JP2003317388A - Disk recording device and disk recording method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To determine the recording address and recording position on an optical disk having a wobble phase modulation format by using a wobble reproduction signal and a track reproduction signal. <P>SOLUTION: A disk recording device detects address information on the disk and a synchronization signal for each of the wobble reproduction signal and track reproduction signal from the optical disk and, in accordance with each detecting state, selects address information necessary for determining the disk recording track and synchronizing timing necessary for determining the linking position. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc recording method and a disc recording device, and more particularly to a disc recording method and a disc recording device which are required when information is additionally recorded or rewritten on an optical disc recording medium.

[0002]

2. Description of the Related Art A DVD (Di
(Gital Versatile Disc), and recordable DVD-R, DVD + R, rewritable D as recording media that can record information.
VD-RW and DVD + RW have been developed in recent years. These discs are
For waviness (wobble) formed on the side of the recording track on the disc and carved pits (land pre-pits),
In order to specify the recording position (track) on the disc, the data forming the sync signal, address information and additional information is modulated and recorded.

A modulation method for the synchronization signal, address information, and additional information is described in, for example, Japanese Patent Laid-Open No. 2001-11.
As shown in 0061, there are LPP (land pre-pit) format and PM (wobble phase modulation) format. The LPP format is adopted for DVD-R and DVD-RW discs, and the PM format is adopted for DVD + R and DVD + RW. There is.

The PM format will be described with reference to FIG. FIG. 2 shows an example of the PM format. (A) is a wobble phase modulation method, and (b) is an ADIP (address in pre-gr) unit which is a constituent unit of information to be wobble phase modulated.
oove) word structure, relationship between 1 ECC block period which is a data recording unit of DVD and the number of ADIP words included in it, and
The frame structure in one sector, which is a unit of the ECC block, is shown, and (c) shows a rewriting and linking method of the ECC block unit performed on the recording track.

In (a), the wobble phase modulation part is a part where the phase is inverted by 180 degrees. In 93 wobble units, ADIP sync (4 wobble intervals) corresponding to the head of the ADIP word at the appearance interval of the phase modulation part, each data bit. The bit sync (1 wobble interval) and the data bit (2 wobble interval) at the head of the are distinguished, and 0 data and 1 data are distinguished from each other by the appearance interval of the data bit from the bit sync.

In (b), the ADIP word is composed of 52 bits, and is composed of 3 bytes of data 0 (fixed to 0) corresponding to the first ADIP sync and data 1 to 23, and specifies the track position on the disk. ADIP address, data 24-31
AUX (auxiliary) data consisting of 1 byte, data 3
It consists of 2 to 51 2.5 bytes, and consists of an error correction code that corrects the error contained in the restored 1 ADIP word. On the other hand, the ECC block period, which is the unit of recording on the disc, is configured to include four ADIP words, and the target EC
Access reliability to C block is secured. The structure of the ECC block will be described. The ECC block is composed of 16 sectors, which is an access unit at the time of reproduction, and further is composed of 26 frames, which are a synchronization unit at the time of reproduction with respect to the data amount of one sector, and are composed of a synchronization signal and modulation data. 1
A frame consists of a data amount of 1488T (T is a channel bit, which is a basic unit of the recording mark length on the disc, T = 26.16MHz), and a frame synchronization signal SY0 indicating the sector head is provided immediately after that in the head frame of one sector. It contains the data part ID for specifying the track position when playing the disc.

In the linking method in (c), dummy data for 8T is added before the ECC block containing the record information, and dummy data is recorded from the linking position (17th wobble position) at the end 8T of the previous ECC block. Start
The linking position (1
By stopping recording at the 7th wobble position), rewriting and additional recording are performed in ECC block units. The linking position is specified by the ADIP sync which is phase-modulated in wobble, the detection of data bits and the like, and the detection of ADIP address information.

[0008]

[Problems to be Solved by the Invention] Currently, DVD + R, DVD + RW
There are various types of write-once and rewritable discs including, but when rewriting and writing on these discs, the modulated address information is detected to identify the track position on the disc, and This is performed by specifying the reproduction wobble position, that is, the linking position by detecting the modulated synchronizing signal or the like. Therefore, defects such as dust and scratches attached to the disc hinder the detection of modulated sync signals, which leads to a decrease in the address detection rate and also affects the accurate identification of the linking position, causing the worst linking position to shift. It will be recorded as it is.

In the disk recorded in such a state, recording may be performed on a track different from the track position for recording, which may lead to destruction of the recorded data. Also, if the linking position is recorded incorrectly, the ECC block data in the vicinity of the linking may be partially destroyed at the time of reproduction, and a burst error may occur, which may make the reproduction impossible.

Therefore, the disk recording apparatus is required to rewrite and additionally write information on a disk having a defect even if the track position is specified by detecting the address and the linking position is specified accurately. is there.

Therefore, an object of the present invention is to provide a disk recording method and a disk recording apparatus that solve the above problems.

[0012]

DISCLOSURE OF THE INVENTION A disk recording apparatus for solving the above problems in the present invention is at least a first synchronization signal which is modulated into a reproduction wobble signal and indicates the head of a first data composition unit, and a data composition. Means for detecting the first address information included in the data structure, a second synchronization signal that is modulated into the reproduction track signal and indicates the beginning of the second data structure unit, and a means for detecting the second address information included in the data structure. When,
First selection means for the detection timing of the first synchronization signal and second synchronization signal or second address information detection timing; second selection means for the first and second detection addresses
The selection means, the selection detection timing from the first selection means, and the selection detection address from the second selection means identify the linking position while synchronizing with the wobble position on the disc, and the target recording track A control unit for performing recording control on the section is provided.

[0013]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a first embodiment of a data transfer method and a disk recording apparatus of the present invention.
In the figure, 1 is an optical disc of wobble phase modulation format,
Reference numeral 2 is an optical head for disk recording, 3 is a laser driver for generating recording pulses from modulated recording data, and 4 is a laser driver for controlling a semiconductor laser included in the optical head, and 4 is a difference signal from a photodetector of the optical head. The AFE (analog front end) 5 that reproduces the wobble signal for the upper track and reproduces the recording mark on the track recorded on the optical disc 1 detects the wobble phase modulation portion and sets the phase inversion period to 0, 1 or 2. Phase modulation part detection circuit that generates as a valued pulse, 6 measures the pulse width, detects ADIP sync of 4 wobble width, bit sync of 1 wobble width, detects data bit of 2 wobble width, and protects the appearance period for ADIP sync ADIP sync detection circuit for performing 7 to identify the beginning of the ADIP word by detecting the ADIP sync, and the appearance of the data bit 0 from the wobble position
Restores the word structure by judging data and 1 data,
ADIP address detection circuit for detecting and protecting ADIP address after error correction processing, 8 is SY0 included in track reproduction signal
A frame sync detection circuit that performs demodulation processing on frame data while detecting another frame synchronization signal, 9
Is a data section ID detection circuit that detects and protects the data section ID address from the demodulated data immediately after detection of the frame synchronization signal SY0 at the sector head, and 10 is the ADIP address obtained from the ADIP address detection circuit 7 On the other hand, an address selector for selecting an address in ECC block units excluding the lower 2 bits and an address in ECC block units excluding the lower 4 bits of the data section ID detection circuit 9, 11 is detected and protected by the ADIP sync detection circuit 6. ADIP sync timing, and a timing selector that selects the data section ID detection timing in the data section ID detection circuit 9, and 12 is a synchronization that controls output on / off of synchronization timing with respect to the selection output from the timing selector 11. The control circuit 13 performs the detection of the track for recording from the obtained ECC address and the start and end ECC addresses for the purpose of recording. , A recording control circuit for generating a recording control signal for a target recording section on the disc by synchronizing with a wobble position on a recording track and specifying a linking position according to a synchronization timing, and 14 an ECC for recording on the disc This is a modulation circuit that generates recording data suitable for recording on a disc, such as modulation processing, framing, and addition of a frame synchronization signal, for recording data in block units, and outputs the generated data according to a recording control signal.

An example of the address detection operation, the timing synchronization for specifying the linking position, and the recording control operation performed in the recording apparatus of FIG. 1 will be described with reference to FIGS.

FIG. 3 shows the AD in the disk recording apparatus of FIG.
The first recording method based on the ECC address obtained from the IP address and ADIP sync detection synchronization is shown, and is applied to recording on an unrecorded disc, additional recording on a recorded disc, and rewriting.

The PSN shown in the recording track in FIG.
Indicates an area of 1 ECC block unit, and the data section IDs for the 16 sectors included therein are 030000-
F, 030010 to F ... correspond. The ADIP address determination timing in the ADIP address detection circuit 7 is determined with a delay of 4 sectors from the ECC recording area. Address selector 10
The ECC address generated from the detected value of the ADIP address is output, and the recording control circuit 13 outputs the EC for the recording start and end purposes.
The recording section is detected by comparing with the C block address. FIG. 3 shows a recording section detection operation for the recording start ECC address 03001 and the recording end ECC address 03002.

On the other hand, ADIP performed by the ADIP sync detection circuit
The sync is detected 16 wobbles ahead of the 4-sector unit area in the ECC recording area. In the case of the first recording method, the output of the timing selector 11 is the ADIP sync detection timing after cycle protection. Further, the synchronization control circuit 12 outputs the synchronization timing until the recording start ECC block is reached after tracking on the optical disc 1, and the recording control circuit 13 synchronizes the recording timing counter in accordance with the synchronization timing. ,
Synchronize with the wobble position on the disc. Further, the recording section is detected and the recording timing counter value is shown in Fig. 2 (c).
Generates a recording control signal when the linking position of
Output of recording data to the modulation circuit 14 is controlled, and recording control to the optical disc 1 is performed.

FIG. 4 shows a second recording method by the ECC address obtained from the data section ID address and ADIP sync detection synchronization in the disk recording apparatus of FIG. Applies to postscript from position.

In FIG. 4, the data section ID detection circuit 9 detects the data section ID address value, and the address selector 10
In this case, the ECC address generated from the detected value of the data section ID address in this case is selected, and the ECC address selected in the recording control circuit 13 and the ECC for the recording start / end purpose are selected.
The recording section is detected from the address. The data section ID can be detected only in the reproduction section of the recorded track, and it is essential that the ECC address is acquired and the recording timing counter is synchronized in that section.

On the other hand, the recording timing is synchronized with the wobble position on the disc by synchronizing the recording timing counter in accordance with the ADIP sync timing as in the first recording method. Hereinafter, recording control on the optical disc 1 is performed by the same control as in the first recording method.

In the case of the first and second recording methods, there is a possibility that accumulation of wobble position deviation during recording may occur.
The synchronization control circuit may not control the output of the synchronization timing. It is conceivable that synchronization is performed by the ADIP sync detection timing with respect to the recording timing counter even during recording on the disc.

Further, the synchronization of the recording timing counter is AD
The use is not limited to using only the IP sync, and it is also possible to use the detection timing of the bit sync and data bit that are wobble phase modulated as the synchronization timing.

FIG. 5 shows an ECC address and a data part I obtained from the data part ID address in the disk recording apparatus of FIG.
The 3rd recording method by D detection timing synchronization is shown, and like this 2nd recording method, it is applied to rewriting to a recorded area and additional writing from a recorded position. In FIG. 5, the detection of the recording section is performed based on the detection of the data section ID address, as in the second recording method. On the other hand, the ID detection timing obtained from the data section ID detection circuit 9 is detected for, for example, 16 sectors in the ECC recording area. In this case, the output of the timing selector 11 is the data section ID
The detection end timing is selected, the recording timing counter is synchronized according to that timing, and
Recording control to the optical disc 1 is performed by the same control as the recording method of 1.

The data section ID can be detected only in the reproduction section of the recorded track, and it is essential that the ECC address is acquired, the synchronization timing is detected, and the recording timing counter is synchronized in that section. In the third recording method, it is possible to synchronize the recording timing counter using the frame synchronization signal SY0 indicating the beginning of the sector or another frame synchronization signal including SY0.

The synchronization with the recording timing counter is not limited to being performed only on the basis of the ID detection timing obtained from the data section ID detection circuit 9 or the detection of a frame synchronization signal such as SY0. When wobble reproduction is possible from the disc, it is possible to synchronize the recording timing counter in units of wobbles based on the binarized reproduction wobble signals and their detection timings. In this case, the synchronization accuracy of the wobble position on the disc and the recording timing counter is improved, and as a result, the linking position can be specified with high accuracy.

As described above, the first operation performed in the recording apparatus of FIG.
An example of the selection method for the first, second, and third recording methods will be described with reference to the flowchart in FIG.

In FIG. 6, after tracking on the optical disc 1, wobbles and tracks are reproduced (step 601). If the detection of the ADIP sync in the ADIP sync detection circuit 6 is stable (locked in) in step 601, the address selector 10 detects that the address has been detected from the address detection state in the ADIP address detection circuit (step 603). The selection signal in the timing selector 11 is controlled to select the first recording method (step 606). If the ADIP address is not detected in step 603, or if the ADIP address is not detected even after retrying by turning on the track again, from the address detection state in the data section ID detection circuit 9 (step 604) , If address detection is done, address selector 10, timing selector
The selection signal in 11 is controlled to select the second recording method (step 606). If the detection of the ADIP sync is not stable or not detected at step 602, the address is detected from the detection state of the data section ID address value, the data section ID detection timing or the detection state of the frame synchronization signal at step 605. When the detection and the timing detection are performed, the third recording method is selected in step 606, and the recording method selection processing ends. If it is determined in step 604 and step 605 that the address detection and the timing detection are not performed, the tracking is turned on again to perform a retry, or the area is treated as a non-recordable area (defective area), and another area on the optical disc 1 is treated. Recording is performed while performing the processing of steps 601 to 606 in the recording area of.

As described above, the selection of the first, second, and third recording methods is prioritized according to the detection states of the ECC address and the synchronization timing used in the recording control circuit 13. The order is not limited to this, and the disc recording device may select a recording method in advance before tracking on.

FIG. 7 shows a second embodiment, which is different from the disk recording apparatus of FIG.
Playback wobble signal from the ADIP address information, AD
The IP sync timing is detected, and the land pre-pit (L
The figure shows an example of a disc recording device when recording control is performed by converting to an LPP signal according to the (PP) format. Such a configuration is to configure a disc recording device capable of recording even on a wobble phase modulation format disc by adding various circuits before the LPP signal generation circuit in the recording device for the LPP format optical disc.

In FIG. 7, reference numeral 15 is an LPP in accordance with the LPP format according to the output ECC address of the address selector 10.
An LPP signal generation circuit that constitutes transfer data and synchronizes and outputs a pulsed LPP signal in accordance with the synchronization timing from the timing selector 11. Reference numeral 16 is an LPP reproduction signal and an LPP signal generation when the optical disc 1 is an LPP format optical disc. An LPP selector for selecting the LPP signal generated by the circuit 15,
17 is for the LPP signal output from the LPP selector 16,
This is an LPP detection circuit that detects the LPP synchronization signal and the modulated address information, and the description of the reference numerals that are the same as those in FIG. 1 will be omitted.

In FIG. 7, when the optical disc 1 is an LPP format disc, the LPP detection circuit detects the LPP sync signal modulated into the LPP reproduction signal from the optical disc 1.
Address information is detected. The recording control circuit 13 follows the detection timing and the address information and sets the LP on the disc.
The P position is synchronized with the recording timing counter, the recording section for the recording target track is detected, and the recording control signal for the linking position conforming to the LPP format optical disc is generated.

In FIG. 7, when the optical disk 1 is a disk of wobble phase modulation format, the LPP generation circuit 15 detects the synchronization timing, ECC, detected from the wobble reproduction signal or the track reproduction signal from the optical disk 1.
The data including the ECC address is modulated according to the LPP format from the address, and the synchronization timing and the LPP signal are synchronized and output. As the method of selecting the synchronization timing and the method of selecting the ECC address, the method described in the first embodiment is applied. The processing in the LPP detection circuit 17 and the recording control circuit 13 described above is performed on the generated LPP signal in the same manner, and recording is performed on the optical disc 1.

[0034]

According to the present invention, it is possible to specify the recording target track on the disk, the linking position, and the recording control for the disk in various states such as defects.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of a disk recording device.

FIG. 2 is a diagram showing a structure of a wobble phase modulation format.

FIG. 3 is a diagram showing a first recording method.

FIG. 4 is a diagram showing a second recording method.

FIG. 5 is a diagram showing a third recording method.

FIG. 6 is a flowchart showing a selection method of the first, second and third recording methods.

FIG. 7 is a diagram showing a second embodiment of the disk recording device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Optical disc, 2 ... Optical head, 3 ... Laser driver, 4 ... Analog front end, 5 ... Phase modulation part detection circuit, 6 ... ADIP sync detection circuit, 7 ... ADIP address detection circuit, 8 ... Frame sync detection circuit, 9 ... data section ID detection circuit, 10 ... address selector, 11 ... timing selector, 12 ... synchronization control circuit, 13 recording control circuit, 1
4 ... Modulation circuit, 15 ... LPP signal generation circuit, 16 ... LPP selector, 17 ... LPP detection circuit.

Continued front page    (72) Inventor Takahiro Sunada             292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa             Ceremony company Hitachi Image Information System (72) Inventor Takehiko Sekine             292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa             Ceremony company Hitachi Image Information System F-term (reference) 5D044 BC04 CC06 DE17 DE32 DE38                       EF02 GM26                 5D090 AA01 BB10 CC05 EE05 GG26

Claims (6)

[Claims] 1. A disk recording device for recording on an optical disk of wobble phase modulation format, comprising a first synchronization signal which is modulated into a reproduction wobble signal and which indicates the head of a first data constituent unit, and a data structure. First included
Address information detecting means, a second synchronizing signal that is modulated into a reproduction track signal and indicates the beginning of a second data structure unit, and a second address information detecting means included in the data structure. From the first selection means for the second synchronization signal or the second synchronization signal or the second address information detection timing, and the second selection means and the first selection means for the first and second detection addresses. From the selection detection timing of and the selection detection address from the second selection means, the linking position is specified while synchronizing with the wobble position on the disc, and the control means for performing the recording control for the target recording track section, A disk recording device comprising: 2. A disk recording method for recording on an optical disk of wobble phase modulation format, comprising a first sync signal which is modulated into a reproduction wobble signal and which indicates the beginning of a first data constituent unit, and a data structure. First included
Address information is detected and modulated into a reproduction track signal to detect a second synchronization signal indicating the beginning of the second data structure unit and second address information included in the data structure, and the first synchronization signal is detected. Select the signal detection timing and the second synchronization signal or the second address information detection timing, select the first and second detection addresses, and select the selection detection timing and the wobble on the disc from the selection detection address. A disk recording method characterized in that a linking position is specified while synchronizing with the position and recording is performed on a target recording track section. 3. The disc recording method according to claim 2, wherein the selection detection timing and the selection detection address are a first combination of a first synchronization signal and first address information, and a first synchronization signal and a first synchronization signal. The second combination according to the second address information, the second synchronization signal or the third combination according to the second address information detection timing and the second address information, and the first, second, and third combinations described above. A disk recording method characterized in that the linking position is specified while synchronizing with the wobble position on the disk according to the selection of the combination, and the recording control for the target recording track section is performed. 4. The disc recording method according to claim 3, wherein the selection of the first, second, and third combinations is performed by detecting the first synchronization signal and detecting the first address information. Is performed, the first combination is selected, the first synchronization signal detection is performed, and only the second address information is detected, the second combination is selected, the first combination is selected. A disk recording method, wherein the third combination is selected when the synchronization signal is not detected and the second address information is detected. 5. A recording method for an optical disc of wobble phase modulation format, which is modulated into a reproduction wobble signal, detects a sync signal indicating the beginning of a first data constituent unit, and is modulated into a reproduction track signal. The address included in the data unit 2 is detected, and the linking position is specified while synchronizing the detection timing of the synchronization signal with the wobble position on the disk from the detection address, and recording is performed on the target recording track section. A disk recording method characterized by performing control. 6. A method of recording on an optical disk of wobble phase modulation format, comprising: detecting a sync signal which is modulated into a reproduction track signal and indicating the head of a data structure unit; and detecting an address included in the data structure, and performing the synchronization. A disc recording method characterized in that a linking position is specified while synchronizing a detection timing of a signal or an address and a wobble position on the disc from the detected address, and recording control is performed on a target recording track section.