JP2000311434A - Optical disk recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a data read-out operation correct by performing an edit recording operation for recording information data in a buffer area after performing an information read-out operation when the number of information data which are recorded in the buffer area becomes a prescribed number. SOLUTION: When a signal is recorded from a prescribed position provided at the outer peripheral side of the buffer area and a recording operation equivalent to one data is performed with respect to a signal area, information data indicating a position where the data signal is recorded are stored in a RAM 10 for a buffer. The information data stored in the RAM 10 are repeatedly recorded in prescribed times in the buffer area provided on a disk 1. When the recording operation of the data signal to a signal area is completed, an instruction for recording a next data signal is outputted from a computer device 7 and the reading of the information data stored in the buffer area is performed and the position of a track succeeding to the signal area can be recognized.

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]

An optical disk recording / reproducing apparatus called a rewritable type capable of repeatedly recording a signal on a disk many times is configured to perform a signal recording operation in accordance with a recording command from a host. However, when the recording operation is completed, the TOC data indicating the recording position of the signal, the type of the recorded signal, and the like is recorded in the 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.

In such an optical disk recording / reproducing apparatus,
When a data signal is recorded in the signal recording area, an operation of recording information data in the buffer area is performed. However, as the number of tracks of the data signal increases, the information data recorded in the buffer area also increases. Since the recording operation of the information data in the buffer area is performed every time the recording operation of the data signal in the signal recording area is performed, the information data in the buffer area is recorded in a discontinuous state. Become. As a result, the recording characteristics of the information data are not uniform, so that the reading operation of the information data may not be performed accurately.

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

[0006]

According to the present invention, when the number of pieces of information data recorded in a buffer area reaches a predetermined number, the information data is read out from the buffer area, and then the information data is recorded in the buffer area. It is configured to perform an edit recording operation.

[0007]

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, a type of a recorded signal, and the like are recorded, and corresponds to the 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) which is 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 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 focusing control for focusing a light beam of the optical pickup 2 on a signal surface of the disk 1 and tracking control for causing the light beam to follow a signal track on the signal surface.

Reference numeral 5 denotes a digital signal processing circuit that performs digital signal processing of the signal output from the RF signal amplifier circuit 3 and performs a demodulation operation of various signals, and 6 denotes a digital signal processed by the digital signal processing circuit 5. A signal reproducing circuit to which a signal is input. When the information recorded on the disc 1 is an audio signal, the signal is converted into an analog signal and then output to an amplifier or the like, and when the data signal is data such as computer software. Has the function of outputting the digital signal as it is to the computer device 7 provided as a host.

Reference numeral 8 denotes a system control circuit which receives a signal demodulated by the digital signal processing circuit 5 and performs various control operations in accordance with a command signal output from the computer device 7. Reference numeral 9 denotes a recording signal, such as a test signal or an information signal, which is input and controls a laser irradiation operation by a laser driving circuit (not shown) in accordance with the signal, thereby recording a data signal or the like on the disk 1. This is a signal recording circuit.

When a data signal recording operation is performed in a signal recording area provided on the disk 1, information data indicating a recording position of the data signal is stored, and a buffer of the disk 1 is stored with the editing and recording operation. This is a buffer RAM in which information data read from the area B is stored.

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 that performs a signal reading 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 reading and reproducing operation of 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, and the reproducing operation is performed by the TO operation recorded in the lead-in area T1.
Since it is performed based on the C data, the reproduced signal is
This is recorded in the data signal recording areas C and D constituting the first session. Similarly, the TOC recorded in the lead-in area T2 constituting the next session
By reading the data, it is possible to perform the operation of reproducing the signals recorded in the data signal recording areas E, F and G in which the signals corresponding to the TOC data are recorded.

As described above, the reproducing operation in this embodiment is performed. Next, the operation of recording a signal on the disk 1 will be described.

The operation of recording a signal on the disk 1 is performed by first recording and reproducing a test signal in a test writing area A provided on the disk 1 so that a drive current for obtaining a laser output optimal for the recording operation is obtained by a laser diode. Is set to be supplied to When the laser output setting operation is performed, an operation of reading information data recorded in the buffer area B, that is, position information of a signal recorded in the signal recording area, and the like is performed.

Based on the information data read in this manner, whether a data signal recording operation can be performed in a signal recording area provided on the disk 1 and 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 by setting the predetermined lead-in area T1 to a predetermined position. And started from the outer peripheral 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 is performed on the disk 1 on which no data signal is recorded in this manner. Next, a case where the recording operation is performed using the disk on which the first session is recorded will be described.

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

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

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

For example, the 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 on which a data signal is recorded, and the information data is used to determine the position of the lead-in area T3. Can be recognized.

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

In this case, 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 a data signal on the disk 1 is performed. Next, the operation for recording TOC data in the lead-in area will be described.

When ending the recording operation of the first session, 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 remaining recordable amount is not the predetermined amount, that is, is determined to be smaller than the predetermined amount,
In the lead-in area T1, in addition to normal TOC data, that is, information data indicating the type of data signal recorded in the signal recording areas C and D, its recording position, and information data indicating the position of the lead-out area L1, the following Data indicating that there is no remaining amount for performing the recording operation, for example, non-recordable data is recorded.

When such non-recordable data is recorded, non-recordable data in the TOC data recorded in the lead-in area T1 is read out when the next recording operation is performed. It is possible to recognize that the disc cannot perform a recording operation. Therefore, when such non-recordable data is read, it is possible to make the user aware by displaying an indication that the disc cannot perform a recording operation.

As described above, the signal recording operation in this embodiment is performed. Next, the editing and recording 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. Each time the recording operation is performed, the information data is stored in the buffer area B provided on the disc 1. Is performed.

In the buffer area B provided on the disk 1, one information is recorded in five frames, and the recording operation is performed such that ten frames are recorded as one recording unit. Information data indicating a track number and an address indicating a recording position as information for creating TOC data as one information is recorded in five frames. However, since a recording operation is performed using ten frames as one unit, The same information data is recorded for 10 frames. Further, as information data recorded in the buffer area, there is identification data for identifying a disc in addition to the above-mentioned TOC data, and this identification data may be recorded once on one disc, and the data is ,
One piece of information.

Therefore, when the discrimination data of the disc is not recorded when the recording operation is performed, the TOC data, which is one piece of information, is changed twice every five frames, that is, every ten frames each time the recording operation of the data signal is performed. The data is recorded in the buffer area B. Also, when disc identification data is recorded, first, five pieces of identification data, one piece of information, are recorded, and then TOC data, one piece of information, is recorded.
Frame recording will be performed. When the next data signal recording operation is performed, only the TOC data is recorded. Therefore, the TOC data, which is one piece of information, is recorded twice in 5 frames, that is, 10 frames at a time in the buffer area B. Will be done.

As described above, information data is recorded in the buffer area B every time a data signal recording operation is performed in the signal recording area. However, such a recording operation is performed discontinuously. become. When the information data recording operation is performed a predetermined number of times, for example, five times, the information data recorded in the buffer area B, that is, five pieces of information data are read, and the read information data is temporarily stored in the buffer RAM 10. Is performed.

When the recording operation of the information data in the buffer area B is performed a predetermined number of times, the buffer area B
The operation of reading the information data from the RAM 10 and the operation of storing the read information data in the buffer RAM 10 are performed. After such an operation is performed, the buffer RAM 10
The recording operation of the information data stored in the buffer area B is performed. In this case, the recording operation of the information data in the buffer area B is performed continuously.

When the recording operation of the information data in the buffer area B reaches a predetermined number of times, the above-mentioned operation, that is, the editing recording operation is performed. After the editing recording operation is performed, the information data recording operation is performed a predetermined number of times. When performed, the editing and recording operation described above is performed. The editing and recording operation performed in this case includes all information data recorded in the buffer area B, that is, a processing operation of reading out and re-recording 10 pieces of information data or an information data recorded after the edit recording operation. It is possible to perform a processing operation of reading and re-recording the five pieces of information data.

Also, by setting the recording start position of the buffer area B to be re-recorded by the edit recording operation to the starting point of the position where the read information data was recorded, the recording area of the buffer area B can be made effective. Can be used.

[0050]

According to the present invention, when the number of information data recorded in the buffer area reaches a predetermined number, an editing / recording operation of reading the information data and then recording the information data in the buffer area is performed. Is performed, the recording characteristics of the information data recorded in the buffer area can be made uniform. Therefore, the reading operation of the information data recorded in the buffer area can be performed accurately.

Further, according to the present invention, since the recording start position of the information data recorded by the editing recording operation is set to the starting point of the position where the read information data was recorded, the recording area of the buffer area can be effectively used. It has the advantage that it can be used.

According to the present invention, when the number of information data reaches a predetermined number, the editing and recording operation is performed by performing the reading operation of all the information data recorded in the buffer area. The recording operation of the information data in the area can all be performed continuously. Therefore,
The present invention has an advantage that the recording characteristics of all information data can be made uniform.

[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 (4)

[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 on the basis of the read information data in a lead-in area, the number of information data recorded in a buffer area becomes a predetermined number. An optical disk recording / reproducing apparatus, wherein when the information data is read, an edit recording operation of recording the information data in the buffer area is performed after the information data is read. 2. An editing and recording operation is performed each time the number of information data reaches a predetermined number.
An optical disk recording / reproducing apparatus according to claim 1. 3. A recording start position at which information data is recorded by an edit recording operation is set to a start point of a position at which the read information data was recorded.
An optical disk recording / reproducing apparatus according to claim 1. 4. When the number of information data reaches a predetermined number,
3. The optical disk recording / reproducing apparatus according to claim 2, wherein an editing recording operation is performed by performing a reading operation of all information data recorded in the buffer area.