JP2001216648A - Optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently record data by starting recording of the data before a linear velocity becomes a reference value, that is, before revolution in a prescribed zone is stabilized and to avoid writing the data with a wrong clock when an address error occurs in recording. SOLUTION: This device detects how much the number of the revolution (linear velocity) of an optical disk is deviated based on the original number of the revolution and whether the revolution is under acceleration or deceleration, records the data by using a recording clock corresponding to it and when an address cannot be read, the device judges whether to continue recording in accordance with a state at the time to record the data efficiently.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a DVD-RAM.
The present invention relates to an optical disk device that records data on an optical disk such as an optical disk and reproduces the recorded data.

[0002]

2. Description of the Related Art Conventionally, there has been known an optical disk apparatus that records data on an optical disk having a recording track or reproduces data recorded on the optical disk by using a laser beam output from a semiconductor laser oscillator mounted on an optical head. Has been put to practical use.

The above optical disk is divided into a plurality of zones composed of a plurality of tracks in a radial direction of the optical disk, and each zone has the same number of sectors per track.

In the above-described optical disk apparatus, recording can be performed only at a substantially fixed linear velocity (the moving speed of the track on the optical disk by the laser light of the optical head is almost constant) due to the characteristics of the optical disk. For this reason, at the time of data recording, rotation is performed at a different rotation speed for each zone. That is, the number of revolutions is changed according to the radial direction of the recording position. When this rotation speed is stabilized, the semiconductor laser oscillator of the optical head is driven based on a modulation signal modulated based on a recording clock of a predetermined frequency. Data is recorded by forming pits.

Therefore, as described above, in an optical disk having a zone CLV in which the number of revolutions differs for each zone and recording is performed at a constant clock, the number of revolutions is changed when performing access across zones. Recording cannot be performed until the rotation speed is stabilized.

Therefore, there is a demand for a device capable of starting recording before the number of rotations is stabilized, thereby enabling efficient recording.

[0007]

According to the present invention, the number of rotations is stabilized when data is recorded on an optical disk composed of a plurality of zones of a plurality of tracks and when access is made across zones. There is a demand for a device capable of performing recording efficiently by being able to start recording before, and an object is to provide an optical disc device capable of performing recording efficiently by being able to start recording before the rotation speed is stabilized. I have.

[0008]

An optical disk apparatus according to the present invention is a device for recording data on an optical disk comprising a plurality of zones each having a plurality of tracks, wherein the optical disk is rotated at a different rotation speed for each zone. Rotating means for converging light, condensing means for condensing light on the optical disc, and moving the condensing means in a radial direction of the optical disc to move light condensed on the optical disc to each zone. Moving means, determining means for determining a relative speed between the light condensed by the condensing means and the optical disk, and generating means for generating a recording clock having a frequency based on the relative speed determined by the determining means; When performing recording in a zone different from the zone where the light condensed by the condensing unit is located, the condensing unit performs recording by the moving unit. Recording means for recording data on the basis of a recording clock generated by the generating means when the relative speed determined by the determining means becomes a speed close to the reference speed for the zone to be recorded. Consists of

An optical disk apparatus according to the present invention, in which data is recorded on an optical disk composed of a plurality of zones each having a plurality of tracks, includes a rotating means for rotating the optical disk at a different number of revolutions for each zone; A condensing means for condensing light on the optical disc; a moving means for moving light condensed on the optical disc by moving the condensing means in a radial direction of the optical disc to each zone; Determining means for determining the relative speed between the light collected by the optical means and the optical disk; generating means for generating a recording clock having a frequency based on the relative speed determined by the determining means; When performing recording in a zone different from the zone where the light to be illuminated is located, the converging unit moves to the zone where recording is performed by the moving unit. A modulating means for modulating data to be recorded based on a recording clock generated by the generating means, when the relative speed determined by the determining means becomes a speed close to a reference speed for a zone for performing recording, Recording means for recording data on the optical disk by changing the light condensed by the light condensing means based on the data modulated by the modulating means.

An optical disk device according to the present invention is a device for recording data on the optical disk while rotating the optical disk comprising a plurality of zones of a plurality of tracks at different rotational speeds for each zone. A condensing means for condensing light on the light; a moving means for moving the light condensed on the optical disc by moving the condensing means in a radial direction of the optical disc to each zone; Determining means for determining the relative speed between the light collected by the means and the optical disk; generating means for generating a recording clock having a frequency based on the relative speed determined by the determining means; When performing recording in a zone different from the zone where the light to be recorded is located, the converging unit is moved to the zone where recording is performed by the moving unit. When the relative velocity is determined by the determination means becomes a speed close to the reference speed for the zone to perform recording, and a recording means for recording the data based on the recording clock generated by said generating means.

An optical disk apparatus according to the present invention is characterized in that data is recorded on the optical disk in a state where an optical disk comprising a plurality of zones each having a plurality of tracks is rotated at a different rotation speed for each zone. A condensing means for condensing light on the light; a moving means for moving the light condensed on the optical disc by moving the condensing means in a radial direction of the optical disc to each zone; Determining means for determining the relative speed between the light collected by the means and the optical disk; generating means for generating a recording clock having a frequency based on the relative speed determined by the determining means; When performing recording in a zone different from the zone where the light to be recorded is located, the converging unit is moved to the zone where recording is performed by the moving unit. A modulating means for modulating data to be recorded based on a recording clock generated by the generating means when the relative speed determined by the determining means becomes a speed close to a reference speed for a zone in which recording is performed; Recording means for recording data on the optical disk by changing the light condensed by the light condensing means based on the data modulated by the means.

An optical disk apparatus according to the present invention has a groove and a land track for recording spiral or concentric data, and has a header section made up of a fixed length groove and a land made up of address data given to a head portion. A plurality of sectors each including a recording area on which data is recorded, and recording data on an optical disk including a plurality of zones each including the plurality of tracks, wherein the optical disk has a different rotation speed for each zone. Rotating means for rotating the optical disc, condensing means for condensing light on the optical disc, and light condensed on the optical disc by moving the condensing means in the radial direction of the optical disc to each zone. Moving means for moving, the relative speed between the light condensed by the light condensing means and the optical disc, Judgment means for judging from the transit time of the light in two matching sectors, generation means for generating a recording clock having a frequency based on the relative speed judged by the judgment means, and light condensed by the condensing means When recording is performed in a zone different from the zone in which the zone is located, the moving unit moves the light-collecting unit to the zone where recording is performed, and the relative speed determined by the determining unit is a reference speed for the zone where recording is performed. And recording means for recording data based on the recording clock generated by the generating means when the speed becomes close to.

An optical disk apparatus according to the present invention, in which data is recorded on an optical disk composed of a plurality of zones each including a plurality of tracks, includes a rotating means for rotating the optical disk at a different number of revolutions for each zone; A condensing means for condensing light on the optical disc; a moving means for moving light condensed on the optical disc by moving the condensing means in a radial direction of the optical disc to each zone; Determining means for determining the relative speed between the light condensed by the optical means and the optical disk; first generating means for generating a first recording clock having a frequency based on the relative speed determined by the determining means; A second generation unit for generating a second recording clock having a constant frequency, and a second recording clock in a zone different from a zone in which light condensed by the condensing unit is located. When performing recording, when the moving means moves the condensing means to a zone where recording is performed, and the relative speed determined by the determining means becomes a first speed close to a reference speed for the zone where recording is performed. A first recording means for recording data based on a first recording clock generated by the first generating means; and a determination made by the determining means when data is recorded by the first recording means. When the set relative speed becomes a second speed that is closer to the reference speed for the zone where recording is performed than the first speed, the data is generated based on the second recording clock generated by the second generating unit. And a first recording means for recording

An optical disk device according to the present invention has a track for recording spiral or concentric data, and has a fixed length comprising a header portion composed of address data assigned to a head portion and a recording area in which data is recorded. Recording data on an optical disc having a defect management area in which defective sectors are recorded in advance, comprising a plurality of zones each having a plurality of tracks, and a plurality of zones each including a plurality of tracks. Rotating means for rotating at different rotational speeds, condensing means for condensing light on the optical disc, and light condensing on the optical disc by moving the condensing means in the radial direction of the optical disc. Moving means for moving to each zone, reading means for reading the address data of the header portion, First determining means for determining whether or not address data of a header portion of a continuous sector is continuously read based on the address data; and address data read by the reading means. A second determining means for determining a transit time of the light in one sector and determining a relative speed between the light focused by the focusing means and the optical disc; and a second determining means for determining a relative speed between the optical disc and the optical disc. First generating means for generating a first recording clock having a frequency based on the relative speed; second generating means for generating a second recording clock having a constant frequency; and light collected by the light collecting means. When recording is performed in a zone different from the zone where is located, the moving means moves the condensing means to the zone in which recording is performed, and makes a decision by the second decision means. A first recording method for recording data based on a first recording clock generated by the first generating means when the relative speed obtained becomes a first speed close to a reference speed for a zone for recording; Means and when recorded by the first recording means,
When the relative speed determined by the second determining means becomes a second speed closer to the reference speed for the zone where recording is performed than the first speed, a second speed generated by the second generating means is set. Second recording means for recording data based on the second recording clock; and address data of a header portion of a continuous sector determined by the first determining means when data is recorded by the first recording means. When it is determined that the data is not continuously read, the first execution means for executing an error process and the first determination means when the data is recorded by the second recording means. If it is determined that the address data of the header portion of the sector to be read is not continuously read, it is checked whether or not this sector is a defective sector recorded in the defect management area. Second execution means for executing a slipping replacement process for skipping a defective sector and continuing to record data in the next sector, and performing a linear replacement replacement process for recording data in a replacement sector if the sector is not a defective sector; Consists of

An optical disk device according to the present invention has a groove and a land track for recording spiral or concentric data, and has a header section composed of a fixed length of groove and land and composed of address data given to a head portion. A device for recording data on an optical disc having a plurality of sectors each including a recording area where data is recorded, a plurality of zones each including a plurality of tracks, and a defect management area in which defective sectors are recorded in advance. A rotating means for rotating the optical disc at a different number of revolutions for each zone; a condensing means for condensing light on the optical disc; and moving the condensing means in a radial direction of the optical disc. Moving means for moving the light focused on the optical disk to each zone; Reading means for reading data, first determining means for determining, based on the address data read by the reading means, whether or not address data in a header portion of a continuous sector is continuously read, and said reading means. A second determining unit that determines a transit time of the light in two adjacent sectors of the optical disk based on the address data read by the optical disk, and determines a relative speed between the light collected by the light collecting unit and the optical disk. Determining means; first generating means for generating a first recording clock having a frequency based on the relative speed determined by the second determining means; and second generating means for generating a second recording clock having a constant frequency. Generating means, when performing recording in a zone different from the zone where the light condensed by the condensing means is located, the condensing means performs recording by the moving means. When the relative speed determined by the second determination unit reaches a first speed close to the reference speed for the zone where recording is performed, the first speed is generated by the first generation unit. A first recording unit for recording data based on the recording clock of (a), and when the data is recorded by the first recording unit,
When the relative speed determined by the second determining means becomes a second speed closer to the reference speed for the zone where recording is performed than the first speed, a second speed generated by the second generating means is set. Second recording means for recording data based on the second recording clock; and address data of a header portion of a continuous sector determined by the first determining means when data is recorded by the first recording means. When it is determined that the data is not continuously read, the first execution means for executing an error process and the first determination means when the data is recorded by the second recording means. If it is determined that the address data of the header portion of the sector to be read is not continuously read, it is checked whether or not this sector is a defective sector recorded in the defect management area. Second execution means for executing a slipping replacement process for skipping a defective sector and continuing to record data in the next sector, and performing a linear replacement replacement process for recording data in a replacement sector if the sector is not a defective sector; Consists of

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an optical disk device according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows an optical disk device. This optical disk device uses an optical disk (DVD-RA
M) Recording data on the optical disk 1 and reproducing data from the optical disk 1.

This optical disk device is configured as a device capable of reading data not only from a DVD-RAM but also from other DVD disks and CD disks, and writing data on a rewritable DVD disk. .

Therefore, the optical pickup 2 is a DVD
And an objective lens 4 for CD. In the optical pickup 2, a DVD objective lens 3 is provided.
DVD and CD corresponding to the objective lens 4 for DVD and CD
A semiconductor laser unit (not shown) is provided, and one of the semiconductor laser units is selected according to whether the loaded optical disk 1 is a DVD disk or a CD disk, and is energized by a laser control unit 5 to correspond to each other. A laser beam having a predetermined wavelength. When either the DVD or CD semiconductor laser unit is selected and energized, the laser beam corresponding to the optical disk 1 is directed to the corresponding objective lens 3, 4, and the objective lens 3, 4 causes the laser beam to be directed to the optical disk 1. Converges. Data is written to or reproduced from the optical disc 1 by the converged laser beam.

The setting of the laser control unit 5 is set by the DVD data processing unit 6. The setting includes a reproduction mode for obtaining a reproduction signal, a recording mode for recording data, an erasing mode for erasing data, and a DV mode.
The DVD mode for executing data processing on the D disk and the CD mode for executing data processing on the CD disk are different. That is, in the DVD mode, the DVD
The semiconductor laser unit for CD is selected and energized, and in the CD mode, the semiconductor laser unit for CD is selected and energized. The laser beam for DVD or CD has three modes: playback mode, recording mode, and erasing mode.
The semiconductor laser unit is energized by the laser control unit 5 based on a modulation signal from a modulation circuit 82 described later so that the two modes have different levels of power and generate a laser beam having a power corresponding to the mode. Is done.

The DVD disk or the CD is arranged so that the DVD disk 1 or the CD disk is arranged to face the DVD objective lens 3 and the CD objective lens 4.
The disk is transported into the apparatus by the tray 7 directly or stored in the disk cartridge 1a. A tray motor 8 for driving the tray 7 is provided in the apparatus. Also, the loaded DVD disk 1 or C
The D disk is rotatably held on a spindle motor 10 by a stamper 9.
Rotated by

The optical pickup 2 has a photodetector (not shown) for detecting a laser beam therein. This photodetector is reflected by the optical disc 1 and the objective lens 3,
4 to detect the laser beam returned. A detection signal (current signal) from the photodetector is converted into a voltage signal by a current / voltage converter (I / V) 12, and this signal is supplied to a reference amplifier (RF amplifier) 13 and a servo amplifier 14. . The reference amplifier 13 outputs to the DVD data processing unit 6 a tracking error signal for reproducing data in the header section 51 described later and an addition signal for reproducing data in the recording area 58. In the DVD mode, the servo signals (track error signal and focus signal) from the servo amplifier 14 are DV signals.
The signal is output to the D servo seek control unit 15, and is output to the CD servo seek control and CD data processing unit 16 in the CD mode.

As a method of optically detecting the amount of defocus, there is, for example, the following method.

[Astigmatism Method] An optical element (not shown) for generating astigmatism is arranged on a detection optical path of a laser beam reflected by the light reflecting film or the light reflective recording film of the optical disk 1, and light is detected. This is a method for detecting a change in the shape of laser light applied to the vessel. The light detection area is divided into four diagonally. For the detection signal obtained from each detection area, DVD
The difference between the diagonal sums is obtained in the servo seek control unit 15 to obtain a focus error detection signal (focus signal).

[Knife Edge Method] This is a method of arranging a knife edge that asymmetrically shields a part of the laser light reflected by the optical disk 1. The light detection area is divided into two parts, and a difference between detection signals obtained from each detection area is obtained to obtain a focus error detection signal.

Usually, either the astigmatism method or the knife edge method is employed.

The optical disk 1 has spiral or concentric tracks, and information is recorded on the tracks.
Information is reproduced or recorded / erased by tracing the converged spot along this track. In order to stably trace the focused spot along the track, it is necessary to optically detect the relative displacement between the track and the focused spot.

Generally, the following method is used as a track shift detecting method.

[Differential Phase Detec
Option) A change in the intensity distribution of the laser light reflected by the light reflecting film or the light reflecting recording film of the optical disk 201 on the photodetector is detected. The light detection area is divided into four on a diagonal line. For the detection signal obtained from each detection area, DV
The difference between the diagonal sums is obtained in the D servo seek control unit 15 to obtain a track error detection signal (tracking signal).

[Push-Pull Method] A change in the intensity distribution of the laser light reflected by the optical disk 1 on the photodetector is detected. The light detection area is divided into two parts, and a track error detection signal is obtained by taking the difference between the detection signals obtained from each detection area.

[Twin-Spot Method] A diffractive element or the like is arranged in a light transmission system between the semiconductor laser element and the optical disk 1 to divide the light into a plurality of wavefronts and to irradiate the optical disk 1 with ± first-order diffracted light. The change in reflected light amount is detected. A light detection area for individually detecting the reflected light amount of the + 1st-order diffracted light and the reflected light amount of the -1st-order diffracted light is arranged separately from the light detection area for detecting the reproduction signal, and a difference between the respective detection signals is calculated to obtain a track error detection signal. Get.

In the DVD mode, the focus signal, the tracking signal and the feed signal are sent from the DVD servo seek control unit 15 to the focus and tracking actuator driver and the feed motor driver 17,
The focus servo control and tracking servo control of the objective lenses 3 and 4 are performed by the driver 17.

Further, the driver 17 responds to the access signal.
Is supplied to the feed motor 11 to control the conveyance of the optical pickup 2.

The DVD servo seek control unit 15
Are controlled by the DVD data processing unit 6.
For example, an access signal is supplied from the DVD data processing unit 6 to the DVD servo seek control unit 15 to generate a feed signal.

The spindle motor driver 18 and the tray motor driver 19 are controlled by a control signal from the DVD data processing unit 6, the spindle motor 10 and the tray motor 8 are energized, and the spindle motor 10 is rotated at a predetermined speed. The tray motor 8 controls the tray appropriately.

A reproduction signal corresponding to the data of the header section 51 supplied to the DVD data processing unit 6 is supplied to a CPU 25 described later. Thereby, the CPU 25
Determines the sector number as an address of the header section 51 based on the reproduced signal, and compares it with the sector number as an address to access (record data or reproduce recorded data). I have.

The reproduction signal corresponding to the data in the recording area 58 supplied to the DVD data processing unit 6 is stored in the RAM 2
0 is stored in the DVD data processing unit 6, and the necessary data is stored in the DVD data processing unit 6.
SCSI interface control unit having M21 and C
The reproduction processing signal is supplied to the D-ROM decoder 22 and supplied to another device, for example, a personal computer via the SCSI.

In the CD mode, a focus signal from the CD servo seek control and the CD data processing unit 16
The tracking signal and the feed signal are sent to the focus and tracking actuator driver and the feed motor driver 17, and the driver 17 performs focus servo control of the objective lenses 3 and 4 and also performs tracking servo control.

Further, the driver 17 responds to the access signal.
Is supplied to the feed motor 11 to control the conveyance of the optical pickup 2. The spindle motor driver 18 and the tray motor driver 19 are controlled by a control signal from the CD servo seek control and the CD data processing unit 16.
Is controlled, the spindle motor 10 is energized, and the spindle motor 10 is rotated at a predetermined rotation speed.
The reproduction signal supplied to the CD data processing unit 16 is
The data is processed by the processing unit 16 and output via the CD data output amplifier 23.

Each unit shown in FIG. 1 is controlled by the CPU 25 in accordance with the procedure stored in the ROM 24. RA
M26 is used as a memory of the CPU 25.

The RAM 26 is provided with a defect data table 26a for storing defect data recorded in the defect management zone 6a of the optical disk 1. In the defect data table 26a, when the optical disk 1 is loaded into the optical disk device 10, the defect data recorded in the defect management zone 6a of the optical disk 1 is reproduced and stored.

Next, the structure of the DVD-RAM optical disk 1 created above will be described.

The optical disk 1 has a thickness of, for example, 0.6 m.
m, a disc-shaped substrate made of a transparent resin such as polycarbonate or acrylic, a phase-change recording film, a reflective film, a protective film, and a sheet or adhesive for bonding. Grooves and header information are recorded in an irregular shape on a transparent substrate, a recording film or the like is formed on the irregular surface, and then the irregular surfaces are adhered to each other so that recording and reproduction can be performed on both surfaces.

As shown in FIGS. 2 and 3, the optical disk 1 is composed of a header section 51 composed of a pre-pit (emboss pit) row indicating a wobbled groove for tracking and a track address in advance.

That is, the tracking groove is wobbled at a constant period in order to obtain a reference signal for data recording. At this time, the phase of the signal for wobbling the header section 51 and the tracking groove at a constant period is made to substantially match.

The header portion 51 first wobbles outward, then wobbles inward, and wobbles of a tracking groove also wobbles outward, and then wobbles inward.

As shown in FIGS. 4 and 5, the optical disc 1 includes, in order from the inside, a rewritable data zone 46 of the emboss data zone 45 of the lead-in area 42, zones 43a,. The read-out area 44 includes data zones, and the number of revolutions of the optical disc 1 (the standard speed for each zone) and the number of sectors for each track are different for each zone.

The lead-in area 42 has a plurality (189
6) An emboss data zone 45 composed of tracks and a rewritable data zone 46 composed of a plurality of tracks. The emboss data zone 45 includes a blank zone, a reference signal zone, a blank zone, a control data zone, and a blank zone. In the emboss data zone 45, reference signals and control data are recorded at the time of manufacturing. The rewritable data zone 46 includes a guard track zone, a disk test zone, a drive test zone, a disk identification data zone, and a defect management zone (PDL) 6a as a defect management area. I have.

In the defect management zone 6a, defect data including the physical sector number of the defective sector (corresponding to the physical sector address recorded in the address part PID of the header area) is recorded.

The data area 43 has a plurality (1) in the radial direction.
888), for example, 24 zones 43a,... 43x. However, only the zone 43a has 1888 tracks including the rewritable data zone 46.

The lead-out area 44 includes a plurality (144
6) The track is a rewritable data zone similar to the rewritable data zone 46, and can record the same contents as the data zone 46.

.. 43 of the data area 43
In x, the number of rotations (speed 39.78 to 16.91H
z) becomes slow, and the number of sectors per track (17 to 4)
0) increases.

The zones 43a of the data area 43,...
As shown in FIGS. 4 and 5, the 43x track has an ECC (error correction cod) as a data recording unit.
e) Block data unit (for example, 38688 bytes)
Each time, data is recorded.

The ECC block is composed of 16 sectors in which 2 Kbytes of data are recorded. For each sector, two 4-byte (32-bit) sector IDs (identification data) 1 to ID16 as address data are 2 bytes. A horizontal ECC (error) is added to main data (sector data) together with an error detection code (IED: ID error detection code) of the configuration and serves as an error correction code for reproducing data recorded in an ECC block.
correction code) 1 and ECC2 in the vertical direction are recorded. These ECCs 1 and 2 are
The error correction code is added to the data as a redundant word in order to prevent the data from being unable to be reproduced due to the defect of the data.

Each sector is composed of 172 bytes and 12 rows of data. Each row (line) is provided with a 10-byte horizontal ECC1 and 18 rows.
A vertical ECC2 for one row of a 2-byte configuration is provided. Thus, the error correction circuit 92 described later performs error correction processing for each line using the horizontal ECC 1 and performs error correction processing for each column using the vertical ECC 2. .

When the ECC block is recorded on the optical disc 1, byte synchronization is performed when data is reproduced every predetermined data amount of each sector (each predetermined data length interval, for example, 91 bytes: 1456 channel bits). Synchronization code to take (2 bytes: 32 channel bits)
Is given.

Each sector is composed of 26 frames from the 0th frame to the 25th frame, and a synchronization code (frame synchronization signal) given to each frame is:
A specific code (1 byte:
16 bits) and a common code (1 byte: 16 channel bits) common to each frame.

The zones 43a of the data area 43,...
As shown in FIGS. 4 and 5, a header section 51,..., In which a sector number or the like as an address is recorded for each sector, is pre-formatted on the 43x track.

The header section 51 is formed when the groove is formed. This header section 51
Is composed of a plurality of header areas 52 composed of a plurality of pits, as shown in FIGS.
3 is preformatted as shown in the figure, and the center of the pit is located on the same line as the center of the amplitude of the boundary line between the groove 53 and the land 54. FIG. 6 shows a header section 51 added to the first sector of each track, and FIG. 7 shows a header section 51 added to a sector in the middle of each track.

In this case, the headers for the grooves and the headers for the lands are formed alternately (in a staggered manner).

The format for each sector is shown in FIG.
Is shown in

In FIG. 8, one sector is composed of 2697 bytes (bytes), a 128-byte header area (corresponding to the header section 51) 51, a 2-byte mirror area 57,
It is composed of a recording area 58 of 2567 bytes.

The channel bits recorded in the sector have a format in which 8-bit data is modulated into 16-bit channel bits by 8-16 code.

The header area 51 is an area where predetermined data is recorded when the optical disc 1 is manufactured. The header area 51 includes four header 1 areas, two header areas, three header areas, and four header areas.

The header 1 area to the header 4 area are composed of 46 bytes or 18 bytes, and a synchronization code part VFO (Variable Frequency O) of 36 bytes or 8 bytes.
scillator), 3-byte address mark AM (Addres
s Mark), 4-byte address part PID (Position Ide)
ntifier), 2-byte error detection code IED (ID Err
or Detection Code) 1 byte postamble PA
(Postambles).

The header 1 area and the header 3 area have a 36-byte synchronization code section VFO1, and the header area 2 and the header 4 area have an 8-byte synchronization code section VFO2.

The synchronization code portions VFO1 and VFO2 are areas for pulling in the PLL, and the synchronization code portion VFO1 converts the continuation of “00010001.
6 "bytes (576 bits of channel bits) are recorded (patterns at constant intervals are recorded), and the synchronization code portion VFO2 is" 00010001 "in channel bits.
.. Are recorded for "8" bytes (128 bits of channel bits). The synchronous code portion VFO1 has a so-called 4T continuous pattern.

The address mark AM is a "3" byte synchronization code indicating where the sector address starts. The pattern of each byte of this address mark AM is “0001000100000000000000000
01000100000000000000010001 "
A special pattern that does not appear in the data portion is used.

The address sections PID1 to PID4 are areas in which sector numbers are recorded as 4-byte addresses. The sector number is a physical sector number as a physical address indicating a physical position on a track of the optical disc 1. Since this physical sector number is recorded in a mastering process, it cannot be rewritten.

The address part PID (1-4) is composed of 1-byte (8-bit) sector information and 3-byte sector number (physical sector number as a physical address indicating a physical position on a track). Have been. The sector information includes a 2-bit reserved area and a 2-bit physical I
It is composed of a D number area, a 3-bit sector type area, and a 1-bit layer number area.

The physical ID number is, for example, “1” in the case of PID1, and is a number indicating the number of the overwriting four times in one header section 51.

In the sector type area, codes indicating the first sector, the last sector, and the like in the track are recorded.

The error detection code IED is an error (error) detection code for a sector address (including an ID number).
It is possible to detect the presence or absence of an error in the read PID.

The postamble PA includes state information necessary for demodulation, and also has a role of adjusting the polarity so that the header section 51 ends with a space.

The mirror area 57 is used for offset correction of a tracking error signal, timing generation of a land / groove switching signal, and the like.

The recording area 58 includes a gap area of 10 to 11 bytes, a guard 1 area of 20 to 27 bytes, and a V of 35 bytes.
FO3 area, 3-byte pre-synchronous code (P
S) area, data area of 2418 bytes, postamble 3 (PA3) area of 1 byte, guard 2 area of 48 to 55 bytes, and buffer area of 24 to 25 bytes.

The gap area is an area where nothing is written.

The guard 1 area is an area provided in order to prevent the terminal deterioration at the time of repetitive recording peculiar to the phase change recording medium from reaching the VFO3 area.

The VFO3 area is also an area for PLL lock.
The sequence of “10001000...
5 "bytes (560 bits of channel bits) are recorded.

The PS (pre-synchronous code) area is a tuning area for connecting to a data area.

The data area includes a data ID and a data ID error detection code IED (Data ID Error Detection Code).
e), synchronization code, ECC (Error Correction Code)
), An EDC (Error Detection Code), user data, and the like. The data ID is 4-byte (32 channel bits) sector data of each sector. The data ID error detection code IED is a two-byte (16-bit) error detection code for data ID.

The PA (postamble) 3 area contains state information necessary for demodulation, and indicates the end of the last byte of the previous data area.

The guard 2 area is an area provided to prevent the end deterioration at the time of repetitive recording peculiar to the phase change recording medium from reaching the data area.

The buffer area is an area provided for absorbing rotation fluctuations of the motor for rotating the optical disk 1 so that the data area does not cover the next header section 51.

The reason why the gap area is expressed as 10 + J / 16 bytes is that a random shift is performed. The random shift is to shift the data write start position in order to reduce the repetitive recording deterioration of the phase change recording medium. The length of the random shift is adjusted by the length of the buffer area located at the end of the data area, and the entire length of one sector is fixed at 2697 bytes.

The zones 43a of the data area 43,...
As described above, spare sectors are prepared in the 43x, and are used as final spares when a sector-based slip replacement process (slipping replacement algorithm) is performed in the same zone. .

Next, as shown in FIGS. 1 and 9, a demodulation section 61 for demodulating data in the recording area 58 and demodulating data in the header section 51 is provided in the DVD data processing unit 6. ing.

The demodulation section 61 has a waveform equalizing circuit 7 for equalizing the waveform of the addition signal (RF sum signal) from the RF amplifier 13.
1. The tracking error signal (R
Waveform equalizer 72 for equalizing the waveform of the F difference signal), a header detector 73 for detecting the header 51 based on the waveform-reproduced RF signal from the waveform equalizer 72, and a header detector A switch 74 for switching and outputting a reproduced RF signal whose waveform has been equalized from the waveform equalizing circuit 71 or a reproduced RF signal whose waveform has been equalized from the waveform equalizing circuit 72 based on the detection signal from the switch 73; A binarizing circuit 75 for binarizing a reproduced RF sum signal equalized in waveform by a waveform equalizing circuit 71 supplied via a signal 74 or a reproduced RF difference signal equalized in waveform from a waveform equalizing circuit 72;
A detection signal from the header detection circuit 73 or the CPU 2
5, a PLL circuit 76 that generates a PLL clock synchronized with the signal from the binarization circuit 75 based on the control signal from the binarization circuit 75. The binary signal from the binarization circuit 75 is generated by using the PLL clock from the PLL circuit 76. A demodulation circuit 77 detects a synchronization signal from the digitized signal and performs data separation, 8-16 demodulation, or demodulation of the binarized signal for the header section 51.

The header detecting circuit 73 is constituted by a filter comprising a comparator or the like and a mono-multi vibrator, or by detecting an edge from the buffer area (gap) by the header 51. The detection signal from the header detection circuit 73 is output to the changeover switch 74 as a changeover signal,
The signal is supplied to the PLL circuit 74 as a VFO start signal.

With this configuration, when the detection signal from the header detection circuit 73 is at a low level, the changeover switch 7
4 is switched to the waveform equalizing circuit 71, and the reproduced RF sum signal whose waveform is equalized by the waveform equalizing circuit 71 from the RF sum signal from the RF
It is guided to the value conversion circuit 75. As a result, the reproduced RF sum signal is binarized by the binarization circuit 75 to obtain an 8-16 signal, and the binary signal is output from the binarization circuit 75 using the PLL clock from the PLL circuit 76 synchronized with the 8-16 signal. 8-16
The synchronization signal is detected from the signal, the data is separated, and the demodulation circuit 7
7 to perform 8-16 demodulation.
8 is output.

When the detection signal from the header detection circuit 73 is at a high level, the changeover switch 74 is switched to the waveform equalization circuit 72, and the RF difference signal from the RF amplifier 13 is converted by the waveform equalization circuit 72. Reproduced RF with waveform equalization
The difference signal is guided to a binarization circuit 75 via a changeover switch 74. As a result, the reproduced RF difference signal from the RF amplifier 13 is output from the PLL circuit 76 synchronized with the binarized data.
Binarization circuit 75 using LL clock (reproduction clock)
Is demodulated by the demodulation circuit 77 to provide the CPU 25 with an address portion PID of the header portion 51.
Is output.

When the address parts PID1 to PID4 are read based on the header signal demodulated by the demodulation circuit 77, the address detection output from the CPU 25 based on the detection signals of the address parts PID1 to PID4 for the header part 51. The signal will be described with reference to FIGS.

That is, at least the address portion PID1
Based on one of the detections (1) to (4), an address detection signal is output at a predetermined timing (the same timing). For example, as shown in FIG. 10B, based on the detection signal of the address portion PID1, an address detection signal is output after a lapse of time T1 from the rise of this detection signal, and as shown in FIG. , Address part PID
2, an address detection signal is output after a lapse of time T2 from the rise of the detection signal, and as shown in FIG. 10D, based on the detection signal of the address portion PID3, the address detection signal is output. An address detection signal is output after a lapse of time T3 from the rise, and an address detection signal is output after a lapse of time T4 from the rise of the detection signal based on the detection signal of the address portion PID4, as shown in FIG. You.

As a result, as shown in FIGS. 15A and 15B, the address detection signal for each header 51 is always output at a constant timing.

Next, as shown in FIGS. 1 and 11, a modulation section 62 for modulating recording data is provided in the DVD data processing unit 6.

As shown in FIG. 11, the modulating section 62
A recording clock generator 81 for generating a recording clock based on the linear velocity (the relative speed between the laser beam condensed by the optical pickup 2 and the optical disk 1); and a recording clock from the recording clock generator 81. And a modulation circuit 82 for outputting a modulation signal obtained by modulating recording data supplied from an external device (not shown) via the decoder 22 to the laser control unit 5.

As shown in FIG. 12, the recording clock generating section 81 includes a frequency dividing value generating section 91 as a linear velocity detecting section, a switching circuit 92, frequency dividers 93 and 94, and a PLL circuit 95.

The frequency dividing value generating section 91 generates a frequency dividing value based on the current linear velocity based on the address detection signal supplied from the CPU 25 and a reference clock from an oscillator (not shown). The peripheral value is determined by the switching circuit 92 and C
Output to PU25. The frequency dividing value generation unit 91 detects the linear velocity (moving speed) of the laser beam on the optical disk 1 by utilizing the fact that the passing time of the laser beam between the header portions changes when the rotation of the optical disk 1 is changed. Things.

The switching circuit 92 is based on a switching signal supplied from the CPU 25 and based on a reference frequency division value set in advance in a memory (not shown) or a current linear velocity from the frequency division value generating section 91. Divide value by frequency divider 93
Is output to

That is, the frequency dividing value based on the current linear velocity from the frequency dividing value generating section 91 is supplied to the frequency divider 93 by the switching signal supplied when the rough detection is determined by the CPU 25 and the recording is started. The reference dividing value is output to the frequency divider 93 by a switching signal that is output and supplied when the CPU 25 determines that high-precision detection is performed.

The frequency divider 93 outputs, to the PLL circuit 95, a frequency-divided signal obtained by dividing (1 / N) the reference clock from an oscillator (not shown) by the frequency division value supplied from the switching circuit 92.

The frequency divider 94 outputs to the PLL circuit 95 a frequency-divided signal obtained by dividing the recording clock from the PLL circuit 95 by the frequency division value (M) (1 / M).

The PLL circuit 95 has a frequency (f) based on the frequency-divided signal from the frequency divider 93 and the frequency-divided signal from the frequency divider 94.
= M / N) to the modulation circuit 82.

As shown in FIG. 12, the frequency dividing value generating section 91 includes a counter 96, a register 97, and a calculating section 98.

As shown in FIGS. 15A to 15C, the counter 96 is reset by the address detection signal for each header 51 supplied from the CPU 25, and the address detection signal and the address for each header 51 are reset. This counter counts a reference clock from an oscillator (not shown) between the detection signal and the reference clock, and counts a reference clock corresponding to the passage time of the header section 51 of two adjacent sectors. Is output to the operation unit 98.

The register 97 stores the count result from the counter 96 based on the address detection signal, and thereby stores the header 51 of the two adjacent sectors immediately before the two adjacent sectors targeted by the counter 96. To store the number of clocks corresponding to the transit time of
This stored content is output to the operation unit 98.

Based on the address detection signal, the operation section 98 calculates the number of clocks (N ″) corresponding to the passing time of the header section 51 of the immediately preceding two adjacent sectors supplied from the register 97 and the counter 96. A value obtained by adding the supplied clock number (N ') corresponding to the passing time of the header section 51 of two adjacent sectors and dividing by 2, that is, a frequency division value based on the current linear velocity is calculated. The frequency division value is output to the switching circuit 92 and the CPU 25.

That is, the value calculated by the calculating section 98 is the relative speed, that is, the linear speed, in the predetermined sector, and the passing time of the laser beam in the sector immediately before and two sectors before the predetermined sector. Is estimated by the average value of.

In the above example, the relative speed in a predetermined sector is estimated by the average value of two sectors before this sector, but may be estimated by the average value of a plurality of continuous sectors.

Further, the relative speed in a predetermined sector calculated by the calculating section 98 is 2 relative to this sector.
It may be predicted from a speed change in one sector.

For example, as shown in FIG. 16, the speed in a predetermined sector C is the measured speed V1 in the sector A from the header A to the header B, and the speed measured in the sector B from the header B to the header C. The predicted speed VA2 obtained by adding the actually measured speed V1 to the speed change from the speed V2 is predicted as the speed V3 in the sector C from the header section C to the header section D.

In this case, the speed can be predicted without considering acceleration and deceleration.

The CPU 25 determines the linear velocity based on the frequency division value supplied from the calculating section 98, and determines the linear velocity by ± 10 from the reference linear velocity.
When the linear velocity falls within the range of%, rough detection is determined, and a recording clock (first recording clock) from the PLL circuit 95 having a frequency (f) in consideration of the difference in the linear velocity (FIG. 15D)
Data modulation is performed on the basis of the frequency division value supplied from the operation unit 98. When the linear velocity is within ± 1% of the reference linear velocity, It is determined that high-precision detection is performed, and modulates data based on a reference recording clock (second recording clock) from the PLL circuit 95. When the rough detection is determined and when high-precision detection is determined. The switching circuit 92 is switched by outputting different switching signals.

Next, in the above configuration, when data recording is instructed in another zone (the rotation speed is increased and accelerated) inside the currently accessed zone on the optical disc 1. Will be described with reference to the flowcharts shown in FIGS.

For example, in the state where the laser beam from the optical pickup 2 is tracking a track in a predetermined zone, access to a track in another zone is restricted to CP.
When determined by U25 (ST1), the CPU 25
The VD servo seek control unit 15 is controlled, and the optical pickup 2 is moved by the driver 17 (ST2).

The spindle motor driver 18 is controlled by a control signal from the DVD data processing unit 6,
The spindle motor 10 is energized and the spindle motor 1
Zero is controlled to rotate at a predetermined rotation speed corresponding to the destination zone (ST3).

The optical pickup 2 is moved to the access position, and the focus lens, the tracking signal and the feed signal from the DVD servo seek control unit 15 are used to control the focus of the objective lenses 3 and 4 by the driver 17, and the tracking servo is performed. Controlled.

When the servo is turned on and before the rotation by the spindle motor 10 is established, the reproduction RF as a tracking error signal from the RF amplifier 15 is output.
When the header detection circuit 73 detects the header 51 based on the difference signal, the changeover switch 74 switches the waveform equivalent circuit 7.
2 and the VFO start signal is output to the PLL circuit 76 as a header detection signal.

Thus, when the header detection signal is supplied from the header detection circuit 73, the PLL circuit 76 generates a reproduction clock synchronized with the binarization signal from the binarization circuit 75 and demodulates it. The signal is output to the circuit 77.

As a result, the demodulation circuit 77 becomes the PLL circuit 76
From the binarization circuit 75 based on the reproduced clock from
By demodulating the digitized data, the reproduced data of the header section 51 is output to the CPU 25.

As a result, the CPU 25 detects at least one of the address parts PID1 to PID4 based on the reproduction data for each header part 51 of each sector from the demodulation circuit 77, as shown in FIGS. Thus, the address detection signal is output at a predetermined timing. This address detection signal is supplied to the counter 96, the register 97, and the calculation unit 98 in the frequency division value generation unit 91 (ST4).

As a result, the counter 96 counts the reference clock from the oscillator (not shown) between the supplied address detection signals, as shown in FIG. The reference clock corresponding to the passing time is counted, and the counting result is output to the register 97 and the arithmetic unit 98.

The register 97 stores the count result from the counter 96 on the basis of the address detection signal, so that the header of the two adjacent sectors immediately before the two adjacent sectors targeted by the counter 96 is stored. Part 5
The number of clocks corresponding to the passing time of 1 is stored, and the stored content is output to the arithmetic unit 98.

As a result, based on the address detection signal, the operation section 98 supplies the clock corresponding to the transit time (by the laser beam) between the header sections 51 of the immediately preceding two adjacent sectors supplied from the register 97. The value obtained by adding the number (N ″) and the number of clocks (N ′) corresponding to the transit time between the header sections 51 of two adjacent sectors supplied from the counter 96 and dividing by 2, that is, the current linear velocity , And calculates the frequency division value based on the switching circuit 92 and the CPU.
25.

Accordingly, the CPU 25 determines the linear velocity based on the frequency division value supplied from the calculating section 98, and when the linear velocity is within ± 10% of the reference linear velocity (see FIGS. 13 and 14). It is determined that rough detection has been performed, and a switching signal corresponding to this is output to the switching circuit 92 (ST5).

As a result, the frequency division value based on the current linear velocity from the calculation section 98 is output to the frequency divider 93, so that P
From the LL circuit 95, a recording clock having a frequency in consideration of the difference between the current linear velocity and the reference linear velocity (first recording clock, recording clock having a frequency corresponding to the current linear velocity) (see FIG. 15D) ) Is output to the modulation circuit 82 (ST6).
(Recording clock = (current passage time of one sector / passage time of regular one sector) × reference clock) Modulation circuit 8
Reference numeral 2 denotes an external device (not shown) based on the first recording clock from the PLL circuit 95 of the recording clock generator 81.
And outputs a modulated signal obtained by modulating the recording data supplied through the decoder 22 to the laser control unit 5 (ST7).

When the semiconductor laser unit for DVD is energized by the laser control unit 5, a laser beam is generated. Data is written on the optical disk 1 by this laser beam (ST8).

Thereafter, recording is performed based on the first recording clock (ST4 to ST8).

During the above rough detection, the CPU 2
5 determines an address error (ST9), the CPU
In the step 25, the recording operation is stopped and error processing is performed irrespective of the defect data stored in the defect data table 26a (ST10).

As described above, the recording clock from the PLL circuit 95 of the recording clock generation unit 81 is changed from a regular frequency to a frequency (based on the current linear velocity) when rough detection is performed, as shown in FIG. The frequency is changed to 10% smaller than the normal frequency), and then gradually approaches the normal frequency.

The CPU 25 determines the linear velocity based on the frequency division value supplied from the calculating section 98,
When the linear velocity is within 1% (see FIGS. 13 and 14), it is determined that high-precision detection has been performed, and a corresponding switching signal is output to the switching circuit 92 (ST11).

As a result, the reference frequency division value set in the memory (not shown) is output to the frequency divider 93, and the reference recording clock (second recording clock) is output from the PLL circuit 95 to the modulation circuit 82. (ST1
2).

The modulation circuit 82 includes a recording clock generation unit 81
A modulated signal obtained by modulating the recording data supplied from an external device (not shown) via the decoder 22 based on the second recording clock from the PLL circuit 95 is output to the laser control unit 5 (ST13).

When the semiconductor laser unit for DVD is energized by the laser control unit 5, a laser beam is generated. Data is written on the optical disc 1 by this laser beam (ST14).

Thereafter, recording in sector units is performed based on the second recording clock (ST13, 14, 1).
5).

During the high-precision detection, the CPU
When 25 determines an address error (ST16), C
When the address at which the error has occurred is stored in the defect data table 26a (ST17), the PU 25 skips the defective sector by the replacement process by slipping and continues the recording process (ST18). If it is not stored in the table 26a (ST17), the recording process to the replacement sector is performed by the replacement process by the linear replacement (ST1).
9).

In the above example, the process was performed when data recording was instructed in another zone (the number of rotations becomes faster) inside the currently accessed zone on the optical disk 1. Processing when data recording is instructed in another zone outside (the number of rotations becomes slower) outside the currently accessed zone above can be performed in the same manner as described above. However, in this case, the recording clock from the PLL circuit 95 of the recording clock generation unit 81 changes from a regular frequency to a frequency based on the current linear velocity (regular frequency) when rough detection is performed, as shown in FIG. (10% larger frequency), and then gradually approach the regular frequency.

As described above, when accessing a different zone where the number of rotations of the optical disc is different during data recording, when the linear velocity is within ± 10% of the standard linear velocity, A recording clock based on a difference in linear velocity is generated, and data recording is started based on the generated recording clock.

Thus, data recording can be started before the standard linear velocity is reached, that is, before rotation in a predetermined zone is stabilized, and recording can be performed efficiently.

Further, when accessing a different zone having a different rotation speed of the optical disc during data recording, rough detection is determined when the linear speed is within ± 10% of the standard linear speed. Then, a recording clock is generated based on the difference between the linear velocities, data recording is started based on the generated recording clock, and when the linear velocity falls within ± 1% of the standard linear velocity, Judge as accuracy detection, record data based on a fixed reference clock recording clock, execute error processing when an error occurs in reading header address data during recording during rough detection. When an error occurs in reading the address data in the header during recording during high-precision detection, the PDL
In the case of a sector registered in the PDL, a replacement process by slipping to skip this sector and continue data recording is performed, and in the case of a sector not registered in the PDL, data is recorded in a substitute sector of this sector. The replacement process is performed by a linear replacement.

As a result, if an address data reading error occurs during recording during rough detection, the data cannot be accurately recorded because the recording clock is largely changed, and the error occurs. When an address data reading error occurs during recording during high-precision detection by performing processing, data can be accurately recorded because the recording clock does not change, so that recording can be continued by replacement processing.

That is, the number of rotations (linear speed) of the optical disk relative to the original number of rotations is detected, and whether the optical disk is accelerating or decelerating is detected, and recording is performed using a recording clock corresponding to the detection. If the address cannot be read, it is determined whether or not to continue recording according to the state at that time, and recording is performed efficiently.

Thus, the recording is started before the rotation speed of the optical disk reaches the normal rotation speed, and when an address error occurs during the recording, data is not written with an incorrect clock.

[0144]

As described above in detail, according to the present invention, when data is recorded on an optical disk composed of a plurality of zones each including a plurality of tracks, and when access is made across zones, Since the recording can be started before the rotation speed is stabilized, it is possible to provide an optical disk device capable of performing recording efficiently and preventing data from being recorded with an incorrect clock.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of an optical disk device according to an embodiment of the present invention.

FIG. 2 is a plan view showing a schematic configuration of an optical disc.

FIG. 3 is a diagram showing a wobble situation of a header portion and a groove portion of the optical disc.

FIG. 4 is a plan view showing a schematic configuration of an optical disc.

FIG. 5 is a plan view showing a schematic configuration of an optical disc.

FIG. 6 is a view for explaining the state of preformat data in a header portion of an optical disc, and surrounding grooves and lands.

FIG. 7 is a view for explaining the state of preformat data in a header portion of an optical disc and peripheral grooves and lands.

FIG. 8 is a diagram showing a sector format for each sector.

FIG. 9 is a block diagram showing a schematic configuration of a demodulation unit of the DVD data processing unit.

FIG. 10 is a timing chart for explaining an output timing of an address detection signal in a header section.

FIG. 11 is a block diagram showing a schematic configuration of a modulation unit of the DVD data processing unit.

FIG. 12 is a circuit diagram showing a schematic configuration of a recording clock generation circuit.

FIG. 13 is a signal waveform diagram for explaining rough detection and high-accuracy detection based on a linear velocity.

FIG. 14 is a signal waveform diagram for explaining a recording clock based on a linear velocity.

FIG. 15 is a diagram for explaining an operation of a main part in the recording clock generation circuit.

FIG. 16 is a view for explaining speed prediction processing in a predetermined sector.

FIG. 17 is a flowchart for explaining processing during data recording.

FIG. 18 is a flowchart for explaining processing during data recording.

FIG. 19 is a signal waveform diagram for explaining a recording clock based on a linear velocity.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Optical disk 2 ... Optical pick-up (condensing means) 3 ... Objective lens 6 ... DVD data processing unit 10 ... Spindle motor (rotating means) 11 ... Feeding motor (moving means) 13 ... RF amplifier 14 ... Servo amplifier 15 ... DVD servo seek control unit 17 ... Driver 25 ... CPU 61 ... Demodulation unit 62 ... Modulation unit 81 ... Recording clock generation unit 82 ... Modulation circuit

Continued on the front page F term (reference) 5D044 BC04 CC05 CC06 GL23 GM16 5D090 AA01 CC01 CC18 DD03 DD05 EE01 FF27 FF38 GG02 GG03 HH01 LL08

Claims (15)

[Claims] 1. An optical disk apparatus for recording data on an optical disk comprising a plurality of zones each having a plurality of tracks, a rotating means for rotating the optical disk at a different rotation speed for each zone, and an optical disk on the optical disk. Focusing means for focusing the light; moving means for moving the focusing means in the radial direction of the optical disc to move the light focused on the optical disc to each zone; Determining means for determining a relative speed between the emitted light and the optical disk; generating means for generating a recording clock having a frequency based on the relative speed determined by the determining means; and light collected by the light collecting means When recording is performed in a zone different from the zone where is located, the moving unit moves the light-collecting unit to the zone where recording is performed, and Recording means for recording data based on a recording clock generated by the generating means when the relative speed determined by the means becomes a speed close to a reference speed for a zone where recording is performed. Optical disk device. 2. An optical disk apparatus for recording data on an optical disk comprising a plurality of zones each having a plurality of tracks, a rotating means for rotating the optical disk at a different rotational speed for each zone, and an optical disk on the optical disk. Focusing means for focusing the light; moving means for moving the focusing means in the radial direction of the optical disc to move the light focused on the optical disc to each zone; Determining means for determining a relative speed between the emitted light and the optical disk; generating means for generating a recording clock having a frequency based on the relative speed determined by the determining means; and light collected by the light collecting means When recording is performed in a zone different from the zone where is located, the moving unit moves the light-collecting unit to the zone where recording is performed, and A modulating means for modulating data to be recorded based on a recording clock generated by the generating means when the relative speed determined by the means becomes a speed close to a reference speed for a zone for recording; An optical disc device comprising: a recording unit that records data on the optical disc by changing light condensed by the condensing unit based on the modulated data. 3. An optical disk apparatus for recording data on an optical disk comprising a plurality of zones each having a plurality of tracks and rotating the optical disk at a different number of revolutions for each zone, wherein light is written on the optical disk. Condensing means for condensing light; moving means for moving the light condensing means in the radial direction of the optical disc to move light condensed on the optical disc to each zone; condensing light by the condensing means Determining means for determining a relative speed between the light to be emitted and the optical disk; generating means for generating a recording clock having a frequency based on the relative speed determined by the determining means; and light collected by the light collecting means. When performing recording in a zone different from the zone in which the light source is located, the moving means moves the condensing means to a zone in which recording is performed, and the determining means Recording means for recording data based on a recording clock generated by the generating means, when the relative speed determined from the speed becomes closer to the reference speed for the zone for recording. Optical disk device. 4. An optical disk device for recording data on an optical disk comprising a plurality of zones each having a plurality of tracks and rotating the optical disk at a different number of revolutions for each zone, wherein light is emitted onto the optical disk. Condensing means for condensing light; moving means for moving the light condensing means in the radial direction of the optical disc to move light condensed on the optical disc to each zone; condensing light by the condensing means Determining means for determining a relative speed between the light to be emitted and the optical disk; generating means for generating a recording clock having a frequency based on the relative speed determined by the determining means; and light collected by the light collecting means. When performing recording in a zone different from the zone in which the light source is located, the moving means moves the condensing means to a zone in which recording is performed, and the determining means A modulating unit for modulating data to be recorded based on a recording clock generated by the generating unit when the relative speed determined by the above becomes a speed close to a reference speed for a zone in which recording is performed; Recording means for recording data on the optical disk by changing light condensed by the light condensing means based on the obtained data. 5. A track having grooves and lands for recording spiral or concentric data, and a header portion and data comprising address data provided at the head portion, comprising grooves and lands of a fixed length, are recorded. An optical disc apparatus having a plurality of sectors each including a recording area and recording data on an optical disc including a plurality of zones each including a plurality of tracks, wherein the optical disc rotates at a different number of revolutions for each zone. Means for condensing light on the optical disc; and moving means for moving the light condensed on the optical disc to each zone by moving the condensing means in a radial direction of the optical disc. And the relative speed between the light condensed by the light condensing means and the optical disk, and Determining means for determining based on the transit time of the light in the data, generating means for generating a recording clock having a frequency based on the relative speed determined by the determining means; When performing recording in a zone different from the zone in which the recording is performed, the moving unit moves the light-collecting unit to the recording zone, and the relative speed determined by the determining unit is close to the reference speed for the recording zone. Recording means for recording data based on the recording clock generated by the generating means when the above condition is satisfied. 6. A light transit time in said sector by said judging means is a time every time an address detection signal generated by reading an address of a header portion of each sector is output. The optical disk device according to claim 5. 7. The relative speed in a predetermined sector determined by the determining means is estimated by an average value of the light transit times in the sector immediately before and two sectors before the sector. The optical disk device according to claim 5, wherein: 8. The method according to claim 1, wherein the relative speed in the predetermined sector determined by the determining unit is estimated by an average value of the light transit times in a plurality of continuous sectors before the sector. The optical disk device according to claim 5, wherein 9. A relative speed in a predetermined sector determined by the determining means is a transit time of the light in a sector immediately before the sector and a transit time of the light in a sector immediately before the sector. 6. The optical disk device according to claim 5, wherein the optical disk device is predicted based on an acceleration obtained from the optical disk. 10. An optical disk apparatus for recording data on an optical disk comprising a plurality of zones each having a plurality of tracks, a rotating means for rotating the optical disk at a different number of revolutions for each zone, and an optical disk on the optical disk. Focusing means for focusing the light; moving means for moving the focusing means in the radial direction of the optical disc to move the light focused on the optical disc to each zone; Determining means for determining the relative speed between the light to be emitted and the optical disk; first generating means for generating a first recording clock having a frequency based on the relative speed determined by the determining means; A second generation unit for generating a second recording clock, and performing recording in a zone different from a zone in which light condensed by the condensing unit is located. In this case, when the condensing unit is moved to the zone where recording is performed by the moving unit and the relative speed determined by the determining unit becomes a first speed close to a reference speed for the zone where recording is performed, A first recording unit that records data based on a first recording clock generated by the first generation unit; and a relative unit that is determined by the determination unit when the data is recorded by the first recording unit. When the speed reaches a second speed that is closer to the reference speed for the zone in which recording is performed than the first speed, data is recorded based on a second recording clock generated by the second generation unit. An optical disk device comprising: a first recording unit; 11. The method according to claim 1, wherein the first speed is a speed within ± 10% of the reference speed, and the second speed is a speed within ± 1% of the reference speed. Item 11. An optical disk device according to item 10. 12. A plurality of sectors each having a track for recording spiral or concentric data, and a plurality of sectors each having a fixed length including a header portion composed of address data assigned to a head portion and a recording area in which data is recorded. An optical disc apparatus for recording data on an optical disc having a defect management area in which a plurality of zones each having a plurality of tracks and a defective sector is recorded in advance, wherein the optical disc has a different rotation speed for each zone. Rotating means for rotating the optical disc, condensing means for condensing light on the optical disc, and light condensing on the optical disc by moving the condensing means in the radial direction of the optical disc to each zone. Moving means for moving; reading means for reading the address data of the header portion; address data read by the reading means; By another,
First determining means for determining whether or not address data of a header portion of continuous sectors is continuously read; and address data read by the reading means.
Second determining means for determining a transit time of the light in two adjacent sectors of the optical disc and determining a relative speed between the light condensed by the condensing means and the optical disc; First generating means for generating a first recording clock having a frequency based on the relative speed determined by the determining means; second generating means for generating a second recording clock having a constant frequency; When performing recording in a zone different from the zone where the light condensed by is located, the moving means moves the condensing means to the zone in which recording is performed, and is judged by the second judging means. When a relative speed becomes a first speed close to a reference speed for a zone where recording is performed, a first recording method for recording data based on a first recording clock generated by the first generating means. If, when recorded by the first recording means, the closer than the above criteria speed for the zone in which the relative speed makes a record is determined by the second determining means first speed 2
A second recording means for recording data based on a second recording clock generated by the second generating means when the speed becomes the speed, and recording the data by the first recording means. At that time,
When the first determining means determines that the address data of the header portion of the continuous sectors is not read continuously, the first executing means for executing an error process; While recording
When it is determined by the first determining means that the address data of the header portion of the continuous sector is not continuously read, it is checked whether or not this sector is a defective sector recorded in the defect management area. For that defective sector,
Second execution means for executing a slipping replacement process for skipping a defective sector and continuing to record data in the next sector, and performing a linear replacement replacement process for recording data in a replacement sector if the sector is not a defective sector; An optical disc device, comprising: 13. The method according to claim 1, wherein the first speed is a speed within ± 10% of the reference speed, and the second speed is a speed within ± 1% of the reference speed. Item 13. The optical disk device according to item 12. 14. A track having a groove and a land for recording spiral or concentric data, and a header and data comprising a fixed length of groove and land and address data given to a head portion are recorded. An optical disc device for recording data on an optical disc having a plurality of zones each including a recording area, a plurality of zones each including a plurality of tracks, and a defect management area in which defective sectors are recorded in advance, Rotating means for rotating the light at a different number of revolutions for each zone; condensing means for condensing light on the optical disc; and moving the condensing means in the radial direction of the optical disc to collect light on the optical disc. Moving means for moving the light to be emitted to each zone; and reading the address data in the header section. Means taken by the address data read by the reading means,
First determining means for determining whether or not address data of a header portion of continuous sectors is continuously read; and address data read by the reading means.
Second determining means for determining a transit time of the light in two adjacent sectors of the optical disc and determining a relative speed between the light condensed by the condensing means and the optical disc; First generating means for generating a first recording clock having a frequency based on the relative speed determined by the determining means; second generating means for generating a second recording clock having a constant frequency; When performing recording in a zone different from the zone where the light condensed by is located, the moving means moves the condensing means to the zone in which recording is performed, and is judged by the second judging means. When a relative speed becomes a first speed close to a reference speed for a zone where recording is performed, a first recording method for recording data based on a first recording clock generated by the first generating means. If, when recorded by the first recording means, the closer than the above criteria speed for the zone in which the relative speed makes a record is determined by the second determining means first speed 2
A second recording means for recording data based on a second recording clock generated by the second generating means when the speed becomes the speed, and recording the data by the first recording means. At that time,
When the first determining means determines that the address data of the header portion of the continuous sectors is not read continuously, the first executing means for executing an error process; While recording
When it is determined by the first determining means that the address data of the header portion of the continuous sector is not continuously read, it is checked whether or not this sector is a defective sector recorded in the defect management area. For that defective sector,
Second execution means for executing a slipping replacement process for skipping a defective sector and continuing to record data in the next sector, and performing a linear replacement replacement process for recording data in a replacement sector if the sector is not a defective sector; An optical disc device, comprising: 15. The method according to claim 15, wherein the first speed is a speed within ± 10% of the reference speed, and the second speed is a speed within ± 1% of the reference speed. Item 15. An optical disk device according to item 14.