JPH08339543A - Optical disk having pattern for evaluating disk - Google Patents

Abstract

PURPOSE: To obtain an optical disk capable of optimizing the characteristics of reproduced signals even at the time of occurrence of relative inclination of a reproducing surface and an objective lens by recording prescribed test pattern data on a test pattern region. CONSTITUTION: This optical disk is provided with the test pattern region exclusive of a data recording region 28. The test pattern in which the shortest pit strings in which the combinations of the shortest pits and the longest non-pits are repeated, the longest pit strings in which the combinations of the longest pits and the longest non-pits are repeated, and prescribed pit strings in which the combinations of the pits having the prescribed pit length between the shortest pit length mT and the longest pit length nT (T: a channel pit length, (n) and (m): integer) and the corresponding non-pits are repeated, are arranged, are recorded in this test pattern region. The test pattern region is formed in at least either of the region part 29A which is off the lead-in region 27 of the optical disk 10 and on the inner side in contact with the region 27 and the region part 29B which is off the lead-out region 26 and on the outer side in contact with the region 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc, a recording method and a data recording device for recording data on the optical disc, a data reproducing method and a data reproducing device for reproducing data from the optical disc, and more particularly to detecting a tilt amount. Optical disc on which possible detection signal is recorded, recording method and data recording device for recording tilt amount detection signal together with data on this optical disc, and data reproducing method and data reproducing device for detecting tilt amount detection signal from optical disc and reproducing data Regarding

The present invention also relates to an optical disc having an evaluation test pattern, a recording method and a data recording device for recording reproduction data together with the evaluation test data on the optical disc, a method for reading the evaluation data from the optical disc and evaluating the optical disc. The present invention relates to an apparatus, in particular, an optical disk on which an evaluation test pattern capable of determining the quality of a manufactured optical disk is recorded, a recording method for recording the evaluation test pattern on the optical disk together with reproduction data, the apparatus, and an evaluation test pattern signal from the optical disk. The present invention relates to a method and an apparatus for determining whether a manufactured optical disc is good or bad.

[0003]

2. Description of the Related Art In an optical disc device that optically reproduces information, which is a type of information recording / reproducing device, the frequency characteristic of a reproduced signal deteriorates as the relative tilt amount between the disc reproducing surface and the objective lens surface increases. Finally, it is known that the error rate at the time of data read deteriorates. It is said that this relative tilt amount is determined by the tilt caused by the physical warp of the disk and the tilt caused by the physical tilt of the objective lens of the optical head.

Conventionally, in order to solve such a problem, a method of mechanically tilting the optical head to eliminate the relative tilt between the disk reproducing surface and the objective lens surface is disclosed in, for example, Japanese Unexamined Patent Publication (Kokai) No.
It is known to -1472323 etc. This conventional device
The optical pickup is tiltably supported, and has a structure in which it is mechanically connected to a motor as a tilt source via a gear. In such a device, the tilt amount of the disc is detected, and accordingly, the motor is rotated and the optical pickup is tilted via the gear to control the relative tilt amount between the objective lens and the optical disc. There is. It is said that such a control system removes the relative tilt between the disc reproducing surface and the objective lens surface.

[0005]

In a device employing such a conventional control method, mechanical components such as a motor and a gear intervene in the control system, so that tilt correction control in a high band is difficult and DC There is a problem that tilt correction can be performed only in the control band near the component, and it is difficult to downsize the device because mechanical components are used. In particular, as optical discs capable of recording high-density and high-density information are being developed today, tilt correction of the DC component region is not sufficient for reproducing information, and not only the DC component region but also high band It is desired to develop a method capable of accurately correcting tilt.

Further, in an optical disc device which optically reproduces data, which is a kind of information recording / reproducing device, it is a prerequisite that the data is recorded with high precision on the optical disc to reproduce the data with high precision. . For example, if the moldability of the pits formed on the optical disk is poor, it goes without saying that the reproduction signal is not reproduced from the pits with high accuracy, in other words, with a low error rate, and data cannot be reproduced. Is expected. Similarly, if the frequency characteristics of the reproduced signal of the reproduced signal deteriorate, the error rate during data read will eventually deteriorate, and if the crosstalk component from the adjacent pit row is large, the pit row will be the search target. It is known that search data cannot be obtained.

It has been desired to develop a method of highly accurately judging the quality of an optical disc manufactured in the past, but in the case of an optical disc having a relatively small storage capacity, if the recorded data is confirmed by an actual reproducing system, It is said that it is sufficient for judging the quality of data recording. However, as optical discs capable of recording high-density and high-density information are being developed, it is required to judge the quality of data recording with higher accuracy, and development of such a method is desired. .

The present invention has been made in view of the above circumstances, and a first object thereof is to:

[0009]

According to the present invention, when the channel pit length is T and n and m are integers, the pit has the shortest pit length (mT), the longest pit length (nT), and the shortest pit length (nT). mT) and the longest pit length (nT), the non-pit has the shortest non-pit length (* mT), the longest non-pit length (* nT), and the shortest non-pit length (* mT). And longest non-pit length (* nT)
A data area having any of the predetermined non-pit lengths between which the data is recorded in the arrangement of the pits and the non-pits, and the combination of the shortest pit and the shortest non-pit provided outside the data area. A repeated shortest pit string, a longest pit string in which the combination of the longest pit and the longest non-pit is repeated, a pit having a predetermined pit length between the shortest pit length (mT) and the longest pit length (nT), and a non-corresponding non-pit. There is provided an optical disc having a test pattern area in which a test pattern in which a predetermined pit row in which pit combinations are repeated is recorded.

Further, according to the present invention, a data area in which pits and non-pits are arranged according to recording data and a test pattern and data in which the pits and non-pits are arranged based on a predetermined arrangement rule are reproduced signals. Read-out means for optically reading, a detecting means for detecting a correction coefficient unique to the device from the reproduction signal read out from the test pattern, and the reproduction signal read out from the data area by the correction coefficient. There is provided an optical disk reproducing device including a correction unit.

Further, according to the present invention, a data area in which pits and non-pits are arranged according to recording data and a test pattern and data in which the pits and non-pits are arranged based on a predetermined arrangement rule are recorded from an optical disc. A step of optically reading out as a reproduction signal, a step of detecting a correction coefficient unique to the apparatus from the reproduction signal read out from the test pattern, and a step of correcting the reproduction signal read out from the data area with this correction coefficient A method for reproducing an optical disc is provided, which comprises the steps of:

Furthermore, according to the present invention, when the channel pit length is T and n and m are integers, the pits are the shortest pit length (mT), the longest pit length (nT) and the shortest pit length (mT). It has any of the predetermined pit lengths between the longest pit length (nT), and the non-pits are the shortest non-pit length (* mT), the longest non-pit length (* nT), the shortest non-pit length (* mT), and the longest non-pit length. A data conversion step of converting data to be recorded into pit data corresponding to an array of the pits and the non-pits, which has a predetermined non-pit length between the pit lengths (* nT), and the shortest pit and the shortest pit. Shortest pit string in which non-pit combinations are repeated, longest pit string in which the longest pit and longest non-pit combination are repeated, and shortest pit length (mT) and longest pit length (nT) A step of generating a test signal corresponding to a test pattern in which a combination of a pit having a predetermined pit length and a non-pit corresponding to the pit is repeated, and the pit data is stored in a data area of the optical disc. A method of recording data on an optical disc, comprising: recording the test signal in a test pattern area different from the data area of the optical disc as an array of pits and non-pits.

Further, according to the present invention, when the channel pit length is T and n and m are integers, the pits are the shortest pit length (mT), the longest pit length (nT) and the shortest pit length (mT). It has any of the predetermined pit lengths between the longest pit length (nT), and the non-pits are the shortest non-pit length (* mT), the longest non-pit length (* nT), the shortest non-pit length (* mT), and the longest non-pit length. Data conversion means for converting data to be recorded into pit data corresponding to the arrangement of the pits and the non-pits, which has a predetermined non-pit length between the pit lengths (* nT), and the shortest pit and the shortest pit. The shortest pit string in which a combination of non-pits is repeated, the longest pit string in which the combination of the longest pit and the longest non-pit is repeated, and the shortest pit length (mT) and the longest pit length (nT) A pit having a predetermined pit length and a non-pit combination corresponding to the pit, and a test signal generating means for generating a test signal corresponding to a test pattern in which a predetermined pit row is arranged; Provided is a recording device for recording data on an optical disc, which comprises recording means for recording the test signal in a region and a test pattern region different from the data region of the optical disc as an array of pits and non-pits.

In the above-mentioned optical disc, even if a relative inclination occurs between the optical disc reproduction surface and the objective lens, the reproduction signal can be optimized by the correction coefficient according to the amount. Therefore, the frequency characteristic of the reproduction signal is always optimized, and the reproduction signal characteristic can be improved. Therefore, finally, the error rate at the time of data read can be improved. Further, according to the present invention, when the channel pit length is T and n and m are integers, the pit has the shortest pit length (mT), It has either the longest pit length (nT) or a predetermined pit length between the shortest pit length (mT) and the longest pit length (nT), and the non-pits are the shortest non-pit length (* mT) and the longest non-pit length (* nT) and a predetermined non-pit length between the shortest non-pit length (* mT) and the longest non-pit length (* nT), and a data area in which data is recorded in this pit and non-pit array. And a pit which is provided outside the data area and is selected from the shortest pit, the shortest non-pit, and a pit having a predetermined pit length between the shortest pit length (mT) and the longest pit length (nT). Optical disc comprising a test pattern region where the test pattern for the test pattern according to a combination of non-pits corresponding to the pits determines a recording state of the optical disc which is recorded is formed, is provided.

Further, according to the present invention, a test is performed from an optical disc having a data area in which pits and non-pits are arranged according to recording data and a test pattern in which the pits and non-pits are arranged based on a predetermined arrangement rule. There is provided an optical disc evaluation apparatus including: a reading unit that optically reads a pattern and data as a reproduction signal; and a detection unit that detects evaluation data specific to the optical disc from the reproduction signal read from the test pattern. .

Further, according to the present invention, a test is performed from an optical disc having a data area in which pits and non-pits are arranged according to recording data and a test pattern in which the pits and non-pits are arranged based on a predetermined arrangement rule. A reading step of optically reading the pattern and the data as a reproduction signal, a detection step of detecting evaluation data specific to the optical disk from the reproduction signal read from the test pattern, and a step of judging the quality of the optical disk from the evaluation data. An optical disc evaluation method comprising:

Furthermore, according to the present invention, when the channel pit length is T and n and m are integers, the pits are the shortest pit length (mT), the longest pit length (nT), and the shortest pit length (mT). Has any of the predetermined pit lengths between the longest pit length (nT), and the non-pits are the shortest non-pit length (* mT), the longest non-pit length (nT) and the shortest non-pit length (* mT) and the longest non-pit. A data conversion step of converting data to be recorded into pit data corresponding to the arrangement of the pits and the non-pits, which has any of the predetermined non-pit lengths (* nT), and is provided outside the data area. Selected from the shortest pit and the shortest non-pit, and a pit having a predetermined pit length between the shortest pit length (mT) and the longest pit length (nT), and a non-pit corresponding to this pit. Generating a test signal corresponding to a test pattern related to the combination, and recording the pit data in a data area of the optical disc and the test signal in a test pattern area different from the data area of the optical disc as an array of pits and non-pits A recording method for recording data on an optical disc comprising the steps of:

Furthermore, according to the present invention, when the channel pit length is T and n and m are integers, the pits are the shortest pit length (mT), the longest pit length (* nT) and the shortest pit length (mT). And the predetermined pit length between the longest pit length (nT) and the non-pit is the shortest non-pit length (* mT), the longest non-pit length (* nT), the shortest non-pit length (* mT), and the longest. Data conversion means for converting data to be recorded into pit data corresponding to the arrangement of the pits and the non-pits, which has any of the predetermined non-pit lengths between the non-pit lengths (* nT), and outside the data area. A pit selected from the shortest pit and the shortest non-pit and a pit having a predetermined pit length between the shortest pit length (mT) and the longest pit length (nT), and a non-pit corresponding to this pit. Test signal generating means for generating a test signal corresponding to a test pattern associated with the combination of the test pattern, the pit data in a data area of the optical disc, and the test signal in a test pattern area different from the data area of the optical disc. There is provided a recording device for recording data on an optical disc, which comprises recording means for recording as an array of.

In the above-mentioned optical disk, the formability of the pits is judged by detecting the reproduced signals from the pit train of the shortest pit and the shortest non-pit and the pit train of the longest pit and the longest non-pit and evaluating the signals. be able to. In addition, a pit string (nT ++ n) in which pits having the longest pit length (nT) and non-pits are repeated
T), a pit having the shortest pit length (mT) and a pit sequence in which non-pits are repeated (mT ++ mT) and the shortest pit length sequence (mT ++ mT) to a predetermined pit length sequence (mT +)
* MT), and in the meantime, the pit lengths (m + 1) T, (m + 2) T,
A pit string [(m + 1) T ++ (m in which pits having (m + 4) T and (m + 8) T and non-pits are repeated.
+1) T], [(m + 2) T ++ (m + 2) T],
[(M + 4) T ++ (m + 4) T] and [(m + 8) T
The frequency characteristic of the reproduced signal can be evaluated by the reproduced signal from the test pattern having + * (m + 8) T]. Furthermore, the shortest pit length sequence (mT + * mT) is repeated over the entire circumference of the optical disc, and the pit length sequence [(m + 1) T + is formed as a track adjacent to the shortest pit length sequence (mT + * mT) corresponding to the center track. * (M + 1)
T] and pit length string [(m + 2) T ++ * (m + 2) T]
It is possible to evaluate the crosstalk characteristic of the reproduced signal by the reproduced signal from the test pattern that is repeated over the entire circumference of the optical disc.

According to the present invention, the channel pit length is T, and pits and lands related to this integer multiple, where 3 <n <m <k, and n, m, and k are integers, The pit has one of the shortest pit length (3T), the longest pit length (kT), and the pit length between the shortest pit length (3T) and the longest pit length (kT), and the non-pit has the shortest non-pit length * 3T, It has either the longest non-pit length (* kT) or the shortest non-pit length * 3T and the longest non-pit length (* kT) non-pit length, and data is recorded in this pit and non-pit arrangement combination. Data area, and a length of 3T, m provided outside this data area.
Pit having one pit length of T, nT, length 3T, land having another one land length of mT, nT, remaining one pit length of length 3T, mT, nT A pit having a length of 3T, a land having a length of one of mT, nT, a pit having a length of another pit having a length of 3T, mT, nT, and a remaining length of mT, nT. An optical disc having a test pattern area in which a repeating array of pit lands selected from lands having one land length is recorded.

Further, according to the present invention, a test is performed from an optical disk having a data area in which pits and non-pits are arranged according to recording data and a test pattern in which the pits and non-pits are arranged based on a predetermined arrangement rule. Read-out means for optically reading the pattern and data as a reproduction signal, detection means for detecting an error rate of the reproduction signal read from the test pattern, and correction of the reproduction signal so as to minimize the error rate. There is provided an optical disk reproducing device including a correction unit.

Further, according to the present invention, an optical disc having a data area in which pits and non-pits are arranged according to recording data and a test pattern in which the pits and non-pits are arranged based on a predetermined arrangement rule. From the data area so as to minimize the error rate, and the step of optically reading the test pattern and the data as a reproduction signal from the data pattern, the step of detecting the error rate from the reproduction signal read from the test pattern, A method for reproducing an optical disc is provided, which comprises the step of correcting the reproduced signal that is output.

Furthermore, according to the present invention, the optical disc has pits and lands each having a channel pit length of T and an integer multiple of T, and 3 <n <m <k,
If n, m, and k are integers, the pit has the shortest pit length (3
T), longest pit length (kT) and shortest pit length (3
T) and the longest pit length (kT), and the non-pit is the shortest non-pit length * 3T, the longest non-pit length (* kT) and the shortest non-pit length * 3T and the longest non-pit length. Having any of the non-pit lengths between (* kT),
A data area in which data is recorded by a combination of the arrangement of pits and non-pits, and a pit provided outside the data area and having a certain pit length of 3T, mT, and nT, a length of 3T , MT, nT, the other land length of 1T, length 3T, mT, nT of the remaining one pit length, 3T, mT,
Land with a land length of nT, length 3
A test pattern area in which a repetitive array of pit lands selected from pits having another pit length of T, mT, nT and lands having one remaining land length of mT, nT is recorded; , A method of reproducing an optical disc is provided.

Further, according to the present invention, the repetition of the pits and lands is m = 6 and n = 7 and 3T-
* 6T-7T- * 3T- * 6T-7T, 3T-7T-6
T-3T-7T-6T, 6T-3T-7T-6T-3T
-7T, 7T-3T-6T-7T-3T-6T, 6T-
7T-3T-6T-7T-3T, 7T-6T-3T-7
The optical disc reproducing method according to claim 91, comprising one selected from the group of T-6T-3T.

According to the present invention, the channel pit length is T, and the pits and lands are integer multiples thereof, and 3 <n <m <k, where n, m, and k are integers. Has the shortest pit length (3T), the longest pit length (kT), and the pit length between the shortest pit length (3T) and the longest pit length (kT), and the non-pits are the shortest non-pit length * 3T and the longest. The pit data has a non-pit length (* kT) and a non-pit length between the shortest non-pit length * 3T and the longest non-pit length (* kT). A data conversion step of converting data to be recorded, and a pit provided outside this data area and having a pit length of one of 3T, mT, and nT, and another of 3T, mT, and nT. Having a land length of 1 Land, length 3T, mT,
Pit with one remaining pit length of nT, length 3
A land having a land length of one of T, mT, and nT, a pit having a pit length of another one of 3T, mT, and nT and a remaining land length of one of mT and nT. A recording method for recording data on an optical disc having a step of recording as a repetitive array of pit lands selected from a land is provided.

Further, according to the present invention, the channel pit length is T, and pits and lands related to this integer multiple, where 3 <n <m <k, and n, m, and k are integers, The pit has one of the shortest pit length (3T), the longest pit length (kT), and the pit length between the shortest pit length (3T) and the longest pit length (kT), and the non-pit has the shortest non-pit length * 3T, Pit data having the longest non-pit length (* kT) and the non-pit length between the shortest non-pit length * 3T and the longest non-pit length (* kT) and corresponding to the combination of this pit and non-pit arrangement. Data conversion means for converting the data to be recorded in the pit, and a pit provided outside the data area and having a pit length of one of the lengths 3T, mT, nT, among the lengths 3T, mT, nT The other 1 land length Land to have, length 3T, mT,
Pit with one remaining pit length of nT, length 3
A land having a land length of one of T, mT, and nT, a pit having a pit length of another one of 3T, mT, and nT and a remaining land length of one of mT and nT. There is provided a recording device for recording data on an optical disc, which comprises recording means for recording as a repetitive array of pit lands selected from lands.

[0027]

DETAILED DESCRIPTION OF THE INVENTION An optical disk and an optical disk reproducing apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a block of an optical disc reproducing apparatus for reproducing data from an optical disc according to an embodiment of the present invention, and FIG. 2 shows a block of a disc drive section for driving the optical disc shown in FIG. 3 and 4 show the structure of the optical desk shown in FIGS. 1 and 2.

As shown in FIG. 1, the optical disk reproducing apparatus is
Key operation / display unit 4, monitor unit 6 and speaker unit 8
Is provided. Here, the user operates the key operation / display unit 4
The recorded data is reproduced from the optical disc 10 by operating the. The recording data includes video data, sub-video data and audio data, which are converted into a video signal and an audio signal. The monitor section 6 displays an image by a video signal, and the speaker section 8 generates a sound by an audio signal.

As already known, the optical disc 10 has various structures. As the optical disc 10, for example, as shown in FIG. 3, there is a read-only disc on which data is recorded at high density. As shown in FIG. 3, the optical disc 10 comprises a pair of composite layers 18 and an adhesive layer 20 interposed between the composite disc layers 18. Each composite disk layer 18 is composed of a transparent substrate 14 and a recording layer, that is, a light reflection layer 16. The disc layer 18 is arranged so that the light reflection layer 16 contacts the adhesive layer 20. The optical disc 10 is provided with a central hole 22, and a clamping area 2 for holding the optical disc 10 at the time of rotation is provided around the central hole 22 on both sides thereof.
4 are provided. When the disc 10 is loaded into the optical disc device, the spindle of the spindle motor 12 shown in FIG. To be done.

As shown in FIG. 3, the optical disc 10 is surrounded by the clamping areas 24 on both sides thereof.
It has an information area 25 in which information can be recorded. Each information area 25 is defined as a lead-out area 26 where information is not normally recorded in its outer peripheral area, and a lead-in area 27 where information is not normally recorded in its inner area that contacts the clamping area 24. In addition,
A data recording area 28 is defined between the lead-out area 26 and the lead-in area 27. The data recording area 28 has a predetermined logical format defined as a standard peculiar to this optical disc. For details, see European Patent Application No. 96101282.0, filed Janurary.
30, 199, Kikuchi et. Al. See the specification for details of the logical format.

As shown in FIG. 4, both or at least an outer area portion 29B outside the lead-out area 26 and in contact with the area 26 and an inner area portion 29A outside the lead-in area 27 and in contact with the area 27 are provided. On the one hand,
As an example of a test pattern for evaluating the pit string formed on the optical disk 10, the following four groups of pit strings are formed. The test patterns of the four groups are recorded in the lead-in area 27 when they are recorded on the optical disc as evaluation data from an external signal generator separately from the reproduction target data such as video data as described later.
An inner area portion 29A that is outside and contacts the area 27
Recorded in. However, when the evaluation data is provided at the head of the reproduction target data such as video data and the evaluation data and the reproduction target data are recorded subsequently thereto, the evaluation data may be recorded in the lead-in area 27. The evaluation data of the 3T-6T-7T pattern is recorded in the lead-in area 27 as described later with reference to FIGS. 14A, 14B and 15 as another embodiment.

In the description of the pit string corresponding to the test pattern of 4 groups, T represents the channel bit length, n and m are integers, (□ T) is the pit length and (* □ T) is , Represents the non-pit length corresponding to the interval between adjacent pits. Here, in the reproducing apparatus shown in FIGS. 1 and 2, the rotation speed of the optical disc 10 is changed depending on the position in the radial direction, and the track is scanned with the light beam at a constant linear velocity. Constant Li
Since it is a near velocity type, the pit length is nT,
Each mT is formed with a constant length from the inner circumference to the outer circumference of the optical disc 10.

(A) First group of the longest pit length sequence as a pit sequence (nT + * nT) in which pits having the longest pit length (nT) and non-pits are repeated as shown in FIG. 5 (A) (b) The shortest pit length (m
Second group of the shortest pit length sequence as a pit sequence (mT + * mT) in which pits having T) and non-pits are repeated (c) From the shortest pit length sequence (mT + * mT) to a predetermined pit length sequence [(m + 8) T + * (M + 8) T], and in the meantime, there is no relationship of multiples between them. Group: [(mT ++ mT)] [p repetitions] [(m + 1) T ++ (m + 1) T] [q repetitions] [(m + 2) T ++ (m + 2) T] [r repetitions Repetition] [(m + 4) T ++ * (m + 4) T] [s times repetition] [(m + 8) T ++ (m + 8) T] [t times repetition] Here, (p>q>r> The relationship of s> t) is established,
It is selected so that the time required to reproduce the p, q, r, s, and t repeated pit trains becomes substantially constant. Also,
[(M + 8) T + (m + 8) T] specifically corresponds to the longest pit string (nT + * nT).

(D) As shown in FIG. 8, the shortest pit length sequence (mT + * mT) is repeated over the entire circumference of the optical disk 10 and is adjacent to the shortest pit length sequence (mT + * mT) corresponding to the center track. The pit length sequence [(m + 1) T ++ * (m + 1) T] is repeated for one track in front of the optical disc 10 as a track to be recorded, and is further adjacent to the shortest pit length sequence (mT + * mT) [( m + 2) T
+ * (M + 2) T] is repeated over the next one turn of the optical disc 10 in the fourth group of the pit length sequence. In the fourth group, as shown in FIG. 8, the pit length sequence [(m + 1) T ++ ( m + 1) T] is an inner track, a pit length string (mT ++ * mT) is a center track, and a pit length string [(m + 2) T ++ (m + 2) T] is an outer track arranged along the radial direction of the optical disc 10. ing. However, instead of the arrangement shown in FIG.
The pit length string [(m + 2) T ++ * (m + 2) T] is the inner track, the pit length string (mT + * mT) is the center track, and the pit length string [(m + 1) T ++ * (m + 1) T] is the outer track. It may be arranged along the radial direction of the optical disc 10.

The pit length strings of the first to fourth groups described above are specifically (m = 3) and (n = 1)
1) corresponds and has the following relationship.

(A) First group: longest pit length (1
1T) pit sequence in which pits and non-pits are repeated (11T ++ 11T) (b) Second group: pit sequence in which pits having the shortest pit length (3T) and non-pits are repeated (3T ++)
3T) (c) Third group: repeating sequence of pit length sequence as shown below (3T + * 3T) [p times repetition] (4T + * 4T) [q times repetition] (6T + * 6T) [Repetition of r times] [Repetition of s times of (7T + * 7T)] [Repetition of t times of (11T + * 11T)] (4T + * 4T), (6T + * 6) as described above.
T) and (7T + * 7T) pit rows are from the shortest pit length row (3T + * 3T) to a predetermined pit length row (11T ++ 1).
1T), and these are not in a multiple relationship.

(D) Shortest pit length string (4T + * 4T)
Is repeated over the entire circumference of the optical disc 10, and the pit length sequence (5T + * 5T) as a track adjacent to this shortest pit length sequence (4T + * 4T) corresponding to the center track extends over the front circumference of the optical disc 10. 4th group of pit length sequences (6T + * 6T) that are repeated over the next one revolution of the optical disk 10 and are adjacent to the shortest pit length sequence (4T + * 4T). As another example, the following pit row may be formed.

(A) The first group of the longest pit length sequence as a pit sequence (nT + * nT) in which pits having the longest pit length (nT) and non-pits are repeated as shown in FIG. 5 (a) (b) The shortest pit length (m
The second group of the shortest pit length sequence as a pit sequence (mT + * mT) in which pits having T) and non-pits are repeated may have the following relationship as another example.

(C) Shortest pit length string (mT + * mT)
To a predetermined pit length string [(m + 14) T ++ (m + 14)
T], and the pit trains in the meantime are not in a multiple relationship. The third group [(mT + * mT) of the repeated pit trains in which the pit trains are arranged as shown below is arranged. [Repetition of p times] [Repetition of q times of [(m + 1) T ++ (m + 1) T]] [Repetition of r times of [(m + 3) T ++ (m + 3) T]] [(m + 7) T ++ * (m + 7) ) T] [s times repeated] [(m + 14) T ++ * (m + 14) T] [t times repeated] Here, the relationship of (p>q>r>s> t) holds,
It is selected so that the time required to reproduce the p, q, r, s, and t repeated pit trains becomes substantially constant. Also,
[(M + 14) T + * (m + 14) T] specifically corresponds to the longest pit string (nT + * nT).

(D) As shown in FIG. 8, the shortest pit length sequence (mT + * mT) is repeated over the entire circumference of the optical disk 10 and is adjacent to the shortest pit length sequence (mT + * mT) corresponding to the center track. The pit length sequence [(m + 1) T ++ * (m + 1) T] as a track is repeated over one round in front of the optical disc 10, and further adjacent to the shortest pit length sequence (mT + * mT), the pit length sequence [(m + 2 ) T
+ * (M + 2) T] is repeated for the next round of the optical disc 10 in the fourth group of pit length sequences. The pit length sequences of the first to fourth groups according to the other example described above are specifically described below. Are (n = 18) and (m =
4) corresponds and has the following relationship.

(A) First group: longest pit length (4
Pit sequence having repeated pits and non-pits having T) (18T ++ 18T) (b) Second group: pit sequence having shortest pit length (4T) and pits having repeated non-pits (4T ++)
4T) (c) Third group: repeating sequence of pit length sequence as shown below (4T + * 4T) [p times repetition] (5T + * 5T) [q times repetition] (7T + * 7T) [Repetition of r times] [Repetition of s times of (11T + * 11T)] [Repetition of t times of (18T + * 18T)] Similarly, (5T + * 5T), (7T + * 7T) and (11
The pit row of T + * 11T is the shortest pit length row (4T +
It corresponds to the range from (* 4T) to the predetermined pit length string (18T + * 18T), and none of these have a multiple relationship.

(D) Shortest pit length string (4T + * 4T)
Is repeated over the entire circumference of the optical disc 10, and the pit length sequence (5T + * 5T) as a track adjacent to this shortest pit length sequence (4T + * 4T) corresponding to the center track extends over the front circumference of the optical disc 10. 5A in which the pit length sequence (6T + * 6T) adjacent to the shortest pit length sequence (4T + * 4T) is repeated over the next one turn of the optical disk 10. When a reflected light beam from the pit row having the longest pit length (nT) of the first group as shown in FIG. 5) is detected and converted into a reproduction signal, a reproduction signal as shown in FIG. 5B is obtained. . Further, when the reflected light beam from the pit having the shortest pit length (mT) of the second group as shown in FIG. 6A is detected and converted into a reproduction signal,
A reproduced signal as shown in FIG. 6B is obtained.

5 (b) and 6 as will be described later.
From the reproduced waveforms of the first and second groups shown in (b), the stamper, that is, the formability of the pits of the optical disc 10 formed from the master is evaluated. When the pit train of the third group is converted into a reproduction signal by a light beam, an MTF (Modulation Transfer Function) signal as shown in FIG. 7 is obtained. In this MTF signal, the smaller the pit length, the smaller the amplitude of the reproduction signal, and the larger the pit length, the larger the amplitude of the reproduction signal. The frequency characteristic of the reproduced signal reproduced from the pit can be evaluated from the MTF signal characteristic shown in FIG.

Further, the pit train of the fourth group is a pit length train (m) corresponding to the center track as shown in FIG.
T + * mT) and pit length sequences [(m + 1) T ++ * (m + 1) T] and [(m + 2) T corresponding to adjacent tracks.
+ * (M + 2) T] is formed, it is possible to evaluate crosstalk from adjacent tracks included in the reproduction signal. Here, the crosstalk amount Ct corresponds to a value obtained by subtracting the amplitude Br of the adjacent track from the amplitude At of the reproduction track (corresponding to the center track) (Ct = Br-At (dB)).

Furthermore, in both or at least one of the lead-out area 26 and the lead-in area 27, a first pit for evaluating a pit string formed on the optical disk 10 is provided.
In addition to the pit rows of groups 4 to 4, a second test pattern for correcting the relative tilt amount between the reproduction surface of the optical disc 10 and the objective lens 34 is formed as a pit row of the fifth group. Has been done. The pit row of the fifth group is the shortest pit row (mT + * mT)
To the longest pit length sequence (nT + * nT), the repeating sequence of each pit sequence is arranged in the order of the pit length.

In the first example of the fifth group, (m = 3,
n = 11), and a pit row having a pit length of 3T to 11T is arranged. Further, as another example of the fifth group, (m = 4, n = 18), and a pit row having a pit length of 4T to 18T is arranged.
In the first example of the fifth group, when the second test pattern is reproduced, FIG. 9A, FIG. 9B, and FIG.
The MTF signal as shown in (c) is reproduced. As will be described later in detail, the relative tilt amount between the reproduction surface of the optical disc 10 and the objective lens 34 is corrected by this MTF signal. As understood from FIG. 9A, the number of repetitions of each pit row is the number of repetitions of the third group (p to t).
Similarly, the time for reproducing the repeated pit train is selected to be substantially constant. In addition, the MTF signal shown in FIG. 9A is a set of signal waveforms for each pit, as is clear from the signal waveforms of FIG. 9B and FIG. 9C showing the enlarged signal waveforms. Has become.

Next, an optical disk reproducing apparatus for reproducing data from such an optical disk 10 will be described with reference to FIGS.
Will be described with reference to. In the optical disc playback device,
The optical disk 10 is searched by the optical beam in the disk drive unit 30 that drives the optical disk. That is, as shown in FIG. 2, the optical disc 10 is placed on a spindle motor 12 driven by a motor drive circuit 11, and is rotated by the spindle motor 12 at a constant linear velocity. Below the optical disc 10, the optical disc 10
An optical head for converging a light beam, namely a laser beam,
That is, the optical pickup 32 is provided. The optical head 32 is mounted on a guide mechanism (not shown) so as to be movable in the radial direction of the optical disk 10 in order to search the information recording area 25, particularly the data recording area 28, and is driven by the drive circuit 37. The feed motor 33 driven by the drive signal moves the optical disk 10 in the radial direction. An objective lens 34 is movably held along the optical axis of the optical disc 10, and is moved in the optical axis direction in response to a drive signal from a focus drive circuit 36, so that the objective lens 34 is always in a focus state. The lens 34 is maintained and a minute beam spot is formed on the recording layer 16. The objective lens 34 is held so that it can be finely moved in the radial direction of the optical disc 10, is finely moved in response to a drive signal from the track drive circuit 38, and is always maintained in a tracking state so that the recording layer 16 of the optical disc 10 is maintained. The upper track is tracked with a light beam.

In the optical head 32, the light beam reflected from the optical disk 10 is detected, and the detected detection signal is supplied from the optical head 32 to the servo processing circuit 44 via the head amplifier 40. The servo processing circuit 44 generates a focus signal, a tracking signal and a motor control signal from the detection signal, and supplies these signals to the drive circuits 36, 38 and 11, respectively. Therefore, the objective lens 34 is maintained in the focus state and the tracking state, the spindle motor 12 is rotated at a predetermined rotation number, and the light beam causes the track on the recording layer 16 to be a light beam, for example, a constant linear velocity. Tracked in. System CP
When a control signal as an access signal is supplied from the U section 50 to the servo processing circuit 44, a movement signal is supplied from the servo processing circuit 44 to the drive circuit 37, and the optical head 32 is moved along the radial direction of the optical disc 10. A predetermined sector of the recording layer 16 is accessed, reproduction data is amplified by the head amplifier 40 and output from the disk drive unit 30. The output reproduction data is stored in the data RAM unit 56 via the system CPU unit 50 and the system processor unit 54 controlled by the program recorded in the system ROM and RAM unit 52. The stored reproduction data is processed by the system processor unit 54 and classified into video data, audio data and sub-picture data, and the video data, audio data and sub-picture data are respectively video decoder unit 58 and audio decoder unit 60. And output to and decoded by the sub-picture decoder unit 62. The decoded video data, audio data, and sub-picture data are converted into a video signal, an audio signal, and a sub-picture signal as an analog signal by the D / A and reproduction processing circuit 64, and are mixed and processed to produce the video signal and the sub-picture. The signal is sent to the monitor 6,
Audio signals are supplied to the speakers 8 respectively. As a result, the video is displayed on the monitor unit 6 and the sound is reproduced from the speaker unit 8.

As described above, in the optical disc reproducing apparatus shown in FIGS. 1 and 2, when the reproducing operation is started,
Both or at least one of the inner area portion 29A outside the lead-in area 27 of the optical disc 10 and in contact with the area 27 and the outer area portion 29B outside the lead-out area 26 and in contact with the area 26 is searched and tilted. For detecting the quantity, the pit row of the fifth group corresponding to the second test pattern is searched and the reproduction signal thereof is read into the data processing circuit 42 of FIG. When the data area 25 is searched in the following manner based on the detected tilt amount, the tilt component included in the reproduction signal is substantially removed.

A tilt correction circuit included in the data processing circuit 42 for this tilt correction is shown in FIG. As described above, the information recorded on the optical disk 10 is read by the optical head 32, and the analog reproduction signal is output to the head amplifier 40. This analog playback signal is
The delay circuits 121 and 12 are amplified by the head amplifier 40.
The signal is supplied to a 5-tap transversal filter 104 composed of 2, 123, and 124, and its signal waveform is corrected as described later and then supplied to the binarization circuit 105. The reproduced signal is binarized in the binarization circuit 105, and the digitized digital reproduced signal is P
The clock is regenerated in the LL circuit 106, the clock-regenerated signal is demodulated in the demodulation circuit 107, and sequentially sent to the data processor 108 for processing.

As described above, the optical disc 101 has the pit row as the second test pattern belonging to the fifth group as shown in FIG. The pit train belonging to is detected. Here, a description will be given of a pit train of 4T to 18T as an example. When 4T to 18T pit trains as test patterns are reproduced one after another, the MTF signal is reproduced,
This MTF reproduction signal is A / D converted by the A / D converter 109. A correction coefficient for correcting the digitized MTF reproduction signal in the system CPU unit 50 so as to have an ideal amplitude characteristic as shown in FIG. 11 for each 4T to 18T pit row related to the second test pattern Is calculated, and this correction coefficient is used for system ROM & R
It is stored in the AM unit 52.

Generally, an optical disc 1 as shown in FIG.
When a relative tilt between the optical disk 10 and the optical head 32, for example, a tilt angle θrad occurs during the rotation of 0,
As shown by the solid line in FIG. 12, the level of the reproduced signal is periodically attenuated. By multiplying the reproduction signal from the pit row to be corrected by a correction coefficient for correcting this level of attenuation, an ideal signal waveform as shown by the broken line in FIG. 12 can be obtained. That is, the system CPU unit 5
At 0, the digitized MTF reproduction signal of the second test pattern, a part of which is attenuated by tilt, is an ideal reference signal level for each pit train,
That is, it is compared with the amplitude and the difference is obtained. When the actual signal level for each pit string matches the reference signal level, the correction coefficient is set to 1. If there is a difference between the two, the actual signal level is multiplied to obtain the reference level. The correction coefficient is determined. This correction coefficient is obtained for each pit row of 4T to 18T, and is stored in the system ROM & RAM section 52 as a tilt correction coefficient unique to the optical disc 10 loaded in the reproducing apparatus, that is, as the frequency characteristic of the reproducing system. .

This tilt correction coefficient may be determined by the second test pattern relating to the pit row of the fifth group formed in either the lead-in area 27 or the lead-out area 26, or from both. The tilt correction coefficient may be determined. Further, as shown in FIG. 4, when the track of the area 72 on the inner circumference side is searched with the center 70 of the data area 25 as a reference, the tilt correction coefficient on the inner circumference side is used, and the center of the data area 25 is used. When the track of the area 74 on the outer peripheral side is searched based on 70, the outer peripheral side tilt correction coefficient may be used. As is apparent, in this case, the inner tilt correction coefficient is determined by the second test pattern relating to the pit row of the fifth group formed in the lead-in area 27, and the outer tilt correction coefficient is also determined. Read out area 26
It is determined by the second test pattern relating to the pit row of the fifth group formed in the above. Further, since the tilt coefficient usually increases as the search area changes from the inner circumference to the outer circumference, a coefficient correction coefficient for further position-correcting the correction coefficient in accordance with the area being searched or the track number. It may be determined and stored in the system ROM & RAM section 52, and the correction coefficient according to the search position may be output from the system CPU section 50.

In the circuit shown in FIG. 10, after the frequency characteristic of the reproducing system is grasped, the data area 25 is searched for data. That is, the correction coefficient is sent from the system CPU 50 to the transversal filter 104 as correction data in order to make the frequency characteristic of the reproduced signal from the data area 25 detected by the optical head 32 the optimum frequency characteristic. Transversal filter 10
4, the data sent from the system CPU 50 is the D / A converters 111, 112, 113, 114, 115.
Is converted into an analog quantity with the multipliers 116, 117, 1
Transversal filter 1 at 18, 119 and 120
It is multiplied with each tap output of 04. For example, when the amount of inclination is 5 mrad, the reproduced signal of the second test pattern has, for example, the frequency characteristic shown in FIG. 13A, which is shown in FIG. 13C. In order to obtain the optimum characteristic, it suffices that the correction coefficient characteristic as shown in FIG. 13B is output, and the system CPU 50 that determines each tap coefficient value of the transversal filter 104 outputs the D / A converter. 111, 112, 113, 11
4, 115, for example, coefficient values 10H, 20H,
FFH, 20H and 10H are output. Even if the optical disc 10 is tilted and the frequency characteristic of the reproduction signal is deteriorated as described above, a normal reproduction operation can be performed by correcting the reproduction signal with the frequency characteristic of the transversal filter 104.

13 (a), 13 (b) and 13
In (c), λ indicates the wavelength of the light beam, that is, the laser beam, and NA indicates the numerical aperture of the objective lens 32.

Next, an evaluation pattern according to another embodiment of the present invention will be described with reference to FIGS. 14 (a), 14 (b) and 15. In the lead-in area 2 shown in FIG. 4, which is first searched when the optical disc 10 is reproduced, as shown in FIG. 14A as another example of the test pattern for evaluating the pit train formed on the optical disc 10. 3T,
Pits and lands are recorded as evaluation data in a repeating cycle of mT and nT. That is, in the lead-in area 2, as shown in FIG. 15, a pit with a pit length of 3T, a land with a land length of * mT, a pit with a pit length of nT, a pit with a land length of * 3T follow a header 66 describing a physical sector address. , A pit having a pit length of mT, and a land having a land length of * nT are repeatedly recorded as evaluation data 68 in one physical sector. At least one physical sector including the evaluation data may be provided in a certain track or a plurality of physical sectors may be provided in a certain track. Further, a plurality of physical sectors including evaluation data may be provided on different tracks. Where m,
n ≧ 6 and m ≦ n, and m and n ≦ 14 (= k). The pit or land length 3T, * 3T corresponds to the minimum pit length or land length, and the pit or land length 14T, * 14T (kT, * kT) corresponds to the maximum pit length or land length. When the evaluation data shown in FIG. 14A is searched with the light beam, the reflected light level as shown in FIG. 14B is detected.

In a specific example of evaluation data, m = 6, n
= 7, and the evaluation data includes a pit with a pit length of 3T, a land with a land length of * 6T, a pit with a pit length of 7T, a land with a land length of * 3T, a pit with a pit length of 6T, and a land with a land length of * 7T. It is recorded. The set of pit length and land length of 3-6-7 is
In the 16-bit code word (Code Word), "001
000001 0000001 "corresponds, and this 16-bit code word corresponds to an 8-bit 172H data symbol.
That is, the 16-bit code word is converted into the 8-bit data symbol 172H by the 8/16 conversion.

The evaluation data shown in FIG. 14A is shown in FIG.
The error rate correction coefficient is detected by the error rate correction circuit shown in FIG. 16 having a circuit configuration substantially similar to that, and the byte error rate is kept to the minimum. That is, when the optical disc reproducing apparatus starts the reproducing operation as shown in step S50 shown in FIG. 17, the lead-in area 27 of the optical disc 10 is searched as shown in step 51, and the evaluation data shown in FIG. The sector containing is retrieved as shown in step 52. When the sector containing the test pattern is found, the system CPU 50
Is a multiplier 116, 11 of the transversal filter 104 as an equalizer as shown in step S54.
Set the default tap factors to 7, 118, 119, and 120 from the found sectors.
A test pattern having the 3, 6, and 7 patterns shown in (a) is read and output to the head amplifier 40. This test pattern signal is amplified by the head amplifier 40 and passed through a 5-tap transversal filter 104 including delay circuits 121, 122, 123, and
It is supplied to the digitization circuit 105. The reproduced signal is binarized in the binarization circuit 105, and the digitized digital reproduced signal is clock-regenerated in the PLL circuit 106. Here, if there is no error, the demodulation circuit 10
In "7", "001 000001 0000001" is output as a code word represented by 16 bits. If an error occurs during reading, the demodulation circuit 107
Will output other code words containing errors. This code word is supplied to the system processor 54 and converted into a data symbol, and the conversion result is the system CPU.
Is output to 50. In the system CPU 50, it is confirmed whether or not the code word matches the data symbol 172H. Similarly, in order to measure the byte error rate as shown in step S54, the 3.6.7 patterns are converted into code words one after another, and it is confirmed in the system CPU 50 whether or not an error has occurred. Byte error rate S5 for 3.6.7 patterns of
4 is calculated. If the byte error rate is larger than 10 ⁻⁵ as shown in step S55, the process returns to step S54, and the system CPU 50 causes the multiplier 11 of the transversal filter 104 as the equalizer.
Other tap coefficients are set to 6, 117, 118, 119, and 120, and steps S54 and S55 are performed again.
Is executed. If the byte error rate falls within 10 -5 in step S55, the tap coefficient is fixed and the normal reproduction operation is started as shown in step S56.

In the specific example according to the other embodiment described above, the evaluation data has m = 6 and n = 7, and 3-6-7 pit and land repetitions are adopted. However, the evaluation data are 3-7-6, 6-3-7, 7-3-6, 6
Any one of the pit and land repetition of -7-3 and 7-6-3 may be adopted. Where 3-7-6
In the pit and land repetition of 3), the pit with a pit length of 3T, the land with a land length of * 7T, the pit with a pit length of 6T,
The land length is * 3T, the pit length is 7T, and the land length is * 6T. When repeating 6-3-7 pits and lands, the pit length is 6T, the land length is * 3T, and the pit length is 3T. 7T long pit,
The land length is * 6T, the pit length is 3T, and the land length is * 7T. Other repeating patterns are also in the order of arrangement of the numbers.

Next, with reference to FIGS. 18 to 24, a method of recording evaluation data together with video data and management data for reproducing the video data on the optical disk 10 and a recording system to which the recording method is applied will be described. To do.

FIG. 18 shows an encoder system for generating a video file 88 of a title set 84 in which video data is encoded. In the system shown in FIG. 20, for example, a video tape recorder (VTR) 201, an audio tape recorder (ATR) 202, and a sub video player 203 are adopted as sources of main video data, audio data, and sub video data. . These are system controllers (Sys con) 20
Under the control of No. 5, main video data, audio data, and sub video data are generated, and these are respectively encoded by a video encoder (V
ENC) 206, audio encoder (AENC) 2
07 and the sub-picture encoder (SPENC) 208, and similarly the system controller (Sys con) 205
Under the control of the encoders 206, 207, and 208, the main video data, audio data, and sub video data (Comp Video, Comp Audio, Comp Sub
-pict) in the memories 210, 211, 212. Here, when encoding, for example, MPE
Compressed by a compression method defined by the G2 (Moving Picture Expert Group) standard, encoded data corresponds to packed video / audio and sub-picture pack data.

The main video data, audio data, and sub video data (Comp Video, Comp Audio, Comp Sub-pic
t) is output to a file formatter (FFMT) 214 by a system controller (Sys con) 205, converted into a file structure of system video data, and management information such as setting conditions and attributes of each data is stored as a file in the system controller. (Sys con) 205
Stored in the memory 216.

A standard flow of the encoding process in the system controller 205 for creating a file from video data will be described below.

Main video data and audio data are encoded according to the flow shown in FIG. 19 and encoded main video and audio data (Comp Video, Comp Aud
io) data is created. That is, when the encoding process is started, parameters required for encoding the main video data and the audio data are set as shown in step 70 of FIG. Some of the set parameters are set in the system controller (Sys con) 205.
File formatter (FFM
T) 214. As shown in step S71, the main video data is pre-encoded using the parameters, and the optimal distribution of the code amount is calculated. Step S72
The main video is encoded based on the code amount distribution obtained by the pre-encoding as shown in FIG. At this time, audio data encoding is also executed at the same time. If necessary as shown in step S73, a partial re-encoding of the main video data is executed, and the main video data in the re-encoded part is replaced. Main video data and audio data are encoded by this series of steps. Also, steps S74 and S75
The sub-picture data is encoded and the encoded sub-picture data (Comp Sub-pict) is created as shown in FIG. That is,
Parameters necessary for encoding the sub-picture data are similarly set. A part of the parameters set as shown in step S74 is stored in the system controller (Sys con) 205 and used by the file formatter (FFMT) 214. The sub-picture data is encoded based on this parameter. By this processing, the sub-picture data is encoded.

According to the flow shown in FIG. 20, the encoded main video data, audio data, and sub video data (Com Video, Comp Audio, Comp Sub-pict) are combined and converted into a specific data structure. That is, as shown in step S76, a data cell as a minimum unit of video data in which a plurality of video, audio and sub-picture packs are arranged is set, and reproduction information for reproducing each data cell is created. Next, as shown in step S77, the configuration of cells forming a program chain in which a plurality of programs arranged in the cell reproduction order are connected, the main video,
Sub video and audio attributes are set (some of these attribute information is information obtained at the time of each data encoding), and cell reproduction management information for managing cell reproduction is created from this cell information. To be done. Encoded main video data, audio data, and sub video data (Comm
While subdividing Video, Comp Audio, Comp Sub-pict) into fixed packs and playing them back in the order of the time code of each data, place a navigation pack to control the playback of the packs at the beginning of each predetermined unit. Each data unit is arranged, and a cell is formed from this data unit. Then, a video object composed of a plurality of cells is constructed and formatted into a structure of a title set for playing a video of a title corresponding to the set of the video objects.

21 and 22 show a disc formatter system for recording a title set formatted as described above on an optical disc. As shown in FIGS. 21 and 22, in the disc formatter system, these file data are supplied to the volume formatter (VFMT) 226 from the memories 220 and 222 in which the created title set is stored. In the volume formatter (VFMT) 226, management information is extracted from the title sets 84 and 86 to create a video manager for managing the title set, and logical data in a state to be recorded on the disc 10 in a predetermined arrangement order is created. It Volume formatter (VFM
T) 226, the error correction data is added to the logical data created by the disk formatter (DFMT) 228, and reconverted into physical data to be recorded on the disk. In the modulator 230, the physical data created by the disk formatter (DFMT) 228 is converted into recording data to be actually recorded on the disk, and the recording data subjected to the modulation processing is recorded by the recording device 232 by the recording device 232.
Recorded in.

Regarding the test patterns described with reference to FIGS. 5A to 9C, in the formatter system shown in FIG. 21, the recorder 232 switches the switch 236 prior to recording the recording data on the disk 10. Is connected to the test pattern signal generator 234 via. From the test pattern signal generator 234, test pattern signals relating to the first and second test patterns relating to the pit rows of the first to fifth groups described above are generated. According to the generated test pattern signal, the test patterns of the first to fifth groups are recorded in the lead-in area 27 and its vicinity. After recording the test pattern, the switch 236 is switched so that the recorder 232 causes the modulator 23 to operate.
0, and physical data is recorded in the data area 28. When the recording of the physical data is completed, the switch 236 is switched again and the recorder 232 is switched to the switch 236.
It is connected to the test pattern signal generator 234 via the, and the pit rows of the first to fifth groups are recorded on the optical disk 10 again.

Regarding the 3.6.7 patterns described with reference to FIGS. 14 (a) to 15, the 3 and 6 patterns together with the sector address as shown in FIG.
A memory 221 that stores evaluation data in which 6 and 7 patterns are continuous is prepared, the evaluation data is first supplied to the volume formatter (VFMT) 226, and then the file data is read from the file data memories 220 and 222. (VFMT) 226. Therefore, evaluation data in which 3, 6 and 7 patterns are consecutive is recorded together with the sector address in a predetermined sector address of the lead-in area 27, and recording data such as video data is recorded in the data area 28 as physical data.

A standard flow for creating the above-mentioned disc will be described with reference to FIGS. 23 and 24. Figure 2
3 shows a flow in which logical data to be recorded on the disk 10 is created. That is, step S80
As shown in, the parameter data such as the number of video data files, the order of arrangement, the size of each video data file, etc. is initially set. Next, a video manager is created from the parameters set as shown in step S81 and the video title set information of each video title set 72. Thereafter, as shown in step S82, the data is arranged in the order of the video manager 71 and the video title set 72 along the corresponding logical block number, and the logical data to be recorded on the disc 10 is created. As described above, the 3/6 pattern has 17 logical data items.
This corresponds to 2H, and 172H of logical data is continuously converted into physical data.

After that, the flow for creating physical data to be recorded on the disc as shown in FIG. 24 is executed. That is, as shown in step S83, the logical data is divided into a certain number of bytes, and error correction data is generated. Next, as shown in step S84, the logical data divided into a certain number of bytes and the generated error correction data are combined to create a physical sector. Then, as shown in step S85, physical data is created by combining the physical sectors. In this way, the physical data generated by the flow shown in FIG. 25 is subjected to a modulation process based on a fixed rule to create recorded data. Then, this recording data is recorded on the disc 10. This disc 10 is used as a master, and a large number of optical discs are duplicated from this master.

In the above-described embodiment, the pit rows of the first group to the fifth group do not have to be recorded in the lead-in area 27 and the lead-out area 28 in that order, and may be physically distinguished. If you can
It may be recorded in any order. If the manufactured optical disk 10 described below is not evaluated, the pit rows of the first to fourth groups are the same as those of the optical disk 1.
0 does not need to be recorded, and when only the evaluation of the optical disc 10 is targeted and tilt correction is not necessary,
The pit row of the fifth group may not be formed.

Next, a method for evaluating the optical disc manufactured by the above method will be described. First, the optical disk 10 manufactured as described above is loaded into the reproducing apparatus, and the first to fourth groups of the first test pattern are loaded.
The playback signal of the group is obtained. From these signal waveforms, the quality of the optical disc 10 manufactured as follows is evaluated. The formability of each pit is the longest pit (nT +
Evaluated from the signal waveform corresponding to * nT). That is, the signal waveform corresponding to the longest pit (nT ++ nT) is the same as that shown in FIG.
As shown in (b), the pulse width is relatively large, the level change between the rising edge and the falling edge is small, and the rising edge and the falling edge are clear. Therefore, if the signal waveform is interrupted or unclear, the optical disc 10 manufactured is judged to be defective because it has a problem in the pit formability. Whether the pits are formed so as to be clearly distinguishable from the non-pit areas between the pits is the shortest pit (mT ++ mT)
Is evaluated from the signal waveform corresponding to. That is, FIG. 6 (b)
25, the noise level (N) and the carrier level (C) corresponding to the peak level of the reproduced signal are obtained as shown in FIG. 25, and the formability of the pit row is judged from the C / N ratio. . When this C / N ratio is small, it becomes impossible to distinguish between carriers corresponding to pits and noise corresponding to defects on the optical disk 10. Therefore, if this C / N ratio is smaller than a predetermined value, the pit train It is judged that the manufactured optical disk 10 is a defective product because it has a problem in moldability. Further, when the pit train of the third group is converted into a reproduction signal by a light beam, an MTF signal as shown in FIG. 7 is obtained, and from this MTF signal, as described above, the third group as shown in FIG. The frequency characteristic of the reproducing system with respect to the pit train of is obtained. The frequency characteristics are deteriorated when the optical disk 10 has a defect such as distortion or eccentricity. Therefore, by judging this frequency characteristic,
It is possible to determine whether the physical characteristics of the optical disc 10 are good or bad.

Furthermore, as shown in FIG. 8, the pit train of the fourth group includes a pit length train (mT ++ mT) corresponding to the center track and a pit length train [(m + 1) T ++ (corresponding to an adjacent track. m + 1) T] and [(m + 2)
Since T + * (m + 2) T] is formed, it is possible to evaluate crosstalk from adjacent tracks included in the reproduction signal. Here, the crosstalk amount Ct is
Amplitude At of the reproduction track (corresponds to the center track)
Corresponds to a value obtained by subtracting the amplitude Br of the adjacent track (Ct = Br-At (dB)). That is, when the pit length string (mT ++ mT) corresponding to the center track is reproduced, as shown in FIG. 27, the pit length string [(m + 1) T ++ (m + 1) T] and the pit length string corresponding to the adjacent track are Frequencies fr1 and fr2 of [(m + 2) T ++ (m + 2) T]
Appears, and a pit length string (mT + * m) having a frequency fc
T) main signal level and pit length sequence [(m + 1) T ++ corresponding to adjacent tracks having these frequencies fr1 and fr2
(M + 1) T] and [(m + 2) T ++ (m + 2) T]
The difference from the adjacent signal level of can be detected as the amount of crosstalk. When the cross amount is large, the search track and the adjacent track can be sufficiently discriminated, but when the cross amount is small, the search track and the adjacent track cannot be discriminated. When the crosstalk amount is equal to or less than the predetermined value, the optical disc 10 is determined as a defective product.

When the optical disc 10 is evaluated by using the 3.6.7 evaluation pattern according to another embodiment, FIG.
If the byte error rate does not ^fall within 10 ⁻⁵ even if the tap coefficient of the transversal filter 104 is changed even if the tap coefficient is changed in step S55 of the flowchart shown in FIG. .

[0076]

In the above-mentioned optical disc, the characteristics of the reproduction signal can be optimized even if the relative inclination between the reproduction surface and the objective lens surface occurs.

Further, the quality of the recorded data can be determined with high accuracy by using the evaluation pattern.

As described above, even if the relative inclination between the disc reproducing surface and the objective lens occurs, each tap coefficient of the reproducing equivalent circuit (transversal filter) should be optimized according to the amount. Thereby, the frequency characteristic of the reproduction equivalent circuit can be optimized and the reproduction signal characteristic can be improved. Therefore, finally, the error rate at the time of data reading can be improved. Further, since there are no mechanical parts such as motors and gears in the control system, it is possible to easily increase the band and obtain a wide control band, and it is suitable for downsizing the device.

[Brief description of drawings]

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

2 is a block diagram showing details of the disk drive device shown in FIG. 1. FIG.

FIG. 3 is a perspective view schematically showing the structure of the optical disc shown in FIG.

4 is a plan view showing the optical disc shown in FIGS. 1 and 3. FIG.

5 is a plan view showing a longest pit string as a test pattern formed on the optical disc shown in FIG. 4 and a waveform diagram showing a reproduction signal waveform reproduced from the longest pit string.

6A and 6B are a plan view showing a shortest pit string as a test pattern formed on the optical disc shown in FIG. 4 and a waveform diagram showing a reproduction signal waveform reproduced from the shortest pit string.

FIG. 7 is a graph showing an MTF signal reproduced from a shortest pit string and a longest pit string as a test pattern and pit strings having different pit lengths therebetween.

FIG. 8 is a plan view showing a center pit row and an adjacent pit row as a test pattern.

FIG. 9 is a shortest pit string 3T and a longest pit string 11T as test patterns, and a different pit length 5 between them.
MTF reproduced from a pit train having T, 7T, 9T
FIG. 6 is a graph showing a signal and a waveform diagram showing a reproduction signal of a shortest pit string 3T and a longest pit string 11T as a test pattern.

10 is a block diagram showing a tilt correction circuit that corrects a reproduction signal incorporated in the optical disk device shown in FIG. 1 using a test signal.

FIG. 11 is a graph showing frequency characteristics of an ideal reproduction signal with respect to a test pattern.

FIG. 12 is a graph showing frequency characteristics of an actual reproduction signal including a tilt component with respect to a test pattern.

FIG. 13 is a graph showing a frequency characteristic of a reproduction signal including a tilt component, a graph showing a frequency characteristic of a transversal filter, and a composite frequency characteristic obtained by synthesizing a frequency characteristic of a reproduction signal including a tilt component and a frequency characteristic of a transversal filter. It is a graph which shows.

FIG. 14 is a plan view showing a pit train showing an evaluation pattern according to another embodiment of the present invention and a waveform diagram showing a reproduction signal from the pit train.

15 is a schematic diagram showing a data structure of the evaluation pattern shown in FIG.

16 is a block diagram showing a tilt correction circuit that corrects a reproduction signal incorporated in the optical disk device shown in FIG. 1 using an evaluation pattern.

FIG. 17 is a flowchart showing a procedure for correcting a reproduction signal by the correction circuit shown in FIG. 16 using the evaluation pattern shown in FIG. 14A.

FIG. 18 is a block diagram showing an encoder system that encodes video data to generate a video file.

19 is a flowchart showing an encoding process in the encoder system shown in FIG.

20 is a flowchart for creating a video data file by combining main video data, audio data, and sub video data encoded by the flow shown in FIG.

FIG. 21 is a block diagram showing a system of a disc formatter for recording a formatted video file on an optical disc.

FIG. 22 is a block diagram showing a system of a disc formatter for recording a formatted video file on an optical disc.

23 is a flow chart for creating logical data for recording on a disc in the disc formatter shown in FIGS. 21 and 22. FIG.

FIG. 24 is a flowchart for creating physical data to be recorded on a disc from logical data.

FIG. 25 is a graph for explaining a C / N ratio which is a ratio of a carrier level to a noise level.

FIG. 26 is a graph showing the frequency characteristic of the reproducing system with respect to the pit train related to the test pattern of the third group.

FIG. 27 is a graph for explaining crosstalk characteristics.

[Explanation of symbols]

4 ... Key operation / display section 6 ... Monitor section 8 ... Speaker section 10 ... Optical disk 11 ... Motor drive circuit 12 ... Spindle motor 16 ... Light reflection layer 24 ... Clamping area 26 ... Lead-out area 27 ... Lead-in area 28 ... Data Recording area 30 Disk drive section 36 Focus circuit 37 Feed motor drive circuit 38 Tracking circuit 40 Head amplifier 44 Servo processing circuit 50 System CPU section 52 System ROM / RAM section 54 System processor section 56 ... Data RAM section 58 ... Video decoder section 60 ... Audio decoder section 62 ... Sub-picture decoder section 64 ... D / A and data reproducing section 104 ... Transversal filter 105 ... Binarization circuit 106 ... PLL circuit 1 7 ... demodulation circuit 108 ... data processor 116,117,118,119,120 ... multiplier 111, 112, 113, 114 ... D /
A converter 121, 122, 123, 124 ... Delay circuit 201 ... Video tape recorder (VTR) 202 ... Audio tape recorder (ATR) 203 ... Sub-picture playback device (Subpicture, source) 205 ... System controller (Sys, con) 206 ... Video encoder (VENC) 207 ... Audio encoder (AENC) 208 ... Sub-picture encoder (SPENC) 215 ... Memory 226 ... Volume formatter (VFMT) 228 ... Disk formatter (DFMT) 230 ... Modulator (Modulator) 232 ... Recorder (recorder ( Recoder) 320 ... Encoding system 310 ... Modulator / transmitter

Claims (111)

[Claims] 1. When the channel pit length is T and n and m are integers, the pit is between the shortest pit length (mT), the longest pit length (nT), and the shortest pit length (mT) and the longest pit length (nT). Of the specified non-pit length, the non-pit is between the shortest non-pit length (* mT), the longest non-pit length (* nT) and the shortest non-pit length (* mT) and the longest non-pit length (* nT). Data area in which data is recorded in the array of pits and non-pits, and the combination of the shortest pit and the shortest non-pit is provided outside the data area. A shortest pit string, a longest pit string in which the combination of the longest pit and the longest non-pit is repeated, and a pit having a predetermined pit length between the shortest pit length (mT) and the longest pit length (nT) And a test pattern area in which a test pattern in which a predetermined pit row in which a combination of non-pits corresponding to the pits is repeated is recorded, is included. 2. The data area is defined between a lead-in area of an inner peripheral area and a lead-out area of an outer peripheral area, and the test pattern area is outside the lead-in area and in contact with the area. The optical disk according to claim 1, wherein the optical disk is provided in at least one of an outer area portion outside the out area and in contact with the area. 3. The inner area portion defined between the lead-in area of the inner peripheral area and the lead-out area of the outer peripheral area, wherein the test pattern area is outside the lead-in area and in contact with the area. 2. The optical disc according to claim 1, wherein the optical disc is provided outside of the lead-out area and in an outer area portion in contact with the area. 4. A pit has a shortest pit length (3T), a longest pit length (11T), and a predetermined pit length (4T, 5T, 6 between the shortest pit length (3T) and the longest pit length (11T).
T, 7T, 8T, 9T, 10T) and the non-pit has the shortest non-pit length * 3T and the longest non-pit length * 11.
T and shortest non-pit length * 3 T and longest non-pit length * 1
Predetermined non-pit length between 1T (* 4T, * 5T, * 6T,
The optical disc according to claim 1, having any one of * 7T, * 8T, * 9T, * 10T). 5. A pit has a shortest pit length (4T), a longest pit length (18T), and a predetermined pit length (5T, 6T, 7) between the shortest pit length (4T) and the longest pit length (18T).
T, 8T, 9T, 10T, 11T, 12T, 13T, 1
4T, 15T, 16T, 17T), and the non-pit has the shortest non-pit length (* 4T), the longest non-pit length (* 18T), the shortest non-pit length (* 4T), and the longest non-pit length (* 4T). Predetermined non-pit length (* 5T) (* 5T)
T, * 6T, * 7T, * 8T, * 9T, * 10T, * 1
1T, * 12T, * 13T, * 14T, * 15T, * 1
The optical disc according to claim 1, which has one of 6T and * 17T). 6. A signal for reproducing a test pattern and data from an optical disk having a data area in which pits and non-pits are arranged according to recording data and a test pattern in which the pits and non-pits are arranged based on a predetermined arrangement rule. Read-out means that optically reads out the data, the detection means that detects a correction coefficient unique to the device from the reproduction signal read out from the test pattern, and the reproduction signal read out from the data area is corrected by this correction coefficient. An optical disc reproducing apparatus comprising: a correcting unit. 7. The detection means includes a circuit for detecting an MTF signal from a reproduction signal of a test pattern, the correction means includes an equalization filter for optimizing the reproduction signal, and the M
7. The optical disk reproducing apparatus according to claim 6, further comprising a filter means for optimizing the frequency characteristic of the data reproduction signal according to the frequency characteristic of the TF signal. 8. The optical disk according to claim 1, wherein when the channel pit length is T and n and m are integers, the pits are the shortest pit length (mT), the longest pit length (nT), the shortest pit length (mT), and the longest pit length. It has any of the predetermined pit lengths between (nT), and the non-pit is the shortest non-pit length (* m
T), the longest non-pit length (* nT) and a predetermined non-pit length between the shortest non-pit length (* mT) and the longest non-pit length (* nT), and the arrangement of these pits and non-pits The data area in which data is recorded and the shortest pit row provided outside the data area, in which the combination of the shortest pit and the shortest non-pit is repeated, the longest pit row in which the combination of the longest pit and the longest non-pit is repeated, and A test pattern in which a test pattern is recorded in which a pit having a predetermined pit length between the shortest pit length (mT) and the longest pit length (nT) and a predetermined pit row in which a combination of non-pits corresponding to this pit are repeated are recorded. 7. A region is provided.
The optical disk reproducing device according to item 1. 9. The data area is defined between a lead-in area of an inner peripheral area and a lead-out area of an outer peripheral area, and the test pattern area is an inner area portion outside the lead-in area and in contact with the area. 9. The optical disk reproducing apparatus according to claim 8, wherein the optical disk reproducing apparatus is provided in at least one of an outer area portion outside the lead-out area and in contact with the area. 10. The reading means reads a test pattern from at least one of an inner area portion outside the lead-in area and in contact with the area and an outer area portion in the lead-out area and in contact with the area. afterwards,
The optical disk reproducing apparatus according to claim 9, wherein data is read from the data area. 11. The data area is defined between a lead-in area of an inner peripheral area and a lead-out area of an outer peripheral area, and the test pattern is the lead-in area and an inner area portion in contact with the area and a lead-out area. 9. The optical disk reproducing apparatus according to claim 8, wherein the optical disk reproducing apparatus is provided in any of the areas which are areas and which are in contact with the area. 12. The reading means reads the test pattern from both the lead-in area and an inner area portion in contact with the area and the lead-out area and an outer area portion in contact with the area, and thereafter, Data is read from the data area, and the detection means detects a first correction coefficient unique to the device from the reproduction signal read from the test pattern of the inner area outside the lead-in area, and detects the data outside the lead-out area. A second correction coefficient specific to the apparatus is detected from the reproduction signal read from the test pattern in the outer area portion of the data area, and the correction means reads the data area with the first and second correction coefficients. The optical disk reproducing apparatus according to claim 11, wherein the reproduction signal is corrected. 13. The correcting means corrects the reproduction signal read from the first area of the data area with the first correction coefficient, and corrects the first area of the data area with the second correction coefficient. 12. The optical disc reproducing apparatus according to claim 11, wherein the reproducing signal read from the other area except for is corrected. 14. A data area in which pits and non-pits are arranged according to recording data, and a test pattern and data in which the pits and non-pits are arranged based on a predetermined arrangement rule are optically used as reproduction signals from an optical disk. And a step of detecting a correction coefficient unique to the apparatus from the reproduction signal read from the test pattern, and a step of correcting the reproduction signal read from the data area with the correction coefficient. A method for reproducing an optical disc, characterized in that 15. The detecting step includes a step of detecting an MTF signal from a reproduction signal of a test pattern, and the correcting step optimizes a frequency characteristic of the data reproduction signal according to a frequency characteristic of the MTF signal. The method for reproducing an optical disc according to claim 14, further comprising a filtering step. 16. The optical disk according to claim 1, wherein the channel pit length is T, and n and m are integers, the shortest pit length (mT), the longest pit length (nT), the shortest pit length (mT), and the longest pit length. It has any of the predetermined pit lengths between (nT), and the non-pit is the shortest non-pit length (* m
T), the longest non-pit length (* nT) and a predetermined non-pit length between the shortest non-pit length (* mT) and the longest non-pit length (* nT), and the arrangement of these pits and non-pits The data area in which data is recorded and the shortest pit row provided outside the data area, in which the combination of the shortest pit and the shortest non-pit is repeated, the longest pit row in which the combination of the longest pit and the longest non-pit is repeated, and A test pattern in which a test pattern is recorded in which a pit having a predetermined pit length between the shortest pit length (mT) and the longest pit length (nT) and a predetermined pit row in which a combination of non-pits corresponding to this pit are repeated are recorded. A region is provided.
4. The method for reproducing an optical disc according to item 4. 17. The data region is defined between a lead-in region of an inner peripheral region and a lead-out region of an outer peripheral region, and the test pattern region is outside the lead-in region and an inner region portion in contact with the region. The lead-out area, which is provided in at least one of the outer area portions in contact with the area.
The method for reproducing the optical disc described in. 18. The read means reads the test pattern from at least one of an inner area portion outside the lead-in area and contacting the area and an outer area portion outside the lead-in area and contacting the area, afterwards,
18. The method of reproducing an optical disc according to claim 17, wherein the data is read from the data area. 19. The data area is defined between a lead-in area of an inner peripheral area and a lead-out area of an outer peripheral area, and the test pattern is outside the lead-in area and an inner area portion and a lead contacting the area. 18. The method for reproducing an optical disk according to claim 17, wherein the reproducing method is provided in any of the outer area portions which are out areas and are in contact with the outer area. 20. In the reading step, a test pattern is read from both an inner area portion outside the lead-in area and in contact with the area and an outer area portion outside the lead-in area and in contact with the area. Then, the data is read from the data area, and in the detecting step, the first correction coefficient peculiar to the apparatus is detected from the reproduction signal read from the test pattern in the inner area portion outside the lead-in area, and the read-out is performed. A second correction coefficient peculiar to the apparatus is detected from the reproduction signal read from the test pattern in the outer area portion outside the area, and in the correction step, the second correction coefficient is read from the data area with the first and second correction coefficients. 20. The method of reproducing an optical disk according to claim 19, wherein the reproduced signal that has been reproduced is corrected. 21. In the correction step, the reproduction signal read from the first area of the data area is corrected by the first correction coefficient, and the first correction coefficient of the data area is corrected by the second correction coefficient.
21. The method of reproducing an optical disc according to claim 20, wherein the reproduction signal read from the area other than the area is corrected. 22. The channel pit length is T, and n and m
Is an integer, the pit has one of the shortest pit length (mT), the longest pit length (nT), and a predetermined pit length between the shortest pit length (mT) and the longest pit length (nT),
The non-pit has either the shortest non-pit length (* mT), the longest non-pit length (* nT), or the predetermined non-pit length between the shortest non-pit length (* mT) and the longest non-pit length (* nT). Then, a data conversion step of converting data to be recorded into pit data corresponding to the arrangement of the pits and the non-pits, a shortest pit string in which the combination of the shortest pits and the shortest non-pits is repeated, the longest pits and the longest non-pits. The longest pit string in which the combination of pits is repeated, the pit having the predetermined pit length between the shortest pit length (mT) and the longest pit length (nT), and the predetermined pit string in which the non-pit combination corresponding to this pit is repeated are arranged. Generating a test signal corresponding to a test pattern, and providing the pit data in a data area of an optical disc and the test signal. Recording wherein the recording data to the optical disc having a, a step of recording an array of pits and non-pits different test pattern area and an optical disc data area. 23. The data area is defined between a lead-in area of an inner peripheral area and a lead-out area of an outer peripheral area, and the test pattern area is the lead-in area and an inner area portion and a lead in contact with the area. 23. The recording method for recording data on an optical disc according to claim 22, wherein the recording method is provided in at least one of an outer area portion which is an out area and is in contact with the area. 24. The data area is defined between a lead-in area of an inner peripheral area and a lead-out area of an outer peripheral area, and the test pattern area is the lead-in area and an inner area portion and a lead contacting the area. 23. The recording method for recording data on an optical disk according to claim 22, wherein the recording method is provided in any of the outer area portions which are out areas and contact the area. 25. A pit is a shortest pit length (3T), a longest pit length (11T), and a predetermined pit length (4T, 5T, 6 between the shortest pit length (3T) and the shortest pit length (11T).
T, 7T, 8T, 9T, 10T) and the non-pit has the shortest non-pit length * 3T and the longest non-pit length * 11.
T and shortest non-pit length * 3 T and longest non-pit length * 1
Predetermined non-pit length between 1T (* 4T, * 5T, * 6T,
The recording method for recording data on an optical disc according to claim 22, having any one of * 7T, * 8T, * 9T, * 10T). 26. A pit is a shortest pit length (4T), a longest pit length (18T), and a predetermined pit length (5T, 6T, 7) between the shortest pit length (4T) and the longest pit length (18T).
T, 8T, 9T, 10T, 11T, 12T, 13T, 1
4T, 15T, 16T, 17T), and the non-pit has the shortest non-pit length (* 4T), the longest non-pit length (* 18T), the shortest non-pit length (* 4T), and the longest non-pit length (* 4T). Predetermined non-pit length (* 5T) (* 5T)
T, * 6T, * 7T, * 8T, * 9T, * 10T, * 1
1T, * 12T, * 13T, * 14T, * 15T, * 1
The recording method for recording data on the optical disc according to claim 22, characterized in that it has any one of 6T and * 17T). 27. The channel pit length is T, and n and m
Is an integer, the pit has one of the shortest pit length (mT), the longest pit length (nT), and a predetermined pit length between the shortest pit length (mT) and the longest pit length (nT),
The non-pit has either the shortest non-pit length (* mT), the longest non-pit length (* nT), or the predetermined non-pit length between the shortest non-pit length (* mT) and the longest non-pit length (* nT). Data conversion means for converting data to be recorded into pit data corresponding to the arrangement of the pits and the non-pits, a shortest pit string in which the combination of the shortest pit and the shortest non-pit is repeated, the longest pit and the longest non-pit. The longest pit string in which the combination of pits is repeated, the pit having the predetermined pit length between the shortest pit length (mT) and the longest pit length (nT), and the predetermined pit string in which the non-pit combination corresponding to this pit is repeated are arranged. Test signal generating means for generating a test signal corresponding to a test pattern, and the pit data in the data area of the optical disc. Serial recording apparatus characterized by recording data to the optical disc having a recording means for recording a sequence of pits and non-pits different test pattern area and the test signal to the optical disk of the data area. 28. The data area is defined between a lead-in area of an inner peripheral area and a lead-out area of an outer peripheral area, and the test pattern area is the lead-in area and an inner area portion and a lead contacting the area. 28. The recording device for recording data on an optical disc according to claim 27, wherein the recording device is provided in at least one of an outer region portion which is an out region and is in contact with the outer region. 29. The data area is defined between a lead-in area of an inner peripheral area and a lead-out area of an outer peripheral area, and the test pattern area is the lead-in area and an inner area portion and a lead contacting the area. 28. The recording apparatus for recording data on an optical disc according to claim 27, wherein the recording apparatus is provided in any of the outer area portions which are out areas and contact the area. 30. A pit is a shortest pit length (3T), a longest pit length (11T), and a predetermined pit length (4T, 5T, 6 between the shortest pit length (3T) and the longest pit length (11T).
T, 7T, 8T, 9T, 10T) and the non-pit has the shortest non-pit length * 3T and the longest non-pit length * 11.
T and shortest non-pit length * 3 T and longest non-pit length * 1
Predetermined non-pit length between 1T (* 4T, * 5T, * 6T,
The recording device for recording data on the optical disc according to claim 27, having any one of * 7T, * 8T, * 9T, * 10T). 31. A pit has a shortest pit length (4T), a longest pit length (18T), and a predetermined pit length (5T, 6T, 7) between the shortest pit length (4T) and the shortest pit length (18T).
T, 8T, 9T, 10T, 11T, 12T, 13T, 1
4T, 15T, 16T, 17T), and the non-pit has the shortest non-pit length (* 4T), the longest non-pit length (* 18T), the shortest non-pit length (* 4T), and the longest non-pit length (* 4T). Predetermined non-pit length (* 5T) (* 5T)
T, * 6T, * 7T, * 8T, * 9T, * 10T, * 1
1T, * 12T, * 13T, * 14T, * 15T, * 1
The recording device for recording data on the optical disc according to claim 27, having any one of 6T and * 17T). 32. The channel pit length is T, and n and m
Is an integer, the pit has one of the shortest pit length (mT), the longest pit length (nT), and a predetermined pit length between the shortest pit length (mT) and the longest pit length (nT),
The non-pit has either the shortest non-pit length (* mT), the longest non-pit length (* nT), or the predetermined non-pit length between the shortest non-pit length (* mT) and the longest non-pit length (* nT). However, the data area in which the data is recorded in this pit and non-pit array, and the shortest pit and the shortest non-pit, and the shortest pit length (mT) and the longest pit length (nT) are provided outside this data area. A test pattern area in which a test pattern for determining a recording state of an optical disc on which a test pattern related to a combination of a pit selected from pits having a predetermined pit length and a non-pit corresponding to this pit is recorded is formed. An optical disc comprising: 33. The test pattern has a maximum pit length (n
4. A pit string (nT ++ nT) in which pits having T) and non-pits are repeated is included.
The optical disc according to item 3. 34. The shortest pit length (m
4. A pit string (mT ++ mT) in which pits having T) and non-pits are repeated is included.
2. The optical disc according to 2. 35. The test pattern has a maximum pit length (n
Pit sequence having pits having T) and non-pits repeated (nT ++ nT), pit having pits having the shortest pit length (mT) and pit sequence having non-pits repeated (mT ++ m)
T) and the shortest pit length sequence (mT + * mT) to a predetermined pit length sequence (mT + * mT), and in the meantime, the pit length (m + 1) T, which is not a multiple relation,
A pit string [(m +) in which pits and non-pits having (m + 2) T, (m + 4) T, and (m + 8) T are repeated
1) T ++ (m + 1) T], [(m + 2) T ++ (m +
33. The optical disc according to claim 32, which comprises: 2) T], [(m + 4) T ++ * (m + 4) T] and [(m + 8) T ++ * (m + 8) T]. 36. As a test pattern, the shortest pit length string (mT + * mT) is repeated over one round of the optical disc, and the shortest pit length string (mT) corresponding to the center track is formed.
Pit length string [(m
+1) T ++ (m + 1) T] and pit length string [(m +
33. The optical disc according to claim 32, wherein 2) T + * (m + 2) T] is repeated over one round of the optical disc. 37. The data area is defined between the lead-in area of the inner peripheral area and the lead-out area of the outer peripheral area, and the test pattern area is outside the lead-in area and in contact with the inner area portion and the lead. 33. It is provided in at least one of the outer area portions outside the out area and in contact with the area.
The optical disc described in. 38. The data area is defined between the lead-in area of the inner peripheral area and the lead-out area of the outer peripheral area, and the test pattern area is provided in both the lead-in area and the lead-out area. The optical disc according to claim 32, wherein: 39. The pit is a shortest pit length (3T), a longest pit length (11T), and a predetermined pit length (4T, 5T, 6 between the shortest pit length (3T) and the longest pit length (11T).
T, 7T, 8T, 9T, 10T) and the non-pit has the shortest non-pit length * 3T and the longest non-pit length * 11.
T and shortest non-pit length * 3 T and shortest non-pit length * 1
Predetermined non-pit length between 1T (* 4T, * 5T, * 6T,
33. The optical disc according to claim 32, having any one of * 7T, * 8T, * 9T, * 10T). 40. A pit has a shortest pit length (4T), a longest pit length (18T), and a predetermined pit length (5T, 6T, 7) between the shortest pit length (4T) and the longest pit length (18T).
T, 8T, 9T, 10T, 11T, 12T, 13T, 1
4T, 15T, 16T, 17T), and the non-pit has the shortest non-pit length (* 4T), the longest non-pit length (* 18T), the shortest non-pit length (* 4T), and the longest non-pit length (* 4T). Predetermined non-pit length (* 5T) (* 5T)
T, * 6T, * 7T, * 8T, * 9T, * 10T, * 1
1T, * 12T, * 13T, * 14T, * 15T, * 1
33. The optical disc according to claim 32, having any one of 6T and * 17T). 41. A signal for reproducing a test pattern and data from an optical disc having a data area in which pits and non-pits are arranged according to recording data and a test pattern in which the pits and non-pits are arranged based on a predetermined arrangement rule. An optical disc evaluation apparatus, comprising: a reading unit that optically reads as the above; and a detection unit that detects evaluation data unique to the optical disc from the reproduction signal read from the test pattern. 42. In the optical disc, when the channel pit length is T and n and m are integers, the pits are the shortest pit length (mT), the longest pit length (nT), the shortest pit length (mT), and the longest pit length. It has any of the predetermined pit lengths between (nT), and the non-pit is the shortest non-pit length (* m
T), the longest non-pit length (* nT) and a predetermined non-pit length between the shortest non-pit length (* mT) and the longest non-pit length (* nT), and the arrangement of these pits and non-pits The data area in which the data is recorded, and the pits provided outside the data area and having a predetermined pit length between the shortest pit and the shortest non-pit and the shortest pit length (mT) and the longest pit length (nT) are selected. And a test pattern area in which a test pattern for determining a recording state of an optical disc on which a test pattern related to a combination of a pit and a non-pit corresponding to the pit is recorded is provided. Item 41. An optical disc evaluation apparatus according to Item 41. 43. The longest pit length (n
5. A pit string (nT ++ nT) in which pits having T) and non-pits are repeated is included.
2. The optical disk evaluation apparatus described in 2. 44. The test pattern has a shortest pit length (m
5. A pit sequence (mT ++ mT) in which pits having T) and non-pits are repeated is included.
1. The optical disk evaluation device described in 1. 45. The test pattern has a maximum pit length (n
Pit sequence having pits having T) and non-pits repeated (nT ++ nT), pit having pits having the shortest pit length (mT) and pit sequence having non-pits repeated (mT ++ m)
T) and the shortest pit length sequence (mT + * mT) to the predetermined pit length sequence (8mT + * 8mT), and in the meantime, the pit lengths (m + 1) are not in a multiple relationship.
Pit sequence [(m + 1) T ++ (m + 1) T], [(m + 2) T +] in which pits and non-pits having T, (m + 2) T, (m + 4) T, and (m + 8) T are repeated
* (M + 2) T], [(m + 4) T ++ * (m + 4) T,
And ([m + 8) T ++ * (m + 8) T]. 46. As a test pattern, the shortest pit length sequence (mT + * mT) is repeated over one round of the optical disc, and the shortest pit length sequence (mT) corresponding to the center track is formed.
Pit length string [(m
+1) T ++ (m + 1) T] and pit length string [(m +
42. The optical disc evaluation apparatus according to claim 41, wherein 2) T + * (m + 2) T] is repeated over one round of the optical disc. 47. The data area is defined between the lead-in area of the inner peripheral area and the lead-out area of the outer peripheral area, and the test pattern area is outside the lead-in area and in contact with the inner area portion and the lead. 42. It is provided in at least one of the outside area portions outside the out area and in contact with the area.
The optical disk evaluation apparatus described in 1. 48. The data area is defined between the lead-in area of the inner peripheral area and the lead-out area of the outer peripheral area, and the test pattern area is outside the lead-in area and in contact with the inner area portion and the lead. 42. The optical disk evaluation apparatus according to claim 41, wherein the optical disk evaluation apparatus is provided in any of the outer area portions outside the out area and in contact with the area. 49. A signal for reproducing a test pattern and data from an optical disc having a data area in which pits and non-pits are arranged according to recording data and a test pattern in which the pits and non-pits are arranged based on a predetermined arrangement rule. And a step of detecting the evaluation data peculiar to the optical disk from the reproduction signal read from the test pattern, and a step of judging the quality of the optical disk from the evaluation data. A method for evaluating an optical disk, characterized by: 50. In the optical disc, when the channel pit length is T and n and m are integers, the pits are the shortest pit length (mT), the longest pit length (nT), the shortest pit length (mT), and the longest pit length. It has any of the predetermined pit lengths between (nT), and the non-pit is the shortest non-pit length (* m
T), the longest non-pit length (* nT) and a predetermined non-pit length between the shortest non-pit length (* mT) and the longest non-pit length (* nT), and the arrangement of these pits and non-pits A data area in which data is recorded, and the shortest pit, the shortest non-pit, the shortest pit length (mT), and the longest pit length (* nT) which are provided outside this data area
A test pattern formed with a test pattern for determining a recording state of an optical disc on which a test pattern related to a combination of a pit selected from pits having a predetermined pit length and a non-pit corresponding to this pit is recorded 50. A region.
The method for evaluating an optical disk described in. 51. A test pattern has a maximum pit length (n
5. A pit string (nT ++ nT) in which pits having T) and non-pits are repeated is included.
9. The evaluation method according to item 9. 52. A test pattern has a shortest pit length (m
5. A pit sequence (mT ++ mT) in which pits having T) and non-pits are repeated is included.
9. A method for evaluating an optical disc according to item 9. 53. The test pattern is the longest pit length (n
Pit sequence having pits having T) and non-pits repeated (nT ++ nT), pit having pits having the shortest pit length (mT) and pit sequence having non-pits repeated (mT ++ m)
T) and the shortest pit length sequence (mT + * mT) to the predetermined pit length sequence (8mT + * 8mT), and in the meantime, the pit lengths (m + 1) are not in a multiple relationship.
Pit sequence [(m + 1) T ++ (m + 1) T], [(m + 2) T +] in which pits and non-pits having T, (m + 2) T, (m + 4) T, and (m + 8) T are repeated
* (M + 2) T], [(m + 4) T ++ * (m + 4) T,
And ([m + 8) T ++ * (m + 8) T]. 54. As a test pattern, the shortest pit length sequence (mT + * mT) is repeated over one round of the optical disc, and the shortest pit length sequence (mT) corresponding to the center track is formed.
Pit length string [(m
+1) T ++ (m + 1) T] and pit length string [(m +
50. The optical disc evaluation method according to claim 49, wherein 2) T + * (m + 2) T] is repeated over one round of the optical disc. 55. The data area is defined between the lead-in area of the inner peripheral area and the lead-out area of the outer peripheral area, and the test pattern area is outside the lead-in area and in contact with the inner area portion and the lead. 50. It is provided in at least one of the outer area portions outside the out area and in contact with the area.
The method for evaluating an optical disk described in. 56. The data region is defined between a lead-in region of an inner peripheral region and a lead-out region of an outer peripheral region, and the test pattern region is outside the lead-in region and in contact with the inner region portion and the lead. 50. The optical disk evaluation method according to claim 49, wherein the evaluation method is provided in any of the outer area portions outside the out area and in contact with the area. 57. A channel pit length is T, and n and m
Is an integer, the pit has one of the shortest pit length (mT), the longest pit length (nT), and a predetermined pit length between the shortest pit length (mT) and the longest pit length (nT),
The non-pit has either the shortest non-pit length (* mT), the longest non-pit length (* nT), or the predetermined non-pit length between the shortest non-pit length (* mT) and the longest non-pit length (* nT). Then, a data conversion step of converting data to be recorded into pit data corresponding to the arrangement of the pits and the non-pits, and the shortest pit, the shortest non-pit, and the shortest pit length (mT) provided outside the data area. Generating a test signal corresponding to a test pattern related to a combination of a pit selected from pits having a predetermined pit length between the longest pit length (nT) and a non-pit corresponding to this pit; The test signal is recorded in the data area and in a test pattern area different from the data area of the optical disc as an array of pits and non-pits. Recording method for recording data on an optical disk characterized by comprising: a degree, the. 58. The test pattern has a maximum pit length (n
6. A pit sequence (nT ++ nT) in which pits having T) and non-pits are repeated is included.
A recording method for recording data on the optical disc according to 7. 59. The test pattern has a minimum pit length (m
6. A pit sequence (mT ++ mT) in which pits having T) and non-pits are repeated is included.
A recording method for recording data on the optical disc according to 7. 60. The test pattern has a maximum pit length (n
Pit sequence having pits having T) and non-pits repeated (nT ++ nT), pit having pits having the shortest pit length (mT) and pit sequence having non-pits repeated (mT ++ m)
T) and the shortest pit length sequence (mT + * mT) to the predetermined pit length sequence (8mT + * 8mT), and in the meantime, the pit lengths (m + 1) are not in a multiple relationship.
Pit sequence [(m + 1) T ++ (m + 1) T], [(m + 2) T +] in which pits and non-pits having T, (m + 2) T, (m + 4) T, and (m + 8) T are repeated
* (M + 2) T], [(m + 4) T ++ * (m + 4) T,
58. The recording method for recording data on an optical disc according to claim 57, further comprising: and [(m + 8) T ++ * (m + 8) T]. 61. As a test pattern, the shortest pit length sequence (mT + * mT) is repeated over one round of the optical disc, and the shortest pit length sequence (mT) corresponding to the center track is formed.
Pit length string [(m
+1) T ++ (m + 1) T] and pit length string [(m +
58. The recording method for recording data on an optical disc according to claim 57, wherein 2) T + * (m + 2) T] is repeated over one round of the optical disc. 62. The data area is defined between the lead-in area of the inner peripheral area and the lead-out area of the outer peripheral area, and the test pattern area is outside the lead-in area and in contact with the inner area portion and the lead. 58. It is provided in at least one of the outer area portions outside the out area and in contact with the area.
A recording method for recording data on the optical disc described in. 63. The data area is defined between the lead-in area of the inner peripheral area and the lead-out area of the outer peripheral area, and the test pattern area is outside the lead-in area and in contact with the inner area portion and the lead. 58. The recording method for recording data on an optical disc according to claim 57, wherein the recording method is provided in any of the outer area portions outside the out area and in contact with the area. 64. A pit is a shortest pit length (3T), a longest pit length (11T), and a predetermined pit length (4T, 5T, 6 between the shortest pit length (3T) and the shortest pit length (11T).
T, 7T, 8T, 9T, 10T) and the non-pit has the shortest non-pit length * 3T and the longest non-pit length * 11.
T and shortest non-pit length * 3 T and shortest non-pit length * 1
Predetermined non-pit length between 1T (* 4T, * 5T, * 6T,
The recording method for recording data on an optical disc according to claim 57, having any one of * 7T, * 8T, * 9T, * 10T). 65. A pit is a shortest pit length (4T), a longest pit length (18T), and a predetermined pit length (5T, 6T, 7) between the shortest pit length (4T) and the shortest pit length (18T).
T, 8T, 9T, 10T, 11T, 12T, 13T, 1
4T, 15T, 16T, 17T), and the non-pit has the shortest non-pit length (* 4T), the longest non-pit length (* 18T), the shortest non-pit length (* 4T), and the shortest non-pit length (* 4T). Predetermined non-pit length (* 5T) (* 5T)
T, * 6T, * 7T, * 8T, * 9T, * 10T, * 1
1T, * 12T, * 13T, * 14T, * 15T, * 1
58. The recording method for recording data on an optical disc according to claim 57, having any one of 6T and * 17T). 66. A channel pit length is T, and n and m
Is an integer, the pit has one of the shortest pit length (mT), the longest pit length (nT), and a predetermined pit length between the shortest pit length (mT) and the longest pit length (nT),
The non-pit has either the shortest non-pit length (* mT), the longest non-pit length (* nT) or a predetermined non-pit length between the shortest non-pit length (mT) and the longest non-pit length (* nT). Data conversion means for converting data to be recorded into pit data corresponding to the arrangement of the pits and the non-pits, and the shortest pit, the shortest non-pit, the shortest pit length (mT), and the longest provided outside the data area. Test signal generating means for generating a test signal corresponding to a test pattern associated with a pit selected from pits having a predetermined pit length between pit lengths (nT) and a non-pit corresponding to this pit, and the pit data. Arrangement of pits and non-pits in the data area of the optical disc and the test signal in a test pattern area different from the data area of the optical disc. It is provided with a recording means for recording Te recording apparatus for recording data on an optical disk according to claim. 67. A test pattern has a maximum pit length (n
7. A pit string (nT ++ nT) in which pits having T) and non-pits are repeated is included.
A recording device for recording data on the optical disc according to 6. 68. A test pattern has a shortest pit length (m
7. A pit sequence (mT ++ mT) in which pits having T) and non-pits are repeated is included.
A recording device for recording data on the optical disc according to 6. 69. A test pattern has a maximum pit length (n
T) pits with repeated pits and non-pits (nT ++ nT), pits with shortest pit length (* mT) and repeated pits with non-pits (mT ++)
mT) and the shortest pit length sequence (mT + * mT) to the predetermined pit length sequence (8mT + * 8mT), and in the meantime, the pit lengths (m + 1) are not in a multiple relationship.
Pit sequence [(m + 1) T ++ (m + 1) T], [(m + 2) T +] in which pits and non-pits having T, (m + 2) T, (m + 4) T, and (m + 8) T are repeated
* (M + 2) T], [(m + 4) T ++ * (m + 4) T,
And ([m + 8) T ++ * (m + 8) T]. 70. As a test pattern, the shortest pit length string (mT + * mT) is repeated over one round of the optical disc, and the shortest pit length string (mT) corresponding to the center track is formed.
Pit length string [(m
+1) T ++ (m + 1) T] and pit length string [(m +
The recording device for recording data on an optical disc according to claim 66, characterized in that 2) T + * (m + 2) T] is repeated over one round of the optical disc. 71. The data area is defined between a lead-in area of an inner peripheral area and a lead-out area of an outer peripheral area, and the test pattern area is outside the lead-in area and in contact with the inner area portion and the lead. 67. The recording device for recording data on the optical disc according to claim 66, which is provided in at least one of an outer area portion outside the out area and in contact with the outer area. 72. The data area is defined between the lead-in area of the inner peripheral area and the lead-out area of the outer peripheral area, and the test pattern area is outside the lead-in area and in contact with the inner area portion and the lead. 67. The recording device for recording data on an optical disc according to claim 66, wherein the recording device is provided in any of the outer area portions outside the out area and in contact with the area. 73. A pit is a shortest pit length (3T), a longest pit length (11T), and a predetermined pit length (4T, 5T, 6 between the shortest pit length (3T) and the shortest pit length (11T).
T, 7T, 8T, 9T, 10T) and the non-pit has the shortest non-pit length * 3T and the longest non-pit length * 11.
T and shortest non-pit length * 3 T and shortest non-pit length * 1
Predetermined non-pit length between 1T (* 4T, * 5T, * 6T,
The recording device for recording data on the optical disc according to claim 66, having any one of * 7T, * 8T, * 9T, and * 10T). 74. A pit is a shortest pit length (4T), a longest pit length (18T), and a predetermined pit length (5T, 6T, 7) between the shortest pit length (4T) and the shortest pit length (18T).
T, 8T, 9T, 10T, 11T, 12T, 13T, 1
4T, 15T, 16T, 17T), and the non-pit has the shortest non-pit length (* 4T), the longest non-pit length (* 18T), the shortest non-pit length (* 4T), and the longest non-pit length (* 4T). Predetermined non-pit length (* 5T) (* 5T)
T, * 6T, * 7T, * 8T, * 9T, * 10T, * 1
1T, * 12T, * 13T, * 14T, * 15T, * 1
67. The recording device for recording data on the optical disc according to claim 66, having any one of 6T and * 17T). 75. A pit and a land according to an integer multiple of this, where T is the channel pit length, and 3 <n <m <k, where n, m, and k are integers, the pit has the shortest pit length ( 3T), the longest pit length (kT), and the shortest pit length (3T) and the longest pit length (kT), and the non-pits have the shortest non-pit length * 3T and the longest non-pit length (* kT) and a non-pit length between the shortest non-pit length * 3T and the longest non-pit length (* kT), and a data area in which data is recorded in a combination of the arrangement of the pits and the non-pits, A pit provided outside this data area and having one pit length of 3T, mT, and nT, and a length of 3T, m
Land having another land length of T, nT, pit having the remaining one pit length of length 3T, mT, nT, one land length of length 3T, mT, nT A pit having a length of 3T, a pit having another pit length of 3T, mT, and nT and a pit land selected from a land having the remaining one land length of mT and nT. And a test pattern area having 76. The optical disk according to claim 75, wherein the data area is defined between a lead-in area of an inner peripheral area and a lead-out area of an outer peripheral area, and the test pattern area is provided in the lead-in area. . 77. m, n ≧ 6 and m ≦ n, m, n ≦
76. The optical disc according to claim 75, wherein 14 (= k). . 78. The shortest pit length is 3T, the longest pit length is 14T, and the shortest pit length is 3T and the longest pit length is 14T.
Predetermined pit length between T 4T, 5T, 6T, 7T, 8T, 9
It has any of T, 10T, 11T, 12T, and 13T, and the non-pit is a predetermined non-pit length * 3T, the longest non-pit length * 14T, and the shortest non-pit length * 3T and the shortest non-pit length * 14T. Non-pit length * 4T, * 5T, * 6
T, * 7T, * 8T, * 9T, * 10T, * 11T, *
76. The optical disc according to claim 75, which has either 12T or * 13T. 79. A pit length of 3T in the test pattern area
Pit, land with land length * 6T (m = 6),
Pit with a pit length of 7T (n = 7), land length * 3T, pit with a pit length of 6T (m = 6) and land length *
The optical disk according to claim 75, wherein a repetitive array of 7T (n = 7) lands is recorded. 80. A pit having a pit length of 3T and a land length * 6T
Land with (m = 6) and pit length 7T (n = 7)
80. The optical disc according to claim 79, wherein the array of pits corresponds to the code word “0010000010000001”. 81. The repetition of the pits and lands is m
= 6 and n = 7 and 3T- * 6T-7T- * 3T-
6T- * 7T, 3T- * 7T-6T- * 3T-7T- *
6T, 6T- * 3T-7T- * 6T-3T- * 7T, 7
T- * 3T-6T- * 7T-3T- * 6T, 6T- * 7
T-3T- * 6T-7T- * 3T, 7T- * 6T-3T
76. The optical disc according to claim 75, having one selected from the group of-* 7T-6T- * 3T. 82. A reproduction signal of a test pattern and data from an optical disc having a data area in which pits and non-pits are arranged according to recording data and a test pattern in which the pits and non-pits are arranged based on a predetermined arrangement rule. Read-out means for optically reading out as, a detection means for detecting an error rate of the reproduction signal read out from the test pattern, and a correction means for correcting the reproduction signal so as to minimize the error rate. An optical disk reproducing apparatus characterized by: 83. The optical disc comprises pits and lands each having a channel pit length of T and an integer multiple of T.
3 <n <m <k, where n, m, and k are integers,
Shortest pit length (3T), longest pit length (kT)
And shortest pit length (3T) and longest pit length (kT)
The non-pits have any of the pit lengths between them, and the non-pits are the shortest non-pit length * 3T, the longest non-pit length (* kT), and the non-pit length between the shortest non-pit length * 3T and the longest non-pit length (* kT). And a data area in which data is recorded in a combination of this pit and non-pit arrangement, and one pit length provided outside the data area and having a length of 3T, mT, or nT. With pit, length 3T, m
Land having another land length of T, nT, pit having one remaining pit length of length 3T, mT, nT, one land length of length 3T, mT, nT A pit having a length of 3T, a pit having another pit length of 3T, mT, and nT and a pit land selected from a land having the remaining one land length of mT and nT. 83. The optical disk reproducing apparatus according to claim 82, further comprising: 84. The data area is defined between a lead-in area of an inner peripheral area and a lead-out area of an outer peripheral area, and the test pattern area is provided in the lead-in area. 83. An optical disk reproducing device according to 83. 85. m, n ≧ 6 and m ≦ n, m, n ≦
The optical disk reproducing apparatus according to claim 83, wherein 14 (= k). 86. The shortest pit length is 3T, the longest pit length is 14T, and the shortest pit length is 3T and the longest pit length is 14T.
Predetermined pit length between T 4T, 5T, 6T, 7T, 8T, 9
It has any of T, 10T, 11T, 12T, and 13T, and the non-pit is a predetermined non-pit length * 3T, the longest non-pit length * 14T, and the shortest non-pit length * 3T and the shortest non-pit length * 14T. Non-pit length * 4T, * 5T, * 6
T, * 7T, * 8T, * 9T, * 10T, * 11T, *
85. The optical disc reproducing apparatus according to claim 84, having either 12T or * 13T. 87. A pit length of 3T in the test pattern area
Pit, land with land length * 6T (m = 6),
Pit with a pit length of 7T (n = 7), land length * 3T, pit with a pit length of 6T (m = 6) and land length *
The optical disk reproducing apparatus according to claim 83, wherein a repetitive array of 7T (n = 7) lands is recorded. 88. Pit with a pit length of 3T, land length * 6T
Land with (m = 6) and pit length 7T (n = 7)
84. The optical disk reproducing apparatus according to claim 83, wherein the pits of the above are equivalent to the code word "0010000010000001". 89. The repetition of the pits and lands is m
= 6 and n = 7 and 3T- * 6T-7T- * 3T-
6T- * 7T, 3T- * 7T-6T- * 3T-7T- *
6T, 6T- * 3T-7T- * 6T-3T- * 7T, 7
T- * 3T-6T- * 7T-3T- * 6T, 6T- * 7
T-3T- * 6T-7T- * 3T, 7T- * 6T-3T
The optical disk reproducing device according to claim 83, wherein the optical disk reproducing device has one selected from the group of-* 7T-6T- * 3T. 90. A data area in which pits and non-pits are arranged according to recording data, and a test pattern in which the pits and non-pits are arranged based on a predetermined arrangement rule, and a reproduction signal of a test pattern and data from an optical disc. As an optical read-out, a step of detecting the error rate of the reproduced signal read from the test pattern, and a step of correcting the reproduced signal read from the data area so as to minimize the error rate. A method for reproducing an optical disc, comprising: 91. The optical disk comprises pits and lands each having a channel pit length of T and an integer multiple of T.
3 <n <m <k, where n, m, and k are integers,
Shortest pit length (3T), longest pit length (kT)
And shortest pit length (3T) and longest pit length (kT)
The non-pits have any of the pit lengths between them, and the non-pits are the shortest non-pit length * 3T, the longest non-pit length (* kT), and the non-pit length between the shortest non-pit length * 3T and the longest non-pit length (* kT). And a data area in which data is recorded in a combination of this pit and non-pit arrangement, and one pit length provided outside the data area and having a length of 3T, mT, or nT. With pit, length 3T, m
Land having another land length of T, nT, pit having the remaining one pit length of length 3T, mT, nT, one land length of length 3T, mT, nT A pit having a length of 3T, a pit having another pit length of 3T, mT, and nT and a pit land selected from a land having the remaining one land length of mT and nT. 91. The optical disc reproducing method according to claim 90, further comprising: 92. The data area is defined between a lead-in area of an inner peripheral area and a lead-out area of an outer peripheral area, and the test pattern area is provided in the lead-in area. 90. A method for reproducing an optical disc according to item 90. 93. m, n ≧ 6 and m ≦ n, m, n ≦
91. The method for reproducing an optical disc according to claim 90, wherein 14 (= k). 94. The shortest pit length is 3T, the longest pit length is 14T, and the shortest pit length is 3T and the shortest pit length is 14T.
Predetermined pit length between T 4T, 5T, 6T, 7T, 8T, 9
It has any of T, 10T, 11T, 12T, and 13T, and the non-pit is a predetermined non-pit length * 3T, the longest non-pit length * 14T, and the shortest non-pit length * 3T and the shortest non-pit length * 14T. Non-pit length * 4T, * 5T, * 6
T, * 7T, * 8T, * 9T, * 10T, * 11T, *
94. The method for reproducing an optical disc according to claim 93, which has either 12T or * 13T. 95. A pit length of 3T in the test pattern area
Pit, land with land length * 6T (m = 6),
Pit with a pit length of 7T (n = 7), land length * 3T, pit with a pit length of 6T (m = 6) and land length *
The method of reproducing an optical disc according to claim 90, wherein a repetitive array of 7T (n = 7) lands is recorded. 96. A pit having a pit length of 3T and a land length * 6T
Land with (m = 6) and pit length 7T (n = 7)
91. The method for reproducing an optical disc according to claim 90, wherein the pit array of is equivalent to the code word “0010000010000001”. 97. The repetition of the pits and lands is m
= 6 and n = 7 and 3T- * 6T-7T- * 3T-
6T- * 7T, 3T- * 7T-6T- * 3T-7T- *
6T, 6T- * 3T-7T- * 6T-3T- * 7T, 7
T- * 3T-6T- * 7T-3T- * 6T, 6T- * 7
T-3T- * 6T-7T- * 3T, 7T- * 6T-3T
The method for reproducing an optical disc according to claim 90, characterized in that it has one selected from the group of-* 7T-6T- * 3T. 98. A pit and a land which are an integral multiple of this, where T is the channel pit length, and 3 <n <m <k, where n, m, and k are integers, the pit has the shortest pit length ( 3T), the longest pit length (kT), and the shortest pit length (3T) and the longest pit length (kT), and the non-pits have the shortest non-pit length * 3T and the longest non-pit length (* kT) and the non-pit length between the shortest non-pit length * 3T and the longest non-pit length (* kT), and the data to be recorded in the pit data corresponding to the combination of this pit and the non-pit array. A data conversion step of converting, and a pit provided outside this data area and having a pit length of one of the lengths 3T, mT, and nT, the length 3T, m
Land having another land length of T, nT, pit having the remaining one pit length of length 3T, mT, nT, one land length of length 3T, mT, nT Recorded as a repeating array of pits selected from among lands having a length of 3T, pits having a length of 3T, another pit length of mT, and nT and lands having a remaining length of one land of mT, nT. A recording method for recording data on an optical disc, comprising: 99. The recording according to claim 98, wherein the data area is defined between a lead-in area of an inner peripheral area and a lead-out area of an outer peripheral area, and the test pattern area is provided in the lead-in area. Method. 100. m, n ≧ 6 and m ≦ n, m, n
The recording method according to claim 98, wherein ≦ 14 (= k). 101. The shortest pit length is 3T, the longest pit length is 14T, and the shortest pit length is 3T and the shortest pit length is 1.
Predetermined pit length between 4T 4T, 5T, 6T, 7T, 8T,
It has any of 9T, 10T, 11T, 12T, and 13T, and the non-pit has a predetermined non-pit length * 3T, the longest non-pit length * 14T, and the shortest non-pit length * 3T and the shortest non-pit length * 14T. Non-pit length * 4T, * 5T, * 6
T, * 7T, * 8T, * 9T, * 10T, * 11T, *
The recording method according to claim 98, comprising either 12T or * 13T. 102. A pit length of 3 in the test pattern area
T pit, land with land length * 6T (m = 6), pit with land length 7T (n = 7), land length * 3T
99. The recording method according to claim 98, wherein a repetitive array of the lands, the pits having a pit length of 6T (m = 6), and the lands having a land length of * 7T (n = 7) is recorded. 103. A pit having a pit length of 3T and a land length * 6
Land with T (m = 6) and pit length 7T (n =
The arrangement of pits in 7) is the code word "0010000010000001".
The recording method according to claim 98, which corresponds to ". 104. The repetition of the pits and lands comprises:
m = 6 and n = 7 and 3T- * 6T-7T- * 3T
-6T- * 7T, 3T- * 7T-6T- * 3T-7T-
* 6T, 6T- * 3T-7T- * 6T-3T- * 7T,
7T- * 3T-6T- * 7T-3T- * 6T, 6T- *
7T-3T- * 6T-7T- * 3T, 7T- * 6T-3
1 selected from the group of T- * 7T-6T- * 3T
The recording method according to claim 98, wherein the recording method comprises: 105. A pit and a land according to an integer multiple of this, where T is the channel pit length, and 3 <n <m <k, where n, m, and k are integers, the pit has the shortest pit length ( 3T), the longest pit length (kT), and the shortest pit length (3T) and the longest pit length (kT), and the non-pits have the shortest non-pit length * 3T and the longest non-pit length (* kT) and the non-pit length between the shortest non-pit length * 3T and the longest non-pit length (* kT), and the data to be recorded in the pit data corresponding to the combination of this pit and the non-pit array. Data conversion means for converting, and a pit provided outside the data area and having a pit length of one of the lengths 3T, mT, and nT, the length 3T, m
Land having another land length of T, nT, pit having the remaining one pit length of length 3T, mT, nT, one land length of length 3T, mT, nT Recorded as a repeating array of pits selected from among lands having a length of 3T, pits having a length of 3T, another pit length of mT, and nT and lands having a remaining length of one land of mT, nT. A recording device for recording data on an optical disc, comprising: recording means. 106. The data area is defined between a lead-in area of an inner peripheral area and a lead-out area of an outer peripheral area,
The recording apparatus according to claim 105, wherein the test pattern area is provided in the lead-in area. 107. m, n ≧ 6 and m ≦ n, m, n
The recording apparatus according to claim 105, wherein ≦ 14 (= k). 108. The shortest pit length is 3T, the longest pit length is 14T, and the shortest pit length is 3T and the shortest pit length is 1.
Predetermined pit length between 4T 4T, 5T, 6T, 7T, 8T,
It has any of 9T, 10T, 11T, 12T, and 13T, and the non-pit has a predetermined non-pit length * 3T, the longest non-pit length * 14T, and the shortest non-pit length * 3T and the shortest non-pit length * 14T. Non-pit length * 4T, * 5T, * 6
T, * 7T, * 8T, * 9T, * 10T, * 11T, *
The recording apparatus according to claim 105, comprising either 12T or * 13T. 109. A pit length of 3 in the test pattern area
T pit, land with land length * 6T (m = 6), pit with land length 7T (n = 7), land length * 3T
106. The recording apparatus according to claim 105, wherein a repetitive array of the lands, the pits having a pit length of 6T (m = 6), and the lands having a land length of * 7T (n = 7) is recorded. 110. A pit having a pit length of 3T and a land length * 6
Land with T (m = 6) and pit length 7T (n =
The arrangement of pits in 7) is the code word "0010000010000001".
The recording apparatus according to claim 105, which corresponds to “. 111. The repetition of the pits and lands comprises:
m = 6 and n = 7 and 3T- * 6T-7T- * 3T
-6T- * 7T, 3T- * 7T-6T- * 3T-7T-
* 6T, 6T- * 3T-7T- * 6T-3T- * 7T,
7T- * 3T-6T- * 7T-3T- * 6T, 6T- *
7T-3T- * 6T-7T- * 3T, 7T- * 6T-3
1 selected from the group of T- * 7T-6T- * 3T
106. The recording device according to claim 105, comprising one.