JP2001266460A - Disk recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avert the situation that the reproducing of a recording area of the recording data corresponding to the track information to a track information memory area is infeasible by a recording failure of the track information. SOLUTION: This device has a recording failure judging means 17 which judges a recording failure state by detecting the error during recording of a tack information memory area and a close control means 18 which controls the execution of close processing according to the recording failure judgment by the recording failure fudging means 17. When the recording failure state in the tack information memory area occurs, the device stops the recording to the tack information memory area and forcibly executes the close processing of the recording area of the recording data recorded in the program area by recording the track information stored in the tack information memory 16 as TOC data. As a result, the situation that the recording failure of the recording data recorded thus far occurs is averted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for temporarily recording track information relating to recording data recorded in a program area in a track information storage area until the recording area of the recording data is closed. The present invention relates to a disc recording apparatus in which track information recorded in a track information storage area is recorded as TOC data in a lead-in area.

[0002]

2. Description of the Related Art There is known an optical disk recording apparatus which performs recording by changing the reflectance of a recording layer of an optical disk by irradiating a light beam from an optical head. So-called write-once (writ) that cannot physically erase erased data
e-once) CD (Compac
t Disc) family CD-R (Recordable) drive devices are well known.

The recording format of a CD-R includes a PMA (Program Memory A) toward the inner circumference of a program area for recording actual recording data on a disk.
rea) and a data structure in which a PCA (Power Calibration Area) is sequentially formed.

The PMA is a track information storage area for temporarily recording track information relating to recording data recorded in a program area until a recording area (for example, a session) of the recording data is closed. Is a test writing area for setting an optimum recording level of a light emission output emitted from the optical head during recording.

In the CD-R drive device, lead-in and lead-out are formed before and after a recording area of recording data recorded on a disc, and a closing process is performed. At the time of the closing process, the data is recorded in the PMA. Based on the track information, TOC (Table
Of Contents) data is recorded.

Therefore, if the TOC data cannot be recorded in the lead-in area, the recording area of the recording data is not closed, and the recording data in the recording area cannot be reproduced.

[0007] One of the serious causes that TOC data cannot be recorded is that recording of track information in the PMA fails.

[0008]

In most of the conventional CD-R drive devices, no measures are taken when a track information recording error occurs in the PMA.
When the recording of the track information in the MA fails, the recording area of the recording data corresponding to the track information cannot be reproduced.

Further, as disclosed in Japanese Patent Application Laid-Open No. 9-82039, a CD-R drive apparatus has been proposed in which a failure in recording track information on a PMA is repaired. It is necessary to search for the failed position, record the track information from the failed recording position, and continuously record the track information before and after the recording failure.

In order to continuously record track information before and after a recording failure, it is necessary to search for a recording failure position with high precision, and to start recording from the recording failure position with high precision. This requires high-precision control, which is difficult to implement and causes high costs.

[0011]

SUMMARY OF THE INVENTION According to the present invention, there is provided a non-recordable judging means for detecting an error during recording in a track information storage area and judging a non-recordable state, and according to the non-recording judgment by the non-recordable judging means. Closing control means for controlling execution of a closing process, wherein when a recording disabled state occurs in the track information storage area, recording in the track information storage area is stopped, and the track information stored in the track information memory is deleted. The TOC data is recorded directly in the lead-in area, and the recording area of the recording data recorded in the program area is forcibly closed. As a result, it is possible to avoid a situation in which the recorded data that has been recorded so far cannot be reproduced, at the expense of additionally writing the recorded data of a new track in the closed closed recording area.

[0012]

FIG. 1 is a circuit block diagram showing an embodiment of a CD-R drive as a disk recording apparatus according to the present invention.

In FIG. 1, reference numeral 1 denotes an optical head which emits a laser beam for tracing a signal track of a disk and writes and reads recording data on the disk.

2 amplifies an RF signal (radio frequency signal) of a received light output obtained by the optical head 1, and amplifies the RF signal.
An RF amplifier 3 for binarizing the signal and a decoder 3 for decoding the binarized data of the RF signal output from the RF amplifier 2 in synchronization with a bit clock in accordance with a data structure prescribed in the CD system.

Reference numeral 4 denotes an interface for controlling the transfer of data to and from a host device such as a personal computer or an audio source device which is connected to the outside via a connection terminal 5. Reference numeral 6 denotes a device for recording input data input to the interface 4 on a disk. This is an encoder that modulates into recording data having a data structure specified in the CD system.

Numeral 7 caches input data input by the interface 4 and is used when the encoder 6 modulates recording data to be recorded on the disk, caches data read from the disk, and decodes the data by the decoder 3. This is a buffer RAM used when demodulating data.

Reference numeral 8 denotes a head output control circuit for generating a control output for controlling a laser beam generated from the optical head 1 based on the recording data output from the encoder 6, and 9 denotes a control output from the head output control circuit 8. A laser drive circuit 10 for driving a laser light source of the optical head 1 to perform recording on the disk in accordance with the condition (1), by tracing a pre-groove formed in advance on an unrecorded disk with the optical head 1 and via the RF amplifier 2 The wobble decoder extracts a 22.05 kHz wobble component from the obtained pregroove signal. The wobble decoder 10 extracts ATIP (Absolute Time In P
An ATIP demodulation circuit 11 for demodulating re-groove is provided.

Numeral 12 is a disk motor for driving the disk to rotate, and numeral 13 is a motor servo circuit for controlling the drive of the disk motor 12. The motor servo circuit 13 can control the rotation by the constant linear velocity when reproducing the disk on which the signal is recorded at the constant linear velocity, and can control the rotation by the constant angular velocity. At the time of recording, the rotation of the disk is controlled using the wobble component extracted by the wobble decoder 10.

Reference numeral 14 denotes a system control circuit for performing system control relating to recording and reproduction of a disk. The system control circuit 14 includes a track information management unit 15 that manages track information relating to recording data to be recorded in the program area, a track information memory 16 that stores track information managed by the track information management unit 15,
It comprises a recording disable determination means 17 for detecting an error during the recording of the MA and determining a recording disabled state, and a close control means 18 for controlling execution of a closing process in accordance with the determination of the recording failure by the recording disable determination means 17. ing.

Next, the recording operation of the disk recording apparatus thus configured will be described.

When data for requesting recording is transmitted from the host device connected to the connection terminal 5, the data is received by the interface 4 and written into the buffer RAM 7.

When the amount of data stored in the buffer RAM 7 reaches the data capacity at which the encoder 6 starts encoding, data is read from the buffer RAM 7 and the encoder 6 performs EFM (Eight to Fou).
(Rteen Modulation) This is modulated into recording data (EFM data) in a form to be recorded on the disk in frame units.

A laser drive circuit 9 is controlled by a head output control circuit 8 based on the recording data output from the encoder 6, and a light emission output set by the head output control circuit 8 is used based on the recording data from the encoder 6. The laser light source of the optical head 1 is driven by the laser driving circuit 9, and the recording data is recorded on the disk.

By the way, when a disc is recorded in the program area, the track information management means 15 determines the sub-code address corresponding to the recording data generated by the encoder 6 at the time of recording the disc and the input data inputted to the encoder 6. Track information is extracted based on the start address and end address of the track being recorded and the control data, and the track information is stored and managed in the track information memory 16.

When the disk recording is completed on a track basis, the track information corresponding to the track on which the recording has been completed is recorded in the PMA. When the session of the recorded data recorded so far is closed on the track of the recorded data recorded on the disc, the closing control means 1
8, the track information recorded in the PMA is reproduced, TOC data is created based on the reproduced track information, the TOC data is recorded in the lead-in area, and a lead-out area is created, The session is closed.

Next, the detection of the unrecordable state of the PMA will be described.

During the recording of the PMA, the recording disable determination means 17 detects the detection timing of the ATIP synchronization signal demodulated by the ATIP demodulation circuit 11 and the subcode contained in the track information recording data output from the encoder 6. Of the synchronization signal is generated, and an error during the recording of the PMA is detected when the measured time deviation is out of a preset allowable range.

In this case, it is detected that recording cannot be performed due to a synchronization deviation between an ATIP synchronization signal that should be synchronized within a predetermined allowable range and a subcode synchronization signal included in recording data. With the increase in the recording speed, it is possible to cope with a state in which recording cannot be performed due to uneven rotation of the disk due to insufficient acceleration / deceleration torque of the disk motor 12.

Further, during the execution of the PMA recording, the recording disable determination means 17 counts the number of times that the error of the ATIP address detected by the CRC check circuit 19 provided in the ATIP demodulation circuit 11 occurs continuously, An error during recording of the PMA is detected by detecting that the number of times has reached the number of times set as the recording disabled state in advance.

Further, the recording disable judging means 17 monitors the continuity of the ATIP address demodulated by the ATIP demodulation circuit 11 and detects an error during recording of the PMA due to a track jump. These correspond to a state where recording cannot be performed due to an error in the ATIP address.

When the recording failure determination means 17 determines that the recording of the PMA has failed, the close control means 18 operates. In this case, the track information recorded in the PMA is stored in the track information memory 16 without being reproduced. TOC data is created based on the track information to be recorded, the TOC data is recorded in the lead-in area, a lead-out area is created, and the session is closed.

Here, the track information stored in the track information memory 16 is erased when the power is turned off and when the disc is unloaded, and is preserved while recording is continued on the same disc. PMA
When the session is closed due to the recording failure, the track information memory 16 stores all the track information of the recording data stored in the program area so far on the recording disk. Therefore, TOC data generated based on all track information of the session is recorded in the lead-in area where the session is closed, and the session is correctly closed.

Therefore, even if the recording of the PMA fails, the session is closed and the session is prevented from being unreproducible.

That is, in the case of multi-session recording,
It is possible to reproduce up to the recorded data recorded on the disc up to the last track of the session forcibly closed due to the failure of the PMA recording.

Similarly, in the case of a single session recording of a disc at once such as a music CD-R, the PM
Until the session is forcibly closed due to the failure of the A recording, reproduction up to the recording data of the last track recorded on the disc becomes possible.

[0036]

As described above, the present invention forcibly closes the recording area of the recording data when the unrecordable state occurs in the track information storage area. The session including the track corresponding to the track information can be closed, and the recorded data recorded in the session can be reproduced.

An error during the recording of the track information storage area may be caused by a time difference between the timing at which the synchronization signal of the recorded address of the disc is detected and the timing at which the synchronization signal of the subcode is generated. Since the detection is performed by being out of the range, it is suitable for detecting a recording error in the track information storage area in high-speed recording.

Furthermore, since an error in the recorded address of the disk is detected and an error during recording in the track information storage area is detected, the recorded address cannot be read during high-speed recording even when the head servo is normal. However, a recording error in the track information storage area can be detected in such a situation.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram showing an embodiment of a CD-R drive as an example for realizing a disk recording device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optical head 3 Decoder 4 Interface 6 Encoder 10 Wobble decoder 11 ATIP demodulation circuit 15 Track information management means 16 Track information memory 17 Recording disable determination means 18 Close control means

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G11B 20/18 574 G11B 20/18 574H

Claims (3)

[Claims] 1. A recording method according to claim 1, wherein track information relating to recording data recorded in a program area is recorded in a track information storage area for temporarily recording when recording of a track of the recording data is completed, and a recording area for recording data is lead-in. A disc recording apparatus for generating TOC data based on track information recorded in the track information storage area when performing close processing by lead-out, and recording the TOC data in a lead-in area,
Track information management means for managing track information relating to recording data to be recorded in a program area; a track information memory for storing track information managed by the track information management means; and an error during recording of the track information storage area. Recording undetectable means for detecting and determining the unrecordable state; and closing control means for controlling the execution of the closing process in accordance with the unrecordable determination by the unrecordable determining means. When recording occurs, the recording in the track information storage area is stopped, the track information stored in the track information memory is directly recorded as TOC data in the lead-in area, and the recording area of the recording data recorded in the program area is recorded. Disc recording characterized by forcibly closing the disc Location. 2. The non-recordable determining means determines a timing at which a synchronization signal of a recorded address previously recorded on an unrecorded disk is detected and a synchronization signal of a subcode included in recording data to be recorded on the disk. The method according to claim 1, wherein a time lag from a timing of the occurrence is measured, and an error during recording of the track information storage area is detected when the measured time lag is out of a preset allowable range. 2. The disk recording device according to 1. 3. The recording disable determination means detects an error in a recorded address previously recorded on an unrecorded disk and detects an error during recording in a track information storage area. The disk recording device according to claim 1.