JPH11316957A - Optical disk device, dvd-ram drive device, and tracking method of optical disk device and tracking method of dvd-ram drive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correctly perform track-on operation at the time of seeking and track jumping. SOLUTION: At the time of seeking and track jumping, a header part detecting circuit 40 generates a header part detection signal from a tracking error signal and outputs it to a tracking control circuit 28, which performs track-on control in a data area other than a header area detected with the header part detection signal. Consequently, the optical disk device and DVD- RAM drive device which can correctly perform track-on operation at the time of seeking and track jumping and the tracking method of the optical disk device and the tracking method of the DVD-RAM drive device can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a groove and a land for recording spiral or concentric data, a header section comprising a fixed length of groove and land, and a data area for recording data. The data is recorded on an optical disc such as a DVD-RAM disc having a plurality of recording areas consisting of the following, or the data recorded on the optical disc such as a DVD-RAM disc is reproduced. The present invention relates to an optical disk device, a DVD-RAM drive device, a tracking method for an optical disk device, and a tracking method for a DVD-RAM drive device, which are alternately formed for a disk and a land.

[0002]

2. Description of the Related Art In recent years, a plurality of grooves and lands for recording spiral or concentric data, and a plurality of headers each having a fixed length of grooves and lands and consisting of address data and a data area for recording data are provided. Recording data on an optical disc having a recording area of
Or play back the data recorded on the optical disc,
An optical disk device or DVD-RAM drive device or the like in which the address data (pre-pit string) of the header portion is alternately formed for a groove and a land has been developed.

[0003] Such an optical disk device or DVD
In a RAM drive device or the like, a track-on operation during a seek or a track jump is performed near a target point. However, when a large swing such as a defect occurs near the target point, the track-on operation is not performed normally.

[0004]

As described above, in an optical disk device or a DVD-RAM drive device, track-on at the time of seek or track jump is performed by:
Although this is performed near the target point, there is a problem that if a large swing such as a defect occurs near the target point, track-on is not performed normally.

Accordingly, the present invention provides an optical disk device, a DVD-RAM drive device, a tracking method for an optical disk device, and a tracking method for a DVD-RAM drive device, which can normally perform track-on during seek or track jump. The purpose is to:

[0006]

SUMMARY OF THE INVENTION An optical disk apparatus according to the present invention has a groove and a land recording 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. And a data area in which data is recorded. Data is recorded on an optical disc in which the address of the header section is alternately formed for a groove and a land, or In an optical disc apparatus for reproducing recorded data, a condensing means for condensing light on the optical disc, a moving means for moving the condensing means in a direction perpendicular to the optical axis, and a light beam from the optical disc. Detecting means for detecting a signal, and tracking the track on the optical disk based on a detection signal from the detecting means. A header detection means for detecting a header of the optical disc from the error signal; and a header detection signal detected by the header detection in a data area other than the header of the optical disc, and a detection signal from the detection means. And control means for controlling the movement of the light condensing means by the moving means based on a tracking error signal for the track of the optical disk based on the tracking error signal.

The optical disk apparatus of the present invention has a groove and a land recording track for recording spiral or concentric data, and has a header and data consisting of a fixed length of groove and land and address data. It has a plurality of recording areas consisting of a data area,
In an optical disk device that records data on an optical disk in which addresses of the header section are alternately formed for grooves and lands or reproduces data recorded on the optical disk, light is collected on the optical disk. Focusing means for emitting light, moving means for moving the focusing means in a direction orthogonal to the optical axis, detecting means for detecting light from the optical disk, and the optical disk based on a detection signal from the detecting means Header detecting means for detecting the header of the optical disc from a tracking error signal for the track of the optical disc; and a header detected by the header detecting means based on a tracking error signal for the track of the optical disc based on the detection signal from the detecting means. The data area other than the header section of the optical disk using the And a control means for performing control to track-on the condensing means in the mobile unit.

The optical disk apparatus according to the present invention has a groove and a land recording track for recording spiral or concentric data, and has a header and data consisting of a fixed length of groove and land and composed of address data. It has a plurality of recording areas consisting of a data area,
In an optical disk device that records data on an optical disk in which addresses of the header section are alternately formed for grooves and lands or reproduces data recorded on the optical disk, light is collected on the optical disk. Focusing means for emitting light, moving means for moving the focusing means in a direction orthogonal to the optical axis, detecting means for detecting light from the optical disk, and based on a detection signal from the detecting means, Signal generating means for generating a tracking error signal for the track of the optical disk, header detecting means for detecting the header of the optical disk from the tracking error signal generated by the signal generating means, and detection by the header detecting means The signal generation means generates a header part detection signal in the data area other than the header part of the optical disk by the signal generation means. And a control means for controlling the movement of said focusing means by said moving means by produced tracking error signal.

The optical disk apparatus of the present invention has a groove and a land recording track for recording spiral or concentric data, and a header and data consisting of a fixed length of groove and land and address data are recorded. It has a plurality of recording areas consisting of a data area,
In an optical disk device that records data on an optical disk in which addresses of the header section are alternately formed for grooves and lands or reproduces data recorded on the optical disk, light is collected on the optical disk. Focusing means for emitting light, moving means for moving the focusing means in a direction orthogonal to the optical axis, detecting means for detecting light from the optical disk, and based on a detection signal from the detecting means, A signal generating means for generating a tracking error signal for the track of the optical disk, a header detecting means for detecting a header of the optical disk from the tracking error signal generated by the signal generating means, and a signal generated by the signal generating means. Using the tracking error signal, the header portion detection signal detected by the header portion detection means is used to In the moving means in the data area other than the header portion of the optical disc and a control means for performing control to track-on the condensing means.

The DVD-RAM drive device of the present invention has a groove and a land recording track for recording spiral or concentric data, and a header and data comprising address data composed of grooves and lands of a fixed length. Data is recorded on a DVD-RAM disc having a plurality of recording areas each including a data area to be recorded, and the address of the header part is alternately formed for a groove and a land. RAM
DVD-R for reproducing data recorded on a disc
In the AM drive device, a condensing means for condensing light on the DVD-RAM disk, a moving means for moving the condensing means in a direction orthogonal to the optical axis,
Detection means for detecting light from the RAM disk, and the DVD-RAM based on a detection signal from the detection means
Header detecting means for detecting a header of the DVD-RAM disk from a tracking error signal for a track of the disk; and data other than the header of the DVD-RAM disk based on the header detecting signal detected by the header detecting means. The area comprises a control means for controlling the movement of the condensing means by the moving means in accordance with a tracking error signal for the track of the DVD-RAM disk based on the detection signal from the detecting means.

[0011] The DVD-RAM drive device of the present invention has a groove and a land recording track for recording spiral or concentric data, and has a header and data consisting of a fixed length of groove and land and composed of address data. Data is recorded on a DVD-RAM disc having a plurality of recording areas each including a data area to be recorded, and the address of the header part is alternately formed for a groove and a land. RAM
DVD-R for reproducing data recorded on a disc
In the AM drive device, a condensing means for condensing light on the DVD-RAM disk, a moving means for moving the condensing means in a direction orthogonal to the optical axis,
Detection means for detecting light from the RAM disk, and the DVD-RAM based on a detection signal from the detection means
Header detecting means for detecting a header of the DVD-RAM disk from a tracking error signal for the track of the disk; and a tracking error signal for the track of the DVD-RAM disk based on the detection signal from the detecting means. The DVD-RAM using the header detection signal detected by the detection means.
And control means for controlling the light-collecting means to track on the data area other than the header portion of the disk by the moving means.

The DVD-RAM drive device of the present invention has a groove and a land recording track for recording spiral or concentric data, and has a header and data consisting of a fixed length of groove and land and address data. Data is recorded on a DVD-RAM disc having a plurality of recording areas each including a data area to be recorded, and the address of the header part is alternately formed for a groove and a land. RAM
DVD-R for reproducing data recorded on a disc
In the AM drive device, a condensing means for condensing light on the DVD-RAM disk, a moving means for moving the condensing means in a direction orthogonal to the optical axis,
Detecting means for detecting light from the RAM disk, and the DVD-R based on a detection signal from the detecting means.
Signal generating means for generating a tracking error signal for a track of an AM disk; and a DVD-RAM based on the tracking error signal generated by the signal generating means.
A header detecting means for detecting a header of the disc; and a tracking signal generated by the signal generating means in a data area other than the header of the DVD-RAM disc by a header detecting signal detected by the header detecting means. Control means for controlling the movement of the light condensing means by the moving means in response to an error signal.

The DVD-RAM drive device according to the present invention has a groove and a land recording track for recording spiral or concentric data, and a header and data comprising address data composed of a fixed length of groove and land. Data is recorded on a DVD-RAM disc having a plurality of recording areas each including a data area to be recorded, and the address of the header part is alternately formed for a groove and a land. RAM
DVD-R for reproducing data recorded on a disc
In the AM drive device, a condensing means for condensing light on the DVD-RAM disk, a moving means for moving the condensing means in a direction orthogonal to the optical axis,
Detecting means for detecting light from the RAM disk, and the DVD-R based on a detection signal from the detecting means.
Signal generating means for generating a tracking error signal for a track of an AM disk; and a DVD-RAM based on the tracking error signal generated by the signal generating means.
A header portion detecting means for detecting a header portion of the disc; and a header portion of the DVD-RAM disc using a header error detection signal detected by the header portion detecting means based on a tracking error signal generated by the signal generating means. And control means for controlling to turn on the light collecting means by the moving means in a data area other than the data area.

A tracking method for an optical disk device according to the present invention has a groove and a land recording track for recording spiral or concentric data, and a header and data comprising address data composed of a fixed length of groove and land. A plurality of recording areas each including a data area to be recorded, and data is recorded on an optical disk in which addresses of the header section are alternately formed for grooves and lands, or are recorded on the optical disk. A tracking method for an optical disk device that reproduces data stored therein, wherein the light is focused on the optical disk by a focusing means, and the light from the optical disk is detected by the focusing,
A tracking error signal for a track of the optical disc is generated based on the detection signal, a header detection signal for detecting a header section of the optical disc is generated from the generated tracking error signal, and the header error is generated based on the tracking error signal. A control is performed to track-on the light-collecting means in a data area other than the header section of the optical disk by using a section detection signal.

A tracking method for a DVD-RAM drive device according to the present invention has a groove and a land recording 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. And a data area in which data is recorded. The data is recorded on a DVD-RAM disk in which the addresses of the header section are alternately formed for the groove and the land, Alternatively, there is provided a tracking method for a DVD-RAM drive device for reproducing data recorded on a DVD-RAM disc, wherein light is condensed on the DVD-RAM disc by a condensing means, and the light from the DVD-RAM disc is collected. The light is detected, and based on the detection signal, a track is recorded on the DVD-RAM disk. Generating a header error detection signal for detecting a header portion of the DVD-RAM disc from the generated tracking error signal, and converting the header error detection signal based on the generated tracking error signal. Using the above DVD
A feature is that control is performed to track on the condensing means in a data area other than the header section of the RAM disk.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an optical disk device such as a DVD-RAM drive device. This optical disc apparatus records data on an optical disc 1 using focused light, or reproduces recorded data.

The optical disk 1 is formed by coating a metal film layer such as tellurium or bismuth in a donut shape on the surface of a circular substrate made of, for example, glass or plastics. This is a phase change type rewritable disc in which data is recorded or recorded data is reproduced using both lands, and address data is recorded at predetermined intervals by recording marks in a mastering step.

The optical disk 1 is, as shown in FIG.
A plurality of zones 1a composed of a plurality of tracks in the radial direction,
It is divided into ... The clock signal for each zone 1a is the same, and the rotation speed (speed) of the optical disc 1 for each zone 1a is different (slower from the inner circumference to the outer circumference). The number of sectors in one track differs for each zone 1a,. The relationship between the speed data as the number of revolutions for each of the zones 1a,... And the number of sectors per track is recorded in the table 2a of the memory 2 as shown in FIG.

On the tracks of the respective zones 1a,... Of the optical disc 1, headers 1 ₁ ,... On which addresses and the like are recorded are preformatted in advance for each sector.

The header ₁₁ is formed when the groove is formed. This header part 1 ₁
4 is composed of a plurality of pits 101 as shown in FIG. 4 and is preformatted for the groove 102 as shown in the figure. The center of the pit 101 is on the same line as the tangent of the groove 102 and the land 103. Exists in position.

As shown in FIG. 4, the pit string ID1 is the header of the groove 1, the pit string ID2 is the header of the land 1, the pit string ID3 is the header of the groove 2, the pit string ID4 is the header of the land 2, The pit string ID5 is a header part of the groove 3, and the pit string ID6 is a header part of the land 3.

Therefore, the header portion for the groove and the header portion for the land are formed alternately (in a staggered manner).
FIG. 5 shows a format for each sector of each zone 1a,.

[0023] In FIG. 5, one sector is composed of 2697 bytes (bytes), (corresponding to the header portion 1 ₁₎ 128-byte header area, 5-byte mirror mark region, 2
It consists of a 564-byte recording area.

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 is an area where predetermined data is recorded when an optical disc is manufactured. This header area is composed of four address areas PID1, PID2, PID3, and PID4.

Each of the address areas PID1 to PID4 is composed of 46 bytes or 18 bytes, and a 36-byte or 8-byte synchronization code part VFO (Variable Frequency O).
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).

Address areas PID1 and PID3 are 36
It has a byte synchronization code part VFO1 and has an address area P
ID2 and PID4 are an 8-byte synchronization code part VFO2
have.

The synchronization code portions VFO1 and VFO2 are areas for pulling in the PLL. The synchronization code portion VFO1 records a sequence of "010..." In channel bits for "36" bytes (646 bits in channel bits). (Recording a pattern at a fixed interval), and the synchronization code portion VFO
Reference numeral 2 denotes a sequence of “010...” Of channel bits recorded for “8” bytes (128 bits of channel bits).

The address mark AM is a "3" byte synchronization code indicating where the sector address starts. As a pattern of each byte of the address mark AM, a special pattern which does not appear in the data portion of "0100100000000100" is used.

The address parts PID1 to PID4 are sector addresses (including ID numbers) as 4-byte address information.
Is an area where is recorded. The ID number is, for example, PI
In the case of D1, it is "1" and is a number representing the number of the overwriting four times in _one header section 11.

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 a state information necessary for demodulation and has a role of poling as the header portion 1 ₁ is completed by a space. The mirror mark area is
It is used for offset correction of a tracking error signal, timing generation of a land / groove switching signal, and the like.

The recording area includes a gap area of 17 to 19 bytes, a VFO3 area of 50 bytes, a data area of 2418 bytes, a guard data area of 30 bytes, and 47 bytes.
It consists of a buffer area of up to 49 bytes.

The gap area is an area where nothing is written. The VFO3 area is also an area for PLL lock,
It is also an area where a synchronization code is inserted in the same pattern to synchronize byte boundaries.

The data area includes a synchronization code, an ECC (Erro
r Collection Code), EDC (Error Detection Cod)
e) An area composed of user data and the like. The guard data area is an area provided in order to prevent terminal deterioration at the time of repeated recording peculiar to the phase change recording medium from reaching the data area.

The buffer region, as the data area does not overlap the next header portion 1 _1, which is an area provided for absorbing and rotation fluctuation of the motor for rotating the optical disc 1.

The reason why the gap area is expressed as 17 to 19 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.

In FIG. 1, the optical disk 1 is rotated by a motor 3 at a different rotation speed for each zone, for example. The motor 3 is controlled by a motor control circuit 4. Recording and reproduction of data on the optical disk 1 are performed by the optical head 5. The optical head 5 is
The linear motor 6 is fixed to a drive coil 7 constituting a movable portion, and the drive coil 7 is connected to a linear motor control circuit 8.

A speed detector 9 is connected to the linear motor control circuit 8, and the optical head 5 detected by the speed detector 9
Is sent to the linear motor control circuit 8. A permanent magnet (not shown) is provided at a fixed portion of the linear motor 6. When the drive coil 7 is excited by the linear motor control circuit 8, the optical head 5 is moved in the radial direction of the optical disc 1.

The optical head 5 is provided with an objective lens 10 supported by a wire or a leaf spring (not shown). The objective lens 10 can be moved in the focusing direction (the direction of the optical axis of the lens) by driving the drive coil 11, and can be moved in the tracking direction (the direction orthogonal to the optical axis of the lens) by driving the drive coil 12. Is possible.

Under the control of the laser control circuit 13, a laser beam is emitted from the semiconductor laser oscillator 9.
The laser control circuit 13 includes a modulation circuit 14 and a laser drive circuit 15, and operates in synchronization with a recording clock signal supplied from the PLL circuit 16. The modulation circuit 14 modulates the recording data supplied from the error correction circuit 32 into a signal suitable for recording, that is, 8-16 modulated data. The laser drive circuit 15 drives a semiconductor laser oscillator (or an argon-neon laser oscillator) 19 according to the 8-16 modulation data from the modulation circuit 14.

PLL (Phase Locked Loop) circuit 16
During recording, the basic clock signal generated from the crystal oscillator 17 is divided by a frequency division value set by the CPU 30 or set to a frequency corresponding to the time interval (header interval) at which the header section 11 on the optical disc ₁ is reproduced. The frequency is divided to generate a clock signal for recording, and at the time of reproduction,
A reproduction clock signal corresponding to the reproduced synchronization code is generated. Further, the PLL circuit 16 includes a CPU 30
Control signal from the controller and the binarization circuit 41 of the data reproduction circuit 18
And a clock signal for recording or reproduction is selectively output in accordance with the signal from.

The laser light beam emitted from the semiconductor laser oscillator 19 is irradiated on the optical disk 1 via the collimator lens 20, the half prism 21, and the objective lens 10. The reflected light from the optical disc 1
0, a half prism 21, a condenser lens 22, and a cylindrical lens 23, and are guided to a photodetector 24.

The photodetector 24 is a four-divided photodetection cell 24
a, 24b, 24c and 24d. The output signal of the photodetector cell 24a is supplied to one end of the adder 26a via the amplifier 25a. The output signal of the light detection cell 24b is supplied to one end of an adder 26b via an amplifier 25b. The output signal of the light detection cell 24c is
The signal c is supplied to the other end of the adder 26a. The output signal of the light detection cell 24d is added to an adder 2 via an amplifier 25d.
6b is supplied to the other end.

Further, the output signal of the light detection cell 24a is
The signal is supplied to one end of the adder 26c via the amplifier 25a. The output signal of the light detection cell 24b is supplied to one end of an adder 26d via an amplifier 25b. Photodetection cell 24
The output signal of c is supplied to the other end of the adder 26d via the amplifier 25c. The output signal of the light detection cell 24d is supplied to the other end of the adder 26c via the amplifier 25d.

The output signal of the adder 26a is a differential amplifier OP
2, and the output signal of the adder 26b is supplied to the non-inverting input terminal of the differential amplifier OP. The differential amplifier OP2 outputs a signal related to the focus point according to the difference between the two output signals of the adders 26a and 26b. This output is supplied to the focusing control circuit 27. The output signal of the focusing control circuit 27 is supplied to the focusing drive coil 12. Thus, the laser light beam is controlled to be always just focused on the optical disc 1.

The output signal of the adder 26c is supplied to the inverting input terminal of the differential amplifier (signal generating means) OP1, and the output signal of the adder 26d is supplied to the non-inverting input terminal of the differential amplifier OP1. The differential amplifier OP1 includes an adder 26c,
A tracking error signal corresponding to the difference between the two output signals is output. This output is supplied to the tracking control circuit 28 and the header detection circuit 40. The header detection circuit 40 outputs a header detection signal in accordance with the tracking error signal from the differential amplifier OP1.
The header detection signal is supplied to the tracking control circuit 28. The tracking control circuit 28 creates a track drive signal according to the tracking error signal from the differential amplifier OP1 and the header detection signal from the header detection circuit 40.

The track driving signal output from the tracking control circuit 28 is the driving coil 1 in the tracking direction.
1 is supplied. Further, a tracking error signal used in the tracking control circuit 28 is supplied to the linear motor control circuit 8.

By performing the above-mentioned focusing and tracking, each of the light detection cells 24a, 24a,
... the sum signal of the output signals of 24d,
The change in the reflectance from the pits (recording data) formed on the track is reflected in the output signal of the adder 26e, which is the addition of the two output signals c and 26d. This signal is supplied to the data reproducing circuit 18. Data reproduction circuit 18
Reproduces recorded data based on a reproduction clock signal from the PLL circuit 16.

The data reproducing circuit 18 includes an adder 26
e, based on the output signal of e and the reproduction clock signal from the PLL circuit 16, to detect the sector mark in the preformat data, and to supply the sector mark 2 supplied from the PLL circuit 16.
Based on the digitized signal and the reproduction clock signal, a track number and a sector number as address information are reproduced from the binarized signal.

The reproduced data of the data reproducing circuit 18 is
9 is supplied to the error correction circuit 32. The error correction circuit 32 outputs an error correction code (EC
C) to correct the error, or add an error correction code (ECC) to the recording data supplied from the interface circuit 35 and output it to the memory 2.

The reproduced data whose error is corrected by the error correction circuit 32 is transmitted to the bus 29 and the interface circuit 3.
5 is supplied to an optical disk control device 36 as an external device. The recording data emitted from the optical disk control device 36 is transmitted to the interface circuit 35 and the bus 29.
Is supplied to the error correction circuit 32 via the.

When the objective lens 10 is moved by the tracking control circuit 28, the linear motor 6, that is, the optical head 5 is moved by the linear motor control circuit 8 so that the objective lens 10 is positioned near the center position in the optical head 5. Be moved.

The D / A converter 31 includes a focusing control circuit 27, a tracking control circuit 28, a linear motor control circuit 8, and a CPU 30 for controlling the entire optical disk apparatus.
Used to transfer data between and.

The motor control circuit 4, the linear motor control circuit 8, the laser control circuit 15, the PLL circuit 16, the data reproduction circuit 18, the focusing control circuit 27, the tracking control circuit 28, the error correction circuit 32, and the like are connected via a bus 29. It is controlled by the CPU 30. The CPU 30 performs a predetermined operation according to a program recorded in the memory 2.

As shown in FIG. 6, for example, the header detection circuit 40 includes a low-pass filter 41, a slice level generator 42, comparators 43 and 44, and an OR gate 4.
5 is comprised.

The low-pass filter 41 passes a low-frequency part of the tracking error signal supplied from the differential amplifier OP1 as shown in FIG. 7A, thereby reducing the fluctuation of the header part. Generate The slice level generation unit 42 outputs the low-pass filter 4
A slice level is generated based on the signal from 1. The comparator 43 compares the tracking error signal supplied from the differential amplifier OP1 with the slice level from the slice level generation unit 42, and detects a header portion on the disk outer side (outer side) above the slice level, and
An outer header detection signal as shown in FIG. 7B is output. The comparator 44 compares the tracking error signal supplied from the differential amplifier OP1 with the slice level from the slice level generation unit 42, and responds to the detection of the disk inner side (inner side) header section below the slice level. , And outputs an inner header detection signal as shown in FIG. The OR gate 45 outputs a header part detection signal as shown in FIG. 7D by ORing the outer header detection signal from the comparator 43 and the inner header detection signal from the comparator 44.

7A to 7D are signals when tracking a land. When tracking to a groove, the inner header comes first and the outer header comes later.

Next, the tracking operation in the above configuration will be described with reference to FIGS. For example, it is assumed that the tracking control circuit 28 performs tracking control using a signal detected by the optical head 5 in the optical disk apparatus.

FIG. 8 shows a tracking error signal at the time of a tracking operation. Conventionally, as shown in FIG. 8, at the time of seek and track jump, a header area in which the header is shaken due to the detection of the header ₁₁ as shown in FIG. But he was on track. Therefore, the header part 1 ₁
When the header was shaken due to the detection of, the track-on was not performed normally.

Therefore, at the time of seek and track jump in the present invention, the header detection circuit 40 detects the tracking error signal shown in FIG.
Is generated and output to the tracking control circuit 28. The tracking control circuit 28 performs the track-on control in the data area other than the header area detected by the header detection signal.

As described above, according to the embodiment of the present invention, when a seek or a track jump is performed, track-on in the header area is large and tracking control often fails. By detecting an area and performing tracking control in a data area other than the header area, it is possible to reduce track-on failures such as seek and track jump.

[0062]

As described above in detail, according to the present invention, an optical disk device, a DVD-RAM drive device, a tracking method for an optical disk device, and a DV that can normally perform track-on during seek or track jump.
A tracking method for a D-RAM drive device can be provided.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of an optical disk device for explaining an embodiment of the present invention.

FIG. 2 is a view for explaining an example of the format of an optical disc.

FIG. 3 is a diagram for explaining a table in which speed data values corresponding to the number of rotations of the optical disk for each zone are stored.

FIG. 4 is a diagram for explaining preformat data in a header portion.

FIG. 5 is a diagram showing a sector format of an optical disc.

FIG. 6 is a block diagram showing a configuration of a header detection circuit.

FIG. 7 is a diagram showing signal waveforms of main parts of a header detection circuit.

FIG. 8 is a waveform chart showing a tracking error signal during a tracking operation.

FIG. 9 is a waveform chart showing a tracking error signal and a header part detection signal.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Optical disk 1 ₁ ... Header part 5 ... Optical head (condensing means) 24 ... Photodetector 28 ... Tracking control circuit (control means) 30 ... CPU 36 ... Optical disk control device 40 ... Header part detecting circuit (Header part detecting means) 41: Low-pass filter 42: Slice level generator 43, 44: Comparator 45: OR gate

Claims (10)

[Claims] The present invention has a groove and land recording track for recording spiral or concentric data, and comprises a header section composed of a fixed length of groove and land and composed of address data, and a data area in which data is recorded. An optical disc device that has a plurality of recording areas and records data on an optical disc in which the address of the header section is alternately formed for grooves and lands, or reproduces data recorded on the optical disc. Focusing means for focusing light on the optical disc; moving means for moving the focusing means in a direction orthogonal to the optical axis; detecting means for detecting light from the optical disc; From the tracking error signal for the track of the optical disk based on the detection signal from the A header error detecting means for detecting, and a tracking error signal for a track of the optical disc based on a detection signal from the detecting means in a data area other than the header of the optical disc by a header detecting signal detected by the header detecting means. An optical disk device, comprising: a control unit that controls the movement of the light-collecting unit by the moving unit. 2. It has a groove and a land recording track for recording spiral or concentric data, and comprises a header section composed of a fixed length of groove and land and composed of address data, and a data area in which data is recorded. An optical disc device that has a plurality of recording areas and records data on an optical disc in which the address of the header section is alternately formed for grooves and lands, or reproduces data recorded on the optical disc. Focusing means for focusing light on the optical disc; moving means for moving the focusing means in a direction orthogonal to the optical axis; detecting means for detecting light from the optical disc; From the tracking error signal for the track of the optical disk based on the detection signal from the A header part detecting means for detecting, and a tracking error signal for a track of the optical disk based on a detection signal from the detecting means, using a header part detection signal detected by the header part detecting means to detect a part other than the header part of the optical disk. An optical disk device, comprising: control means for performing control to turn on the light-collecting means by the moving means in a data area. 3. It has a groove and land recording track for recording spiral or concentric data, and comprises a header section composed of grooves and lands of a fixed length and composed of address data, and a data area in which data is recorded. An optical disc device that has a plurality of recording areas and records data on an optical disc in which the address of the header section is alternately formed for grooves and lands, or reproduces data recorded on the optical disc. Focusing means for focusing light on the optical disc; moving means for moving the focusing means in a direction orthogonal to the optical axis; detecting means for detecting light from the optical disc; Signal generating means for generating a tracking error signal for a track of the optical disc based on the detection signal from Header detecting means for detecting the header of the optical disc from the tracking error signal generated by the signal generating means; and a data area other than the header of the optical disc by the header detecting signal detected by the header detecting means. An optical disk device, comprising: a control unit that controls the movement of the focusing unit by the moving unit based on a tracking error signal generated by the signal generation unit. 4. It has a groove and land recording track for recording spiral or concentric data, and comprises a header section composed of a fixed length of groove and land and composed of address data, and a data area in which data is recorded. An optical disc device that has a plurality of recording areas and records data on an optical disc in which the address of the header section is alternately formed for grooves and lands, or reproduces data recorded on the optical disc. Focusing means for focusing light on the optical disc; moving means for moving the focusing means in a direction orthogonal to the optical axis; detecting means for detecting light from the optical disc; Signal generating means for generating a tracking error signal for a track of the optical disc based on the detection signal from Header detecting means for detecting the header of the optical disc from the tracking error signal generated by the signal generating means; and header detecting by the header detecting means by the tracking error signal generated by the signal generating means. An optical disc device comprising: control means for performing control to turn on the light-collecting means by the moving means in a data area other than the header section of the optical disc using a detection signal. 5. It has a groove and land recording track for recording spiral or concentric data, and comprises a header section composed of grooves and lands of a fixed length and composed of address data, and a data area on which data is recorded. A DVD-ROM which has a plurality of recording areas and in which the addresses of the header section are alternately formed for grooves and lands.
Record data to RAM disk or DV
In a DVD-RAM drive device for reproducing data recorded on a D-RAM disk, a condensing means for condensing light on the DVD-RAM disc, and the condensing means in a direction orthogonal to its optical axis. Moving means for moving; detecting means for detecting light from the DVD-RAM disc; and DVD-RA based on a detection signal from the detecting means.
Header detecting means for detecting the header of the DVD-RAM disk from the tracking error signal for the track of the M disk; and detecting the header other than the header of the DVD-RAM by the header detecting signal detected by the header detecting means. In the data area, the D based on the detection signal from the detection means is stored.
A DVD-RAM drive device, comprising: a control means for controlling the movement of the light-collecting means by the moving means in accordance with a tracking error signal for a track of a VD-RAM disk. 6. It has a groove and a land recording track for recording spiral or concentric data, and comprises a header section composed of grooves and lands of a fixed length and composed of address data, and a data area in which data is recorded. A DVD-ROM which has a plurality of recording areas and in which the addresses of the header section are alternately formed for grooves and lands.
Record data to RAM disk or DV
In a DVD-RAM drive device for reproducing data recorded on a D-RAM disk, a condensing means for condensing light on the DVD-RAM disc, and the condensing means in a direction orthogonal to its optical axis. Moving means for moving; detecting means for detecting light from the DVD-RAM disc; and DVD-RA based on a detection signal from the detecting means.
Header detection means for detecting a header of the DVD-RAM disk from a tracking error signal for a track of the M disk; and the DVD-RA based on a detection signal from the detection means.
In accordance with the tracking error signal for the track of the M disk, the focusing section is track-on by the moving section to the data area other than the header section of the DVD-RAM disk using the header section detection signal detected by the header section detecting section. A DVD-RAM drive device, comprising: 7. It has a groove and land recording track for recording spiral or concentric data, and comprises a header section composed of a fixed length groove and land and composed of address data, and a data area in which data is recorded. A DVD-ROM which has a plurality of recording areas and in which the addresses of the header section are alternately formed for grooves and lands.
Record data to RAM disk or DV
In a DVD-RAM drive device for reproducing data recorded on a D-RAM disk, a condensing means for condensing light on the DVD-RAM disc, and the condensing means in a direction orthogonal to its optical axis. Moving means for moving; detecting means for detecting light from the DVD-RAM disk; and a DVD-ROM based on a detection signal from the detecting means.
Signal generating means for generating a tracking error signal for a track of the RAM disk; header detecting means for detecting a header of the DVD-RAM disk from the tracking error signal generated by the signal generating means; Control means for controlling the movement of the light condensing means in the data area other than the header part of the DVD-RAM disc by the header error signal generated by the signal generating means, A DVD-RAM drive device, comprising: 8. A recording track of grooves and lands for recording spiral or concentric data, comprising a header section composed of grooves and lands of a fixed length and composed of address data, and a data area for recording data. A DVD-ROM which has a plurality of recording areas and in which the addresses of the header section are alternately formed for grooves and lands.
Record data to RAM disk or DV
In a DVD-RAM drive device for reproducing data recorded on a D-RAM disk, a condensing means for condensing light on the DVD-RAM disc, and the condensing means in a direction orthogonal to its optical axis. Moving means for moving; detecting means for detecting light from the DVD-RAM disk; and a DVD-ROM based on a detection signal from the detecting means.
Signal generating means for generating a tracking error signal for a track on the RAM disk; header detecting means for detecting the header of the DVD-RAM disk from the tracking error signal generated by the signal generating means; Control for tracking on the condensing means by the moving means to a data area other than the header part of the DVD-RAM disk by using the header detection signal detected by the header detection means in accordance with the generated tracking error signal. A DVD-RAM drive device, comprising: control means for performing the following. 9. It has a groove and land recording track for recording spiral or concentric data, and comprises a header section composed of grooves and lands of a fixed length and composed of address data, and a data area in which data is recorded. An optical disc device that has a plurality of recording areas and records data on an optical disc in which addresses of the header section are alternately formed for grooves and lands, or reproduces data recorded on the optical disc. In a tracking method, light is condensed on the optical disc by a light condensing means, light from the optical disc is detected by the condensing, and a tracking error signal for a track of the optical disc is generated based on the detection signal. To detect the header of the optical disk from the generated tracking error signal. Generating a header detection signal, and using the tracking error signal, performing control to turn on the light condensing means in a data area other than the header of the optical disc by using the header detection signal. Tracking method for an optical disk device to be used. 10. A groove and land recording track for recording spiral or concentric data, comprising a header section comprising a fixed length of groove and land and address data, and a data area for recording data. DVD having a plurality of recording areas and the addresses of the header section being alternately formed for grooves and lands
Record data on a RAM disk, or
What is claimed is: 1. A tracking method for a DVD-RAM drive device for reproducing data recorded on a VD-RAM disk, comprising: condensing light on the DVD-RAM disk by a condensing means; Is detected, and a tracking error signal for the track of the DVD-RAM disc is generated based on the detection signal.
Generating a header detection signal for detecting a header of the AM disk, and using the generated header error signal to generate the DVD-RAM based on the generated tracking error signal;
A DVD-RAM drive device, wherein control is performed to turn on the light-collecting means in a data area other than a header section of a disk.