JP2715674B2 - Optical disc recording method, recording / reproducing apparatus, and optical disc - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk recording method and an optical disk recording / reproducing apparatus, and more specifically, to a method for recording an optical disk.
Irradiate a laser beam of about micron on the optical disk,
The present invention relates to a rewritable optical disk recording method and a recording / reproducing apparatus capable of repeatedly recording / reproducing a signal by recording / reproducing a signal at a high density and erasing the once recorded signal by laser irradiation.

[0002]

2. Description of the Related Art A conventional optical disk recording / reproducing apparatus and recording method will be described below with reference to the accompanying drawings.

FIG. 7A shows a configuration diagram of a recording system of a conventional optical disk recording / reproducing apparatus. The modulation circuit (101)
The input data (108) is modulated according to the modulation rule, and the modulated data (10) is modulated according to a request from the selector (104).
9).

[0004] The fixed pattern generation circuit (102) responds to a request from the selector (104) to generate a fixed pattern FM.
(110) is generated.

[0005] In response to a request from the selector (104), the synchronization signal generation circuit (103) generates a synchronization signal VFO (11).
1) is generated.

The selector (104) outputs the recording data (112) by combining the modulation data (109), the fixed pattern FM (110), and the synchronization signal VFO (111).

The laser drive circuit (105) drives the semiconductor laser (106) according to the recording data (112),
The recording is performed by irradiating the optical disk (107) with a change in reflectance, for example.

FIG. 7B shows a configuration diagram of a reproducing system of a conventional optical disk recording / reproducing apparatus.

The optical disk (107) is irradiated with a weak laser power, and the reflected light is detected by the photodetector (113) to obtain a reproduction signal RF (118).

[0010] The binarizing circuit (114) outputs the reproduced signal R
F (118) is binarized to generate a binarized signal DSG (11
9).

A PLL circuit (115) generates a reproduction reference clock CLK (120) from the binary signal (119).

[0012] The fixed pattern detection circuit (116) is provided with the binary signal DSG (119) and the reproduction reference clock C.
The fixed pattern FM (110) is detected from the LK (120), and a detection signal FMD (121) is generated.

The demodulation circuit (117) outputs the binary signal D
SG (119) and the reproduction reference clock CLK (12
0) and the detection signal FMD (121), demodulate the binary signal DSG (119) and output demodulated data.

FIG. 8A shows a data format recorded on an optical disk by the above-mentioned conventional optical disk recording / reproducing apparatus. Following the address part (35) preformatted on the optical disk in advance, the synchronization signal part (3
6), fixed pattern part (37), data part (38)
・ It is recorded in the order of

The synchronizing signal section (36) includes a synchronizing signal V
FO (FIG. 7, 111) is recorded and the PLL circuit (FIG. 7,
115) Used for locking.

A fixed pattern FM (FIG. 7, 110) is always recorded in the fixed pattern section (37), and is used to indicate the head of the data signal and to synchronize the data signal.

FIG. 8B shows a specific pattern of the conventional fixed pattern FM (FIG. 7, 110) at the time of 2-7 modulation. The conventional fixed pattern is a fixed pattern of 2-7-2-2 when expressed by a sign inversion interval, and has a structure in which the minimum sign inversion interval 2 and the maximum sign inversion interval 7 are adjacent to each other. Had an adjacent structure.

[0018]

FIG. 8 (c) shows, as an example, a modulation waveform of a laser when a conventional fixed pattern portion (37) is actually recorded on a phase change rewritable optical disk. Data 0 is irradiated with an erasing power (relatively low power) to erase previous data, and data 1 is irradiated with a recording power (relatively high power) to generate recording pits. The state of the recording pit is shown in FIG.

Next, consider the temperature change of the optical disk medium during recording. The conventional fixed pattern FM is a fixed pattern of 2-7-2-2 when expressed by a sign inversion interval, and has a structure in which the minimum sign inversion interval 2 and the maximum sign inversion interval 7 are adjacent to each other. Therefore, the point E which is the latter half of the interval 7 (FIG. 8)
(C)) shows that a relatively long time has elapsed since the recording power was irradiated, whereas point F (FIG. 8 (c)), which is the latter half of interval 2, was irradiated with the recording power. Since only a relatively short time has elapsed, the maximum reached temperature TF at the point _F is higher than the maximum reached temperature TE at the point _E ( _TF >
_TE ). A point G, which is the latter half of the last interval 2 of the fixed pattern 2-7-2-2, passes only after the recording power is irradiated twice in a short time at the minimum code inversion interval 2 and only for a short time. The maximum temperature T _{G at} point _G is
The maximum temperatures T _E and T F at the points _{F and F} are even higher (T _G > T _F > T _E ). FIG. 8 shows the state of the above temperature change.
(E).

The fixed pattern portion (37), in order to always the same fixed pattern FM is recorded, E, the temperature difference T _F -T _E between point F, E, the temperature difference T _G -T _E between the point G Will always occur. Therefore, in the conventional format, a large temperature difference is always applied to the same location in the fixed pattern portion (37), that is, a large thermal stress is applied to the medium, and the medium deteriorates faster than usual, and accurate recording cannot be performed. There was a problem that it disappeared.

[0021] In view of the above problems, an object of the present invention is to provide a data recording method and a recording / reproducing apparatus for suppressing deterioration of an optical disk.

[0022]

SUMMARY OF THE INVENTION To achieve the above object, the present invention is a recording method for an optical disk using a data format having a fixed pattern such that the minimum code inversion interval and the maximum code inversion interval are not adjacent to each other.

Further, the present invention is a recording method for an optical disc using a data format having a fixed pattern such that the minimum code inversion interval and the maximum code inversion interval are adjacent and the minimum code inversion interval is not adjacent.

According to the present invention, there is provided a method for recording data on an optical disk, comprising using a data format having a fixed pattern portion constituted by randomly selecting one data pattern for each recording from a plurality of different data patterns. It is.

[0025]

According to the present invention, the temperature difference generated at the time of recording on an optical disk at the time of recording is made smaller than before by making the interval between recording points by a laser of relatively high power irradiated at the time of data recording appropriate. Can be
Thermal stress applied to the medium can be reduced, deterioration can be suppressed, and the number of repetitions can be improved.

Further, according to the present invention, one data pattern is randomly selected for each recording from among a plurality of different data patterns and recorded in the fixed pattern portion, whereby the same fixed pattern is recorded for each recording. You can reduce the probability of recording, prevent thermal stress from always being applied to the same place as much as possible, disperse thermal stress,
Deterioration can be suppressed and the number of repetitions can be improved.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An optical disc recording method and a recording / reproducing apparatus according to embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a configuration diagram of an optical disk recording / reproducing apparatus according to a first embodiment of the present invention. FIG.
1A shows a recording system, and FIG. 1B shows a reproducing system. The same numbers as those in the conventional example of FIG. Hereinafter, points different from the conventional example of FIG. 7 will be described.

Reference numeral 1 denotes a fixed pattern generation circuit A, which outputs a fixed pattern FMA (2). Reference numeral 3 denotes a fixed pattern detection circuit A which detects the fixed pattern FMA and outputs a detection signal FMAD (4).

FIG. 2A shows a data format recorded on the optical disk by the optical disk recording / reproducing apparatus of the first embodiment shown in FIG. Following an address part (5) preformatted on an optical disk in advance, a synchronizing signal part (6), a fixed pattern part (7), a data part (8) ...
・ It is recorded in the order of

The synchronizing signal section (6) includes a synchronizing signal VF.
O (FIG. 1, 111) is recorded, and the PLL circuit (FIG. 1, 1
14) Used for locking.

In the fixed pattern section (7), a fixed pattern FMA (FIGS. 1 and 2) is always recorded and used to indicate the head of the data signal and synchronize the data signal.

FIG. 2B shows a specific pattern of the fixed pattern FMA. This pattern is a fixed pattern of 7-4-7 in terms of the code inversion interval of 2-7 modulation, and the maximum code inversion interval 7 and the minimum code inversion interval 2 are not adjacent to each other. Also, this 7-4-7 pattern is
This is a violation code of 2-7 modulation.

FIG. 2C shows, as an example, a modulation waveform of a laser when the fixed pattern FMA of this embodiment is actually recorded on a phase-change rewritable optical disk. Data 0 is irradiated with an erasing power (relatively low power) to erase previous data, and data 1 is irradiated with a recording power (relatively high power) to generate recording pits.
The state of the recording pit is shown in FIG.

Next, consider the temperature change of the optical disk medium during recording. The fixed pattern FMA of the present embodiment is a fixed pattern of 7-4-7 in terms of the sign inversion interval. Point A (FIG. 2 (c)), which is the latter half of interval 7, has passed a relatively long time since the recording power was applied, whereas point B (FIG. 2 (c), which is the latter half of interval 4). In c)), since a relatively short time has passed since point A since the recording power was irradiated, the maximum temperature T _{A at} point _{A is} higher than that of point _A.
The highest attained temperature TB at the point _B is higher (T _B >
T _A ). However, the elapsed time after the recording power is applied at point B, which is the latter half of interval 4, is the latter half of interval 2, point F (see FIG. 8) in the conventional fixed pattern portion (FIG. 8, 37). in 8 (c)), longer than the elapsed time from the recording power is irradiated, the highest temperature T _B at the point B, F point lower than the maximum temperature T _F in (FIG. 8 (c)) (T _F > T _B ). Naturally, the temperature is lower than the maximum temperature T _{G at} the conventional point G (FIG. 8C) (T _G > T _F > T _B ). Accordingly, in the present embodiment, the fixed pattern part (7) during recording, but there is a temperature difference T _B -T _A medium, the temperature difference T _B -T _A is a conventional fixed pattern portion (Fig. 8, 37) Temperature difference during recording T _F −
T _E, smaller than the T _G -T _E.

As described above, according to the present embodiment, the fixed pattern has a structure in which the minimum code inversion interval and the maximum code inversion interval are not adjacent to each other. It can reduce the thermal stress on the media, reduce the deterioration of the media,
The number of repetitions can be improved.

In the present embodiment, the case of 2-7 modulation has been described. However, the same effect can be obtained in the case of another modulation method (for example, 4-15 modulation).

In this embodiment, the case where the fixed pattern is used to indicate the head of the data signal and to synchronize the data signal has been described. However, the same effect can be obtained when the fixed pattern is used for other purposes.

FIG. 3 shows a configuration diagram of an optical disk recording / reproducing apparatus according to a second embodiment of the present invention. FIG.
3A shows a recording system, and FIG. 3B shows a reproducing system. Hereinafter, points different from the conventional example of FIG. 7 will be described.

Reference numeral 9 denotes a fixed pattern generation circuit B, which outputs a fixed pattern FMB (10).

Reference numeral 11 denotes a fixed pattern detection circuit B which detects a fixed pattern FMB and outputs a detection signal FMBD (1
Output 2).

FIG. 4A shows a data format recorded on the optical disk by the optical disk recording / reproducing apparatus of the second embodiment shown in FIG. Following an address part (13) preformatted on an optical disk in advance, a synchronization signal part (14), a fixed pattern part (15), and a data part (1)
6) are recorded in this order.

The synchronizing signal section (14) includes a synchronizing signal V
The FO (FIG. 3, 111) is recorded and the PLL circuit (FIG. 3,
115) Used for locking.

A fixed pattern FMB (FIGS. 3 and 10) is always recorded in the fixed pattern section (15), and is used to indicate the head of the data signal and to synchronize the data signal.

FIG. 4B shows a specific pattern of the fixed pattern FMB. This pattern is a fixed pattern of 2-7-2-7 in terms of a 2-7 modulation code inversion interval, and has a maximum code inversion interval 7 and a minimum code inversion interval 2
Are adjacent, and the minimum sign inversion interval 2 is not adjacent. The 7-2 pattern included in the 2-7-2-7 pattern is a 2-7 modulated violation code. FIG. 4C shows, as an example, a laser modulation waveform when the fixed pattern FMB of this embodiment is actually recorded on a phase-change rewritable optical disc. Data 0 is irradiated with an erasing power (relatively low power) to erase previous data, and data 1 is irradiated with a recording power (relatively high power) to generate recording pits. The state of the recording pit is shown in FIG.

Next, the temperature change of the optical disk medium during recording
think of. The fixed pattern FMB of the present embodiment has a sign inversion.
In terms of intervals, a fixed pattern of 2-7-2-7
is there. Point C (FIG. 4 (c)), which is the second half of interval 7, is recorded.
It's been a relatively long time since the power was applied
In contrast, point D (FIG. 4 (c)), which is the latter half of interval 2, is noted.
After the recording power is irradiated, make it relatively shorter than point C.
The maximum temperature T at the point C_CThan
Also, the maximum temperature T at the point D_DIs higher (T _D> T
_C). However, point G in the conventional fixed pattern portion
(FIG. 3C) shows that the recording power is at the minimum sign inversion interval 2
After two short exposures and only a short time
The maximum temperature T at point G_GIs the point D in the present embodiment.
(FIG. 4 (c)) maximum temperature T_DEven higher than
(T_G> T_D). Therefore, in this embodiment, the fixed pattern
The temperature difference T of the medium_D-T_CWhat exists
The temperature difference T_D-T_CIs the conventional fixed pattern part recording
Temperature difference T_G-T_E Smaller than

As described above, according to the present embodiment, the fixed pattern has a structure in which the minimum code inversion interval and the maximum code inversion interval are adjacent and the minimum code inversion interval is not adjacent to each other, so that the fixed pattern section The temperature difference that occurs during recording
It is possible to reduce the thermal stress applied to the medium, suppress the deterioration of the medium, and improve the number of repetitions.

In this embodiment, the case of 2-7 modulation has been described, but the same effect can be obtained in the case of another modulation method (for example, 4-15 modulation).

In the present embodiment, the case where the fixed pattern is used to indicate the head of the data signal and to synchronize the data signal has been described. However, the same effect can be obtained when the fixed pattern is used for other purposes.

FIG. 5 is a block diagram of an optical disk recording / reproducing apparatus according to a third embodiment of the present invention. FIG. 5A shows a recording system, and FIG. 5B shows a reproducing system. Hereinafter, FIG.
The differences from the conventional example will be described.

Reference numeral 17 denotes a fixed pattern generation circuit C, which outputs a fixed pattern FMC (20). Reference numeral 18 denotes a fixed pattern generation circuit D, which outputs a fixed pattern FMD (21). Reference numeral 19 denotes a fixed pattern generation circuit E, which outputs a fixed pattern FME (22).

The fixed patterns FMC, FMD, FM
E is a different pattern. Specifically, 2-
FMC is expressed as 2-7-7 in terms of the sign inversion interval of 7 modulation.
FMD is a pattern of 7-2-7, and FME is a pattern of 7-7-2.

The selector A (23) is connected to the selector (10
When the request of 4) is made, the fixed pattern FMC (2
0), FMD (21), and FME (22) are randomly selected and output.

Reference numeral 24 denotes a fixed pattern detection circuit C which detects a fixed pattern FMC and outputs a detection signal FMCD (2
7) is output. Reference numeral 25 denotes a fixed pattern detection circuit D which detects the fixed pattern FMD and outputs a detection signal FMDD.
(28) is output. Reference numeral 26 denotes a fixed pattern detection circuit E which detects the fixed pattern FME and outputs a detection signal FME.
D (29) is output. An OR circuit 30 performs an OR operation on the detection signals FMCD, FMDD, and FMED and outputs the OR signal as a detection signal FMD '(121'). Therefore, if any one of the fixed patterns FMC, FMD, and FME is detected, the detection signal FMD ′ (121 ′) is output.

FIG. 6A shows a data format recorded on the optical disc by the optical disc recording / reproducing apparatus of the third embodiment shown in FIG. Following an address part (31) preformatted on an optical disk in advance, a synchronization signal part (32), a fixed pattern part (33), and a data part (3)
4) are recorded in this order.

The synchronizing signal section (32) includes a synchronizing signal V
The FO (FIG. 5, 111) is recorded and the PLL circuit (FIG. 5,
115) Used for locking.

In the fixed pattern section (33), a fixed pattern randomly selected from the fixed patterns FMC, FMD and FME is recorded, and is used for indicating the head of the data signal and for synchronizing the data signal. .

Next, the state of the fixed pattern portion when repeated recording is performed will be described. FIG. 6B shows a specific pattern of the fixed pattern portion 33 at the time of the first recording. At this time, a pattern of FMC is selected, and if expressed by a code inversion interval of 2-7 modulation, a fixed pattern of 2-7-7 is recorded.

FIG. 6C shows the first fixed pattern FM.
C shows a laser modulation waveform when actually recording C on a phase change rewritable optical disk. Data 0 is irradiated with an erasing power (relatively low power) to erase previous data, and data 1 is irradiated with a recording power (relatively high power) to generate recording pits. The state of the recording pit is shown in FIG.

FIG. 6E shows the maximum temperature distribution of the medium when recording the fixed pattern FMC. The average temperature of the first half of the fixed pattern portion becomes higher because the recording power is irradiated at the minimum sign inversion interval 2, and the average temperature of the middle half and the latter half becomes lower than that of the first half.

FIG. 6F shows a specific pattern of the fixed pattern portion 33 at the time of the second recording. At this time, FM
If the pattern D is selected and expressed by the code inversion interval of the 2-7 modulation, the fixed pattern 7-2-7 is recorded.

FIG. 6G shows a modulation waveform of a laser when the second fixed pattern FMD is actually recorded on a phase-change rewritable optical disk. Data 0 is irradiated with an erasing power (relatively low power) to erase previous data, and data 1 is irradiated with a recording power (relatively high power) to generate recording pits. The state of the recording pit is shown in FIG.

FIG. 6 (i) shows the maximum temperature distribution of the medium at the time of the second fixed pattern FMD recording. This time, the average temperature of the middle half of the fixed pattern portion becomes higher because the recording power is irradiated at the minimum code inversion interval 2,
The average temperature in the first and second half is lower than in the middle.

FIG. 6J shows a specific pattern of the fixed pattern section 33 at the time of the third recording. At this time, FM
If the pattern E is selected and expressed by the code inversion interval of the 2-7 modulation, the fixed pattern 7-7-2 is recorded.

FIG. 6 (k) shows a modulation waveform of a laser when the second fixed pattern FME is actually recorded on a phase-change rewritable optical disk. Data 0 is irradiated with an erasing power (relatively low power) to erase previous data, and data 1 is irradiated with a recording power (relatively high power) to generate recording pits. The state of the recording pit is shown in FIG.

FIG. 6 (m) shows the maximum temperature distribution of the medium during the third fixed pattern FME recording. This time, the average temperature in the latter half of the fixed pattern portion becomes higher because the recording power is irradiated at the minimum code inversion interval 2,
The average temperature in the first half and the middle half is lower than in the second half.

As described above, there is a high probability that the location where the temperature becomes high changes in each recording, such as the first half, the second half, the third half, and the second half.

As described above, according to the present embodiment, for each recording, one fixed pattern is randomly selected from different fixed patterns and recorded, whereby the same location in the fixed pattern portion is always kept at a high temperature. Probability is low,
Since thermal stress can be dispersed, fatigue of the medium can be reduced, and the number of recording / reproducing repetitions can be improved.

In this embodiment, an example in which three types of fixed patterns are selected has been described. However, if two or more types of fixed patterns are selected, the probability that the same fixed pattern is recorded each time is as follows. Because it is smaller than before,
Similar effects can be obtained.

Further, in this embodiment, the case of 2-7 modulation has been described, but the same effect can be obtained in the case of another modulation method (for example, 4-15 modulation).

Further, in the present embodiment, the case where the fixed pattern is used to indicate the head of the data signal and to synchronize the data signal has been described, but the same effect can be obtained when used for other purposes.

[0072]

As described above, the present invention uses a data format having a fixed pattern portion composed of a data pattern in which the minimum code inversion interval and the maximum code inversion interval are not adjacent to each other, so that the data format is always recorded on an optical disk. Since the generated temperature difference can be made smaller than before, thermal stress applied to the medium is reduced, deterioration is suppressed, and the number of repetitions is improved.

Further, according to the present invention, recording is performed by using a data format having a fixed pattern portion composed of a data pattern in which the minimum code inversion interval is adjacent to the maximum code inversion interval and the minimum code inversion intervals are not adjacent to each other. Since the temperature difference that always occurs can be made smaller than before, the thermal stress applied to the medium is reduced, deterioration is suppressed, and the number of repetitions is improved.

Further, the present invention employs a data format having a fixed pattern portion constituted by randomly selecting one data pattern for each recording from a plurality of different data patterns, so that the same fixed pattern is recorded for each recording. Is reduced, and thermal stress can be prevented from always being applied to the same place as much as possible. Therefore, thermal stress is dispersed, deterioration is suppressed, and the number of repetitions is improved.

[Brief description of the drawings]

FIG. 1A is a configuration diagram of a recording system of an optical disc recording / reproducing apparatus according to a first embodiment of the present invention; FIG. 1B is a diagram showing a reproducing system of the optical disc recording / reproducing apparatus of the first embodiment of the present invention; Diagram

2A is a diagram showing a data format of an optical disk according to a first embodiment of the present invention; FIG. 2B is a diagram showing a fixed pattern according to the first embodiment of the present invention; FIG. 4D shows a laser modulation waveform when recording a fixed pattern according to the first embodiment. FIG. 5D shows recording pits when recording a fixed pattern according to the first embodiment of the present invention. FIG. 10 is a diagram showing a maximum temperature change at the time of recording a fixed pattern according to the first embodiment;

FIG. 3A is a configuration diagram of a recording system of an optical disc recording / reproducing apparatus according to a second embodiment of the present invention; FIG. 3B is a diagram of a reproducing system of the optical disc recording / reproducing apparatus of the second embodiment of the present invention; Diagram

FIG. 4A is a diagram showing a data format of an optical disc according to a second embodiment of the present invention; FIG. 4B is a diagram showing a fixed pattern according to the second embodiment of the present invention; FIG. 4D shows a laser modulation waveform when recording a fixed pattern according to the second embodiment. FIG. 4D shows recording pits when recording a fixed pattern according to the second embodiment of the present invention. The figure which showed the maximum temperature change at the time of fixed pattern recording of Example 2

FIG. 5A is a configuration diagram of a recording system of an optical disc recording / reproducing apparatus according to a third embodiment of the present invention; FIG. 5B is a diagram showing a reproducing system of the optical disc recording / reproducing apparatus of the third embodiment of the present invention; Diagram

FIG. 6A is a configuration diagram of a data format of an optical disc according to a third embodiment of the present invention. FIG. 6B is a diagram showing a first fixed pattern according to the third embodiment of the present invention. FIG. 9D shows a laser modulation waveform at the time of recording a first fixed pattern according to the third embodiment of the present invention. FIG. 10D shows recording pits at the time of recording the first fixed pattern according to the third embodiment of the present invention. FIG. 7E shows the maximum temperature change at the time of recording the first fixed pattern according to the third embodiment of the present invention. FIG. 7F shows the second fixed pattern according to the third embodiment of the present invention. (G) shows a laser modulation waveform at the time of recording a second fixed pattern according to the third embodiment of the present invention. (H) shows a laser modulation waveform at the time of recording the second fixed pattern according to the third embodiment of the present invention. (I) showing the recording pit of FIG. 7 shows the maximum temperature change at the time of recording the second fixed pattern of the third embodiment of the present invention. FIG. 7J shows a third fixed pattern according to the third embodiment of the present invention. FIG. 7K shows a laser modulation waveform at the time of recording the third fixed pattern according to the third embodiment of the present invention. FIG. 3 (l) shows recording pits during recording of a third fixed pattern according to the third embodiment of the present invention. FIG. 4 (m) shows recording pits during recording of a third fixed pattern according to the third embodiment of the present invention. Diagram showing maximum temperature change

7A is a configuration diagram of a recording system of a conventional optical disk recording / reproducing apparatus, and FIG. 7B is a configuration diagram of a reproducing system of a conventional optical disk recording / reproducing apparatus.

8A is a configuration diagram of a data format of a conventional optical disk. FIG. 8B is a diagram showing a conventional fixed pattern. FIG. 8C is a diagram showing a laser modulation waveform when recording a conventional fixed pattern. Is a diagram showing recording pits at the time of recording a conventional fixed pattern.

[Explanation of symbols]

 Reference Signs List 1 fixed pattern generation circuit A 2 fixed pattern FMA 3 fixed pattern detection circuit A 4 detection signal FMAD 9 fixed pattern generation circuit B 10 fixed pattern FMB 11 fixed pattern detection circuit B 12 detection signal FMBD 17 fixed pattern generation circuit C 18 fixed pattern generation Circuit D 19 Fixed pattern generation circuit E 20 Fixed pattern FMC 21 Fixed pattern FMD 22 Fixed pattern FME 24 Fixed pattern detection circuit C 25 Fixed pattern detection circuit D 26 Fixed pattern detection circuit E 27 Detection signal FMCD 28 Detection signal FMDD 29 Detection signal FMED 106 semiconductor laser 107 optical disk 113 photodetector

Claims (10)

(57) [Claims] The minimum code inversion interval of 1. A recording code and the maximum code inversion interval is characterized by recording a fixed pattern portion for synchronization of the configuration data signal in the data pattern not Tonariawa the track direction Optical disc recording method. 2. A record minimum code inversion interval of a recording code and the maximum code inversion interval generates recording data having a fixed pattern portion for synchronization of the configuration data signal in the data pattern not Tonariawa the track direction An optical disk recording / reproducing apparatus comprising a data generating circuit. 3. The minimum code inversion interval and the maximum code inversion interval of a recording code are adjacent in the track direction, and the minimum code inversion is
Optical disk recording method characterized by rolling record fixed pattern portion for synchronization interval and minimum code and inversion interval is configured by the data pattern not Tonariawa the track direction data signals. 4. A minimum code inversion interval of a recording code and the maximum code inversion interval Tonariai the track direction, and, the minimum code counter
A recording data generating circuit for generating recording data having a fixed pattern portion for synchronizing a data signal composed of a data pattern in which the reverse interval and the minimum sign inversion interval are not adjacent to each other in the track direction. Recording / reproducing apparatus for optical discs. 5. A method according to claim 1, wherein:
Was constructed by selecting one of the data patterns for each recording, the recording method of the optical disc, wherein the this <br/> for recording fixed pattern portion for synchronizing data signals. 6. A plurality of different data patterns,
Was constructed by selecting one of the data patterns for each recording, a recording data generating circuit for generating recording data having a fixed pattern portion for synchronizing the data signal, it either is detected among the plurality of data patterns An optical disk recording / reproducing apparatus, comprising: a data reproducing circuit capable of reproducing data by regarding the data as a fixed pattern portion. 7. A recording data generating circuit, a selector to pick a plurality of data pattern generation circuit for generating different data patterns respectively, a plurality of data patterns sac Chi one pattern output from said plurality of data pattern generator 7. The optical disk recording / reproducing apparatus according to claim 6, comprising: 8. The optical disk recording / reproducing apparatus according to claim 6, wherein the data reproducing circuit includes a plurality of data pattern detection circuits for detecting the plurality of data patterns, respectively. 9. An address obtained by preformatting address information.
Fixed pattern for synchronizing dress part and data signal
The fixed pattern part for recording data and the data signal
And a data section for recording, wherein the fixed pattern comprises:
The minimum and maximum sign inversion intervals of the recording code
Note that the data patterns are not adjacent in the rack direction.
Optical disk to be used. 10. The address information is preformatted.
Fixed pattern for synchronizing address part and data signal
Pattern and a data signal.
A data portion for recording, wherein the fixed pattern is
The minimum sign inversion interval and the maximum sign inversion interval are in the track direction.
And the minimum sign inversion interval and the minimum sign inversion interval
Are data patterns that are not adjacent in the track direction.
An optical disk characterized by the following.