the host device prepares to output the remaining data, and the preparation is completed. When a command signal for resuming recording is output to the optical disc recording / reproducing apparatus, a signal read from the buffer RAM based on information stored in the nonvolatile memory by the command signal is recorded on the disc. Since the recording restart operation is performed by the optical disc recording / reproducing device so that the recording is continued, the reset processing of the host device is performed even if the recording signal is not output due to the abnormality of the host device during the recording operation to the disc. When the operation is performed, a recording resuming operation is performed by the optical disc recording / reproducing apparatus, and the signal read from the buffer RAM can be continuously resumed so as to be continuous with the signal recorded on the disc .
[Brief description of the drawings]
FIG. 1 is a block circuit diagram showing an embodiment of a control system for an optical disc recording / reproducing apparatus according to the present invention.
[Explanation of symbols]
1 Disc 2 Optical Pickup 4 Pickup Control Circuit 5 Digital Signal Processing Circuit 7 Computer Device 8 System Control Circuit 11 Buffer RAM
13 Data bus 14 Non-volatile memory

Claims (1)

When the amount of the signal stored in the buffer RAM in which the recording signal is temporarily stored is less than the set interruption value when performing the recording operation to the disk, the recording operation to the disk is interrupted and the buffer RAM An optical disc for controlling an optical disc recording / reproducing device configured to resume a recording operation when the amount of signals stored in the disc increases to a restart setting value by a host device connected to an external peripheral device by a data bus In the control system of the recording / reproducing apparatus, when the recording signal output operation from the host device is not performed for a predetermined time during the recording operation of the signal to the disk, the data output to the buffer RAM and the buffer RAM are output. recorded on the disk stores the information about the remaining data not yet output Te by the host device And the information about the data stored in non-volatile memory incorporated in the optical disk recording and reproducing apparatus, when the reset processing operation of the host device is performed host device recognizes the optical disc recording and reproducing apparatus, from the optical disk recording and reproducing apparatus The host device outputs a notification signal for notifying that the recording operation has been interrupted due to the interruption of the recording signal output, and the host device prepares for output of the remaining data by inputting the notification signal to the host device. When the preparation is completed, a command signal for resuming recording is output to the optical disk recording / reproducing device, and the optical disk recording / reproducing device uses the command signal to output the buffer RAM based on information stored in the nonvolatile memory. you have to record the signals more read following the signal recorded on the disk The control system of the optical disk recording and reproducing apparatus characterized.

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