JP2003100015A - Data transferring method and optical disk recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the recording control with respect to an optical disk having a wobble phase modulation format and the rotational control of the optical disk to be performed by an optical disk recording device corresponding to an LPP (land pre-pit) format. SOLUTION: In this data transferring method, when address information and additional information whose phases are modulated on the optical disk are detected and a plurality of a series of address information which are detected at the time of performing the data transfer of data including these detected information are converted into address information with respect to data blocks being recording units on the optical disk and the data of information including these converted results are transferred to reproduced wobble signals from the optical disk having the wobble phase modulation format, the transferring of the data is performed in a period when wobbles corresponding to a next data block are reproduced and the data are transferred by being made to be synchronized with the detection timing of a synchronizing signal whose phase is modulated and which is included in the period.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transfer method and an optical disk recording apparatus, and more particularly to a data transfer method and an optical disk recording apparatus required when information is additionally written or rewritten on an optical disk recording medium.

[0002]

2. Description of the Related Art DVD as a large-capacity optical disk recording medium
(Digital Versatile Disc), which is a write-once DVD-R and rewritable DVD-R as a recording medium capable of recording information.
W, DVD + RW and DVD-RAM have been developed in recent years. Address information, additional information, and a synchronization signal are recorded on these optical discs for the purpose of specifying the recording position (track) on the optical disc even in the unrecorded state.

Regarding the method of modulating the address information and the additional information, for example, a land pre-pit (hereinafter referred to as LPP) format and a wobble phase modulation (Wobble Phase Modulation) are disclosed in Japanese Patent Laid-Open No. 2001-110061.
Hereinafter, referred to as PM) format, LPP format is adopted in DVD-R, DVD-RW, PM format is adopted in DVD + RW. Here, the PM format and the LPP format will be described with reference to FIGS.

FIG. 2 shows an example of the PM format. FIG. 2A shows a wobble phase modulation method, a synchronization signal,
The positional relationship between the modulation data and the data frame recorded as a row of recording marks on the recording track and the wobble is shown.
FIG. 2B shows an ADIP (address in pre-groove) word, which is composed of modulated data and is a constituent unit of information data which is modulated into wobble by wobble phase modulation, and further includes an ADIP word and a data recording unit of DVD. The relationship of the number of ADIP words included in a certain ECC block is shown. FIG. 2C shows a method of rewriting in the ECC block unit, a method of additional writing, and a positional relationship between the beginning and end of the ECC block and the wobble.

In FIG. 2A, the wobble phase modulation part is a part where a phase difference between wobbles occurs, and at the appearance interval of the phase modulation part, a word sync which is the head of an ADIP word and a bit sync which is the head of each data bit. Are distinguished, and 0 data and 1 data are identified as data bits by the difference in the appearance interval from the bit sync to the next phase modulator. The appearance cycle of the word sync or the bit sync is 93 wobbles in terms of the number of wobbles, and 32 w per wobble (T is a channel bit which is a basic unit of the recording mark length on the optical disk, T = 26.16 MHz). The relationship between the 93 wobbles and the data frame is
There are 2 frames (1488T x 2) for 93 wobbles,
There is a positional relationship in which the 17th wobble position (that is, the start point of Wobble 16) from the wobble with respect to the word / bit sync head and the synchronization signal (start point of the frame sync) at the head of the data frame correspond.

In FIG. 2B, the ADIP word is 6.
52 bits of data are subjected to wobble phase modulation in a wobble signal which is composed of 5 bytes and is included in 104 frames (4 sectors in one sector 26 frames). The internal structure of the ADIP word is as follows: data bit 0 (fixed to 0) corresponding to the first word sync, ADIP address (data 0 and 3 bytes of data 1 to 23), AUX (auxiliary) data (data 24 to 31 of 1). Byte), ADIP address, AUX
Error correction code (data
32 to 51, 2.5 bytes). Since one ADIP word has 108 frames (4 sectors), one ECC block (16 sectors) which is a recording unit on the optical disc contains four ADIP words and address information.
The reliability of access to the recording target position is ensured.

In FIG. 2 (c), E for recording purpose is used for the purpose of rewriting or additional writing in ECC block units.
Add dummy data for 8T before CC block
Recording of dummy data is started from the end 8T of the CC block, and connection recording of ECC blocks is performed. At the end of recording, the data for the ECC block end 8T is not recorded on the optical disc. The connection area between the ECC blocks corresponds to 8T at the end of the ECC block,
EC due to redundant area generation and recording position shift during playback
The error propagation in the C block is minimized. The positional relationship between the recording start area of the dummy data, the ECC block end area, and the wobble is defined so as to be within the 16th wobble before the beginning of the data frame.

FIG. 3 shows an example of the LPP format. FIG. 3A shows the positional relationship between the wobble and the LPP, the arrangement of the LPP on the land track where the LPP is engraved, and the data frame on the groove track which is a recording track. Position relationship, LP
The structure of LPP data which is one of the data units modulated as P is shown. FIG. 3B shows an example of the modulation rule of the sync signal pattern and data pattern modulated as LPP. FIG. 3C shows a data structure including a plurality of LPP data and address information and the like.

In FIG. 3A, the LPP is carved as a groove on a land track adjacent to a groove track for generating a recording mark, and one WPP (186T) has one LPP.
The sync signal and the data are modulated according to the positions of the pre-pits existing in three consecutive wobbles.
Further, the wobble position where the LPP is carved corresponds to the sync signal at the head of the data frame recorded on the groove track. In the LPP data, 13 bits including the LPP synchronizing signal are modulated per 26 frames per sector, and the LPP data is doubly modulated in the even-numbered frame and the odd-numbered frame. The LPP data includes 8 data bits, which are components of address information and the like. FIG. 3B shows a method of modulating a sync signal, 0 data, and 1 data by LPP. FIG. 3C shows the configuration of address information and the like by LPP. In the case of the LPP format, an ECC address is 3 bytes within a total of 16 bytes of 8 data bits included in 16 LPP data corresponding to 1 ECC block length, and a parity A is a 3-byte correction code for the ECC address.
Field I for identifying the data content of the following 6 bytes
D1 byte, ECC address 3 bytes with the same value as the previous ECC address depending on the value included in the field ID, A
It is composed of a total of 6 bytes such as UX data and a parity B which is a 3-byte correction code for it.

When recording on an optical disk, the optical disk recording apparatus detects address information and AUX data.
Further, seek is performed from the address information to the information recording start position to perform recording control on the optical disc. At the same time, the current optical disk rotation speed is measured from the sync signal detection timing, the target rotation speed is pulled in, and CLV (constant linear
velocity: constant linear velocity) control is performed. Therefore, the generation of the recording mark on the recording track on the optical disc and the synchronization with the wobble are achieved, and it becomes possible to rewrite the recording information and additionally record. However, as described above, since the recording format of the address information is different between the LPP format optical disc and the PM format optical disc, in order to perform recording on the LPP format optical disc, a recording device compatible with the LPP format is required, In order to record on a PM format optical disc, a PM format compatible recording device was required.

[0011]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention Recent optical disk recording apparatuses are multi-optical disk compatible drives for recording and reproducing various types of write-once and rewritable optical disks such as DVD, CD-R and CD-RW. Realization is an important factor in determining its added value. The dedicated circuit that configures the inside of the recording device and is responsible for signal processing for each optical disc incorporates a logic circuit for performing signal processing according to the format of the optical disc. Therefore, it cannot be applied to the signal processing for the optical disk which is not assumed at the time of circuit design. As a method of improving this, a method of providing a plurality of dedicated circuits corresponding to each format or a method of adopting a dedicated circuit corresponding to a plurality of formats can be considered. However, the former is disadvantageous in terms of cost because the circuit scale becomes large, and the latter requires the redevelopment of the logic circuit, which makes it difficult to develop a multi-optical disc drive at an early stage and is extremely disadvantageous in terms of cost. Becomes

Therefore, a conversion device for developing a signal corresponding to the signal processing in the existing logic circuit while newly performing signal processing for the corresponding optical disk has been developed, and recording control for the optical disk and CLV rotation control are possible. Can be considered. Therefore, recording control, CL
A signal conversion method and transfer method that enable V rotation control are necessary, and that is a problem. Therefore, the object of the present invention is to
It is an object of the present invention to provide a data transfer method and an optical disk recording device that solve the above problems.

[0013]

[Means for Solving the Problems] The above problem is to detect address information and additional information on a phase-modulated optical disc for a reproduction wobble signal from a PM format optical disc, and transfer data including the detected information. When a series of address information detected at the time of conversion is converted into address information for a data block which is a recording unit on the optical disc, and information including the conversion result is data-transferred,
The problem can be solved by performing the transfer in the period in which the wobble corresponding to the next data block is reproduced and performing the transfer in synchronization with the detection timing of the phase-modulated synchronization signal included in the period.

Further, an optical disk recording apparatus for performing recording control in units of data blocks while performing rotation control detects a first sync signal, address information on the optical disk and additional data from a wobble phase modulation section of a PM format optical disk. And a means for determining a data block address from a plurality of sets of address information, a data in accordance with the LPP format and a second synchronization signal for transfer data including the block address, and a first data block in the next data block period. , A second transfer signal obtained by land pre-pit reproduction on the optical disc, and a selecting means for selectively outputting the first transfer signal, a block address included in the selected transfer signal, 2 means for detecting the sync signal, and the target track position is specified from the detected block address. Generation of the modulation signal, and means for controlling the output, from the occurrence period of the second synchronizing signal, can be solved by providing a controller for controlling the optical disc rotation speed.

[0015]

1 is a diagram showing a first embodiment of a data transfer method and an optical disk recording apparatus of the present invention. In the figure, 1 is a PM format optical disc, 2
Is an optical head capable of recording on an optical disk, 3 is a laser driver for controlling a semiconductor laser included in the optical head,
Reference numeral 4 is a spindle motor for driving the optical disc 1, 5 is a motor driver for controlling the rotation drive of the spindle motor 4, and 6 is a signal detected from a photodetector of the optical head, and a wobble signal for a track on the optical disc 1 is reproduced. If the optical disc is in LPP format, AFE (Analog that detects LPP and plays back as LPP signal)
Front End), 7 is an LPP conversion circuit that performs signal processing on an optical disc of PM format, and generates and outputs an LPP signal for ADIP word detection information obtained by signal processing, 8 is address information obtained by signal processing for an LPP signal The optical disc control circuit performs recording control and modulation signal generation for the tracks on the optical disc 1 and measures the optical disc rotation speed from the detection timing of the sync signal modulated to the LPP signal to control the rotation. Reference numeral 9 denotes the entire recording device. A microcomputer 1 for controlling the optical disc 1 and a selector 1 for selecting the detected LPP signal from the AFE 6 or the generated LPP signal according to the discrimination of the optical disc 1 by the microcomputer 9.
It is 6.

The LPP conversion circuit 7 includes the components described below. Phase modulator detection circuit that detects the wobble phase modulation part, detects each sync signal of word sync and bit sync from the detection result of the phase modulation part, measures the appearance period of each detected sync signal, and detects it incorrectly by the protection window A sync detection protection circuit 10 for avoiding the above, a data bit determination circuit 11 for determining 0 data and 1 data by detecting the next phase modulation part from the bit sync detection, a data bit is latched, and an ADIP word is constructed from the detection order. Then, the data latch correction circuit 12 that performs error correction processing, the address protection circuit 13 that verifies the continuity to the ADIP address from the corrected ADIP word, and determines the address to the ECC block,
ECC determined by the frame timing generation circuit 14 and the address protection circuit 13 that generate the LPP transfer timing from the detection timings of the word sync and the bit sync respectively.
It is latched in the address and data latch correction circuit 12.
It is composed of an LPP signal generation circuit 15 that generates LPP transfer data from AUX data and generates an LPP signal that is synchronized with the LPP transfer timing.

The optical disk control circuit 8 includes the components described below. A modulation circuit 17 for generating a recording signal by performing 8/16 modulation processing and addition of a synchronization signal on ECC data which is recording data on the optical disc 1,
A recording control circuit 18 for controlling the start and end of generation of a modulation signal for the modulation circuit 17 by the coincidence between the ECC address detected from the LPP signal and the recording start ECC address set by the microcomputer 9, and the recording stop control by the microcomputer 9. The rotation control for the motor driver 5 from the rotation control timing generated by the detection of the sync signal modulated to the LPP signal, the ECC address, the LPP detection circuit 19 for detecting the AUX data, and the detection of the sync signal modulated by the LPP signal. It is composed of a rotation control circuit 20 that generates a signal.

FIG. 4 shows the optical disk recording apparatus of FIG.
An example of a conversion method into LPP transfer data for detection of an ADIP word and a recording control method of an ECC block for the optical disc 1 is shown, and an outline of the recording operation in the optical disc recording device will be described. In Figure 4, the ADIP word is
As shown in 2 (b), each word consists of an ADIP address of 3 bytes and 1 byte of AUX data. In FIG. 4, a series of ADIP words W detected by the LPP conversion circuit 7
ADIP address value 00c00 for (N) to W (N + f)
0 to 00c00f (hexadecimal number display), AUX data a (N)
~ A (N + f) are shown. In the optical disc control circuit 8, the recording unit on the optical disc 1 is performed in ECC block units, and therefore, 4 units per ECC block.
Determine one ECC address from two consecutive ADIP addresses.

The correspondence between the ADIP address and the ECC head address is a value obtained by right-shifting the ADIP address value by 2 bits (dividing by 4), and the ECC addresses are also continuous values. Further, the determined ECC address takes, for example, a value of +1 for the ECC block corresponding to the track position where the ADIP address is detected and is transferred as an LPP signal in the track section for the next ECC block. Include in LPP signal and transfer. The above processing is performed in the address protection circuit 13. As for AUX data, 4 bytes per 1 ECC block is included. Therefore, for the ECC block that detected 4 bytes of AUX data,
It is included in the LPP signal for the next ECC block and transferred. The determined ECC address and 4 bytes of AUX data are shown in Fig. 3.
Convert to LPP pulse train according to the format of LPP format,
Transferred. The described ECC address generation works with multiple ADI
Not only the address value obtained by adding +1 to the value determined from the P address may be adopted, but also the value obtained by adding −1 or the value obtained without correction by +1 or −1 may be used as it is.

Next, the recording control of the ECC block data on the recording track on the optical disc from the detection of the information contained in the transferred LPP signal, which is performed in the optical disc control circuit 8, will be described. In FIG. 4, the LPP decoding is performed by the LPP detection circuit 19 and shows the detection result of the information contained in the transferred LPP signal. After detecting the last LPP signal in the ECC block section, the ECC address value, AU
4 bytes of X data are detected. The recording control circuit 18 detects a match between the detected ECC address value and the recording start ECC address set by the microcomputer 9, and when they match, generates a recording control signal to the modulation circuit 17. The recording control signal is from the last 8T of the dummy ECC data to the ECC data 0
To control the modulation process and the generation of the recording signal, and to terminate the generation of the recording signal at the end 8T of the ECC data 1 for ending the recording. The modulation circuit generates a recording signal while performing a modulation process on the input ECC data according to the recording control signal. The recording signal is modulated into recording pulses and formed as recording marks on the recording track on the optical disc 1 while synchronizing the data frame from the beginning of the dummy data with the wobble position.

FIG. 5 is performed in the optical disk recording apparatus of FIG. 1 and is for controlling the rotation of the optical disk 1.
The transfer timing of the LPP signal is shown. In FIG. 5, the phase modulation portion is detected from the reproduction wobble signal, and the word sync and the bit sync are detected by the synchronization detection protection circuit 10 from the detection cycle. The wobble counter included in the frame timing generation circuit 14 measures the appearance period of the word sync or the bit sync 93
It is a frequency division counter and synchronizes the counters according to the detection timings of the word sync and the bit sync. Regarding the synchronization method, the detection timing of the word sync is 5 wobbles after the head phase modulation portion, and the wobble counter is loaded with "5". The bit sync detection timing is one wobble after the leading phase modulation portion, and the wobble counter is loaded with "1". Next, the LPP transfer timing is generated from the decoding of the wobble counter value synchronized by the word sync and the bit sync.

In the PM format of FIG. 2, the head of the data frame is synchronized with the 17th wobble position, and the LPP transfer timing is generated in synchronization with the wobble position. The LPP signal generation circuit 15 generates LPP transfer data including the determined ECC address and 4 bytes of AUX data as an LPP signal in synchronization with the LPP transfer timing. The LPP transfer timing occurs once every two frames because the word sync and the bit sync occur once every two frames. In the example of FIG. 5, LP for word sync detection
The P transfer timing is synchronized at the time of even-numbered series LPP synchronization signal transfer, and the LPP transfer timing for bit sync detection is synchronized at the time of even-numbered series LPP data transfer.

Therefore, the LPP transfer timing and the generated LPP
The signal reflects the fluctuation of the detection timing of the word sync and the bit sync, and the fluctuation of the optical disc rotation speed can be reflected in the transfer timing of the LPP signal to be generated.

Even when the word sync and the bit sync are not detected, since the wobble counter is a frequency division counter, the LPP transfer timing is generated by the timing prediction value that has been counter synchronized in the previous detection, and the LPP signal is synchronized. Transfer is performed.

FIG. 6 shows an ADIP word detection process for the wobble phase modulation in the LPP conversion circuit 7, an LPP data generation process, and an LP performed by the optical disc controller circuit 8.
It shows P detection processing and generation of control timing. In FIG. 6, since the LPP transfer data is generated once for each ECC block, the detection processing 4 for the ADIP word is performed.
Each time, the LPP data generation process is performed once. The LPP data generation process is started at the position A in one ECC block based on the ADIP address detection value and its value after continuity protection.
After identifying the DIP word and the final ADIP word of the ECC, the ECC address and 4 bytes of AUX data are determined, LPP data is configured, and the LPP signal is transferred.

In the optical disc controller circuit 8, the ECC address and AU included in the transferred LPP signal are calculated.
The X data is detected and the rotation control timing is generated. In FIG. 6, as an example of the rotation control timing, a timing synchronized in units of one sector (26 frames) is shown. In this example, timing synchronization is performed by detecting an even-numbered LPP synchronization signal located at the beginning of one sector. Regarding the rotation control timing, the rotation control circuit 20 generates a control signal by phase comparison between the pulse appearance period and the reference timing, and the optical disk rotation control is performed at a target rotation speed.

Even if the LPP synchronization signal is not detected, the timing signal is inserted from the predicted position from the previous detection, the timing signal is prevented from being lost, and stable rotation control is performed.

FIG. 7 is a diagram showing a second embodiment of the data transfer method and the optical disk recording apparatus of the present invention. In the figure, reference numeral 6 indicates a signal detected from the photodetector of the optical head. When the optical disc 1 is in the LPP format, LPP is detected and reproduced as an LPP signal.
In the case of PM format, AFE (Analog Front) that reproduces PM signal from wobble detection for tracks on the disc
End), 24 is a PM conversion circuit that performs signal processing on an optical disc of LPP format and generates and outputs a PM signal for the obtained LPP data. 8 is a track on the optical disc 1 from address information obtained by signal processing for the PM signal. Recording control and modulation signal generation for PM
An optical disc control circuit that measures the optical disc rotation speed from the detection timing of the synchronization signal modulated into the signal and controls the rotation, 16 is the optical disc 1 by the microcomputer 9.
The selectors 16 and 22 that select the detected PM signal from the AFE 6 or the generated PM signal according to the determination of are PM detection circuits that detect the sync signal for the transferred PM signal, the ADIP address, and the AUX data. The other parts are denoted by the same reference numerals as those in FIG. 1 and their description is omitted.

The PM conversion circuit 24 includes the components described below. Sync signal LPP modulated to playback LPP signal
Sync detection protection circuit 10 that detects sync (even and odd frames), measures the appearance period of each detected sync signal, and avoids false detection by the protection window. Judgment of data 0 and data 1 for LPP signal after LPP sync. A data bit determination circuit 11 that performs a data latch, a data bit is latched, LPP data is configured from the latch order, a data latch correction circuit 12 that performs error correction processing, and the continuity of ECC address values obtained from the corrected LPP data is verified. Address protection circuit 13 that determines the ADIP address, frame timing generation circuit 1 that generates PM transfer timing from the detection timing of the LPP sync.
4. A PM signal generation circuit 15 that generates PM transfer data from the ADIP address determined by the address protection circuit 13 and the AUX data latched in the data latch correction circuit 12, and outputs a PM signal while synchronizing at the PM transfer timing. It is composed of

FIG. 8 shows an example of a method for converting the detected LPP data into PM transfer data and a recording control method of an ECC block for the optical disc 1 performed in the optical disc recording device of FIG. An overview will be given. In FIG. 8, the LPP data is a 3-byte ECC address and a 6-byte A as shown in FIG. 3 (c).
It consists of UX data and parity A and B. In FIG.
A series of LPP data D (N) to D detected by the PM conversion circuit 24
ECC address values 0300 to 0030 for (N + 3)
3, AUX data a (N) to a (N + 23) are shown. In the optical disc control circuit 8, the recording unit on the optical disc 1 is performed in the ECC block unit, and the PM detection circuit 2
2 detects each sync signal of word sync and bit sync for PM format, ADIP address, and AUX data detection. As for the ADIP address for the ECC address obtained by detecting the LPP data, the LPP address value is left shifted by 2 bits (multiplied by 4), and the lower 2 bits are 0
A continuous value in which 3 is sequentially inserted is given. Further, as shown in FIG. 2 (a), the ADIP address corresponds to the ECC block corresponding to the track section where the LPP data is detected, from the next ECC block 32T × 16wobble to the ECC block end 32T × 16wobble.
Since it is transferred as a PM signal in the previous track section and four ADIP addresses are included in that section, a value that is +4, for example, is given to the ADIP address and transferred as a PM signal. As for AUX data, 6 bytes exist for each LPP data, and 4 bytes data required for transfer are selected from them (in Fig. 8, the first 4 bytes are selected from 6 bytes of AUX data), and then ADIP Modulate and transfer to PM signal together with address. The determined ADIP address and bit data of 4 bytes of AUX data are converted into a pulse train according to the PM format shown in FIG. 2A and modulated as a PM signal. The generation of the ADIP address described above is based on the detected EC.
Not only the address value obtained by adding +4 to the C address value may be adopted, but also the value obtained by adding -4 or the value obtained without correcting by +4 and -4 may be used as it is.

Next, the recording control of the ECC block data on the recording track on the optical disc from the detection of the information modulated in the transferred PM signal, which is performed in the optical disc control circuit 8, will be described. In Figure 8, PM
The detection result of the information included in the transferred PM signal, which is performed by the detection circuit 22, is shown. The ADIP address value after detection of the last bit sync and data bit of the ADIP word,
Detect 1 byte of AUX data. The recording control circuit 18 detects a match between the detected ADIP address value and the recording start ADIP address set by the microcomputer 9, and when they match, generates a recording control signal to the modulation circuit 17. As an example, the recording control signal controls the modulation process and the generation start of the recording signal from the first 32 bytes onward of the ECC data 0, and controls the generation of the recording signal at the first 32 bytes of the dummy ECC data for ending the recording. The modulation circuit generates a recording signal while performing a modulation process on the input ECC data according to the recording control signal. The recording signal is modulated into recording pulses and formed as recording marks on the recording track on the optical disc 1 while synchronizing the data frame from the beginning of the dummy data with the wobble position.

FIG. 9 is performed in the optical disc recording apparatus of FIG. 7 and is for controlling the rotation of the optical disc 1.
The figure shows the PM signal transfer timing and the PM signal generation method. In FIG. 9, the sync detection protection circuit 10 detects the LPP sync for the even frame position or the odd frame position from the reproduced LPP signal, measures the detection cycle, and detects the LPP sync by protection. The frame number counter included in the frame timing generation circuit 14 indicates the position of one sector 26 frames from the detection of the LPP sync, and the frame counter indicates the position within one frame (1488T). Each counter is synchronized by detecting the LPP sync and subsequent data bit detection.

As for the PM transfer timing, as shown in FIG. 2A, the relationship between the frame head in the PM format and the word sync and bit sync head positions is 32T ahead of the frame.
Since x16 wobble = 512T, it is generated by decoding the maximum value 1487-512 of the frame counter. Regarding PM signal generation, word sync generation is performed at the PM transfer timing when the frame number counter value is 25, and 32T × 4wobble = 128T width is generated by decoding the frame counter value. In the same way, the bit sync generation generates a 32T × 1wobble width for every two frames, and the data bit generation similarly generates 32T × in the generation position for data 0 or data 1 depending on the data bit value (0 or 1) to be transferred. 2wobb
produces the le width.

Therefore, in the PM transfer timing and the generated PM signal, the fluctuation of the optical disc rotation speed is reflected in the PM signal transfer timing by the frame counter that follows the fluctuation of the LPP detection period.

Note that the frame number counter and the frame counter are frequency dividing counters, and even when the LPP sync is not detected, the PM transfer timing is generated at the predicted timing when the counter synchronization is performed by the previous detection, and the PM signal is generated. The synchronized transfer is performed.

FIG. 10 shows the LPP data detection processing in the PM conversion circuit 24, the PM data generation processing, the PM detection processing performed in the optical disk controller circuit 8, and the rotation control timing generation. In FIG. 10, 1 ECC
LPP decoding processing and PM data generation are performed once for each block. Further, ADIP decoding processing for the transferred PM signal is performed four times for each ECC block. In addition, the optical disc controller circuit 8 performs ADIP decoding processing on the transferred PM signal and generates rotation control timing. FIG. 10 shows, as an example of the rotation control timing, a state in which synchronization is performed by detecting a word sync and a bit sync. Rotation control circuit 2
At 0, a control signal is generated by phase comparison between the pulse appearance cycle of the rotation control timing and the reference timing, and the optical disk rotation control is performed at the target rotation speed.

Even if the word sync and the bit sync included in the PM signal are not detected, the pulse is interpolated at the predicted timing generated from the previous detection to prevent the pulse loss,
Performs stable rotation control. Regarding the word sync and bit sync synchronization of the rotation control timing, only the word sync is synchronized, and the bit sync string K (K is a positive integer)
A method of synchronizing once for each piece is also possible.

[0038]

As described above, according to the present invention, PM
The recording control and the optical disc rotation control for the optical disc of the format can be performed in the optical disc recording device corresponding to the optical disc of the LPP format.
Further, by providing a means for selecting the LPP signal generated and the LPP signal reproduced from the LPP format optical disc, PM
It is possible to configure an optical disc recording device compatible with optical disc recording in each of the formats and LPP format.

Further, the recording control and the optical disc rotation control for the LPP format optical disc can be performed in the optical disc recording apparatus corresponding to the PM format optical disc. Further, by providing means for selecting the generated PM signal and the PM signal reproduced from the PM format optical disk, it is possible to configure an optical disk recording apparatus compatible with optical disk recording in each of the PM format and the LPP format.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of an optical disk recording device according to the present invention.

FIG. 2 is a diagram showing a configuration example of a PM format.

FIG. 3 is a diagram showing a configuration example of an LPP format.

FIG. 4 is a diagram showing LPP transfer data generation and recording on an optical disc.

[Fig. 5] Depends on detection timing of word and bit sync
The figure which shows the synchronizing method of a LPP signal.

FIG. 6 is a diagram showing the relationship between ADIP word detection, LPP data generation operation, and rotation CLV control timing generation.

FIG. 7 is a diagram showing a second embodiment of the optical disc recording apparatus according to the present invention.

FIG. 8 is a diagram showing generation of PM transfer data and recording operation on an optical disc.

FIG. 9 is a diagram showing a method of synchronizing a PM signal with a detection timing of an LPP synchronization signal.

FIG. 10 is a diagram showing the relationship between LPP data detection, PM data generation operation, and rotation control timing generation.

[Explanation of symbols]

1 ... Optical disc, 2 ... Optical head, 3 ... Laser driver, 4 ... Spindle motor, 5 ... Motor driver, 6 ...
Analog front end, 7 ... LPP conversion circuit, 8 ... Optical disc control circuit, 9 ... Microcomputer, 10 ... Sync detection protection circuit, 11 ... Data bit determination circuit, 12 ... Data latch correction circuit, 13 ... Address protection circuit, 14 ... Frame Timing generation circuit, 15 ... LPP signal generation circuit,
16 ... Selector, 17 ... Modulation circuit, 18 ... Recording control circuit, 19 ... LPP detection circuit, 20 ... Rotation control circuit, 21 ...
Phase modulation section detection circuit, 22 ... PM detection circuit, 23 ... PM signal generation circuit, 24 ... PM conversion circuit.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Misuzu Mochizuki             292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa             Ceremony Hitachi Digital Media Development Book             Department (72) Inventor Satoshi Sato             292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa             Ceremony company Hitachi Image Information System F term (reference) 5D044 BC02 CC04 DE38 EF05 FG19                       HL20                 5D090 AA01 CC01 CC04 GG17 GG28                       HH01 HH03                 5D109 KA04 KB04 KD13

Claims (13)

[Claims] 1. A data transfer method for detecting address information and additional information on a phase-modulated optical disc for a reproduction wobble signal from an optical disc of a wobble phase modulation format and transferring data including the detected information. In transferring the information generated based on the detection information,
A data transfer method characterized in that data is transferred while being synchronized at the current detection timing of a phase-modulated sync signal. 2. A data transfer method for detecting address information and additional information on a phase-modulated optical disc for a reproduction wobble signal from an optical disc of a wobble phase modulation format and transferring data including the detected information. When converting a plurality of detected address information to address information for a data block which is a recording unit on an optical disc and transferring information including the conversion result, it is equivalent to the next data block. A data transfer method characterized in that the wobble is transferred while being reproduced. 3. A wobble phase modulation format, or
An optical disc recording device for performing recording control on a data block basis for an optical disc of land pre-pit format, wherein address information on the optical disc from a wobble phase modulation unit,
First detecting means for detecting additional data, judging means for judging a data block address from a series of plural pieces of address information, and data for transfer data including the block address in accordance with the land pre-pit format are generated. Generating means for generating the first transfer signal in the data block period, second transfer signal obtained by land pre-pit reproduction on the optical disk, selecting means for selectively outputting the first transfer signal, and transfer after selection. An optical disc comprising: a second detecting means for detecting a block address included in the signal; and a controlling means for specifying a target track position from the detected block address and controlling generation and output of a modulation signal. Recording device. 4. A wobble phase modulation format, or
An optical disk recording device for performing recording control in units of data blocks while controlling optical disk rotation on an optical disk of land pre-pit format, which detects a first synchronization signal from a wobble phase modulation unit and adds address information on the optical disk. First detecting means for detecting data and data including a second synchronizing signal conforming to the land pre-pit format for transfer data including address information are generated and synchronized with the detected first synchronizing signal. Included in the generation means for generating the first transfer signal, the second transfer signal obtained by the land prepit reproduction on the optical disc, the selection means for selectively outputting the first transfer signal, and the transfer signal after the selection. The second detecting means for detecting the second synchronizing signal and the optical disc rotation speed are controlled by the appearance period of the second synchronizing signal. Optical disk recording apparatus characterized by comprising a control means. 5. A data transfer method for detecting address information and additional information on a phase-modulated optical disk for a reproduction wobble signal from an optical disk of wobble phase modulation format and transferring data including the detected information. And a series of address information 2n (n is a positive integer n ≧ 1) for one data block which is a recording unit on the optical disc.
A data transfer method, wherein a block address when each is assigned is included in a data block and an n-bit right shift value of a detected address value is given. 6. The data transfer method according to claim 5, wherein the block address gives a value obtained by adding +1 or -1 to the n-bit right shift value of the detected address value. Method 7. A reproduced land pre-pit signal from an optical disc of land pre-pit format is detected to detect address information and additional information on the modulated optical disc,
A data transfer method for transferring data including the detection information. When transferring information generated based on the detection information, transfer is performed while synchronizing with the current detection timing of the modulated sync signal. A data transfer method characterized by the above. 8. A reproduced land pre-pit signal from an optical disc of land pre-pit format detects address information and additional information on the modulated optical disc,
A data transfer method for transferring data including the detection information, wherein a data block, which is a recording unit on the optical disc, is 2n (n is a positive integer and n ≧ 1) from the detected first address information.
1) When converting 2n pieces of second address information for each of the divided sub blocks and transferring 2n pieces of information including the conversion result, the land pre-pit reproduction corresponding to the next data block is completed. The data transfer method is characterized in that it is transferred up to. 9. A wobble phase modulation format, or
An optical disk recording device for performing recording control on a data block basis for an optical disk of land pre-pit format, comprising: first detecting means for detecting first address information and additional data on the optical disk from a reproduction land pre-pit signal, First generation means for generating 2n pieces of second address information (n is a positive integer and n ≧ 1) from the first address information, and wobbles for 2n pieces of transfer data including the second address information, respectively. Second generation means for generating data according to the phase modulation format and for generating a first transfer signal in the next data block period; a second transfer signal obtained by wobble reproduction on the optical disc; Selecting means for selectively outputting the transfer signal, and first detecting the address information included in the selected transfer signal.
2. An optical disk recording apparatus comprising: a detecting unit (2); and a control unit that specifies a target track position from the detected address information and controls the generation and output of a modulation signal. 10. An optical disc recording apparatus for performing recording control in data block units while performing optical disc rotation control on an optical disc of wobble phase modulation format or land prepit format, wherein a first optical disc is provided from a reproduction land prepit signal. A first detecting means for detecting a sync signal to detect address information and additional data on the optical disk, and a data including a second sync signal conforming to a wobble phase modulation format for transfer data including the address information are generated. At the same time, first generating means for generating a first transfer signal synchronized with the detected first synchronization signal, a second transfer signal obtained by reproduction of land pre-pits on the optical disc, and a first transfer signal. Selecting means for selectively outputting and a second detecting means for detecting a second synchronizing signal included in the transfer signal after selection. An optical disc recording apparatus comprising: a control unit that controls an optical disc rotation speed based on an appearance cycle of the second synchronization signal. 11. A data transfer for detecting address information and additional information on a modulated optical disc of a reproduced land pre-pit signal from an optical disc of land pre-pit format and transferring data including the detected information. A method, wherein 2n (n is a positive integer, n ≧
1) A data transfer method, characterized in that when generating 2nd block addresses, an n-bit left shift value of a detected first address information value included in a data block is given. 12. The data transfer method according to claim 11, wherein the generated 2n second block addresses have continuous values from the address value for the head of the data block. Method. 13. The data transfer method according to claim 11, wherein the generated second block address is +2 with respect to the n-bit left shift value of the detected first address information value.
A data transfer method, wherein a value obtained by n or -2n is given.