JP2003091828A - Method for formatting disk optical information recording medium, the disk optical information recording medium, seeking method of the same and driving device of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for formatting a disk optical information recording medium, which enables great shortening of time to reach a target track, and high-speed access to an optional address, the disk optical information recording medium, the seeking method of the same, and the driving device of the same. SOLUTION: A control operation to a predetermined rotating speed is started for the disk optical information recording medium, an optical pickup is focused on an information recording/reproducing surface and tracked to an information track, and the track number of a current track is specified by using phase difference information between adjacent track marks using track mark groups A, B. Determination is made as to whether the information of the reached target track is a target track or not and, if it is a target track, the process waits until the rotating speed of an optical disk medium reaches a specified rotating speed while maintaining the pickup on the target track. When the predetermined rotating speed is reached, a seeking operation is completed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seek method for a disc-shaped optical information recording medium for recording / reproducing a digital signal,
In particular, a track mark formatting method of a disc-shaped optical information recording medium for identifying the track number of a current track from phase difference information between adjacent tracks obtained from track marks formed at equal intervals on a land, disc-shaped optical information recording medium , A disc-shaped optical information recording medium drive device, and a disc-shaped optical information recording medium.

[0002]

2. Description of the Related Art In recent years, various DVD media such as DVD-ROM, DVD-R and DVD-RAM have been attracting attention as large-capacity optical disk media. The demand for increased storage capacity continues to be sought, and it is being considered to make the pitch narrower and the pit smaller. Recently, regarding the increase in capacity, CLV (constant linear velocity; Constant Linear Velocity) where the linear density of information becomes constant
y) Formats are becoming mainstream. This CLV
Regarding the format, in Japanese Patent Laid-Open No. 6-228850, an optical disk of CLV format is rotated at a constant speed in the seek mode, and the target time data is the transit time between adjacent (on the same track) mirror portions of the target track. Is measured and compared with a target passage time, and a head seek mechanism of an optical disk drive device for controlling the head feed position so as to match these is described. Further, Japanese Patent Laid-Open No. 10-241265 discloses a method for detecting a reproduction position of a disk device in which a disk is divided into zones in a radial direction and a circumferential direction, the disk is rotated at a constant speed, and the zone is specified from a cycle of a sector signal. A seek operation control method is described and shown.

In Japanese Patent Laid-Open No. 6-231469, a PWM (pit width modulation) recording method has come to be adopted in order to increase the capacity of an optical disk in recent years, and there is a possibility of erroneous detection of a conventional sector mark. The optical disc format is described as a solution to the increasing cost. This optical disc format is characterized by using address ID data recorded by PPM (pit position modulation) by phase encoding (PE) in a CLV system disc system, and these data are recorded by PWM (pulse width modulation). Since there is almost no correlation with the recorded data part, sector synchronization and address I
D can be detected simultaneously and satisfactorily.
The linear velocity of the track can be estimated on the basis of the pulse width given by, and high-speed access can be realized.

Further, Japanese Patent No. 2689980 discloses that
Regarding seek control in a CLV format disc, from a wobbling track of an optical disc formed by modulating a wobbling signal of a predetermined frequency with coded address information of a frequency lower than this and wobbling corresponding to the modulated signal. , A seek control method for extracting address information and controlling a seek operation is described. Japanese Patent Laid-Open No. 5-266497 discloses a CLV format disc in which a short-distance access offset value and a long-distance access offset value are programmed in advance, and the offset value is selectively used according to the distance to the access destination to perform a track jump. The method of accessing an optical disk for increasing the access speed is described. In Japanese Unexamined Patent Publication No. 9-16980, only the moving direction of the optical head is determined, and the preceding optical head transfer means is driven, and then the current position (track number) corresponding to the current address and the target corresponding to the access target address. There is described an information access method for a CLV optical disc in which a position (track number) is calculated and the number of tracks between them is calculated to perform access control.

Japanese Patent Laid-Open No. 2000-137949 discloses that
By setting the sector length to be an integral multiple of 2 * π * (track pitch) length, the CLV format in which the sector head positions are aligned at equal track intervals on a certain radial line, and the data area head sector in the aligned sector The CLV format that is intended to be included is described. Further, Japanese Patent Laid-Open No. 2000-268369 discloses a CLV in which track marks are arranged at equal physical length intervals on a spiral track.
In the disk format, there is described a CLV disk format in which track position information can be obtained by measuring a track mark length and a distance between adjacent track marks. Further, in Japanese Patent Laid-Open No. 2000-348356, track position information can be obtained by measuring the distance between adjacent track marks in a CLV disk format disk in which track marks are arranged at equal physical length intervals on a spiral track. A track access method using what is possible and a hardware configuration for realizing this access method are described. Further, a method of acquiring phase difference information between adjacent track marks in a CLV format disc provided with track marks, a seek method using the phase difference information between the adjacent track marks and rough radial position information, and a seek method including track jumps, and The device configuration and the like have also been proposed. In addition, in CLV master exposure by the CLV drive control method, evaluation and control of CLV drive that performs drive control based on the basic clock of the formatter corresponding to the minimum unit length that constitutes the format, and a method for manufacturing a CLV disk are also proposed. ing.

[0006]

However, in the conventional seek operation, the number of tracks to be moved, which is the difference between the present track number and the target track number, is calculated, and then the track jump or seek operation is performed. Since it takes time to calculate the logical information number and the physical track position for accessing information on the disc recorded by the CLV method, the access time is delayed. Further, in the CLV format, when an attempt is made to access a certain sector, the rotation speed of the spindle motor rotating the disk is changed according to the disk radial position where the sector exists, and the scanning linear velocity of the reproduction track is constant. It is necessary to control so that After linear velocity control,
Information will be read and written.

On the other hand, CAV (constant angular velocity; Consta
nt Angular Velocity, in which the disc is rotated at a constant speed) Format is inferior in terms of capacity increase, but each sector is aligned on the radius line of the disc (see FIG. 18A), and which sector is used during reproduction. It is possible to access at the same disk rotation speed, and it has excellent accessibility. In addition, M that incorporates the large capacity of the CLV format and the high-speed accessibility of the CAV format
There is also a CAV format (see FIG. 18 (b)). This is provided in a plurality of zones in the radial direction of the disc, one track is divided into a plurality of sectors in each zone, and the number of divided sectors is increased as it goes to the zone on the outer periphery of the disc. The distribution of information amount is approximated to the distribution of information amount in CLV format. Then, each sector is aligned in the radial direction for each zone, and when moving between zones, it is necessary to change the frequency of the recording / reproducing clock while changing the disk rotation speed or keeping the rotation speed constant. Is a format that enables high-speed accessibility of the CAV format. In addition, although a method of recording / reproducing a CLV format disc as it is in a CAV drive state has been proposed, in this case, it is necessary to appropriately adjust the data read clock according to the read radial position. FIG. 18C shows sector arrangement, CAV format and MCA in the CLV format disc.
V (Modified Constant Angul)
ar Velocity) format.

Here, an access method for the above formats will be described. First, the CLV format will be described. The physical format formed on the information track is formed with a constant linear velocity (formed with the same physical length), and when recording / reproducing information, it is necessary to control the disk rotation speed according to the radial position. For a track at a specific disk radial position or a track at a certain radial position where the pickup is currently located, the disk rotation speed is controlled so that the track scanning linear velocity becomes a predetermined value by using a cycle of a specific reproduction data signal. Alternatively, the disc rotation speed is controlled so that the track scanning linear velocity becomes a predetermined value by using a wobble signal obtained from the meandering of a constant cycle which is previously incorporated in the track when the master is manufactured. At this controlled stage, the address information is decoded by the specified recording / reproducing clock to obtain the current address value. Then, the seek operation is started from the difference from the target address. It is necessary to control the rotation of the disc so that the linear velocity becomes constant every time the pickup moves, and then the operation of obtaining address information is repeated.

In the CLV format, generally,
Even if the difference in linear velocity setting at the time of manufacturing the master disk or the same setting is intended, the arrangement of each sector is different in each disk due to a slight linear velocity error. Therefore, the seek operation assumes a place with a target address, moves while counting the number of traversing tracks, acquires the address value again when reaching the assumed track, finds the difference from the target address, and if different, Again, assuming the target address position, the above operation is repeated until the target address is reached. At this time, the disc rotation speed is constantly controlled according to the reproduction address position.

Next, the CAV format will be described. The physical format formed on the information track is formed at a constant angular velocity, and the disc is rotated at a constant number of revolutions when recording and reproducing information. The disk rotation speed is raised to a predetermined rotation speed. At this point, the address information of the arbitrary track can be obtained. The address value is obtained, and the seek operation is performed from the difference from the target address. In the CAV format, since the arrangement of each sector is clear, it is possible to reach the target address accurately and at high speed only by counting the number of traversing tracks during the seek operation. At this time, CLV
It is not necessary to control the disk rotation speed as in the format, but in this case as well as in the case of the CLV format, when obtaining the current address value, the disk rotation speed is raised to a predetermined rotation speed and the address information is read. That procedure is required.

Next, the MCAV format will be described. The physical format formed in the information track is formed with a constant angular velocity, but is divided into several zones in the radial direction, and the number of sectors formed per track increases as the zone goes to the outer circumference. When recording / reproducing information, it is necessary to switch the recording / reproducing clock for each zone. The arrangement of sectors having each address is clearly defined. Therefore, the seek operation to the target address can be performed accurately and at high speed as in the CAV format. However, the seek operation across the zones requires control of the recording / reproducing clock frequency. Also in this case, in order to obtain the current address value which is the first operation of the seek operation, it is necessary to raise the disk rotation speed to the predetermined rotation speed.

As described above, in each format, it is necessary to reduce the time and speed when acquiring the address information. For example, in the seek control method described in Japanese Patent No. 2689980, regarding the seek operation to the target track, the disk rotation control according to the radial position of the disk and the reproduction of the address information prerecorded as the wobbling track are performed. It is used as a standard. According to the optical disk access method disclosed in Japanese Patent Laid-Open No. 5-266497, a short distance access offset value and a long distance access offset value are programmed in advance in a CLV format disk to determine the distance to the access destination. According to the above, the offset value is selectively used to perform the track jump to increase the access speed.

Further, in Japanese Patent Laid-Open No. 9-16980,
The information access of the conventional optical disk reproducing apparatus is mounted on the optical head after roughly moving at high speed (coarse seek operation) by a linear motor or a feed screw mechanism that drives the optical head in the disk radial direction. The beam jump for information reading is precisely positioned by the track jump by the actuator of the objective lens (dense seek operation). In order to increase the information access speed, it is important to control the movement of the optical head at high speed and accurately. However, in the case where the arrangement of information on the optical disk is a constant linear velocity (CLV) system, one track depends on the radial position on the disk. Since the amount of information above is different, it becomes difficult to convert the information number and the number of tracks. Further, in the trend of increasing the capacity, as the track pitch becomes narrower and the information pit becomes smaller, it becomes more difficult to convert the information number and the number of tracks.

In any of the above-mentioned conventional techniques, at the beginning of the seek operation in any case, the access is performed on the basis of the disk rotation control according to the radial position of the disk and the reproduction of the address information previously recorded as the wobbling track. Is being done. In addition, JP-A-6-2
In both of the conventional techniques of the head seek mechanism of the optical disk drive device described in Japanese Patent No. 82850, the reproducing position detection method and the seek operation control method of the disk device described in Japanese Patent Application Laid-Open No. 10-241265, the disk is rotated at a predetermined rotational speed. However, the seek operation of the head or the zone specification is performed by using the sector signal or the like on the same track.

Further, conventionally, a single track mark sequence formed at a constant physical length interval is formed on the land portion along a spirally formed groove track for recording and reproducing information, and the single track mark sequence is formed. In the method of identifying the track number of the current track by using the phase difference information between adjacent track marks obtained from the track mark sequence, the phase difference information between adjacent track marks is the same in the radial direction of the disc-shaped information recording medium. Since a plurality of tracks having the phase difference information between the track marks appeared and the tracks could not be specified, the radial position detecting means is used to track the track using the rough radial position information and the phase difference information between the adjacent track marks. I was trying to identify the number. In addition, in the method of forming a plurality of track mark series, there is a possibility that interference may occur between the track marks of the series (track marks are struck at the same place). Furthermore, a long-period track mark is included in a plurality of track mark sequences. Comparing the time required to specify the track number of the phase difference information between adjacent track marks with the long cycle track mark and the time required to specify the track number of the phase difference between adjacent track marks with the short cycle track mark, the shorter cycle is The time required to acquire the phase difference information is short, and a short cycle is advantageous in the entire seek operation. However, when the long-period track mark length is shortened, there occurs a problem that the track number cannot be specified only from the phase difference information between adjacent track marks (a plurality of tracks exist).

When the sector length and the mark length do not match, a complicated operation is required to obtain the track number on the physical format formed as the CLV disk format from the track number obtained from the phase difference information between adjacent track marks. Will be needed. In the MCAV disc format, the information area is divided into several areas by the radius method and the storage capacity is increased by increasing the number of sectors per track circumference toward the outer circumference (FIG. 19).
reference). When recording / reproducing information on / from an information track of such MCAV disc format, the disc is rotated at a constant number of revolutions, and zone information is acquired from synchronization pattern information or the like given to each zone divided in the radial direction. An information recording / reproducing clock is generated according to the zone information, address information is acquired, a target information sector is reached, and a recording / reproducing operation is performed.
Therefore, it takes a lot of time to reach the target information track.

Therefore, the first object of the present invention is that the disk-shaped information recording medium may be rotated at any rotation speed during the seek operation, and when the rotation speed is raised, when the rotation speed is constant, or when the CLV format disk is used. Since the seek operation is possible even while converging on the target rotation speed for the target address that occurs during seek operation, the time to reach the target track can be greatly shortened and high-speed access to any address is possible. A method for formatting a track mark, an optical disc medium (a disc-shaped optical information recording medium) on which a track mark conforming to the track mark format is formed, a seek method using the track mark, and an optical disc drive device enabling a seek operation are provided. Is to provide. A second object of the present invention is to provide a track mark formatting method which can specify the track number of the current track from the phase difference information between adjacent track marks without requiring the radial position information. A third object of the present invention is to provide a track mark formatting method capable of forming a plurality of track mark sequences without interference.

A fourth object of the present invention is to provide a disc-shaped optical information recording medium equipped with a track mark formatting method which does not require radial position information and enables high speed seek operation. A fifth object of the present invention is to seek a disk-shaped optical information recording medium capable of reaching a target track by using phase difference information between adjacent track marks in a plurality of track mark series in the disk-shaped optical information recording medium. Is to provide a method. A sixth object of the present invention is to provide an optical disk drive for a disk-shaped optical information recording medium which realizes a seek method capable of reaching a target track by using phase difference information between adjacent track marks in a plurality of track mark series. It is to provide a device. A seventh object of the present invention is to provide a method of formatting a track mark in which a current track can be identified from only a plurality of track mark sequences using a relatively short long period track mark.

An eighth object of the present invention is to provide a disk-shaped optical information recording medium equipped with a track mark formatting method that enables high-speed seek operation without requiring radial position information. A ninth object of the present invention is to reach a target track in a disc-shaped optical information recording medium by using phase difference information between a plurality of track mark series and phase difference information between adjacent track marks in each track mark series. It is to provide a seek method for a disc-shaped optical information recording medium which can be performed. A tenth object of the present invention is to provide a disc-shaped optical information recording medium to a target track by using phase difference information between a plurality of track mark series and phase difference information between adjacent track marks in each track mark series. An object of the present invention is to provide an optical disk drive device that realizes a seek method that can be reached.

An eleventh object of the present invention is to apply the track mark format to a disc-shaped optical information recording medium in which the physical format formed on the information recording / reproducing track is the CLV disk format, and the distance between adjacent track marks is increased. It is an object of the present invention to provide a method of formatting a track mark in which the track number obtained from the phase difference information and the track number on the physical format formed as the CLV disc format have good consistency. A twelfth object of the present invention is to apply a track mark formatting method to a disk-shaped optical information recording medium equipped with a CLV disc format, and obtain a track number and a CLV disc format obtained from phase difference information between adjacent track marks. It is an object of the present invention to provide a disc-shaped optical information recording medium in which the track numbers on the formed physical format are well matched.

A thirteenth object of the present invention is to specify the track number of the current track in the MCAV format disc by using the track mark phase difference information between a plurality of track mark sequences and the phase difference information between adjacent track marks. It is an object of the present invention to provide a method of formatting a track mark that can acquire the zone number at the same time. A fourteenth object of the present invention is to apply a track mark formatting method to a disc-shaped optical information recording medium equipped with an MCAV disc format, and to provide track mark phase difference information between a plurality of track mark sequences and respective adjacent tracks. Using the phase difference information between marks,
It is an object of the present invention to provide a disc-shaped optical information recording medium capable of acquiring the zone number at the same time when the track number of the current track is specified.

[0022]

According to a first aspect of the present invention, there is a disc shape capable of recording and reproducing optical information, which has track marks formed at regular intervals on lands along an equal pitch spiral track. In a method of formatting an optical information recording medium, a first step of forming a plurality of track marks on the land portion at a constant interval, and a plurality of track marks formed at a constant interval by the first step at predetermined intervals And a second step of simultaneously forming a plurality of sets of track mark series having a predetermined interval of the track mark series and an interval between different track marks. 1 and the second object described above are achieved.

According to a second aspect of the present invention, in the first aspect of the present invention, the second step includes: a predetermined track mark sequence having the shortest track mark interval among a plurality of sets of track mark sequences; By forming a plurality of sets of track mark series in which the track mark interval is an integral multiple of the shortest track mark interval,
And to achieve the third object.

According to a third aspect of the present invention, there is provided a disk-shaped optical information recording medium which has track marks formed at regular intervals on a land portion along an equal pitch spiral track and which is capable of recording and reproducing optical information. The track mark is
The track mark formed by the method for formatting a disc-shaped optical information recording medium according to claim 1 or 2 achieves the first and fourth objects.

According to a fourth aspect of the present invention, in the seek method for the disc-shaped optical information recording medium according to the third aspect, the rotation of the disc-shaped optical information recording medium is controlled, and the disc-shaped optical information recording medium is controlled. A first step of obtaining track mark phase difference information of a plurality of sets of track mark series by an output signal from an optical head that is movable in the radial direction, and a track obtained by the first step. The first and fifth objects are achieved by the second step of specifying the track number of a predetermined track mark based on the phase difference information between marks and searching the specified track.

According to a fifth aspect of the present invention, recording is performed by rotatably moving the disc-shaped optical information recording medium according to the third aspect and by freely moving the optical head in the radial direction of the disc-shaped optical information recording medium. A disc-shaped optical information recording medium drive device for obtaining information by focusing reproduction light on a recording / reproducing surface of a disc-shaped optical information recording medium to freely track an information track. Track mark discriminating means for discriminating a plurality of track mark trains as respective track marks according to an output signal, and phase difference information between adjacent track marks is acquired from the mark trains of each track mark series discriminated by the track mark discriminating means. And a phase difference information acquiring unit between adjacent track marks. To achieve the 6 purpose of.

According to a sixth aspect of the invention, there is provided the method of formatting a disc-shaped optical information recording medium according to the second aspect, wherein the second step comprises forming the track mark series when the plurality of track mark series are formed. The first and seventh objects are achieved by changing the phase relationship between the two to form track marks.

According to a seventh aspect of the present invention, there is provided a disc-shaped optical information recording medium having track marks formed at regular intervals on lands along an equal pitch spiral track and capable of recording and reproducing optical information. The track mark is
The track mark formed by the method for formatting a disk-shaped optical information recording medium according to claim 6 achieves the first and eighth objects.

According to an eighth aspect of the invention, there is provided a method for seeking a disc-shaped optical information recording medium according to the seventh aspect, wherein the rotation of the disc-shaped optical information recording medium is controlled and the disc-shaped optical information recording medium is controlled. A first step of obtaining track mark phase difference information of a plurality of sets of track mark series by an output signal from an optical head that is movable in the radial direction, and a track obtained by the first step. The second step of specifying the track number of a predetermined track mark on the basis of the phase difference information between marks and searching for the specified track achieves the first and ninth objects.

According to the ninth aspect of the invention, recording is performed by rotatably moving the disc-shaped optical information recording medium according to the seventh aspect and moving the optical head freely in the radial direction of the disc-shaped optical information recording medium. A disc-shaped optical information recording medium drive device for obtaining information by focusing reproduction light on a recording / reproducing surface of a disc-shaped optical information recording medium to freely track an information track. Discriminating means for discriminating a plurality of track mark sequences by the output signal, detecting means for detecting track mark phase difference information between the plurality of track mark sequences discriminated by the discriminating means, and a plurality of detecting means for detecting the mark mark phase difference information. Phase difference information between adjacent track marks is obtained for each of the track mark sequences of By providing a means, to achieve the first and the tenth purposes.

According to a tenth aspect of the invention, there is provided a method for formatting a disc-shaped optical information recording medium according to the second or sixth aspect, which is formed on an information recording / reproducing track of the disc-shaped optical information recording medium. Physical format is CLV
(Constant Linear Velocity
y) In the case of the disc format, the track mark distance of any one of the plurality of formed track mark sequences is equal to the sector length of the CLV disc format, whereby the first and the first Achieve 11 goals.

According to an eleventh aspect of the present invention, there is provided a disc-shaped optical information recording medium capable of recording and reproducing optical information, which has track marks formed at regular intervals on a land portion along an equal pitch spiral track. The track mark has a track mark formed by the method for formatting a disc-shaped optical information recording medium according to claim 10, and the CLV disk format is mounted as a physical format, whereby the first and twelfth objects are achieved. To achieve.

According to a twelfth aspect of the invention, there is provided a disk-shaped optical information recording medium formatting method according to the sixth aspect.
When the physical format formed on the information recording / reproducing track of the disc-shaped optical information recording medium is the MCAV disc format, the arrangement information between the plurality of formed track mark sequences is changed to MCAV (Modified Coding).
The first and thirteenth objects are achieved by changing the zone according to the zone of the Instant Angular Velocity) disc format.

According to a thirteenth aspect of the present invention, there is provided a disc-shaped optical information recording medium which has track marks formed at regular intervals on lands along an equal pitch spiral track and is capable of recording and reproducing optical information. The track mark has a track mark formed by the method for formatting a track mark of a disc-shaped optical information recording medium according to claim 12, and the MCAV disk format is mounted as a physical format, whereby the first and the second tracks are formed. Achieve 14 goals.

[0035]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will now be described in detail with reference to FIGS.
FIG. 1 is a diagram showing track marks of the disc-shaped optical information recording medium according to the present embodiment. Track marks are formed at regular intervals on the information tracks for recording / reproducing information and the land portions between the information tracks. When the information track is tracked by the optical pickup, the signals of the track marks formed on the lands on both sides of the information track can be obtained from the push-pull signal. Figure 2
FIG. 7 is a diagram showing an example of track mark signals on adjacent tracks. The inner circumference side of the track being tracked,
Since the polarities of the track mark signals on the outer peripheral side are different, it is possible to specify which is the track mark corresponding to the current track or the track mark of the adjacent track (FIG. 2).
(See (a)). As the disc rotates, the track mark signals are distributed between the track marks of the current track according to the graph of the distance between adjacent tracks shown in FIG. 3, as shown in FIGS. 2B and 2C. The position of the track mark (hereinafter, this positional relationship is referred to as a phase difference) changes.

Here, the change in the distance between adjacent track marks will be described with reference to FIG. In an equal pitch spiral track formed by CLV drive,
The total track line length (L) is expressed by the following equation (1). L = π * (r ² −R ₀ ² ) / P (1) r = R ₀ + n * P (n = 1,2,3 ...) (2) R ₀ is the start radius of the spiral The position is r, the spiral radius position where the line length is to be measured, P is the spiral track pitch, and n is the number of tracks.
It is possible to obtain from Equation (1) and Equation (2). L = 2 * π * R ₀ * n + n 2 * π * P (n = 1,2,3 ...) (3) Further, the line length (Ln) of each track can be calculated by the following equation (3). It is expressed as in equation 4). Ln = 2 * π * R ₀ + (2 * n−1) * π * P (n = 1,2,3 ...) (4) From equation (4), the line length between adjacent tracks is calculated. It can be seen that the difference is constant as follows. (Line length difference between adjacent tracks) = 2 * π * P = constant (5)

Here, an increased line length (su) m tracks ahead with reference to a sector start position on a track.
When mdLm) is obtained, it becomes as shown in Expression (6). sum
dLm = 2 * π * P (1 + 2 + 3 + ... + m) = π * P * m * (m + 1) (6) From the equation (6), m is set with reference to a sector start position on a track. Increased track length at track destination (sumdL
When the track length difference between the adjacent tracks in (m) is obtained, the formula (7) is obtained. dLm = sumdLm-sumdLm-1 = 2 * π * P * m (7)

Therefore, when marks are provided at regular intervals along the spiral track, the distance (dLm) between the marks on the adjacent tracks increases with the distance from a certain reference track. . now,
When the distance between marks is an integral multiple (n) of the length (2 * π * P), and when the distance from a certain reference track increases and dLm becomes equal to the distance between marks, the distance between adjacent tracks becomes 0. It becomes equal and the same change in the distance between adjacent track marks is repeated again (see the change in the distance between adjacent track marks in FIG. 3). The distance between track marks is (2 * π *
P) If it is not an integral multiple of the length (n), the distance between adjacent track marks will not be exactly equal to 0 each time,
Almost the same change in the distance between adjacent track marks is shown. The change can be accurately calculated in advance.

The horizontal axis direction of FIG. 3 corresponds to the radial direction of the information area of the disc-shaped information recording medium. Although it depends on the setting of the distance between track marks, it can be seen from FIG. 3 that the track number of the current track can be specified from the rough radial position and the phase difference information between adjacent track marks. By increasing the distance between track marks, one zone width in FIG. 3 can be widened. Here, a long distance between track marks means that it takes a long time to obtain the phase difference information between adjacent track marks.
The shorter the distance between track marks, the shorter the phase difference information between adjacent track marks can be obtained.

Next, how to obtain the phase difference information will be described. FIG. 4 is a diagram showing a method for acquiring phase difference information between adjacent track marks. The time interval of Ta, Tb or Ta, Tc in FIGS. 4 (a) and 4 (b) is measured, and Ta / (Ta + Tb) ... (8) or Ta / Tc. ), The phase difference information between adjacent track marks can be obtained by the calculation of Expression (9). This value does not depend on the rotation speed of the disc-shaped information recording medium. An accurate value can be obtained at a rotation speed other than the specified rotation speed or even during an excessive change. By correlating this phase difference information with the graph of the distance between adjacent track marks in FIG. 3, the track number of the current track can be specified. In the embodiment described below, it is assumed that a plurality of track mark sequences are formed. These are formed in a form that can be identified in advance for each series. For example, a method of forming a long-period track mark by continuously forming two marks and a short-period track mark by continuously forming three marks can be cited. Further, a track mark sequence having a relatively long period will be described as a track mark sequence (A), and a track mark sequence having a relatively short period will be described as a track mark sequence (B).

FIG. 5 is a diagram showing an example of the distance between adjacent track marks based on a plurality of track mark series. Figure 5
Then, as an example of how the distance between adjacent track marks changes due to a plurality of track mark series having different track mark distances, the case where there are two series of track marks is shown. In the figure, the broken line shows changes in the distance between adjacent track marks in the long cycle track mark, and the solid line shows changes in the distance between adjacent track marks in the short cycle track mark. The horizontal axis is the number corresponding to the track number. Both of the gradients of change are equal to 2πP per track (P is the pitch of a uniform pitch spiral). In the area (a) in the figure, the phase difference information between adjacent track marks obtained from the track mark series (A) having a relatively long cycle and the phase difference between adjacent track marks obtained from the track mark series (B) having a short cycle. From the information, the track number of the current track can be specified. In this example, there are two track mark series, but there may be more track mark series. In that case, it is possible to provide the effect of increasing the reliability with respect to the loss of track marks due to defects and the like when it becomes an information medium.
In addition, a redundant operation can be realized even when performing a seek operation.

FIG. 6 is a diagram showing an example of the distance between adjacent track marks according to a plurality of track mark series. Figure 7
FIG. 6 is a diagram showing an example of changes in phase difference between adjacent track marks. FIG. 8 is a diagram showing an example of the track mark arrangement when the long period is twice the short period. Here, a case where two series of track marks, that is, a long-period track mark and a short-period track mark are formed will be described with reference to FIGS. 6, 7, and 8. Since the relationship between the track mark distance of the track mark series (A) having a relatively long cycle and the track mark distance of the track mark series (B) having a relatively short cycle is a multiple relationship, the distance between adjacent track marks of two series is The graph of the change in distance is a graph with some overlap. If this is considered as phase difference information (when the distance between adjacent track marks is 0; phase 0, when the distance between track marks is phase; phase 1), it becomes like the graph shown in FIG. It can be seen that the difference information is different. Track mark series (A),
Looking at the relationship between the distance between track marks and the track number (horizontal axis of the graph in FIG. 6) in (B), when the areas (A) and (A) in the figure are viewed, the track mark series (A) in each area , (B), the track number can be specified from the phase difference information between adjacent track marks. By setting the track mark length of the long period to be long, one area (a) can correspond to the information area of the recording information medium.

Further, FIG. 8 shows an example of the track marks formed on the land, but the relationship of the track mark arrangement between the series is constant in all areas (α is constant in all areas), Good marks can be formed without causing problems such as overlapping marks. In the areas (a) and (b), there are two track numbers estimated from the phase difference information between adjacent track marks of the track mark series (A) and (B), and the track number cannot be specified. It will be. Note that the specification of the two existing track numbers will be described in a sixth embodiment described later.

In the optical information recording medium, by forming the plural track mark series of FIGS. 5 to 8 in the land portion between the information tracks formed in the uniform pitch spiral shape, the phase difference information between the adjacent tracks is obtained. It is possible to provide a disc-shaped optical information recording medium capable of specifying a track number. Here, the physical format formed in the information track may be any form. In addition, it is assumed that there is no problem even if the information track meandering or the like seen in the optical information recording medium occurs.

FIG. 9 is a flow chart showing the procedure of the track seek processing of the disc-shaped optical information recording medium. Figure 9
Shows a seek flow when accessing a track with a certain track number (Nt). A long cycle track mark series (A) and a short cycle track mark series (B) are formed as the track marks, the long cycle track marks are set to an appropriate length, and the phase difference information between adjacent track marks is combined. It is assumed that only one track number corresponds to. An optical disc medium will be described as an example of the disc-shaped optical information recording medium.

The operation of rotating the optical disk medium to a predetermined number of rotations is started (step 91). When the physical format mounted on the optical disc medium is the CAV or MCAV format, the control operation is started to a predetermined rotation speed. Further, in the case of the CLV format, the control operation is started to the rotation speed corresponding to the radial position of the target track number. In the seek operation thereafter, the rotation speed of the optical disk medium may be in an excessively controlled state to the target rotation speed. When the optical disc medium starts rotating, the optical pickup is focused on the information recording / reproducing surface and is tracked to the information track, and the track mark series A and B are used to detect the phase difference information (T ') between the adjacent track marks to the track of the current track. Specify the number (Nr). Then, from the target track information (Nt) and the current track information (Nr), the moving direction and the distance (the number of crossing tracks) of the pickup for approaching the target track are obtained, and the pickup is moved to an approximate target track position. (Step 92).

When the pickup reaches the assumed target track position, the track number of the current track is specified again using the phase difference information between adjacent track marks (step 93). At this time, when the moving distance is not so different from the radial cycle length of the phase difference change between the adjacent track marks of the short cycle track mark, the previously specified track number and the phase difference information between the adjacent track marks of the B series are used. Since the track number of the current track can be specified from the phase difference information between adjacent track marks of the B series in the current track, the phase difference information between adjacent track marks of the A series is not acquired. Since the distance between track marks is long to obtain the phase difference information between adjacent track marks of a long cycle track mark, it takes a long time to measure the length. Omits this to reduce the overall seek time.

It is determined whether or not the current track information (Nr) reached by the movement of the pickup is the target track (Nt) (step 94). If it is not the target track (step 94; N), the moving direction is determined and the movement is started (step 95). Then, the distance between adjacent track marks is measured using the series B, the track number of the current track is specified using the phase difference information between adjacent track marks (step 96), and the process returns to step 94. If it is the target track (step 94; Y), the optical disk media is kept waiting for the predetermined number of rotations while maintaining the pickup on the target track (step 9).
7). At the stage when the rotation speed reaches a predetermined value (step 97;
Y), the seek operation is completed. After that, operations such as writing or reading of information to the information track are performed.

FIG. 10 is a diagram showing the configuration of a disc-shaped optical information recording medium drive device. FIG. 11 is a diagram showing how the track mark information is processed. The disk-shaped optical information recording medium drive device is rotated at a predetermined rotation speed by the rotation motor 2 that rotates the optical disk medium 1 that forms a plurality of track marks as described with reference to FIGS. The rotary motor 2 is controlled by the controller, but its connection is omitted in this figure. The optical pickup 3 is movable in the radial direction of the disc, performs focusing and tracking operations on information tracks on the disc, and records and reproduces information. The signal processing circuit 4 for the optical pickup signal outputs a PP (push-pull) signal, an Rf signal, and the like. Comparator 5, 6
Acquires a track mark pulse on the current track (+ side pulse in the figure) and a track mark pulse of an adjacent track (-side pulse in the figure) from the PP signal.
The output signals b and c of the respective comparators 5 and 6 are
A long period track mark pulse and a short period track mark pulse are detected in a mixed manner.

The discrimination circuit 7 discriminates the long-period track mark pulse and the short-period track mark pulse from the mixed pulse train into the long-period track mark pulse train and the short-period track mark pulse train. At this stage, each track mark pulse is formed so that the long cycle track mark pulse and the short cycle track mark pulse can be discriminated. Specifically, there is a method in which a long-period track mark is formed of two consecutive marks and a short-period track mark is formed of three consecutive marks. After discrimination,
The phase difference information acquisition circuits 8 and 9 acquire the phase difference information between adjacent track marks of each series. The controller 10 uses the phase difference information between the adjacent track marks to specify the track number and control the seek operation.

In this embodiment, FIGS. 12A and 12B are used.
As shown in FIG. 5, when forming the long-period track mark, the arrangement information (phase information) is set between the long-period track mark and the short-period track mark. In FIG. 12A, an example is shown in which information is added according to which position (here, as an example, three points P1, P2, and P3) between the long-period track marks are arranged. There is. Further, FIG. 12B shows an example in which information is further added in combination with the arrangement information of a plurality of long cycle track marks. FIG. 13 is a diagram showing a graph of the distance between adjacent track marks in the case where a series of track marks are formed in a long period and a short period. This graph is equivalent to the graph of FIG. In each of the areas (a), (b), and (c) in FIG. 13 (hereinafter, referred to as a track mark zone), the track mark arrangement relationship between the long-period track mark and the short-period track mark, FIG. It is rationally resolved by assigning the information of the track mark zones (a), (b), and (c) of b). That is, the track number of all the tracks in the track mark zones (a), (b), and (c) can be specified by the phase difference information between adjacent track marks of the track mark series and the mark arrangement information between the track mark series. Become.

If the mark arrangement information between the track mark sequences is subdivided, the track number can be specified even if the distance between the long period track marks is shortened. Also,
The same applies when the number of combinations of the arrangement information of a plurality of long-period track marks is increased. The short distance between the marks of the long period track marks means that the time for acquiring the phase difference information between the adjacent track marks can be short,
This is effective in shortening the time for the entire seek operation. When acquiring mark position arrangement information between track mark series,
Information that does not depend on the number of rotations of the optical disk medium by obtaining the phase information between the short-period track marks and the position where the long-period track marks are arranged, that is, by obtaining the phase information as in the case of obtaining the phase information between adjacent track marks. Allows acquisition.

In the optical disk medium, by forming a plurality of track mark series having a relatively short track mark distance of the sixth embodiment in the land portion between the information tracks formed in a uniform pitch spiral shape. The track number in the optical disk medium can be uniquely specified from the phase difference information between adjacent tracks and the track mark arrangement information between track mark sequences. Furthermore, it is possible to provide an optical disc medium that can be specified at high speed. Here, the physical format formed in the information track may be any form. In addition, it is assumed that there is no problem even if the information track meandering or the like seen in the optical information recording medium occurs.

FIG. 14 is a flow chart showing a track seek processing procedure for the disc-shaped optical information recording medium. Although the processing procedure of the seek method shown in FIG. 9 is almost the same,
The difference is that step 143 and step 146
In addition, an operation of specifying zone information of a track mark from the track mark arrangement information between track mark sequences is added. Step 143 and Step 14
Acquisition of track mark zone information in 6 is not always necessary depending on the movement distance of the pickup, but the time required to acquire information is short and the track number can be easily specified. So, here is the procedure to get it. Since the seek operation of the other steps 141, 142, 144, 145, 147 is the same as the track seek processing procedure described with reference to FIG.

FIG. 15 is a diagram showing the configuration of a disc-shaped optical information recording medium drive device. Note that FIG. 15 corresponds to FIG.
The calibration is almost the same as that of the disc-shaped optical information recording medium drive device, but between track mark series (corresponding to signals d and f).
The difference is that the track mark arrangement information acquisition circuit 11 is added. The track mark zone number can be specified by the information obtained from this track mark arrangement information acquisition circuit, and together with the phase difference information between adjacent track marks,
A seek operation to a target track can be realized.

FIG. 16 is a diagram showing a method of formatting a track mark. FIG. 16 shows an example in which the sector length in the physical format formed in the information track is the same as the short-period track mark distance. When a physical format is formed in the information track by the CLV disk format, the sector length on the information track is set to be a constant length in the entire recording area of the disk-shaped storage medium, so the length between track marks is made the same as the sector length. In this case, the track mark and the sector can be made to correspond in the entire area. As a result, it is possible to realize the track search of the CVL disk format that is consistent with the search operation using the track mark information. It is also possible to provide an optical disc medium having such a function.

In the MCAV disc format, the information area is divided into several areas by the radius method, and the storage capacity is increased by increasing the number of sectors per track circumference toward the outer circumference (see FIG. 19). . In the present embodiment, the track mark arrangement between track mark sequences is changed for each zone of the MCAV format. This makes it possible to match the acquisition of track mark arrangement information between track mark sequences with the acquisition of zone information in the MCAV format. Moreover, an optical disk medium having such a function can be provided. Here, a seek method for an MCAV format disc will be described. To perform a seek operation to a target sector in an MCAV format disc, an optical disc medium in which the track mark arrangement between track mark sequences is changed for each zone of the MCAV format is used, and the seek method shown in FIG. 14 is used. Can be easily achieved.

FIG. 17 is a flow chart showing the seek processing procedure of the MCAV format disc. Note that the seek method of FIG. 17 is the same as the processing procedure of the seek method of FIG. 14, so description thereof will be omitted. Since the track mark zone information and the MCAV format disc zone information (MCAV zone information) correspond to each other,
In each step 171-177 of FIG. 17, the target track can be reached by replacing the track mark zone information in the seek method of FIG. 14 with MCAV zone information and performing a seek operation. Also, MCA
The V format disk drive device is basically shown in FIG.
5 can be achieved.

As described above, in the track mark formatting method of the present embodiment, the information recording area has a plurality of track mark series, and the tracks in the information recording area are determined from the phase difference information between adjacent track marks. Since it can only be specified, a high-speed seek operation without using address information can be realized. Further, in the track mark formatting method of the present embodiment, the track mark lengths between a plurality of formed track mark sequences are in a multiple relationship, so that the track marks can be prevented from overlapping. Further, in the optical disc medium of the present embodiment, since track marks conforming to the track mark format are mounted, it is possible to realize a high-speed seek operation. Furthermore, in the track mark seek method of the present embodiment, the track in the information recording area can be specified from the phase difference information between adjacent track marks that can be acquired from a plurality of track mark series mounted on the optical disc medium, so that the high speed It is possible to configure various seek operations. In the optical media disk drive device of the present embodiment, the track mark discrimination circuit and the phase difference information acquisition circuit between adjacent track marks for each track mark series are prepared, so that a high-speed seek operation can be realized.

In the track mark formatting method of the present embodiment, the track mark zone can be specified by the track mark arrangement information between a plurality of track mark sequences, so that a plurality of track mark sequences are relatively short. It is possible to configure a track mark sequence of a cycle, and it is possible to realize a fast and easy seek operation. In the optical disc medium according to the present embodiment, since the track mark conforming to the track mark format is formed, high speed seek operation can be realized. In the seek method according to the present embodiment, the track mark arrangement information between track mark sequences that can be acquired from a plurality of track mark sequences each having a relatively short track mark length, and the phase difference information between adjacent track marks are used in the information recording area. Since it is possible to specify the track, it is possible to configure a high-speed seek operation. Since the optical media disk drive device of the present embodiment has the track mark arrangement information acquisition circuit between track mark series,
A high-speed seek operation can be realized according to the seek method.

In the track mark formatting method of this embodiment, the sector length of the CLV disk format mounted on the information track is equal to the track mark length of any one of the mounted track mark series. , Seek operation with good consistency to the target track on the CLV disk format,
A method of formatting a track mark can be provided. In the optical disc medium according to the present embodiment, since the track mark conforming to the track mark format is formed, it is possible to provide the optical disc medium equipped with the CLV disc format capable of realizing the seek operation with good consistency. In the track mark formatting method of the present embodiment, the track mark arrangement between the track mark sequences is changed corresponding to the zones of the MCAV format. Therefore, a method of formatting the track marks that facilitates acquisition of MCAV zone information is provided. be able to. In the optical disc medium according to the present embodiment, since track marks conforming to the track mark format are formed, an optical disc medium equipped with the MCAV disc format capable of easily obtaining MCAV zone information and realizing high-speed seek operation is used. Can be provided.

[0062]

According to the first aspect of the present invention, the first step of forming a plurality of track marks at a constant interval on the land portion and the plurality of track marks formed at a constant interval by the first step are formed. A second step of simultaneously forming a plurality of sets of track mark series having a predetermined interval and a track mark series of a predetermined interval of the track mark series and an interval between different track marks. It has multiple track mark series in the recording area, and it is possible to uniquely identify the track in the information recording area from the phase difference information between adjacent track marks, and realize a high-speed seek operation without using address information. You can

In a second aspect of the present invention, the second step is that a predetermined track mark series which is the shortest track mark interval among a plurality of sets of track mark series and a track mark for the shortest track mark interval. Since a plurality of sets of track mark series whose intervals are integral multiples are formed,
It is possible to prevent the track marks from overlapping with each other.

In the invention described in claim 3, since the track mark is the track mark formed by the method for formatting the disk-shaped optical information recording medium according to claim 1 or 2, it is possible to realize a high-speed seek operation. It is possible to provide a disc-shaped optical information recording device.

According to the fourth aspect of the present invention, the rotation of the disc-shaped optical information recording medium is controlled, and a plurality of sets are set by the output signal from the optical head that is provided so as to be movable in the radial direction of the disc-shaped optical information recording medium. The first step of acquiring the phase difference information between the track marks of the track mark sequence of the above, and the track number of the predetermined track mark is specified and specified based on the phase difference information between the track marks acquired by the first step. The second step of searching for a track is a seek method for a disc-shaped optical information recording medium, and
A high-speed seek operation can be realized.

According to a fifth aspect of the present invention, there are provided a track mark discriminating means for discriminating a plurality of track mark rows as respective track marks by an output signal from the optical head, and a track mark series discriminated by the track mark discriminating means. Since the adjacent track mark phase difference information acquisition means for acquiring the adjacent track mark phase difference information from the mark row is provided, a high-speed seek operation can be realized.

In the sixth aspect of the present invention, in the second step, when a plurality of track mark series are formed, the phase relationship between the track mark series is changed to form the track marks, so that the track mark zone is specified. It is possible to configure a plurality of existing track mark sequences with a track mark sequence of a relatively short period, and it is possible to realize a fast and easy seek operation.

In the invention described in claim 7, since the track mark is a disk-shaped optical information recording medium having the track mark formed in the method for formatting a disk-shaped optical information recording medium according to claim 6, a high-speed seek is performed. The operation can be realized.

According to the invention described in claim 8, a plurality of sets are controlled by an output signal from an optical head which controls the rotation of the disc-shaped optical information recording medium and is movable in the radial direction of the disc-shaped optical information recording medium. The first step of acquiring the phase difference information between the track marks of the track mark sequence of the above, and the track number of the predetermined track mark is specified and specified based on the phase difference information between the track marks acquired by the first step. Since the second step of searching for a track is included, a high-speed seek operation can be realized.

According to the ninth aspect of the present invention, the discriminating means for discriminating the plurality of track mark series by the output signal from the optical head and the track mark phase difference information between the plural track mark series discriminated by the discriminating means are provided. Since the detecting means for detecting and the adjacent track mark phase difference information acquiring means for acquiring the adjacent track mark phase difference information for each of the plurality of track mark sequences detected by the detecting means are provided, a high-speed seek operation is possible. Can be realized.

In a tenth aspect of the invention, when the physical format formed on the information recording / reproducing track of the disc-shaped optical information recording medium is the CLV disc format,
Any one of a plurality of track mark sequences formed
The distance between track marks of one track mark series is CL
Since it is equal to the sector length of the V disk format, CL
It is possible to provide a method of formatting a track mark capable of seek operation with good consistency with respect to a target track on the V disk format.

According to the invention of claim 11, the track mark has a track mark formed in the method for formatting a disc-shaped optical information recording medium according to claim 10,
Since the disc-shaped optical information recording medium is equipped with the CLV disc format as the physical format, it is possible to realize a seek operation with good consistency.

According to the twelfth aspect of the invention, when the physical format formed on the information recording / reproducing track of the disc-shaped optical information recording medium is the MCAV disc format, the arrangement information between a plurality of track mark sequences formed is MCAV. Since it is changed corresponding to the zone of the disc format, it is possible to provide the method of formatting the track mark in which the MCAV zone information can be easily obtained.

According to the thirteenth aspect of the present invention, the track mark has the track mark formed by the method of formatting the track mark of the disk-shaped optical information recording medium according to the twelfth aspect, and the MCAV disk format is mounted as a physical format. Since this is a disc-shaped optical information recording medium, it is possible to easily obtain MCAV zone information and realize a high-speed seek operation.

[Brief description of drawings]

FIG. 1 is a diagram showing track marks of an optical disc medium according to the present embodiment.

FIG. 2 is a diagram showing an example of a track mark signal on an adjacent track.

FIG. 3 is a diagram showing a change in distance between adjacent track marks.

FIG. 4 is a diagram showing a method of acquiring phase difference information between adjacent track marks.

FIG. 5 is a diagram showing an example of a distance between adjacent track marks based on a plurality of track mark series.

FIG. 6 is a diagram showing an example of a distance between adjacent track marks based on a plurality of track mark series.

FIG. 7 is a diagram showing an example of changes in phase difference between adjacent track marks.

FIG. 8 is a diagram showing an example of track mark arrangement in the case where the long cycle is twice the short cycle.

FIG. 9 is a flowchart showing a track seek processing procedure of a disc-shaped optical information recording medium.

FIG. 10 is a diagram showing a configuration of a disc-shaped optical information recording medium drive device.

FIG. 11 is a diagram showing how track mark information is processed.

FIG. 12 is a diagram showing a phase relationship between a long period track mark and a short period track mark.

FIG. 13 is a diagram showing a graph of a distance between adjacent track marks in the case where a series of track marks are formed in a long period and a short period.

FIG. 14 is a flowchart showing a processing procedure for track seek of a disc-shaped optical information recording medium.

FIG. 15 is a diagram showing a configuration of a disc-shaped optical information recording medium drive device.

FIG. 16 is a diagram showing a method of formatting a track mark.

FIG. 17 is a flowchart showing a seek processing procedure for an MCAV format disc.

FIG. 18 is a diagram showing CAV, MACV, and CLV disk formats.

FIG. 19 is a diagram showing an example of zones of the MCAV disc format.

[Explanation of symbols]

1 Optical disc media 2 rotation motor 3 optical pickup 4 Signal processing circuit 5, 6 comparator 7 Discrimination circuit 8, 9 Phase difference information acquisition circuit 10 controller

Claims (13)

[Claims] 1. A method of formatting a disc-shaped optical information recording medium, which has track marks formed at regular intervals on lands along an equal pitch spiral track and is capable of recording / reproducing optical information, comprising: A first step of forming a plurality of track marks at a constant interval on the track, and a plurality of track marks formed at a constant interval by the first step as a set of track mark series at a predetermined interval. A method for formatting a disc-shaped optical information recording medium, comprising a second step of simultaneously forming a plurality of sets of track mark series having a series of track marks at predetermined intervals and different track mark intervals. 2. The second step comprises: a predetermined track mark series that is the shortest track mark interval among a plurality of sets of track mark series; and a track mark interval that is an integral multiple of the shortest track mark interval. 2. The method for formatting a disc-shaped optical information recording medium according to claim 1, wherein a plurality of sets of track mark sequences are formed. 3. A disc-shaped optical information recording medium capable of recording and reproducing optical information, comprising track marks formed at regular intervals on lands along an equal pitch spiral track, wherein the track marks are A disc-shaped optical information recording medium, which is a track mark formed by the method for formatting a disc-shaped optical information recording medium according to claim 1 or 2. 4. The method for seeking a disk-shaped optical information recording medium according to claim 3, wherein the rotation of the disk-shaped optical information recording medium is controlled so that the disk-shaped optical information recording medium is movable in the radial direction. A first phase for obtaining phase difference information between track marks of a plurality of sets of track mark series by an output signal from an optical head provided
And a second step in which the track number of a predetermined track mark is specified based on the phase difference information between track marks acquired in the first step and the specified track is searched. And a seek method for a disc-shaped optical information recording medium. 5. The disc-shaped optical information recording medium according to claim 3 is rotatably moved, and the optical head is freely moved in the radial direction of the disc-shaped optical information recording medium, whereby the disc-shaped optical information recording medium is changed. A disc-shaped optical information recording medium drive device for obtaining information by focusing on a recording / reproducing surface of an information recording medium and freely tracking to information tracks, wherein a plurality of tracks are output by an output signal from the optical head. Track mark discriminating means for discriminating mark rows as respective track marks, and adjacent track mark distances for obtaining respective phase difference information between adjacent track marks from the mark row of each track mark series discriminated by the track mark discriminating means. A disc-shaped optical information recording medium drive device, comprising: 6. The method of formatting a disc-shaped optical information recording medium according to claim 2, wherein the second step changes a phase relationship between the track mark sequences when forming the plurality of track mark sequences. A method of formatting a disc-shaped optical information recording medium, characterized in that the track marks are formed by forming the track marks. 7. A disc-shaped optical information recording medium capable of recording and reproducing optical information, comprising track marks formed at regular intervals on lands along an equal pitch spiral track, wherein the track marks are Item 7. A disc-shaped optical information recording medium, which is a track mark formed in the method for formatting a disc-shaped optical information recording medium according to Item 6. 8. The method for seeking a disk-shaped optical information recording medium according to claim 7, wherein the rotation of the disk-shaped optical information recording medium is controlled so that the disk-shaped optical information recording medium is movable in the radial direction. A first phase for obtaining phase difference information between track marks of a plurality of sets of track mark series by an output signal from an optical head provided
And a second step in which the track number of a predetermined track mark is specified based on the phase difference information between track marks acquired in the first step and the specified track is searched. And a seek method for a disc-shaped optical information recording medium. 9. A disk-shaped optical information recording medium according to claim 7, wherein the disk-shaped optical information recording medium is rotatably moved, and an optical head is freely moved in a radial direction of the disk-shaped optical information recording medium. A disc-shaped optical information recording medium drive device for obtaining information by focusing on a recording / reproducing surface of an information recording medium and freely tracking to an information track, wherein a plurality of tracks are output by an output signal from the optical head. Identifying means for identifying the mark series, detecting means for detecting track mark phase difference information between each of the plurality of track mark series identified by the identifying means, and each of the plurality of track mark series detected by the detecting means With respect to the phase difference information between adjacent track marks, the phase difference information acquisition means between adjacent track marks is provided. A disk-shaped optical information recording medium drive device. 10. The method for formatting a disc-shaped optical information recording medium according to claim 2, wherein the physical format formed on the information recording / reproducing track of the disc-shaped optical information recording medium is CLV (Constan).
t Linear Velocity) disc format, the distance between track marks of any one of the plurality of formed track mark sequences is equal to the sector length of the CLV disc format. Information recording medium formatting method. 11. A disc-shaped optical information recording medium capable of recording and reproducing optical information, comprising track marks formed at regular intervals on lands along an equal pitch spiral track, wherein the track marks are Item 11. A disc-shaped optical information recording medium having a track mark formed by the disc-shaped optical information recording medium formatting method according to claim 10, and having a CLV disc format as a physical format. 12. The method for formatting a disc-shaped optical information recording medium according to claim 6, wherein the physical format formed on the information recording / reproducing track of the disc-shaped optical information recording medium is the MCAV disc format. The arrangement information between the plurality of track mark sequences formed is used as MCAV (Modified Coding).
nstant Angular Velocity) A method for formatting a disc-shaped information recording medium, which is changed in correspondence with a zone of a disc format. 13. A disc-shaped optical information recording medium capable of recording and reproducing optical information, having track marks formed at regular intervals on lands along an equal pitch spiral track, wherein the track marks are Item 13. A disc-shaped optical information recording medium having a track mark formed by the method for formatting a track mark of a disc-shaped optical information recording medium according to claim 12, and having an MCAV disc format as a physical format.