JP2001344872A - Optical disk recording device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To enable a rescue of an optical disk even if a failure in data recording due to power-off to the optical disk occurs. A disk management information storage unit stores and manages a recording unit of data that has failed to be written to an optical disk as unwritten and manages the data that failed to write data to the optical disk under the control of a system controller. When the write failure position is detected, and when the failed data is rewritten, the recording operation is started from the beginning of the data in synchronization with the signal of the data written to the optical disk 20, and the data write failure is performed until the data write failure position The recording operation is performed without writing the data, and the recording operation for actually writing the data is performed from the data writing failure position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a CD-R / RW
The present invention relates to an optical disk recording device such as a CD-R / RW drive for recording data obtained by spirally or concentrically interleaving an optical disk such as a disk.

[0002]

2. Description of the Related Art In recent years, the spread of CD-R / RW drives has been remarkable. CD-R / RW media used for CD-R / RW drive (CD-R / RW disc)
Has become the most available removable media now, with the price falling with the spread of CD-R / RW drives. At the same time, the number of users has expanded and even beginners with little knowledge of personal computers (PCs) have begun to use them.

[0003] It has been said that handling a CD-R / RW disc as described above has been difficult. One of the causes lies in the peculiarity of the CD that cannot be treated as equivalent to a normal random block storage device.

[0004] First, a CD starts with a music medium, and there are various data formats as a multimedia medium of a PC. Therefore, knowledge of the format of a CD-R / RW disc is required in order to make full use of the disc.

Further, since the physical recording method is based on continuous recording, it is not suitable for recording sporadic data. Therefore, the CD-R / RW disc cannot store data by a simple operation like a general storage device.

Therefore, a packet write method that enables block recording has been standardized so that data can be saved by a simple operation. In addition, write methods such as track-at-once, session-at-once, and disk-at-once have been standardized. And still remains difficult for beginners to understand.

However, the biggest reason why it is difficult to handle CD-R / RW discs is that data write failures easily occur depending on the system environment, and CD-R / RW discs for which data write has failed cannot reproduce data. Means that it can no longer be used.

[0008] PCs several years ago were powerless and had a CD-R / R
In order to write data to a W disk, it is necessary to create a disk image of the data on the hard disk drive (HDD) once, even though the write speed is much slower than now, and do not touch the mouse while writing the data Was done.

[0009] Although the current PC has an increased processing capability and does not need to take care as much as before, it is not so easy to use other applications while writing data. If a buffer underrun occurs due to an influence or an unexpected access from a network, data writing fails and data cannot be reproduced.

[0010] As described above, no matter how high the processing capability of the PC
However, users of CD-R / RW discs are always at risk of data recording failure. Therefore, it is a great requirement to prevent data writing from failing on a CD-R / RW disc, and to be able to rescue the CD-R / RW disc even if data writing fails. .

Conventionally, even when data writing is interrupted due to the occurrence of a buffer underrun when writing data to a CD-R disk, an optical disk recording apparatus that resumes data recording in a reproducible manner (for example, Japanese Patent Laid-Open No. 10-49990). , JP-A-2000-40302).

An optical disk recording apparatus that resumes data recording in a reproducible manner even if data writing is interrupted due to deviation of tracking during data writing to a CD-R disk (see, for example, Japanese Patent Application Laid-Open No. 5-282696).
Has been proposed.

[0013]

However, in the above-mentioned conventional optical disk recording apparatus, the power supply is cut off so that
If data writing to the DR disk is interrupted and data recording fails, even if new data is sent from the host computer, recovery from the interruption cannot be completed in the optical disk recording device. In addition, there is a problem that the subsequent data cannot be written from the position where the interruption occurred at the time of the interruption, and the recorded data cannot be reproduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to be able to rescue an optical disk even if a failure in data recording due to power-off of the optical disk occurs.

[0015]

According to the present invention, there is provided an optical disk recording apparatus for recording data spirally or concentrically on an optical disk in order to achieve the above object. Data record unit management means for storing and managing data as unwritten, data write failure position detection means for detecting a data write failure position at which data writing on the optical disk has failed, and rewriting of the failed data. At the time, the recording operation is started from the beginning of the data in synchronization with the signal of the data written on the optical disk, and actual data writing is performed up to the data writing failure position detected by the data writing failure position detecting means. Perform the recording operation without performing and perform the actual data writing from the data write failure position. It is provided with a recording operation control means for performing work.

In the optical disk recording apparatus as described above, a search means for searching the data write failure position on a frame basis and a data write failure position on a frame basis detected by the search by the search means are used to re-read the data. Means for setting a data write start position at the time of writing is provided, and when a data rewrite setting command is received, a search for the data write failure position is started, and data writing based on the detected data write failure position is performed. It is preferable to perform a data rewriting operation so as to overwrite a data writing frame that failed.

Further, in the optical disk recording apparatus as described above, means for detecting the data write failure position during a recording operation in which the actual data write is not performed is provided, and the data write failure position is searched in advance. It is preferable to perform the recording operation at the time of data rewriting without any problem.

In the optical disk recording apparatus as described above, means for performing an encoding operation in synchronization with a signal of data reproduced during a recording operation in which the actual data writing is not performed is provided. Is preferably formed with high positional accuracy.

Further, in the above-described optical disk recording apparatus, a PLL generated by a PLL composed of a low-frequency control loop based on a crystal oscillation clock and a high-frequency control loop based on an EFM reproduction clock is used. Preferably, the encoding is performed.

Alternatively, in the above-described optical disk recording apparatus, a P-type PLL that generates a PLL composed of a low-frequency control loop based on a crystal oscillation clock and a high-frequency control loop based on an EFM frame sync clock is generated.
The encoding may be performed based on the LL clock.

In an optical disc recording apparatus for recording data spirally or concentrically on an optical disc, a first irradiation means for irradiating a light spot for writing information on the optical disc, and a light spot preceding the light spot radiated by the means. A second irradiating means for irradiating a preceding light spot for detecting a writing failure position of information on the optical disc; and a data recording unit for storing and managing a recording unit of data failed to be written on the optical disc as unwritten. Management means; data write failure position detection means for detecting a data write failure position at which data writing on the optical disk has failed by a preceding light spot for writing failure position detection irradiated by the second irradiation means; When rewriting failed data, the above A recording operation is started in synchronization with a signal of data written on the disk, and a recording operation is performed without actually writing data up to a data write failure position detected by the data write failure position detection means. It is preferable to provide a recording operation control means for performing a recording operation for actually writing data from the data write failure position.

Further, in the optical disk recording apparatus as described above, the second irradiating means separates the track pitch of the recording track of the optical disk by (integer value +1/2) times in the radial direction to detect a write failure position. It is preferable to irradiate the preceding light spot.

Further, in the optical disk recording apparatus as described above, the second irradiating means may cause a write failure on the outer circumference of a recording track on the optical disk which irradiates a light spot for writing information by the first irradiating means. It is preferable to irradiate a preceding light spot for position detection.

[0024]

Embodiments of the present invention will be specifically described below with reference to the drawings. The optical disk drive device according to the embodiment of the present invention rescues a data write failure due to a power cut other than a buffer underrun, a reset, a servo loss, or the like. Further, the recovery process of the host computer can be performed with a minimum necessary change without greatly changing the sequence of the write process.

In the optical disk drive, the problem for recovering from the failure of data writing due to the power-off is roughly divided into the following three points. (1) Identification of data write failure position (2) Acquisition of interleaved data at data write failure position (3) Handling of failed media (optical disk)

For example, a CD-R / RW drive originally has a function of detecting the end of an incomplete track. However, in this function, detection is performed on a sector basis, and if writing is restarted from the head of the sector, the double-written portion becomes large and the data quality is significantly reduced. Therefore, in the embodiment of the present invention, the end of each EFM frame is detected by counting the EFM frame sync signal.

For example, since a CD is recorded by interleaving data, when recording is interrupted, sector data before and after the recording is required to resume recording. If the data is stored in the nonvolatile memory, the cost increases. Alternatively, it is conceivable to read the data from an optical disk. However, the raw data becomes uncorrected, and it is not very realistic considering the change of the decoding circuit.

Therefore, when the power is turned off, the host computer is required to respond, so the host computer sends the data from the previous data. Therefore, the data to be sent from the host computer is sufficient only a few sectors before the interrupted portion, and it is reasonable in processing time to perform rewriting from the interrupted portion.

However, this requires a new write sequence in which the address of the data to be sent to the host computer is returned, and the host computer also sends the data from the middle. Therefore, in the optical disk drive of this embodiment, the burden on the host computer is reduced by having the host computer send all the data to be written last time from the beginning.

Further, even for an optical disk for which writing has failed, if the TOC is normal, the optical disk drive determines that the optical disk is normal. Since the recovery of the data write failure also requires the response of the host computer, the host computer must be able to reproduce the work contents at the time of the write failure.

This means that the host computer can transmit the details of the failure to the optical disk drive, and that the optical disk drive itself does not need to detect the failure state of the optical disk.

Conversely, the host computer can recover only by passing this information to the optical disk drive, which is very easy for the host computer to handle. Therefore, the recovery sequence of the optical disk drive of this embodiment is simple, clear and very good.

However, the reliability of the data depends on the discontinuous portion of the data and how the continuous writing can be performed without double writing or blank space. For example, since a CD originally has a high error correction capability, it can be reproduced even if some data is lost at a seam of writing failure.

However, it is desirable that there is no data loss. Therefore, the detection and writing of the joint position should be performed at the frame rather than the sector and at the bit level rather than the frame.

The data written on the optical disk has a physical position at the bit level of ATI due to eccentricity or the like.
Since there is a large variation with respect to P, if the variation cannot be absorbed, a physically continuous seam cannot be formed. Therefore, the optical disk drive of this embodiment synchronizes the encoded data with the data on the optical disk.

FIG. 1 is a block diagram showing the overall configuration of an optical disk drive which is an embodiment of the optical disk recording apparatus according to claims 1 to 6 of the present invention. Arrows in the figure mainly indicate the direction of data flow.

The optical disk 20 is driven to rotate by the spindle motor 1. The spindle motor 1 is controlled by the motor driver 2 and the servo processing unit 3 so that the linear velocity or the angular velocity is constant. The linear velocity can be changed stepwise.

The optical pickup 4 includes a known semiconductor laser, an optical system, a focus actuator,
It incorporates a track actuator, a light receiving element, a position sensor, and the like, and irradiates an optical disk with laser light.
The optical pickup 4 is movable by a seek motor (not shown).

The focus actuator, the track actuator, and the seek motor use the motor driver 2 and the servo processing unit 3 to change the laser spot of the laser beam to a target location on the optical disc 20 based on signals obtained from the light receiving element and the position sensor. (Data recording position, data reproduction position).

In the case of reading (data recording), the reproduced signal obtained by the optical pickup 4 is amplified by the read amplifier 5 and binarized, and then input to the CD decoder 6 to perform deinterleaving and error correction processing. receive. Following that,
The data is input to the CD-ROM decoder 7 and subjected to an error correction process to further improve the reliability of the data.

Thereafter, the data is temporarily stored in a memory (buffer RAM) 9 by a memory manager (buffer manager) 8, and when the data is prepared as sector data, a host computer (host I / F) 10 such as ATAPI or SCSI is used. Sent to at a stretch.

In the case of writing (data recording), the ATAPI
Alternatively, data sent from the host computer through the host I / F 10 such as SCSI is temporarily stored in the memory 9 by the memory manager 8. Write operation (recording operation) when a certain amount of data is stored in the memory 9
Before that, the laser spot of the laser beam must be positioned at the data write start point (data write start position) on the optical disc 20.

The data write start position is obtained based on a wobble signal which is previously engraved on the meandering track formed on the optical disk 20. The wobble signal contains absolute time information called ATIP,
The ATIP decoder 11 can extract the absolute time information.

The synchronizing signal generated by the ATIP decoder 11 is input to the CD encoder 12, and enables writing of data at an accurate position. The data in the memory 9 is stored in the CD-ROM encoder 13 or the CD encoder 1
In step 2, an error correction code is added and interleaved.
The data is recorded on the optical disk 20 via the LD driver 14 and the optical pickup 4 which are laser control circuits.

The write gate control unit 15 determines whether or not the semiconductor laser emits light at the write power. The write gate control unit 15 performs a normal write (data recording)
In the case of (1), the write start output from the CD encoder 12 is used as it is as the write gate. In the case of the recovery operation, the write gate is controlled so that the write gate becomes active at the actual write start point.

The disk management information storage section 16 is a place for storing disk information such as TOC and PMA. By changing this information, an optical disk for which data writing has failed can be treated as a blank disk.
The system controller 18 includes a CPU, ROM, and RA.
M is realized by a microcomputer consisting of
The data recording process according to the present invention is executed by controlling the above-described units.

That is, the above optical disk drive device corresponds to an optical disk recording device for recording data spirally or concentrically on an optical disk. A data recording unit management unit that stores and manages a recording unit of data that has failed to be written to the optical disk as unwritten, and a data that detects a data write failure position where the data writing of the optical disk has failed. The write failure position detecting means and, when rewriting the failed data, start the recording operation in synchronization with the data signal written to the optical disc from the beginning of the data, and detect by the data write failure position detecting means. The recording operation is performed without performing actual data writing up to the data writing failure position, and the function of a recording operation control unit that performs a recording operation for performing actual data writing is performed from the data writing failure position.

Search means for searching for a data write failure position in frame units, and means for setting the data write failure position in frame units detected by the search as a data write start position when rewriting data. ,
When a data rewrite setting command is received, a search for the data write failure position is started, and data is written so as to overwrite a data write frame in which data write based on the detected data write failure position has failed. It functions as a means for performing a rewrite operation.

Means for detecting a data write failure position during a recording operation in which actual data write is not performed;
It functions as a means for performing a recording operation at the time of data rewriting without previously searching for a data writing failure position.

A means for performing an encoding operation in synchronization with a signal of data reproduced during a recording operation in which actual data writing is not performed, and a method for forming a seam of data at the time of data re-recording with high positional accuracy. Acts as a means to do.

Further, a function of means for performing encoding based on a PLL clock generated by a PLL constituted by a low-frequency control loop based on a crystal oscillation clock and a high-frequency control loop based on an EFM reproduction clock. Fulfill.

Alternatively, encoding is performed based on a PLL clock generated by a PLL constituted by a low-frequency control loop based on a crystal oscillation clock and a high-frequency control loop based on an EFM frame sync clock. Perform the function of

Next, a description will be given of a recovery operation when the power of the host computer (PC) and the optical disk drive is turned off while writing five music data in the disk-at-once (DAO) manner.

The user sets five WAV files of the music to be created in the CD-R mastering software. Select DAO to write mode, and select music data (Audio)
Start writing by creating. Here, for example, it is assumed that a power failure occurs while writing the third piece of music, and the track is restored five minutes later.

The host computer (PC) is restarted, and the optical disk drive in which the writing has failed is contained in the optical disk drive. However, since the writing of the TOC has been completed before the power failure, the optical disk drive has a capacity of 5 bytes.
It is assumed that the music CD of the song is normally mounted.

However, in this case, even if an attempt is made to reproduce the fifth tune, it cannot be reproduced. Therefore, the user starts the CD-R mastering software again, and sets the same file and write mode as before the data writing failed. Then, a recovery setting instruction is issued.

The CD-R mastering software sends a recovery setting command in which parameters are set so that the entire optical disk is treated as a blank to the optical disk drive.
The optical disk drive rewrites the disk management information in the disk management information storage unit 16 so that the currently mounted optical disk 20 becomes a blank disk, and detects the end of the recorded data.

The actual write start position is set in the write gate control, and the start control of the CD encoder 12 is set so as to operate not on the ATIP basis but on the EFM basis, and the recovery setting command ends.

FIG. 2 is a flowchart showing the above-described data recording process in the optical disk drive shown in FIG.

In step (indicated by "S" in the figure) 1, it is determined whether or not a command has been received. If received, it is determined in step 2 whether or not the command is a recovery setting command. The disk management information such as TOC and PMA is changed so that the track, session or optical disk specified by the host (computer) is treated as a blank.

If the end of the data recorded on the optical disk is detected in step 4 and the setting for retry such as the setting of the actual writing position is performed in step 5, the process returns to the initial processing.

If it is determined in step 2 that the command is not a recovery setting command, it is determined in step 6 whether or not the command is a write command. If the command is a write command, normal write command processing is executed in step 7 and the process returns to the initial processing. If it is not a write command in the judgment in step 6, the processing of other corresponding commands is executed in step 8, and the process returns to the initial processing.

Next, the user can make the audio data as before the failure.
Start writing by creating. The data sent from the host computer to the optical disk drive is exactly the same as the last time, and the encoded data generated by the optical disk drive is also the same.

The optical disk drive device uses the optical disk 2
Data writing is started so as to trace data already written to 0. However, since the write gate control unit 15 is disabled at first, actual data writing is not performed. In other words, it is like a test light.

Then, when the power reaches the position where the power failure of the third tune occurs, that is, the end position detected by the recovery setting command, the write gate control unit 15 enables the write gate, and the actual data writing is performed here. And the writing ends normally until the end.
In this way, it is possible to recover the optical disk 20 for which data writing has failed due to power interruption.

FIG. 3 is a waveform diagram showing a general subcode synchronization signal. SubQ shown in FIG.
It is composed of a synchronization pattern of S0 and S1 and 96-bit data of Q0 to Q95.

SBSY shown in (b) of the figure means a subcode block sync, indicates the head of a subcode block, and is output for each sector. SFSY shown in (c) of the figure means a subcode frame sync, and is the same as an EFM frame sync.

SBSY and SFSY have a supplementary function for improving the signal quality, but the function can be cut off by setting. It is also possible to select whether to synchronize with EFM or with encoded data.

FIGS. 4 and 5 are block diagrams showing a circuit configuration for starting actual writing in EFM frame units according to the second aspect of the present invention. The counter 22 shown in FIG. 4 is an 8-bit up counter that can be referred to by the system controller 18 and has a clock terminal for detecting a rising edge and a clear terminal. SFSY is input to the clock terminal, and SBSY is input to the clear terminal.

This counter 22 always indicates the frame number being read. And when searching for the termination, SBS
When Y and SFSY are set without complementing the EFM synchronization and the end sector is read, the counter 22 stops when the RF signal is lost, and it is determined how many frames of data have been written.

FIG. 5 is a block diagram showing the internal configuration of the write gate control unit 15 for starting actual writing in frame units. The target setting address count 31 and the target setting frame count 32
Reference numeral 8 denotes a down counter that can set an initial value.

The system controller 18 calculates the number of sectors from the false write start position to the obtained end position and sets the calculated target end address count 31. Further, the frame number obtained by the counter 22 shown in FIG.

When a write start signal is input from the CD encoder 12, the target set address count 31 is decremented by the encode block sync. And 0
, The counter 22 stops and outputs a signal to the target setting frame count 32.

The target setting frame count 32 receives the signal and starts subtraction by the encode frame sync. Then, when the value becomes 0, the counter 22 stops, and the output signal thereof is ANDed with the write start signal by the AND circuit 30 to become the write gate.

FIG. 6 is a block diagram showing the internal configuration of the write gate control unit 15 for detecting during the false writing that the RF has disappeared according to the third aspect of the present invention and shifting to the actual writing. is there. Light gate control unit 15
When an RF signal is input to the controller, a peak value and a bottom value are sampled in real time by a peak / bottom hold (circuit) 41.

From the value, the amplitude determination section 42 determines whether or not RF is present. Once it is determined that there is no RF, its output is held in the gate enable 43, and the output of the gate enable 43 and the write start signal are ANDed by the AND circuit 40 to become a write gate.

FIG. 7 is a block diagram showing a configuration of a system clock generating circuit of the CD encoder 12 according to the fifth aspect of the present invention. This is a clock generation circuit based on PLL control.
The feature is that there are two systems of 0 and EFM bit clock.

The first phase comparator 51 compares the phase of the clock of the crystal oscillator 50 with the phase of the clock generated by the VCO 58, and compares the difference signal with the first low-pass filter (first LP).
F) The frequency of the VCO 58 is controlled through 52.
The cutoff frequency of the first LPF 52 is set to a sufficiently low value.

On the other hand, the second phase comparator 53 compares the phase of the EFM bit clock with the phase of the clock generated by the VCO 58, and outputs the difference signal to the second low-pass filter (second L
The frequency of the VCO 58 is controlled through a PF 54 and a high-pass filter (HPF) 55.

The cutoff frequency of the second LPF 54 is the first
The band is set higher than that of the LPF 52 and can follow the EFM bit clock fluctuation due to the eccentricity. HPF55,
This is for cutting a band that hinders control on the crystal oscillator 50 side. The output of the HPF 55 is combined with the VCO control signal of the crystal oscillator 50 by the adder 57 through the SW 56.

The SW 56 is turned on / off (ON / OFF) by the write gate, and when the actual writing is started, the EF is turned on.
The PLL on the M-bit clock side is disconnected. This circuit is for synchronizing the encode EFM and the disk EFM, and can be synchronized only by the PLL of the EFM bit clock. However, during the data write operation, the spindle motor 1 follows the encode block sync. Operation becomes unstable due to control.

Therefore, the base of the encode clock is generated by the crystal oscillator 50, a variable component that cannot be followed by the spindle motor 1 is extracted from the EFM bit clock, and the encode clock is changed to stabilize the EF.
An M synchronous circuit can be realized.

FIG. 8 is a block diagram showing a configuration of a system clock generating circuit of the CD encoder 12 according to the sixth aspect of the present invention. This system clock generation circuit is different from the system clock generation circuit shown in FIG. 7 in that the EFM bit clock is the EFM frame sync clock.

The EFM frame sync clock is EFM
Since the frequency is 1/588 of the bit clock, VCO5
8 is divided by 588 and input to the second phase comparator 53. Also, the characteristics of the filter are adjusted accordingly.

The system clock generation circuit shown in FIG. 7 is based on the premise that the EFM bit clock fluctuates around the frequency of the crystal oscillator 50 at a fast cycle of about the eccentric frequency.

Here, if the EFM bit clock includes a fluctuation with a slow period, the PLL lock is lost, and the deviation between the encode EFM and the disk EFM is integrated. If the false write is long, the error becomes large. Very problematic. Therefore, the lock is hardly lost by synchronizing with the EFM frame sync clock having a lower frequency than the EFM bit clock.

The optical disk drive of this embodiment can rescue a write-failed medium (optical disk) due to power-off or the like. Further, the difference between the write interruption position and the write start position can be made smaller, and the data quality at the joint can be improved. Furthermore, the operation of detecting the write end position performed in advance can be omitted, and the performance can be improved.

Also, the disc EFM and the encoded EFM
Can be made smaller and the data quality at the seam can be improved. Further, errors due to eccentric fluctuations can be absorbed. Furthermore, errors due to variations other than eccentricity can be widely absorbed.

Next, another embodiment of the present invention will be described. The optical disk drive of this embodiment has substantially the same configuration as the optical disk drive of the above-described embodiment shown in FIG. 1, but differs in the configuration of an optical pickup for irradiating an optical disk with laser light.

The optical pickup 4 has a first laser light irradiating section for irradiating a light spot for writing information to the optical disk, and a light spot for irradiating the information on the optical disk prior to the light spot irradiating by the first laser light irradiating section. A second method of irradiating a preceding light spot for detecting a writing failure position
And a laser beam irradiation unit.

Further, the second laser beam irradiating section is separated from the recording track of the optical disk by (n + 1/2) Tp times (where n is an integer value and Tp is the track pitch) in the radial direction to detect a write failure position. The preceding light spot is irradiated.

Further, the second laser beam irradiating unit irradiates a preceding light spot for detecting a write failure position on an outer periphery of a recording track on the optical disk on which the first laser beam irradiating unit irradiates a light spot for writing information. I am trying to do it.

Then, a data write failure position where data writing on the optical disk has failed is detected by a preceding light spot for detecting a write failure position irradiated by the second laser light irradiation unit.

More specifically, the optical pickup 4 irradiates a first irradiating means for irradiating a light spot for writing information on an optical disk with the first irradiating means, and detects an unsuccessful position for writing information on the optical disk prior to the irradiating light spot by the means. Function as a second irradiating means for irradiating the preceding light spot.

Next, a disk at once (DA) in an optical disk drive according to another embodiment of the present invention will be described.
A description will be given of a recovery operation when the power of the host computer (PC) and the optical disk drive is turned off while the music data of five songs is being written in O).

The user sets five WAV files of the music to be created in the CD-R mastering software. Select DAO to write mode, and select music data (Audio)
Start writing by creating. Here, for example, it is assumed that a power failure occurs while writing the third piece of music, and the track is restored five minutes later.

The host computer (PC) is restarted and the optical disk drive 20 contains the optical disk 20 for which writing has failed. However, since the writing of the TOC has been completed before the power failure, the optical disk drive 5
It is assumed that the music CD of the song is normally mounted.

However, in this case, even if an attempt is made to reproduce the fifth tune, it cannot be reproduced. Therefore, the user starts the CD-R mastering software again, and sets the same file and write mode as before the data writing failed. Then, a recovery setting instruction is issued.

The CD-R mastering software sends a recovery setting command in which parameters are set such that the entire optical disk is treated as a blank to the optical disk drive.
The optical disk drive rewrites the disk management information in the disk management information storage unit 16 so that the currently mounted optical disk 20 becomes a blank disk.

Then, the write gate is disabled and the write gate control is set until the end position of the data detected by the preceding light spot irradiated from the second laser light irradiation section of the optical pickup 4 is reached.
The operation is set based on the EFM standard instead of the TIP standard, and the recovery setting command ends.

FIG. 9 is a flowchart showing the above-described data recording process in the optical disk drive.

In step (indicated by "S" in the figure) 11, it is determined whether or not a command has been received.
It is determined in step 2 whether or not the command is a recovery setting command. If the command is a recovery setting command, the disc management information such as the TOC and PMA is changed in step 13 so that the track, session or optical disc specified by the host (computer) is treated as a blank. I do.

In step 14, the end of the data recorded on the optical disk by the preceding light spot is detected, and when the setting for retry such as setting of the actual writing position is performed, the process returns to the initial processing.

If it is determined in step 12 that the command is not the recovery setting command, it is determined in step 15 whether or not the command is a write command. If the command is a write command, normal write command processing is executed in step 16 and the process returns to the initial processing. If it is determined in step 15 that the command is not a write command, step 1
At step 7, the processing of other corresponding commands is executed, and the process returns to the initial processing.

[0105] Next, the user, as before the failure, can set the Audio
Start writing by creating. The data sent from the host computer to the optical disk drive is exactly the same as the last time, and the encoded data generated by the optical disk drive is also the same.

The optical disk drive device uses the optical disk 2
Data writing is started so as to trace data already written to 0. However, since the write gate control unit 15 is disabled at first, actual data writing is not performed. In other words, it is like a test light.

Then, when the power reaches the position where the power failure of the third music has occurred, that is, the end position detected by the preceding light spot, the write gate control unit 15 enables the write gate and the actual data writing is performed. And the writing ends normally until the end.
In this way, it is possible to recover the optical disk 20 for which data writing has failed due to power interruption.

Next, with reference to FIG. 6, a description will be given of a process of detecting that RF has been lost due to the preceding light spot during false writing and shifting to actual writing. First, when an RF signal is input to the write gate control unit 15, the peak value and the bottom value are sampled in real time by the peak / bottom hold 41, and the amplitude determination unit 42 determines whether or not there is RF from the values.

If the amplitude determination section 42 once determines that there is no RF, the output is held in the gate enable 43, and the output from the gate enable 43 and the write start signal are ANDed by the AND circuit 40 to form a write gate. .

FIGS. 10 to 13 are schematic diagrams showing the relationship between recording pits written halfway on the optical disk, preceding light spots, and writing light spots. As shown in FIG. 10, when the preceding light spot 62 for detecting the writing failure position of the information is irradiated immediately before the same recording track 60 of the light spot 63 for writing the information, the RF signal is generated by the preceding light spot 62. You need to start writing as soon as you detect that is gone.

As shown in FIG. 11, the preceding light spot 62
Is irradiated on the recording track 60 adjacent to the information writing optical spot 63, the optical disk has one time to complete one rotation from the detection of the absence of the RF signal by the preceding light spot 62 to the start of writing. Therefore,
This is effective when the detection of the presence or absence of the RF signal is slow in the write gate control unit 15 shown in FIG.

As shown in FIG. 12, the leading light spot 62
Is shifted from the light spot 63 for writing information by a half track pitch, it is compatible with the push-pull method, which is a typical track detection method of an optical disk drive.

As shown in FIG. 13, the preceding light spot 62
Is irradiated with a shift of the information writing light spot 63 by 1 + ／ track pitch, that is, the recording track 60 and (n + ／) Tp times (where n =
Also, when irradiation is performed with a shift of 1, Tp (track pitch), it is compatible with the push-pull method, which is a typical track detection method of an optical disk drive. Further, FIG.
After the write gate controller 15 detects that the RF signal has disappeared, there is a margin for the optical disk to make one rotation from when the writing is started.

In this manner, the optical disk drive of this embodiment can rescue a write-failed medium due to power-off or the like, and it is not necessary to know in advance where the failure has occurred. Further, it is possible to use a sub-spot used in an operation push-pull method, which is a typical track detection method of an optical disk drive device, as a preceding light spot, which is highly practical. Further, a data write failure point can be quickly detected.

[0115]

As described above, according to the optical disk recording apparatus of the present invention, even if data recording fails due to power-off of the optical disk, the optical disk can be rescued.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall configuration of an optical disk drive which is an embodiment of an optical disk recording apparatus according to claims 1 to 6 of the present invention.

FIG. 2 is a flowchart showing the above-described data recording process in the optical disc drive shown in FIG.

FIG. 3 is a waveform diagram showing a general subcode synchronization signal used for explaining the operation of the optical disk drive shown in FIG. 1;

FIG. 4 is a block diagram showing a circuit configuration for starting actual writing in EFM frame units according to the second aspect of the present invention.

FIG. 5 is an EF according to claim 2 of the present invention.
FIG. 3 is a block diagram illustrating a circuit configuration for starting actual writing in units of M frames.

FIG. 6 is a block diagram showing an internal configuration of a write gate control unit 15 for detecting that RF has been lost during false writing and shifting to actual writing according to the third aspect of the present invention.

FIG. 7 is a block diagram showing a configuration of a system clock generation circuit of the CD encoder 12 according to the fifth embodiment of the present invention.

FIG. 8 is a block diagram showing a configuration of a system clock generation circuit of the CD encoder 12 according to the sixth embodiment of the present invention.

FIG. 9 is a flowchart illustrating the above-described data recording process in the optical disc drive device according to another embodiment of the present invention.

FIG. 10 is a schematic diagram showing a relationship between recording pits written halfway on an optical disc, a preceding light spot, and a writing light spot.

FIG. 11 is a schematic diagram showing a relationship between a recording pit, a preceding light spot, and a writing light spot which are similarly written halfway on the optical disc.

FIG. 12 is a schematic diagram showing a relationship between recording pits, a preceding light spot, and a writing light spot which are similarly written halfway on an optical disk.

FIG. 13 is a schematic diagram showing a relationship between a recording pit, a preceding light spot, and a writing light spot which are also written halfway on the optical disk.

[Explanation of symbols]

 1: spindle motor 2: motor driver 3: servo processing unit 4: optical pickup 5: read amplifier 6: CD decoder 7: CD-ROM decoder 8: memory manager 9: memory 10: host I / F 11: ATIP decoder 12: CD encoder 13: CD-ROM encoder 14: LD driver 15: Write gate control unit 16: Disk management information storage unit 17: Encode clock generation unit 18: System controller 20: Optical disk 21: Subcode 22: Counter 30, 40: AND Circuit 31: Target setting address count 32: Target setting frame count 41: Peak bottom hold 42: Amplitude determination unit 43: Gate enable 50: Crystal oscillator 51: First phase comparator 52: First LPF 53: Second phase comparator 54 : Second LPF 55: HPF 56: SW 57: Adder 58: VCO 59: 1/588 60: Recording track 61: Recording pit 62: Preceding light spot 63: Light spot for writing information

 ──────────────────────────────────────────────────続 き Continued on front page F term (reference) 5D044 BC05 CC06 DE03 DE12 DE17 DE23 DE29 DE39 DE54 EF03 GK05 HH07 JJ03 5D090 AA01 BB04 CC01 CC02 DD03 EE05 FF26 FF33 HH02 5D119 AA21 BA01 BB02 DA01 DA03 DA13 DA15 EC05 FA05

Claims (9)

[Claims] 1. An optical disk recording apparatus for recording data spirally or concentrically on an optical disk, comprising: a data recording unit management means for storing and managing a recording unit of data that has failed to be written on the optical disk as unwritten; A data write failure position detecting means for detecting a data write failure position in which data writing on the optical disk has failed; and when rewriting the data on which the write has failed, the data written from the beginning of the data to the optical disk. The recording operation is started in synchronization with the signal, and the recording operation is performed without actually performing data writing until the data writing failure position detected by the data writing failure position detecting means. And recording operation control means for performing a recording operation for actually writing data. Optical disk recording device. 2. The optical disk recording apparatus according to claim 1, wherein a search means for searching for the data write failure position on a frame basis, and a data write failure position on a frame basis detected by the search by the means. Means for setting a data writing start position at the time of rewriting,
When a data rewrite setting command is received, a search for the data write failure position is started, and data is written so as to overwrite a data write frame in which data write based on the detected data write failure position has failed. An optical disc recording apparatus characterized by performing a rewriting operation. 3. The optical disk recording apparatus according to claim 1, further comprising means for detecting the data write failure position during a recording operation in which the actual data write is not performed, and searching for the data write failure position in advance. An optical disc recording apparatus characterized in that a recording operation at the time of data rewriting is performed without performing. 4. The optical disk recording apparatus according to claim 1, wherein the encoding operation is performed in synchronization with a signal of data reproduced during a recording operation in which the actual data writing is not performed. An optical disc recording apparatus characterized in that a seam of data at the time of data re-recording is formed with high positional accuracy. 5. The optical disk recording apparatus according to claim 4, wherein the low frequency control loop based on the crystal oscillation clock and the EFM
An optical disc recording apparatus, wherein the encoding is performed based on a PLL clock generated by a PLL configured by a high frequency control loop based on a reproduction clock. 6. The optical disk recording apparatus according to claim 4, wherein the low-frequency control loop based on the crystal oscillation clock and the EFM
An optical disk recording apparatus, wherein the encoding is performed based on a PLL clock generated by a PLL configured by a high-frequency control loop based on a frame sync clock. 7. An optical disk recording apparatus for spirally or concentrically recording data on an optical disk, comprising: first irradiating means for irradiating a light spot for writing information on the optical disk; A second irradiating means for irradiating a preceding light spot for detecting a position at which information writing has failed on the optical disc; and a data recording unit for storing and managing a recording unit of data failed to be written on the optical disc as unwritten Management means; data write failure position detection means for detecting a data write failure position at which data writing on the optical disk has failed by the preceding light spot for write failure position detection irradiated by the second irradiation means; When rewriting failed data, the optical data is rewritten from the beginning of the data. A recording operation is started in synchronization with a signal of data written to the disk, and a recording operation is performed without actually writing data up to a data write failure position detected by the data write failure position detection means, An optical disc recording apparatus, comprising: a recording operation control means for performing a recording operation for actually writing data from the data write failure position. 8. The optical disk recording apparatus according to claim 7, wherein the second irradiating means is used to detect a write failure position at a distance of (integer value + ／) times the track pitch of a recording track of the optical disk. An optical disk recording apparatus characterized in that a preceding light spot is irradiated. 9. The optical disk recording apparatus according to claim 7, wherein the second irradiating means is located on an outer periphery of a recording track on the optical disk to which a light spot for writing information is irradiated by the first irradiating means. An optical disc recording apparatus characterized by irradiating a preceding light spot for detecting a writing failure position.