CN1290089C - Disk recording device and disk recording methoed - Google Patents

Abstract

The present invention provides a disk recording device and a disk recording method, aiming at determining the recording address and recording position of an optical disk with a wobble phase modulation format by using a wobble reproduction signal and a track reproduction signal. The address information and synchronization information on the disk are detected for the wobble reproduction signal and the track reproduction signal from the optical disk respectively, and the address information necessary for specifying the recording track on the disk and the synchronization timing necessary for specifying the connection position are selected according to the respective detection states.

Description

Disc recording device and disc recording method

technology area

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 necessary during post-writing and rewriting of information on an optical disc recording medium.

Background technique

DVD (Digital Versatile Disc) can be cited as a large-capacity disc recording medium. As a recording medium that can record information, DVD-R, DVD+R, rewritable type, and DVD-RW, DVD+R have been developed in recent years. RW. On these discs, the corrugation (wobble: wobble) or the engraved concave area (convex area: land pre-pit) on the side of the recording track on the disc is used to determine the recording position (track) on the disc. Modulation recording has a composition Synchronization signal, address information, data of additional information.

Regarding the modulation method for the above-mentioned synchronization signal, address signal, and additional signal, for example, as shown in JP-A-2001-110061, the LPP (Plant-Pump) format and the PM (Waving Phase Modulation) format can be cited. The LPP format is replaced by DVD-R, The DVD-RW disc is adopted, and the PM format is adopted by DVD+R and DVD+RW.

Here, the PM format will be described with reference to FIG. 2 . Fig. 2 shows an example of the PM format. (a) shows a wobble phase modulation (wobble phase modulation) method, and (b) shows an ADIP (address in pre-groove) word structure, which is a constituent unit of information for performing wobble phase modulation, as a DVD The relationship between the period of 1 ECC block in the data recording unit and the number of ADIP words contained therein, and the frame configuration in 1 sector as the constituent unit of the ECC block, (c) shows the repetition of the ECC block unit for the recording track. Write, postscript (link) method.

In (a), the wobble phase modulation part is a part in which the phase is reversed by 180 degrees, and the occurrence interval of the phase modulation part in 93 wobble units is divided into ADIP synchronization (4 wobble intervals) corresponding to the beginning of the ADIP word, and each data bit According to the bit synchronization (1 wobble interval) and the data bit (2 wobble intervals) corresponding to the starting point of the starting point, 0 data and 1 data are distinguished by using the difference in the occurrence interval of the data bit.

In (b), the ADIP word is composed of 52 bits, the ADIP address that determines the track position on the disk is formed by data 0 (=0 fixed) corresponding to the ADIP synchronization of the starting point and 3 bytes of data 1 to 23, and AUX (auxiliary) data consisting of 1 byte of data 24 to 31, and error correction codes consisting of 2.5 bytes of data 32 to 51 to correct errors included in the restored 1ADIP word. On the other hand, the ECC block period, which is the recording unit on the disc, is configured to include four ADIP words, and the access reliability to the target ECC block is ensured. The configuration of the ECC information block will be described. An ECC block is composed of 16 sectors as an access unit at the time of reproduction, and a synchronization unit at the time of reproduction corresponding to the data amount of one sector is composed of 26 frames composed of synchronous signals and modulated data. 1 frame is formed by the amount of data of 1488T (T is the channel signal bit as the basic unit of the recording mark length on the disc, T=26.16MHz), and the frame synchronization signal SY0 representing the start of the sector is included in the start frame of 1 sector , the ID of the data part used for specifying the track position at the time of disc reproduction immediately thereafter.

In (c), the connection method is to add 8T-size dummy data before the ECC block containing recording information, and start recording dummy data from the connection position (the 17th wobble position) of the terminal 8T of the previous ECC block, before recording Recording is stopped at the connection position (the 17th wobble position) of the end 8T of the ECC block, and then overwriting and post-recording are performed in units of ECC blocks. The connection position is determined by phase-modulated ADIP synchronization in wobble, detection of data bits other than detection, and detection of ADIP address information.

Summary of Inventions

There are various write-once and rewritable disks including DVD+R and DVD+RW. However, during rewriting and writing on these disks, address information modulated to determine the track position on the disk is detected. At the same time, an operation of specifying the reproduction swing position, ie, specifying the connection position, is performed by detecting the modulated synchronizing signal or the like.

Therefore, defects such as dust or damage adhering to the disk hinder the detection of the modulated synchronous signal, etc., and cause a decrease in the address detection rate, and also affect the determination of the correct connection position. At worst, it is recorded off the connection position.

In such a case, the disc recorded on may record a track at a position different from the track position of the recording target, which may lead to destruction of recorded data. In addition, after recording with an error in the connection position, a part of the ECC block data near the connection may be destroyed during playback, and a section error may occur, making playback impossible.

Therefore, the disk recording apparatus has the following problems: even for a defective disk, track position identification and high-precision connection position identification by address detection are pursued, and at the same time, information is rewritten and additionally written.

Contents of the invention

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a disk recording method and a disk recording apparatus that solve the above-mentioned tasks.

In the present invention, the disk recording apparatus that solves the above-mentioned problems has at least:

Modulation is a detection unit for reproducing a wobble signal, detecting a first synchronous signal indicating the start point of a first data constituent unit and first address information included in the data structure,

A detection unit that modulates a track signal for reproduction, detects a second synchronous signal indicating the start of a second data constituent unit, and a second address information included in the data structure,

a first selection unit for selecting the detection timing of the first synchronization signal and the detection timing of the second synchronization signal or the second address information,

a second selection unit for selecting the first and second detection addresses, and

A control unit that synchronizes with the wobble position on the disk, determines the connection position, and performs recording control on the target recording track section based on the detection timing selected by the first selection unit and the detection address selected by the second selection unit.

Description of drawings

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

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

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

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

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

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

Fig. 7 is a diagram showing a second embodiment of the disc recording device.

Detailed ways

Below, illustrate the present invention with accompanying drawing

FIG. 1 is a diagram showing a first embodiment of the data transfer method and disc recording apparatus of the present invention. In the figure, 1 is an optical disc with a wobble phase modulation format; 2 is an optical head corresponding to disc recording; 3 is a laser driver that generates recording pulses according to the modulated recording data and controls the semiconductor laser contained in the optical head; 4 is from the optical head. The photodetector generates a difference signal, reproduces the wobble signal corresponding to the track on the disc, and simultaneously reproduces the AFE (analog front end and rear end) of the recording mark recorded on the track of the optical disc 1; 5 is the period for detecting the wobble phase modulation part and generating the phase inversion The detection circuit of the phase modulation unit as a binarized pulse of 0 and 1; 6 is the pulse width measurement, ADIP synchronization detection of 4 wobble widths, bit synchronization of 1 wobble width, and data bits of 2 wobble widths, and ADIP synchronization is performed simultaneously The ADIP synchronous detection circuit of periodic protection; 7 is after determining the starting point of the ADIP word through the ADIP synchronous detection, judging 0 data and 1 data according to the oscillating position of the data bit, the word is formed and restored, and the ADIP is processed after error correction ADIP address detection circuit for address detection and protection; 8 is a frame synchronization detection circuit for detecting frame synchronization signals other than SY0 included in the track reproduction signal, and simultaneously performing demodulation processing of frame data; 9 is a frame according to the starting point of the sector The detection of the synchronous signal SY0 and the demodulation data immediately thereafter carry out the detection of the data part ID address, the data part ID detection circuit of protection; 10 is to utilize the ADIP address that the ADIP address detection circuit 7 of 7 obtains and convert the low-order 2 bits The address of the removed ECC information block unit and the address selection of the ECC information block unit after the low-level 4 bits of the data portion ID detection circuit 9 are removed select the address selector; 11 is to detect in the ADIP synchronous detection circuit 6 The ADIP synchronous timing of protection and the timing selector that selects at the data section ID detection timing of data section ID detection circuit 9; 12 is the synchronization that controls the output of the synchronization timing from the timing selector 11 to be turned on and off. 13 is a recording control circuit, utilizes the obtained ECC address and the ECC address of the recording target to start and end the track detection of the recording target, and simultaneously performs synchronization with the swing position of the recording track according to the synchronization timing, and connects Determine the position, and then generate the recording control signal for the target recording interval on the disk; 14 is the generation of recording data for the ECC information block unit recorded on the disk, which is suitable for recording on the disk for modulation processing, framing, addition of frame synchronization signals, etc. The recording data, according to the recording control signal to generate data output modulation circuit.

An example of an address detection operation, timing synchronization for specifying a connection position, and recording control operation performed in the recording apparatus of FIG. 1 will be described with reference to FIGS. 3 , 4 , and 5 .

Fig. 3 shows the first recording method using the ECC address obtained from the ADIP address and the ADIP synchronization detection synchronization in the disk recording device of Fig. 1, which is applicable to the recording of unrecorded disks, the additional writing and rewriting of recorded disks .

In FIG. 3 , the PSN shown in the recording track indicates an area of 1ECC block unit, and the data part IDs corresponding to 16 sectors contained therein correspond to 030000-F, 030010-F, . . . , respectively. The ADIP address determination timing in the ADIP address detection circuit 7 is delayed by 4 sectors from the ECC recording area determination. The address selector 10 outputs the ECC address generated according to the ADIP address detection value, and the recording control circuit 13 performs comparison with the recording start and end target ECC information block addresses, and performs recording interval detection. FIG. 3 shows the detection operation for the recording interval of the recording start ECC address 03001 and the recording end ECC address 03002.

On the other hand, the detection of the ADIP synchronization by the ADIP synchronization detection circuit is performed 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 outputs the cycle-protected ADIP synchronization detection timing. In addition, after the synchronization control circuit 12 tracks and opens the optical disc 1, the synchronization timing is output until reaching the recording start ECC information block. Synchronization of the upper swing position. In addition, the recording interval detection is performed, and when the timing count value reaches the connection position in FIG.

Fig. 4 shows the 2nd recording method utilizing the ECC address obtained according to the ID address of the data section, ADIP synchronous detection and synchronization on the disk recording device of Fig. 1, this recording method is suitable for rewriting the recorded area, from the recorded position Beginning postscript.

Carry out the detection of data part ID address value by data part ID detection circuit 9 in Fig. 4, the output of address selector 10 is to select the ECC address that produces according to the detection value of data part ID address in this case, in recording control circuit 13 The detection of the recording period is performed based on the selected ECC address and the ECC addresses of the recording start and end destinations. The detection of the data part ID can be performed only in the playback section of the recorded track, and the acquisition of the ECC address and the synchronization of the recording timing count must be performed in this section.

On the other hand, the recording timing synchronization is similar to the first recording method. The recording timing count is synchronized based on the ADIP synchronization timing to achieve synchronization with the wobble position on the disc. Recording control on the optical disc 1 is performed by the following control similar to that of the first recording method.

In the case of the first and second recording methods, there may be concerns about the accumulation of wobble position misalignment during recording, and output control depending on the synchronization timing of the synchronization control circuit may not be performed. It is also conceivable to perform synchronization based on the ADIP synchronization detection timing counted for the recording timing in the recording to the disc.

Synchronization of recording timing and counting is not limited to ADIP synchronization alone, and bit synchronization of wobble phase modulation and data bit detection timing can also be considered as synchronizing timing.

5 shows the disk recording device in FIG. 1, using the ECC address obtained from the data part ID address, and the third recording method for synchronizing the data part ID detection timing. Similar to the second recording method, it is applied to the recorded area. Write, postscript from the recorded position.

The detection of the recording interval in FIG. 5 is the same as the second recording method, and the detection of the ID address of the data part is also performed similarly. On the other hand, the ID detection timing obtained from the data portion ID detection circuit 9 detects, for example, 16 sectors in the ECC recording area. The output of the timing selector 11 selects the detection end timing of the data part ID in this case, the recording timing count is synchronized based on this timing, and the recording control on the optical disc 1 is performed by the following control similar to the first recording method.

The detection of the data part ID can only be performed in the recorded track reproduction section, and the acquisition of the ECC address, the detection of the synchronization timing, and the synchronization of the recording timing count must be performed in this section.

In the third recording method, it is also conceivable to synchronize the recording timing count using the frame synchronization signal SY0 indicating the start of the sector or other frame synchronization signals including SY0.

The synchronization of the recording timing count is not limited to the ID detection timing obtained by the data part ID detection circuit 9 or the detection of the frame synchronization signal headed by SY0 as a reference. The binarized reproduced wobble signal and its detection timing are synchronized to count the recording timing in units of wobbles. In this case, the accuracy of synchronization between the wobble position on the disk and the recording timing count increases, and as a result, the connection position can be specified with higher accuracy.

An example of a selection method for the first, second, and third recording methods performed by the recording apparatus of FIG. 1 will be described with reference to the flowchart of FIG. 6 .

In FIG. 6, after the tracking of the optical disc 1 is turned on, wobble reproduction and track reproduction are performed (step 601). In step 601, under the situation of the stable (locked) detection of the ADIP synchronization of ADIP synchronous detection circuit 6, according to the address detection state (step 603) of ADIP address detection circuit, if address detection has been carried out, then control address selector 10, The selection signal of the timing selector 11 selects the first recording method (step 606). When the ADIP address has not been detected in step 603, or even if the ADIP address has not been detected by opening and retrying by tracking again, according to the address detection state (step 604) of the data part ID detection circuit 9, if the address detection has been carried out , the selection signals of the address selector 10 and the timing selector 11 are controlled to select the second recording method (step 606). In step 602, when the ADIP synchronous detection is unstable or not detected at all, in step 605, address detection is performed according to the detection state of the data part ID address value, the detection timing of the data part ID or the detection state of the frame synchronization signal 1. At the time of timing detection, in step 606, the third recording method is selected, and the selection process of the recording method ends. If it is judged in steps 604 and 605 that address detection and timing detection are not carried out, retry or be processed as an unrecordable area (defective area) after tracking is enabled again, and the other recording areas on the optical disc 1 are processed from step 601 to 606 is processed and recorded.

As described above, according to the ECC address used in the recording control circuit 13 and the detection status of the synchronization timing, the priority is given to the selection of the first, second, and third recording methods, but this is not particularly limited. In order, it may also be considered that the disk recording device selects the pre-recording method before tracking is enabled.

7 shows a second embodiment, showing an example of a disk recording apparatus in the following case: for the reproduction wobble signal from the optical disk 1 of the wobble phase modulation method of the disk recording apparatus of FIG. 1 , ADIP address information and ADIP synchronization timing are detected. , and converted to an LPP signal based on the land and pit area (LPP) format for recording control. Such a configuration is to configure a recordable disc recorder for a disc of the wobble phase modulation format by adding various circuits preceding the LPP signal generating circuit to a recording device compatible with an LPP format optical disc.

In Fig. 7, 15 is the LPP signal generating circuit, according to the output ECC address of the address selector 10, constitutes the LPP transmission data based on the LPP format, according to the synchronization timing from the timing selector 11, performs the synchronization of the pulse-shaped LPP signal , output; 16 is the LPP selector, when the optical disc 1 is the optical disc of LPP format, the selection between the LPP reproduction signal and the LPP signal generated by the LPP signal generation circuit 15 is carried out; 17 is the LPP detection circuit, to the LPP selector 16 The output LPP signal is used to detect the LPP synchronous signal, the modulated address information, etc.; the description of symbols overlapping with those in FIG. 1 is omitted.

In FIG. 7 , when the optical disc 1 is an LPP format disc, the LPP detection circuit detects the LPP synchronization signal and address information modulated into the LPP reproduction signal from the optical disc 1 . The recording control circuit 13 performs synchronization between the LPP position on the disk and the recording timing count based on these detection timing and address information, detects the recording interval of the track of the recording target, and corresponds to the connection position based on the LPP format optical disk A recording control signal is generated.

In FIG. 7, when the optical disc 1 is a disc of the wobble phase modulation format, the LPP generation circuit 15 modulates the ECC address including the ECC address based on the LPP format based on the synchronization timing and the ECC address detected from the wobble reproduction signal or the track reproduction signal from the optical disc 1. The data, the synchronization timing and LPP signal synchronization and output. For the selection of synchronization timing and the selection method of ECC address, the method described in the first embodiment is used. The generated LPP signal is similarly processed by the LPP detection circuit 17 and the recording control circuit 13 described above, and recording on the optical disc 1 is performed.

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

Claims (6)

1. the disc recording apparatus that the CD of swaying phase modulation format is write down is characterized by, and possesses:

The detecting unit of the 1st address information that is modulated to the 1st synchronizing signal of the starting point of reproducing swinging signal, detection expression the 1st data component unit and in data structure, comprises,

The detecting unit of the 2nd address information that is modulated to the 2nd synchronizing signal of the starting point of reproducing trajectory signal, detection expression the 2nd data component unit and in data structure, comprises,

To the detection of described the 1st synchronizing signal regularly and the 2nd synchronizing signal or the 2nd address information detect the 1st selected cell that timing is selected,

To the described the 1st, the 2nd detect the 2nd selected cell selected the address and

According to the detection of selecting from the 1st selected cell regularly with from the detection address that the 2nd selected cell is selected, the swing position that obtains and coil synchronously and determine link position and to carrying out the control module of record controls between the target record track region.

2. disc recording method that the CD of swaying phase modulation format is write down is characterized by:

Be modulated to and reproduce swinging signal, the 1st synchronizing signal that detects the starting point of representing the 1st data component unit and the 1st address information that in data structure, comprises,

Be modulated to and reproduce trajectory signal, the 2nd synchronizing signal that detects the starting point of representing the 2nd data component unit and the 2nd address information that in data structure, comprises,

To the detection of described the 1st synchronizing signal regularly and the 2nd synchronizing signal or the 2nd address information detect timing and selected,

Select the described the 1st, the 2nd to detect the address,

According to the detection timing of described selection and the detection address of selecting, obtain and coil also definite synchronously link position of swing position, to carrying out record between the target record track region.

3. disc recording method according to claim 2 is characterized by,

The detection of described selection regularly and the detection address of selecting constitute by any of following three kinds of combinations:

By the 1st synchronizing signal and the 1st address information form the 1st the combination,

By the 1st synchronizing signal and the 2nd address information form the 2nd the combination,

By the 3rd combination that the 2nd synchronizing signal or the 2nd address information detect regularly and the 2nd address information is formed,

According to the selection of described the 1st, the 2nd, the 3rd combination, the swing position that obtains and coil synchronously, determine link position, to carrying out record controls between the track region of target record.

4. disc recording method according to claim 3 is characterized by,

Being chosen as of described the 1st, the 2nd, the 3rd combination:

When carrying out the 1st synchronization signal detection and carry out the detection of the 1st address information, select the 1st combination,

When carrying out the 1st synchronization signal detection and only carry out the detection of the 2nd address information, select the 2nd combination,

When not carrying out the 1st synchronization signal detection and carry out the detection of the 2nd address information, select the 3rd combination.

5. the disc recording method of the CD of a corresponding swaying phase modulation format is characterized by,

Be modulated to the reproduction swinging signal, represent the detection of synchronizing signal of the starting point of the 1st data component unit,

Be modulated to the reproduction trajectory signal, carry out the detection of the address that comprises in the 2nd data structure unit,

According to the detection of described synchronizing signal regularly and described detection address, the swing position that obtains and coil synchronous determined link position, to carrying out record controls between the target record track region.

6. the disc recording method to the CD of swaying phase modulation format is characterized by,

Be modulated to the reproduction trajectory signal, represent the detection of the address that comprises in the detection of synchronizing signal of starting point of data component unit and the data structure,

According to the detection timing and the described detection address of described synchronizing signal or address, obtain and coil the synchronous of swing position, determine link position, to carrying out record controls between the target record track region.

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