JP2002352520A - Device and method for recording, device and method for reproducing, recording medium, program, and disk medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly and accurately access an optional address. SOLUTION: In a step S1, an address generating part generates synchronizing signals, address data, and address information containing error-correcting codes for the address data to be recorded in an optical disk, and pre-encodes them to be outputted to a modulating part. In a step S2 for generating a carrier signal carrying the address information to be outputted to the modulating part, the modulating part changes and modulates a frequency based on pre-encode address information inputted from the carrier signal generating part, and outputs the obtained frequency changing and modulating signal to a wobble forming part. In a step S3, the wobble forming part spirally forms a groove wobbled forms according to the frequency changing and modulating signal inputted from the modulating part in an optical disk.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus and method, a reproducing apparatus and method, a recording medium, a program, and a disk medium.
The present invention relates to a recording apparatus and method, a reproducing apparatus and method, a recording medium, a program, and a disk medium that can record address information as wobble of a groove.

[0002]

2. Description of the Related Art Conventionally, a disk medium such as an optical disk, a magnetic disk, and a magneto-optical disk has a spiral groove formed for tracking.
In addition, the groove is wobbled according to the address information.
It is known to record address information by wobbling.

For example, CD-R (Compact Disc-Recordable)
And MD (Mini-Disc) are formed with grooves that are spiral and wobbled in correspondence with a carrier signal that is FM-modulated based on address information (hereinafter referred to as an FM-modulated signal). ing.

[0004]

However, in the method of wobbling the groove corresponding to the FM modulation signal, the address information cannot be detected with high accuracy.
When recording data on a disk medium and reproducing the recorded data, an arbitrary address cannot be accessed with high accuracy. for that reason,
When recording data on a disk medium, it is necessary to provide a very large link area (an area where no data is recorded) before and after the data, and there is a problem that the recording area of the disk medium is wasted.

The present invention has been made in view of such a situation, and an object of the present invention is to make it possible to quickly and accurately access an arbitrary address by enabling accurate reproduction of address information.

[0006]

According to the present invention, there is provided a recording apparatus for generating address information comprising a synchronization signal including a plurality of sync unit patterns, address data, and an error correction code of the address data. A modulation means for frequency-shift-modulating a carrier signal in accordance with the address information generated by the means, and a frequency-shift-modulated signal; and a spiral-shaped, frequency-shift-modulated signal generated by the modulation means. Forming means for forming a correspondingly wobbled groove on a disk medium.

An optical disk can be used as the disk medium.

The modulating means may frequency shift modulate the carrier signal in accordance with the address information generated by the generating means, and generate a frequency shift modulation signal comprising an unmodulated part and a modulated part. it can.

The frequency of the unmodulated portion of the frequency shift keying signal is the same as the frequency of the carrier signal, and the frequency of the modulation portion of the frequency shift keying signal is １ ／ of the frequency of the carrier signal. be able to.

The modulating means generates a frequency shift keying signal in which a non-modulated portion and a modulated portion are arranged in a first order in accordance with 1-bit data "0" of the address information. In response to the 1-bit data “1”, the non-modulated portion and the modulated portion are arranged in the second order to generate the second pattern of the frequency shift keying signal. The order of 2 may be the reverse of the first order.

The recording method according to the present invention is generated by a generating step of generating address information composed of a synchronization signal including a plurality of sync unit patterns, address data, and an error correction code of the address data, and a processing of the generating step. Frequency shift modulation of the carrier signal in accordance with the address information, and a modulation step of generating a frequency shift modulation signal, and a frequency shift modulation signal having a spiral shape and generated in the processing of the modulation step. Forming a correspondingly wobbled groove on the disk medium.

[0012] The program of the first recording medium of the present invention comprises:
A generating step of generating address information composed of a synchronization signal including a plurality of sync unit patterns, address data, and an error correction code of the address data; and generating a carrier signal corresponding to the address information generated in the processing of the generating step. A modulation step of performing frequency shift keying and generating a frequency shift keying signal; and a groove formed in a spiral shape and wobbled corresponding to the frequency shift keying signal generated in the processing of the modulation step. And a forming step.

A first program according to the present invention comprises a synchronizing signal including a plurality of sync unit patterns, address data,
Generating an address information composed of error correction codes of address data and address data, and generating a frequency shift keyed signal by frequency shift modulation of the carrier signal corresponding to the address information generated in the processing of the generating step And causing the computer to execute a forming step of forming, on a disk medium, a groove that is wobbled in correspondence with the frequency shift keying signal that is spiral and generated in the processing of the modulating step. Features.

According to the present invention, there is provided a reproducing apparatus for irradiating a disk medium with laser light, receiving light reflected from the disk medium and generating a reflected light signal corresponding to the reflected light, and light receiving means. Generating means for generating a wobble signal corresponding to the groove wobble based on the reflected light signal generated by the generating means, and extracting means for removing a noise component from the wobble signal generated by the generating means and extracting a frequency shift keying signal. Identifying means for identifying a modulated part and a non-modulated part of the frequency shift keying signal extracted by the extracting means, and a synchronization signal including a plurality of sync unit patterns, address data, and an address corresponding to the identification result of the identifying means. Restoring means for restoring address information composed of an error correction code of data, and a plurality of addresses included in a synchronization signal of the address information restored by the restoring means. Detecting means for detecting at least one of the link unit patterns, obtaining means for obtaining address data and an error correction code of the address data from the address information based on the position of the sync unit pattern detected by the detecting means, and obtaining means And reproducing means for reproducing the address using the acquired address data and the error correction code of the address data.

An optical disk can be used as the disk medium.

According to the reproducing method of the present invention, there are provided an irradiation step of irradiating a laser beam to a disk medium, a light receiving step of receiving reflected light from the disk medium and generating a reflected light signal corresponding to the reflected light, and a light receiving step. Generating a wobble signal corresponding to the wobble of the groove based on the reflected light signal generated by the processing of the step, and removing a noise component from the wobble signal generated by the processing of the generation step to obtain a frequency shift keying signal. An extracting step of extracting a modulated part and an unmodulated part of the frequency shift keying signal extracted in the processing of the extracting step, and a plurality of sinks corresponding to the identification result in the processing of the identifying step. Restores address information including a synchronization signal including a unit pattern, address data, and an error correction code of the address data. An original step, a detecting step of detecting at least one of a plurality of sync unit patterns included in the synchronization signal of the address information restored in the processing of the restoring step, and a sync unit pattern detected in the processing of the detecting step. An acquisition step of acquiring address data and an error correction code of the address data from the address information based on the position; and a reproduction step of reproducing an address using the address data and the error correction code of the address data acquired in the processing of the acquisition step. It is characterized by including.

The program of the second recording medium of the present invention comprises:
An irradiation step of irradiating the disk medium with laser light, a light receiving step of receiving reflected light from the disk medium and generating a reflected light signal corresponding to the reflected light, and a reflected light signal generated in the processing of the light receiving step. A generating step of generating a wobble signal corresponding to the wobble of the groove, a noise component being removed from the wobble signal generated in the processing of the generating step, and an extracting step of extracting a frequency shift keying signal; An identification step of identifying a modulation part and a non-modulation part of the frequency shift keying signal extracted in the processing, and a synchronization signal including a plurality of sync unit patterns, address data, A restoring step of restoring address information composed of error correction codes of address data and address data; Detecting at least one of a plurality of sync unit patterns included in the synchronization signal of the address information restored in step (a), and detecting the address from the address information based on the position of the sync unit pattern detected in the processing of the detecting step. It is characterized by including an obtaining step of obtaining data and an error correction code of address data, and a reproducing step of reproducing an address using the address data and the error correction code of the address data obtained in the processing of the obtaining step.

According to a second program of the present invention, an irradiating step of irradiating the disk medium with laser light, a light receiving step of receiving reflected light from the disk medium and generating a reflected light signal corresponding to the reflected light, A generation step of generating a wobble signal corresponding to the wobble of the groove based on the reflected light signal generated in the processing of the light receiving step; and removing a noise component from the wobble signal generated in the processing of the generation step to perform frequency shift. An extraction step of extracting a modulation signal, and an identification step of identifying a modulation part and a non-modulation part of the frequency shift modulation signal extracted in the processing of the extraction step,
Restoration step of restoring address information composed of a synchronization signal including a plurality of sync unit patterns, address data, and an error correction code of the address data in accordance with the identification result in the processing of the identification step, and processing of the restoration step Detecting at least one of a plurality of sync unit patterns included in the synchronization signal of the address information restored in step (a), and detecting the address from the address information based on the position of the sync unit pattern detected in the processing of the detecting step. The computer is configured to execute an acquisition step of acquiring an error correction code of data and address data, and a reproduction step of reproducing an address using the address data and the error correction code of the address data acquired in the processing of the acquisition step. And

The disk medium of the present invention has a frequency shift corresponding to address information which is spiral and includes a synchronization signal including a plurality of sync unit patterns, address data, and an error correction code of the address data. A wobbled groove is formed corresponding to the modulation signal.

An optical disk can be used as the disk medium.

The recording apparatus and method of the present invention, and the first
In the program, address information composed of a synchronization signal including a plurality of sync unit patterns, address data, and an error correction code of the address data is generated, and the carrier signal is shifted in frequency in accordance with the generated address information. The modulated frequency shift keying signal is generated, and a spiral groove and a wobbled groove corresponding to the generated frequency shift keying signal are formed on the disk medium.

The reproducing apparatus and method of the present invention, and the second
In the above program, the disk medium is irradiated with laser light, the reflected light from the disk medium is received, a reflected light signal corresponding to the reflected light is generated, and a groove wobble is generated based on the generated reflected light signal. A wobble signal is generated, and a noise component is removed from the generated wobble signal to extract a frequency shift keying signal. Also,
The modulation part and the non-modulation part of the extracted frequency shift keying signal are identified, and corresponding to the identification result, are composed of a synchronization signal including a plurality of sync unit patterns, address data, and an error correction code of the address data. Address information is restored. Further, at least one of a plurality of sync unit patterns included in the restored address information synchronization signal is detected, and based on the detected position of the sync unit pattern, address data and an error correction code of the address data are obtained from the address information. Is obtained, and the address is reproduced using the obtained address data and the error correction code of the address data.

In the disk medium of the present invention, the frequency deviation corresponding to the address information which is spiral and includes a synchronization signal including a plurality of sync unit patterns, address data, and an error correction code of the address data is provided. A wobbled groove is formed corresponding to the shift modulation signal.

[0024]

FIG. 1 shows an example of a configuration of an address recording apparatus according to an embodiment of the present invention. When manufacturing the optical disk, the address recording device is provided with a spiral groove for tracking as shown in FIG. 2 and a wobble groove corresponding to the address information as shown in FIG. It is formed in.

In the address recording apparatus, the address generator 1 generates and pre-encodes digital data address information including a synchronizing signal for indicating the position of the address data, address data, and an error correction code of the address data. And outputs the result to the modulator 3.

The carrier signal generator 2 generates a carrier signal carrying address information and outputs the carrier signal to the modulator 3.

The modulation section 3 converts a carrier signal input from the carrier signal generation section 2 into frequency shift keying (FSK (Frequency Shift Keying) modulation) in accordance with the pre-encoded address information from the address generation section 1. Then, a frequency shift keying signal corresponding to the obtained address information is output to the wobble forming section 4.

As shown in FIG. 4A, the unmodulated portion of the frequency shift keying signal, which is composed of 8 wobbles (8 wobbles for 8 cycles) of the carrier signal itself, is a code of pre-encoded address information. 0 ". Also, as shown in FIG. 4B, four waves of a signal having a half frequency (double wavelength) of the carrier signal (eight of the carrier signal).
(Corresponding to a wobble) corresponds to the code "1" of the pre-encoded address information. Hereinafter, when describing the wave number of the modulation portion,
The number of wobbles of the corresponding carrier signal is also used.

For example, a frequency shift keying signal as shown in FIG. 4C corresponds to the code "10011" of the pre-encoded address information.

The wobble forming section 4 forms a groove wobbled on the optical disk 5 in a spiral manner in accordance with the frequency shift keying signal inputted from the modulating section 3.

As shown in FIG. 5, one bit of the address information is classified into a monotone bit (monotone bit) consisting of an unmodulated portion of 84 wobbles, an ADIP bit including a modulated portion in 84 wobbles, and the like. .

The control unit 6 controls the drive 7 to read a control program stored in the magnetic disk 8, the optical disk 9, the magneto-optical disk 10, or the semiconductor memory 11, and based on the read control program. It controls the entire address recording device.

FIG. 6 shows a recording / reproducing cluster of the optical disk 5.
3 shows a structure of address information recorded corresponding to a RUB (Recording Unit Block). The recording and playback cluster RUB has two pieces of address information (ADIP: Address In Pre-groov).
e) is recorded. One piece of address information consisting of 83 bits is an 8-bit sync part (SYNC) indicating a synchronization signal.
And 7 indicating address data and its error correction code.
It consists of a 5-bit data part (Data).

FIG. 7 shows the structure of an 8-bit sync part. As shown in the figure, the sync part includes one monotone bit and one bit of sync bit (S
yncbit) and four sync blocks “1” to “4”.

As shown in FIG. 8, the sync bit of 1 bit (84 wobbles) is composed of a sync unit of 48 wobbles including a modulation portion and a monotone (unmodulated portion) of 36 wobbles.

FIGS. 8A to 8D show wobbles corresponding to sync blocks "1" to "4", that is, frequency shift keying signals.

The sync unit of the sync block "1" is formed as a wobble indicating the first sync unit pattern "010111" as shown in FIG. The sync unit of the sync block “2” is shown in FIG.
The second sync unit pattern “0” as shown in FIG.
The sync unit is formed as a wobble indicating “11011”. The sync unit of the sync block “3” is a third sync unit pattern “011101” as shown in FIG.
Are formed as wobbles. Sync block ”
The 4 ″ sync unit is a fourth unit as shown in FIG.
Is formed as a wobble indicating the sync unit pattern “011110”.

The 8-bit sync part includes all of the above-described first to fourth patterns.
At the time of reproduction, if at least one of the first to fourth patterns can be reproduced, the position of the sync part can be determined, that is, address information can be accurately reproduced.

FIG. 9 shows the structure of a 75-bit data part. As shown in FIG.
15 ADIP blocks "1" to "ADIP block" consisting of a monotone bit of 4 bits and an ADIP bit of 4 bits
15 ".

As shown in FIG. 10A, one monotone bit constituting the ADIP block comprises an unmodulated portion of 84 wobbles. As shown in FIG. 10B, one of the four ADIP bits forming the ADIP block is composed of a 16-wobble ADIP unit including a modulation portion of the first or second ADIP unit pattern, and a 68-wobble ADIP unit. Of the non-modulated part of

1 of address data in address information
The ADIP unit of the ADIP bit corresponding to the digital data “1” of the bit is the first ADIP unit pattern “1”.
0 ", that is, an unmodulated portion of 8 wobbles and a modulated portion of 4 waves (8 wobbles). Also, 1-bit digital data of address data of the address information"
The ADIP unit of the ADIP bit corresponding to "0"
The IP unit pattern "10", that is, a modulation portion of 4 waves (8 wobbles) and a non-modulation portion of 8 wobbles.

FIG. 11 shows address data and its error correction code. 28 bits (= 7 nibbles (nib
ble)) address data, an error correction code (Parity) of 32 bits (= 8 nibbles) is added. In addition,
The breakdown of 28-bit address data is 20-bit RU
B number, 2-bit RUB address number, 2-bit information for a multi-layer disc, and 4-bit reserve. As the error correction method, a nibble-based Reed-Solomon code RS (15, 7, 9) is used.

Next, the address recording process of the address recording device will be described with reference to the flowchart of FIG.

In step S1, the address generator 1
Generates address information including a synchronization signal to be recorded on the optical disk 5, address data, and an error correction code of the address data, pre-encodes the information, and outputs it to the modulation unit 3. At the same time, the carrier signal generator 2 generates a carrier signal carrying address information and outputs the carrier signal to the modulator 3.

In step S2, the modulation unit 3 performs frequency shift modulation on the carrier signal input from the carrier signal generation unit 2 with the pre-encoded address information input from the address generation unit 1, and obtains the obtained frequency. The shift modulation signal is output to the wobble forming section 4.

In step S3, the wobble forming section 4
Forms a groove wobbled on the optical disk 5 in a spiral manner in accordance with the frequency shift keying signal input from the modulation unit 3.

As described above, according to the address recording processing by the address recording apparatus, if any one of them can be detected, the position of the synchronization signal can be specified. Is included in the synchronization signal to generate address information, and the groove can be wobbled in accordance with the frequency shift keying signal corresponding to the address information to form the groove on the optical disc 5.

As a result, it is possible to realize the optical disk 5 having extremely high address position detection accuracy. Therefore, there is no need to provide a useless area such as a link area in the data recording area, and the optical disc 5 that can effectively use the data recording area can be realized.

Next, FIG. 13 shows an example of the configuration of an optical disk drive for recording and reproducing arbitrary data on and from the optical disk 5 on which address information is recorded as groove wobbles by the above-described address recording apparatus. Is shown.

In the optical disk drive, a control circuit 21 controls each part of the optical disk drive based on a control program recorded on a recording medium 22.
Specifically, the external A through the AV interface 23
The respective sections of the optical disk drive are controlled in accordance with a recording command input from a V device or the like (not shown), and a mark corresponding to recording data input from an AV device or the like is recorded on the optical disk 5. In response to a playback command input from an external AV device or the like via the AV interface 23, each unit of the optical disk drive is controlled to
The recorded data is read out to reproduce the recorded data, and output to an external AV device or the like via the AV interface 23.

The spindle circuit 24 controls the rotation of the spindle motor 26 based on a command from the control circuit 21. The servo circuit 25 causes the optical pickup 27 to seek to an address instructed by the control circuit 21,
The focus servo and tracking servo of the optical pickup 27 are controlled based on the focus error signal and the tracking error signal input from the optical head circuit 28. The spindle motor 26 drives the optical disk 5 to rotate based on control from the spindle circuit 24.

An optical pickup 27 composed of a laser output system, a reflected light receiving system, a two-axis actuator, etc. forms a mark by irradiating the optical disk 5 with a laser beam under the control of an optical head circuit 28 during recording. I do. The optical pickup 27 irradiates the optical disk 5 with laser light during recording and reproduction, receives the reflected light, generates a corresponding reflected light signal, and generates a corresponding reflected light signal.
8 is output.

At the time of recording, the optical head circuit 28
The optical pickup 27 corresponding to the header signal input from the recording / reproducing circuit 29 or the binarized signal subjected to the recording compensation.
Control the laser output. The optical head circuit 28 generates an RF signal corresponding to embossed pits or marks recorded on the optical disk 5 based on the reflected light signal from the optical pickup 27 during reproduction, and
9 is output. Further, the optical head circuit 28 generates a focus error signal and a tracking error signal based on the reflected light signal from the optical pickup 27 at the time of recording and reproduction, and outputs the focus error signal and the tracking error signal to the servo circuit 25.
ush pull) signal is generated and output to the wobble circuit 32.

The recording / reproducing circuit 29 compensates for the recording of the binary signal from the modulation / demodulation circuit 30 and supplies the binary signal to the optical head circuit 28 under the control of the control circuit 21 during recording. Further, at the time of reproduction, the recording / reproducing circuit 29 converts the RF signal from the optical head circuit 28 into binary data, and supplies it to the modulation / demodulation circuit 30.

The modulation / demodulation circuit 30 modulates the recording data with the error correction code input from the error correction circuit 31 during recording based on the control from the control circuit 21.
The obtained binary signal is output to the recording / reproducing circuit 29. Further, at the time of reproduction, the modulation / demodulation circuit 30 demodulates the binary signal from the recording / reproduction circuit 29 and outputs the obtained reproduction data to the error correction circuit 31.

The error correction circuit 31 adds an ECC (Error Correction Code) to recording data supplied from an external AV device or the like via the AV interface 23 at the time of recording based on control from the control circuit 21. Output to the modulation / demodulation circuit 30. The error correction circuit 31 corrects an error in the reproduction data input from the modulation / demodulation circuit 30 at the time of reproduction based on the ECC.
And outputs it to an external AV device or the like via.

The wobble circuit 32 includes an optical head circuit 28
Generates and demodulates a wobble signal (a frequency shift keying signal containing noise or the like) corresponding to the groove wobble based on the pp signal input from the CPU, and obtains address information (synchronization signal, address data, and Error correction code) to the address decoder / timing generator (D
EC / TG) 33.

The address decoder / timing generator 33 detects the position of the sync part by detecting at least one of the four types of sync unit patterns included in the sync part from the address information input from the wobble circuit 32. Then, an address is generated using the address data of the subsequent data part and its error correction code, and output to the control circuit 21. Also,
The address decoder / timing generator 33 generates a timing signal based on the detected sync part and supplies it to each circuit of the optical disk drive via the control circuit 21.

FIG. 14 shows an example of the configuration of a part related to a process of demodulating a wobble signal of the wobble circuit 32 and restoring address information.

In the wobble circuit 32, the wobble signal generated from the pp signal is converted to a band pass filter (BFP).
44, 43. In the band pass filter 41, only the frequency component of the carrier signal is extracted from the wobble signal and supplied to a PLL (Phase Locked Loop) unit. In the PLL section 42, the clock signal is adjusted and oscillated based on the carrier signal supplied from the band-pass filter 41, and is supplied to the modulation portion detection section 44.

On the other hand, the band-pass filter 43 removes noise components from the wobble signal, and only the frequency component of the carrier signal and its half frequency component (modulation portion) are removed.
That is, the frequency shift keying signal is supplied to the modulation part detection unit 44.

The modulation part detector 44 discriminates the modulation part and the non-modulation part of the frequency shift keying signal supplied from the band pass filter 43 based on the clock signal from the PLL part 42, and based on the discrimination result. Address information is restored.

Since the frequency of the unmodulated portion of the frequency shift keying signal is half the frequency of the modulated portion, the edge of the waveform of the modulated portion coincides with the edge of the unmodulated portion. Therefore, if the unmodulated part of the frequency shift keying signal is used for the phase error, the operation of the PLL 42 becomes more stable.

As described above, according to the optical disk drive, the position of the sync part can be detected by detecting at least one of the four types of sync unit patterns included in the sync part. As a result, the address data of the data part following the sync part and the error correction code thereof can be obtained, and the address can be generated using them, so that the address error rate during recording and reproduction can be improved. In addition, an arbitrary address on the optical disk 5 can be quickly and accurately accessed.

The present invention can be applied to a case where address information is recorded not only on the optical disk 5 but also on any kind of disk medium and is reproduced.

The series of processes described above can be executed by hardware, but can also be executed by software. When a series of processing is executed by software, a program constituting the software can execute various functions by installing a computer built into dedicated hardware or installing various programs. It is installed from a recording medium into a possible general-purpose personal computer or the like.

As shown in FIG. 1, the recording medium is a magnetic disk 8 (including a floppy disk) on which the program is recorded and an optical disk 9 which are distributed separately from the computer to provide the user with the program. (CD-R
OM (Compact Disc-Read Only Memory), DVD (Digital Vers
atile Disc), magneto-optical disc 10 (MD (Mini
Disc), or a package medium including the semiconductor memory 11 and the like, and a ROM or a hard disk or the like in which a program is recorded and provided to a user in a state of being incorporated in a computer in advance. You.

In this specification, the steps for describing the program recorded on the recording medium may be performed in a chronological order according to the described order. Alternatively, it also includes individually executed processing.

[0069]

As described above, according to the recording apparatus and method and the first program of the present invention, the recording apparatus and method are composed of a synchronization signal including a plurality of sync unit patterns, address data, and an error correction code of the address data. The carrier signal is frequency-shift-modulated in accordance with the address information to generate a frequency-shift-modulated signal, and the spiral and wobbled groove corresponding to the generated frequency-shift-modulated signal is generated. Since it is formed on the disk medium, it becomes possible to record address information on the disk medium that can accurately detect the position of the synchronization signal.

Further, according to the reproducing apparatus and method of the present invention and the second program, a frequency shift keying signal is extracted by removing a noise component from the generated wobble signal.
A modulation part and an unmodulation part of the extracted frequency shift keying signal are identified, and a synchronization signal including a plurality of sync unit patterns corresponding to the identification result, an address data, and an error correction code of the address data are configured. Since the address information is restored, any address can be quickly and accurately accessed.

Further, according to the disk medium of the present invention,
A groove that is wobbled in correspondence with a frequency-shift keying signal that is spiral and that includes address data composed of a synchronization signal including a plurality of sync unit patterns, address data, and an error correction code of the address data. Is formed, it is possible to quickly and accurately access an arbitrary address.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration example of an address recording device according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining a groove formed in a spiral shape.

FIG. 3 is a diagram for explaining wobble of a groove;

FIG. 4 is a diagram for explaining an unmodulated portion and a modulated portion of a frequency shift keying signal.

FIG. 5 is a diagram showing a monotone bit and an ADIP bit.

FIG. 6 shows address information corresponding to a recording / reproducing cluster RUB.
It is a figure showing the structure of (ADIP).

FIG. 7 is a diagram showing the structure of an 8-bit sync part.

FIG. 8 is a diagram showing four types of sync unit patterns included in a sync part.

FIG. 9 is a diagram showing a structure of a 75-bit data part.

FIG. 10 is a diagram showing two types of ADIP unit patterns.

FIG. 11 is a diagram for describing an error correction code of address data.

FIG. 12 is a flowchart illustrating an address recording process of the address recording device.

FIG. 13 is a block diagram illustrating a configuration example of an optical disk drive that reproduces address information from the optical disk 5.

14 is a block diagram illustrating a configuration example of a wobble circuit 32. FIG.

[Explanation of symbols]

1 address generator, 2 carrier signal generator, 3
Modulation unit, 4 wobble forming unit, 5 optical disk,
6 control unit, 7 drive, 8 magnetic disk,
9 optical disk, 10 magneto-optical disk, 11
Semiconductor memory, 21 control circuit, 22 recording medium,
32 wobble circuits, 41 bandpass filters,
42 PLL section, 43 bandpass filter, 44
Modulation part detector

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tamotsu Yamagami 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation F-term (reference) 5D044 BC02 CC04 DE38 DE57 DE70 EF05 FG19 GL40 5D090 AA01 BB04 CC01 DD03 EE12 FF07 FF31 FF43 GG03 GG28

Claims (15)

[Claims] 1. A recording apparatus for recording address information on a disk medium, comprising: a generator for generating the address information comprising a synchronization signal including a plurality of sync unit patterns, address data, and an error correction code of the address data. A modulation means for frequency-shift-modulating a carrier signal in accordance with the address information generated by the generation means to generate a frequency-shift-modulated signal; and a spiral, and generated by the modulation means. Recording means for forming a groove wobbled in accordance with the frequency shift keying signal on the disk medium. 2. The recording apparatus according to claim 1, wherein said disk medium is an optical disk. 3. The modulation unit performs frequency shift modulation on the carrier signal in accordance with the address information generated by the generation unit, and generates the frequency shift modulation signal including a non-modulation part and a modulation part. The recording apparatus according to claim 1, wherein: 4. The frequency of the unmodulated portion of the frequency shift keying signal is the same as the frequency of the carrier signal, and the frequency of the modulation portion of the frequency shift keying signal is the same as the frequency of the carrier signal. The recording apparatus according to claim 2, wherein the recording apparatus is ２. 5. The information processing apparatus according to claim 1, wherein the modulating means includes one of the address information.
In response to the bit data “0”, the non-modulation portion and the modulation portion are generated in the first order to generate the frequency shift keying signal, and the 1-bit data “1” of the address information is generated. Correspondingly, the unmodulated portion and the modulated portion generate the second pattern of the frequency shift keying signal arranged in a second order, wherein the second order is the reverse of the first order. The recording apparatus according to claim 2, wherein: 6. A recording method of a recording apparatus for recording address information on a disk medium, wherein the address information comprising a synchronization signal including a plurality of sync unit patterns, address data, and an error correction code of the address data is generated. Generating step, and performing a frequency shift modulation of the carrier signal in accordance with the address information generated in the processing of the generating step, a modulation step of generating a frequency shift modulation signal, spiral, and, Forming a groove wobbled on the disk medium in accordance with the frequency shift keying signal generated in the processing of the modulation step. 7. A recording program for recording address information on a disk medium, comprising: a synchronization signal including a plurality of sync unit patterns; address data; and an address correction code of the address data. A generating step to generate, a frequency shift modulation of a carrier signal corresponding to the address information generated in the processing of the generating step, a modulation step of generating a frequency shift modulation signal, and a spiral shape, and Forming a groove wobbled on the disk medium in accordance with the frequency shift keying signal generated in the processing of the modulation step. Recording media. 8. A computer for controlling a process of recording address information on a disk medium, wherein the computer generates the address information including a synchronization signal including a plurality of sync unit patterns, address data, and an error correction code of the address data. Generating step, and performing a frequency shift modulation of the carrier signal in accordance with the address information generated in the processing of the generating step, a modulation step of generating a frequency shift modulation signal, spiral, and, Forming a groove wobbled on the disk medium in accordance with the frequency shift keying signal generated in the processing of the modulation step. 9. A reproducing apparatus for reproducing an address of the disk medium based on a wobble of a groove formed on the disk medium, comprising: an irradiating means for irradiating the disk medium with a laser beam; A light receiving unit that receives light and generates a reflected light signal corresponding to the reflected light; a generating unit that generates a wobble signal corresponding to the wobble of the groove based on the reflected light signal generated by the light receiving unit; Extracting means for removing a noise component from the wobble signal generated by the generating means to extract a frequency shift keying signal; and identifying a modulated part and a non-modulated part of the frequency shift keying signal extracted by the extracting means. A synchronization signal including a plurality of sync unit patterns, address data, and the like, in accordance with the identification result of the identification unit. Restoring means for restoring address information composed of an error correction code of the address data, and at least one of the plurality of sync unit patterns included in the synchronization signal of the address information restored by the restoring means. Detecting means for detecting, obtaining means for obtaining the address data and the error correction code of the address data from the address information based on the position of the sync unit pattern detected by the detecting means, and obtaining by the obtaining means A reproducing unit that reproduces the address using the address data and the error correction code of the address data. 10. The reproducing apparatus according to claim 9, wherein the disk medium is an optical disk. 11. A reproducing method of a reproducing apparatus that reproduces an address of the disk medium based on a wobble of a groove formed on the disk medium, wherein: an irradiating step of irradiating the disk medium with laser light; A light receiving step of receiving reflected light and generating a reflected light signal corresponding to the reflected light; and a wobble signal corresponding to the wobble of the groove based on the reflected light signal generated in the processing of the light receiving step. A generating step of generating; an extracting step of removing a noise component from the wobble signal generated in the processing of the generating step to extract a frequency shift keying signal; and the frequency deviation extracted in the processing of the extracting step. An identification step of identifying a modulated portion and a non-modulated portion of the modulated signal; Corresponding to another result, a synchronization signal including a plurality of sync unit patterns, address data, and a restoration step of restoring address information composed of an error correction code of the address data; A detecting step of detecting at least one of the plurality of sync unit patterns included in the synchronization signal of the address information; and detecting the address information based on a position of the sync unit pattern detected in the processing of the detecting step. An obtaining step of obtaining the address data and the error correction code of the address data from an address, and reproducing the address using the address data and the error correction code of the address data obtained in the processing of the obtaining step. Characterized by including steps Play how to. 12. A reproducing program for reproducing an address of the disk medium based on a wobble of a groove formed on the disk medium, the method comprising: irradiating the disk medium with a laser beam; Receiving the reflected light, and generating a reflected light signal corresponding to the reflected light; and a wobble signal corresponding to the wobble of the groove based on the reflected light signal generated in the processing of the light receiving step. A generating step of generating a signal; an extracting step of removing a noise component from the wobble signal generated in the processing of the generating step to extract a frequency shift keying signal; and the frequency extracted in the processing of the extracting step. An identification step of identifying a modulated portion and a non-modulated portion of the shift keying signal; Corresponding to another result, a synchronization signal including a plurality of sync unit patterns, address data, and a restoration step of restoring address information composed of an error correction code of the address data; A detecting step of detecting at least one of the plurality of sync unit patterns included in the synchronization signal of the address information; and detecting the address information based on a position of the sync unit pattern detected in the processing of the detecting step. Obtaining the address data and the error correction code of the address data from the memory; and reproducing the address using the address data and the error correction code of the address data obtained in the processing of the obtaining step. Characterized by including steps Recording medium from which a computer readable program is recorded to. 13. An irradiation step of irradiating a laser beam to the disk medium to a computer for controlling a process of reproducing an address of the disk medium based on a wobble of a groove formed on the disk medium; A light receiving step of receiving reflected light and generating a reflected light signal corresponding to the reflected light; and a wobble signal corresponding to the wobble of the groove based on the reflected light signal generated in the processing of the light receiving step. A generating step of generating; an extracting step of removing a noise component from the wobble signal generated in the processing of the generating step to extract a frequency shift keying signal; and the frequency deviation extracted in the processing of the extracting step. An identification step of identifying a modulated part and an unmodulated part of the modulated signal; and A restoration step of restoring address information composed of a synchronization signal including a plurality of sync unit patterns, address data, and an error correction code of the address data in accordance with the identification result, and restoration in the processing of the restoration step A detecting step of detecting at least one of the plurality of sync unit patterns included in the synchronization signal of the address information; and detecting the address information based on a position of the sync unit pattern detected in the processing of the detecting step. An obtaining step of obtaining the address data and the error correction code of the address data from an address, and reproducing the address using the address data and the error correction code of the address data obtained in the processing of the obtaining step. Step and step Grams. 14. A frequency shift keying signal corresponding to address information composed of a spiral synchronization signal including a plurality of sync unit patterns, address data, and an error correction code of the address data. A disk medium characterized in that a wobbled groove is formed. 15. The disk medium according to claim 14, wherein said disk medium is an optical disk.