JPH09120585A - Information recording medium, recording control information reproducing method and information recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk format in which the wobbling information in an adjacent track does not cause any adverse effect and a format compatibility with a ROM disk is maintained and to provide the recording control information reproducing method while conducting a recording using the format above and to provide the associated recording and reproducing device, in an optical disk having wobbling grooves whose track pitch is narrowed to about 70% of the laser spot diameter. SOLUTION: A groove 5 which is wobbled with a constant frequency and a groove 6 which is not wobbled are arranged in every other round. As a result, a laser spot 1 only reproduces rotation synchronization signals and sector address information. Therefore, no cross talk effect is received from the adjacent groove 5. Moreover, a recording is only performed on a land 3 and as a result, a recorded disk has a single spiral and the format compatibility with a ROM disk is accomplished.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording medium, in particular, an information recording medium having a groove wobbling on a blank medium, an information recording / reproducing apparatus for recording / reproducing on this medium, or recording for recording / reproducing. The present invention relates to a control information reproducing method.

In this specification, an information recording medium is referred to as an optical disk for the sake of convenience, but the basic idea of the present invention is to provide a wobbling groove or a wobbling strip having physical characteristics different from those of a recording track. In the area,
It is applicable to an information recording medium to which recording control information is added or an information recording / reproducing device for performing recording / reproducing on the information recording medium, and is not particularly limited to an optical disc or an optical disc recording / reproducing device.

[0003]

2. Description of the Related Art Conventionally, CLV (Constan
As a method of performing t Linear Velocity) recording, a wobbling method has been proposed and used in MD systems and CD-R systems. This wobbling method is a wobbling (vibration in a direction perpendicular to the groove) at a certain frequency in a tracking groove provided on a blank disc.
However, by synchronizing the disk rotation with this wobbling frequency, the motor is controlled so that the optical head rotates at a constant linear velocity.

Further, a sector address is FM-modulated and superimposed on the wobbling frequency in the wobbling groove, and it is designed so that recording control information which is rotation synchronization information and sector address information can be obtained. Also,
This wobbling groove is designed so as not to affect the reproduction signal when reproduced by a reproduction device dedicated to the ROM.
The rotation synchronization can be achieved by the rotation synchronization method used when reproducing the OM disc (for example, the method of detecting the rotation synchronization signal from the recording mark). (Refer to Reference 1: JAS Journal, 1993, January issue, pp26-28.) Also, a one-sided wobbling method has been proposed as a method developed from the above wobbling method. This method is
In this method, wobbling is performed on only one side of the tracking groove so that information can be written in both the land (between grooves) and the groove (inside the groove). (End of Reference 2: International Symposium on Optical Memory,
(See 1995 Technical Digest, pp167-168)

[0005]

The wobbling method of Reference 1 is a very excellent method, but when the track pitch is narrowed to about 70% of the diameter of the laser spot 1 in order to increase the density of recorded information. , Causes some problems.

One of them is, as shown in FIG. 2, when reproducing a wobbling signal by a laser spot 1, a wobbling signal of a different phase and sector address information of an adjacent track crosstalk from an adjacent wobbling groove 2. The problem is that it will be reproduced as.

Further, in the reference document 2, as shown in FIG. 3, crosstalk between the wobbling signal and the sector address signal from the adjacent track is reduced, but since the information is recorded in both the land 3 and the groove 4, As a result, it becomes a double spiral format, and format compatibility with a ROM disk of a single spiral format such as MD and CD-R is difficult.

Therefore, an object of the present invention is not affected by the wobbling information of the adjacent tracks even in an optical disc having a wobbling groove and having a narrow track pitch of about 70% of the laser spot diameter, and is a ROM disc. The present invention is to provide an optical disc format that is compatible with the above format, a recording control information reproducing method for recording the same, and a recording and reproducing apparatus.

[0009]

Means for Solving the Problems The above objects are as follows: (1) There are two strip-shaped areas arranged along both sides of the information recording track in the track direction, and the distance between the strip-shaped areas is the information recording track. An information recording medium having a band-shaped area smaller than the information reading width on the information recording surface of
At least one of the two band-like regions is a first wobbling region that is subjected to a wobbling process at a constant frequency, and the other is a wobbling process at a frequency different from the above frequency, or a wobbling process. An information recording medium, characterized in that it is a second area that has not been processed.

(2) The information recording medium as described in (1), characterized in that a non-wobbling area not subjected to the wobbling process is further provided in a part of the first wobbling area.

(3) In the information recording medium described in (1), an asymmetric wobbling region in which the number of amplitude peaks is asymmetric with respect to the centerline of the wobbling amplitude is further provided in a part of the first wobbling region. An information recording medium characterized by the above.

(4) In the information recording medium described in (1), the information recording medium has a disk shape, the belt-like region is a continuous groove, and the groove has a constant frequency every other circumference. A groove having a region subjected to the wobbling process in
An information recording medium characterized by being subjected to a wobbling treatment at a frequency different from the above-mentioned frequencies or being formed alternately with grooves not subjected to the wobbling treatment.

(5) In the information recording medium described in (4), there are integer n sectors (a minimum unit of information block that requires addressing) within one circle, and n sectors within one circle. It is characterized in that it has two or more circumferences, and that the start and end positions of the sectors of two tracks adjacent to the groove subjected to the wobbling process at a constant frequency coincide with each other. And an information recording medium.

(6) In the information recording medium described in (4), the number of vibration cycles (wobbles) of the groove subjected to the wobbling process is an integer +1/2 within one rotation. Medium.

(7) In the information recording medium described in (5) or (6), an integer +1/2 wobbles are arranged in each sector, and an odd number of sectors are arranged in one circle. Characteristic information recording medium.

(8) The information recording medium as described in (5), characterized in that a non-wobbling area for an integer wobble period is provided at the end of the sector.

(9) In the information recording medium described in (5), information having a frequency higher than the constant frequency of the wobbling is recorded in the groove as a wobbling at the head of each sector. Characteristic information recording medium.

(10) In the information recording medium described in (9), information of a frequency higher than the constant frequency of the wobbling is recorded in the groove as a wobbling at a position where the amplitude of the wobbling groove takes the maximum value. An information recording medium characterized by being present.

(11) A recording control information reproducing method for extracting recording control information from a wobbling signal reproduced from the first wobbling area of the information recording medium according to (1), wherein the first wobbling area is used. The recording control information from the reproduced wobbling signal is commonly used for two information recording tracks adjacent to the first wobbling area, and the recording control information is read by the information read from the first wobbling area. Is recorded as different information for each of the two information recording tracks.

(12) A recording control information reproducing method for extracting recording control information from a wobbling signal reproduced from the first wobbling area of the information recording medium according to (2), wherein: The recording control information from the reproduced wobbling signal is commonly used for two information recording tracks adjacent to the first wobbling area, and the recording control information is set according to the signal level of the reproduction signal in the non-wobbling area. Is recorded as different information for each of the two information recording tracks.

(13) A recording control information reproducing method for extracting recording control information from a wobbling signal reproduced from a first wobbling area of the information recording medium according to (3), wherein the first wobbling area is used. The recording control information from the reproduced wobbling signal is commonly used for two information recording tracks adjacent to the first wobbling area, and the maximum and / or minimum value of the reproduction signal in the asymmetrical wobbling area is used. A recording control information reproducing method, wherein the recording control information is processed as different information for the two information recording tracks by detecting a number.

(14) An information recording / reproducing apparatus for recording / reproducing on / from the information recording medium as described in (2), comprising reproducing means for reproducing a wobbling signal from the first wobbling area, and a wobbling from the reproducing means. The signal is commonly used for two information recording tracks adjacent to the first wobbling area, and the signal level of the reproduction signal of the non-wobbling area is used for each of the two information recording tracks from the wobbling signal. An information recording / reproducing apparatus comprising: a control unit that obtains different recording control information.

(15) An information recording / reproducing apparatus for recording / reproducing information on / from the information recording medium according to (3), wherein the reproducing means reproduces a wobbling signal from the first wobbling area and the wobbling from the reproducing means. By using a signal commonly to two information recording tracks adjacent to the first wobbling area, and detecting the maximum value and / or the minimum value of the reproduction signal of the asymmetrical wobbling area, An information recording / reproducing apparatus comprising: control means for obtaining different recording control information for the two information recording tracks from a wobbling signal.

Is achieved by

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the format of the present invention is shown in FIG. The most significant feature is that the user data area of the optical disk 7 coexists with a wobbling area composed of the groove 5 wobbling at a constant frequency and a non-wobbling area composed of the groove 6 not wobbling. In the case of this example, wobbling regions and non-wobbling regions are alternately arranged every other round.

By doing so, the laser spot 1 can always reproduce the rotation synchronizing signal and the sector address information from a single wobbling area, and therefore is not affected by the crosstalk from the adjacent wobbling groove. . Further, since the recording is performed only on the land 3 (between the grooves), the recorded disc becomes a single spiral as a result, and the format compatibility with the ROM disc can be achieved.

In the case of this example, the wobbling areas and the non-wobbling areas are arranged every other round, but, for example, the wobbling areas and the non-wobbling areas are alternately arranged within one round, and among the grooves on both sides of the information recording track. The arrangement may be such that, when a wobbling area is present on one side, a non-wobbling area is present on the other side, and when a non-wobbling area is present on one side, a wobbling area is present on the other side.

Further, by adding information of a frequency different from that of the wobbling region to the non-wobbling region as a wobbling, more information can be obtained from these grooves, which is more excellent depending on the system configuration. There is a case.

In this method, the rotation synchronizing signal and sector address information obtained from the wobbling area used when recording on a certain information recording track are also used when recording on an adjacent track. Therefore, the position of the laser spot with respect to the wobbling groove (inner peripheral side or outer peripheral side) must be determined. That is, it is necessary to clarify whether the reproduced sector address information belongs to the track to be recorded or the adjacent track. Hereinafter, this method will be described in detail.

As an example, when the laser spot 1 passes through the inner and outer tracks of the wobbling groove when the minute non-wobbling area 9 exists in the wobbling area 8 (FIG. 4). The obtained tracking error signal is shown in FIG. When the laser spot passes through the inner circumference side and the outer circumference side of the wobbling groove, the phases of the obtained tracking error signals are inverted. Therefore, for example, the position of the laser spot with respect to the wobbling groove can be specified by comparing the signal levels of the non-wobbling regions 9 existing before and after the wobbling region 8 in the figure.

Further, for example, as shown in FIG. 6, when the wobbling area 8 in which the number of amplitude peaks is asymmetric with respect to the center line of the wobbling amplitude is provided, a tracking error signal as shown in FIG. 7 is obtained. The position of the laser spot with respect to the wobbling groove can be specified by comparing the number of peaks at the positive level and the number of peaks at the negative level, or by determining whether the number of peaks is an odd number or an even number.

Further, it is desirable that the information recording medium of the present invention has a zone. (In the present invention, an appropriate integer n sectors (a minimum unit of information block in the medium that needs addressing) exist in one round, and an area having n sectors in one circle exists more than once. Moreover, when the positions of the head and the end of the sector match between adjacent tracks, the area on this medium is defined as a zone.
However, in the case where the number of zones in the entire area of the information recording medium is 1, that is, in the medium having an integer n sectors within one circumference in the entire area of the information recording medium, this is not called a zone. The reason for this will be explained below.

As described above, in the present invention, the sector address information obtained from the wobbling groove is shared with the adjacent track. Therefore, due to the presence of the zone, the timing of reading the sector address information becomes equal in all the sectors, so that the signal synchronizing circuit for reproducing the sector address can be extremely simplified.

Further, the difference in the number of sectors from the adjacent zone is 1 to
With two sectors, the sector length, the wobbling frequency, and the channel clock hardly change at the time of zone switching. Therefore, even in the CLV rotation control, the influence on the reproduction signal can be made relatively small.

Further, although the present invention is intended for an information recording medium, particularly a disk-shaped medium such as an optical disk, it is desirable that the wobbling signal always continuously changes in such a medium. For example, when a phase shift occurs at a certain position within one round, the continuity of the wobbling signal is lost, so that special consideration must be given to the signal processing.

A case will be described as an example in which wobbling regions and non-wobbling regions alternately exist every other round, as in the above-described example. Assuming that wobbles with an integer period exist within one round, the boundary portion 10 between the wobbling area 8 and the non-wobbling area 9 is as shown in FIG. 8, and the wobbling signal obtained from this portion is discontinuous as shown in FIG. Become a signal. The presence of such a signal not only requires special consideration in signal processing, but also adversely affects recorded user data.

In order to secure the continuity of the wobbling signal, wobbles of an integer +1/2 period may be arranged in one round as shown in FIG. By doing so, the wobbling signal obtained from the boundary portion 10 between the wobbling area 8 and the non-wobbling area 9 becomes a continuous signal as shown in FIG. 11, and no special consideration is required for the signal processing and the recorded user It does not affect the data.

By the method described in detail above, it was shown that the recording control information such as the sector address information and the rotation synchronization information can be obtained without any inconvenience. By these methods, even when the track pitch is narrowed to about 70% of the laser spot diameter, it is possible to perform rough positioning with reference to the sector address information and record the information.

Next, a method of detecting the head portion of each sector, performing accurate positioning, and recording information will be described. For this purpose, a wobble (sync wobble) having a short period corresponding to the length of several channel bits may be arranged as a sync mark at the beginning of each sector. By doing so, it is possible to control the recording start position extremely accurately with reference to the sync wobble.

Since this sync wobble is superimposed and reproduced on a wobble (rotation control wobble) having a relatively long period for rotation control, the quality of the sync wobble signal obtained depends on the relative positional relationship between the sync wobble and the rotation control wobble. Depends on. The case where the best sync wobble signal is obtained is the case where the sync wobble 13 is arranged at a position where the amplitude of the wobble for rotation control becomes maximum as shown in FIG. By doing so, the reproduced wobbling signal has the sync wobble signal 12 appearing at the peak position of the rotation control wobble signal 11 as shown in FIG. 13, so that the amplitude of the sync wobble signal can be maximized.

However, when wobbles with an integer period are arranged in each sector, there is an integer number of sectors in one round and the condition that wobbles with an integer + 1/2 period are arranged in one round. Contradiction occurs. In order to eliminate this contradiction, wobbles of an integer + 1/2 period may be arranged in each sector, and an odd number of sectors may be arranged in one round. In addition, by setting the wobbling at the end of each sector to be the non-wobbling area, it is possible to improve the consistency at the boundary between the wobbling area and the non-wobbling area that exist in one place in one turn.

Normally, a ROM disk such as a CD is of a gapless format because data is continuously written when the master disk is manufactured. However, it goes without saying that the above-described method is used for recording as a write-once optical disk. In addition, the gapless format can be used even when recording as a rewritable optical disc. Therefore, it is possible to obtain a write-once or rewritable optical disc that is format compatible with the ROM disc even when the track is narrowed to about 70% of the laser spot diameter.

The optical disc format of the present invention has a wobbling area and a non-wobbling area,
It is important to control the continuity of the wobbling signal and the phase shift during this period. For this reason, the CAV system rotation control is performed when the master disc of the optical disc substrate of the present invention is cut, and the wobbling frequency recorded for each zone is accurately changed.

Next, as a specific example (specific example 1) of this system, FIGS. 14 and 15 show format examples of the optical disk of the present invention. A center hole 16 for clamping having a diameter of 15 mm is formed at the center of a polycarbonate substrate 15 having a diameter of 120 mm and a thickness of 0.6 mm. Radius 23mm to 57.5
The area up to mm is the user data recording area 17. Further, there are 21 zones from the inner circumference to the outer circumference, the track pitch is 0.74 μm, and 2216 tracks are one zone. Further, wobbling regions for wobbling the tracking groove and non-wobbling regions are alternately arranged every other round. 27 in the innermost zone and 6 in the outermost zone
It has 7 sectors. Furthermore, 3 in one sector
A wobbling of 86.5 cycles and a non-wobbling area for one wobbling cycle are arranged. The wobble length is 13.3 μm, which is almost equal to the length of 100 channel bits. Further, sector address information of 32 bits is recorded in one sector by FM modulation so as to be superposed on the wobbling groove. Further, a minute sync wobble corresponding to 8 channel bits is arranged at a position where the amplitude of the wobble at the head of each sector is maximum. The period of this sync wobble is about 1.1 nm, which is the same size as the laser spot. The groove width is about 0.2 μm, the groove depth is about 60 nm, and the wobbling groove amplitude is 0.02 μm.
And

A ZnS-SiO2 protective film having a thickness of 110 nm, a GeSbTe recording film having a thickness of 30 nm, and a ZnS-Si film were formed on the polycarbonate substrate.
An O2 protective film having a thickness of 20 nm and an Al alloy reflective film having a thickness of 100 nm are laminated by a sputtering process, and a protective film made of an ultraviolet curable resin is spin-coated on the protective film and then cured by ultraviolet rays.
Further, the two optical discs thus produced are laminated so that the UV-curable resin protective film faces each other.

Next, FIG. 16 is a block diagram of an optical disc recording / reproducing apparatus for performing recording / reproducing on the optical disc of the present invention.
It was shown to.

A semiconductor laser having a light wavelength of 680 nm and an output of 30 mW is mounted on the optical head 18, and the laser beam emitted from this semiconductor laser has a lens numerical aperture of 0.
The objective lens 6 is used to narrow down the recording surface of the optical disc 19. By using this optical system, the spot diameter on the recording surface of the optical disk becomes about 1.1 μm.

The laser beam reflected on the recording surface of the optical disc 19 is received by the two-divided photodetector and converted into a voltage corresponding to the amount of received light. The difference between the outputs of the two detectors is the tracking error signal. This signal is transmitted to the servo circuit 21 via the preamplifier circuit 20, and drives the optical head 18 to perform tracking on a predetermined track. Further, this tracking error signal vibrates at a frequency corresponding to the wobbling of the groove, and this is used as a wobbling signal here.

When the disk linear velocity is 6 m / s, the main frequency of the obtained wobbling signal is 226 kHz. Based on this frequency, the motor rotation control circuit 22 controls the number of rotations of the motor 23 so that the disk linear velocity is always 6 m / s.

Further, the wobbling signal is transmitted to the address information decoding circuit 24, and FM is added to the wobbling signal.
The sector address information that is modulated and recorded is FM demodulated to obtain a 32-bit sector address.

Further, the signal level of the portion corresponding to the non-wobbling area provided at the end of each sector is measured, and these pieces of information are transmitted to the system controller 25. Based on these pieces of information, the system controller 25 determines whether the wobbling groove exists on the inner circumference or the outer circumference with respect to the laser spot, and assigns a unique sector address to each sector.

Based on the obtained sector address information, the system controller sends a command to the servo circuit to drive the optical head 18 to access a predetermined sector. Further, after detecting the sync wobble and recognizing the position of the head of each sector, the error correction processing circuit 26 is instructed to perform the error correction processing on the address information together with the user data.

The information subjected to the error correction processing is modulated by the EFM modulation circuit 27 and recorded by the laser output drive circuit 28 from the head of each sector in the same format as the ROM disk. The optical disc recorded as described above can be played back by a ROM-only playback device.

Next, as one specific example (specific example 2) of this system, a polycarbonate substrate having the format shown in FIG. 17 was prepared, and the same experiment as in specific example 1 was conducted. This format is almost the same as the format of Example 1, but the shape of the wobbling groove in the sector is different.
That is, a sync wobble is provided at the beginning of a sector, and a non-wobbling area for one cycle, a wobbling area for three cycles, and a non-wobbling area for one cycle are provided behind the sync wobble. This is to provide a unique wobbling area. By doing so, the wobbling area sandwiched between the non-wowling areas at the leading end has a shape in which the number of amplitude peaks is asymmetric with respect to the center of the amplitude.

On this polycarbonate substrate, a ZnS-SiO2 protective film of 110 nm and a GeSbTe recording film of 30 were formed as in Example 1.
In addition, a ZnS-SiO2 protective film having a thickness of 20 nm and an Al alloy reflective film having a thickness of 100 nm are stacked by a sputtering process, and a protective film made of an ultraviolet curable resin is spin-coated on the laminated film and then ultraviolet cured. Further, the two optical discs thus produced are laminated so that the UV-curable resin protective film faces each other.

An optical disk recording / reproducing apparatus for recording / reproducing information on / from this optical disk was substantially the same as in Example 1, but the method of obtaining a unique sector address for each sector is different. That is, the peak number of the wobbling signal reproduced from the wobbling area sandwiched between the non-wobbling areas provided at the head of each sector is detected, and whether the light spot is located on the inner circumference of the wobbling groove or on the outer circumference side. It uses a method to determine whether it is located at.

As a result, a sector address unique to each sector can be obtained, and user data can be recorded in a predetermined sector based on this information. The optical disc recorded in this manner can be reproduced by a ROM-dedicated reproducing device.

[0058]

As described above in detail, by using the information recording medium, the information recording / reproducing apparatus, and the recorded information reproducing method of the present invention, a wobbling groove is provided and the laser spot diameter is reduced to about 70%. A write-once or rewritable optical disc that is not affected by the wobbling information of adjacent tracks and is format compatible with a ROM disc, and a recording / reproducing device for recording on the optical disc with a track pitch. be able to.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a format example of an information recording medium of the present invention.

FIG. 2 is a conceptual diagram illustrating a problem to be solved by the present invention.

FIG. 3 is a conceptual diagram illustrating a problem to be solved by the present invention.

FIG. 4 is an explanatory diagram showing a format example on an information recording medium for realizing one of the recorded information reproducing methods of the present invention.

FIG. 5 is an explanatory diagram showing an example of signal processing in the information recording / reproducing apparatus for realizing one of the recorded information reproducing methods of the present invention.

FIG. 6 is an explanatory diagram showing a format example on an information recording medium for realizing one of the recorded information reproducing methods of the present invention.

FIG. 7 is an explanatory diagram showing an example of signal processing in the information recording / reproducing apparatus for realizing one method of the recorded information reproducing method of the present invention.

FIG. 8 is a conceptual diagram showing a format example on an information recording medium for explaining a problem to be solved by the present invention.

FIG. 9 is a conceptual diagram showing an example of recording control information reproduction for explaining a problem to be solved by the present invention.

FIG. 10 is an explanatory diagram showing a format example on the information recording medium of the present invention.

FIG. 11 is an explanatory diagram showing an example of a reproduction signal of record information control information reproduced from the format on the information recording medium of the present invention.

FIG. 12 is an explanatory diagram showing a format example on the information recording medium of the present invention.

FIG. 13 is an explanatory diagram showing an example of a reproduction signal of recording information control information reproduced from the format on the information recording medium of the present invention.

FIG. 14 is a shape diagram showing a format of an information recording medium according to an embodiment of the present invention.

FIG. 15 is a conceptual diagram showing a format of an information recording medium in one example of the present invention.

FIG. 16 is a block diagram showing an information recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 17 is a conceptual diagram showing a format of an information recording medium in one example of the present invention.

[Explanation of symbols]

 1: Laser Spot 2: Adjacent Woobling Groove 3: Land 4: Groove 5: Woubling Groove 6: Non-Woobling Groove 7: Optical Disc 8: Woobling Area 9: Non-Woobling Area 10: Boundary between Woubling Area and Non-Woubling Area 11: Rotation Control wobble signal 12: Sync wobble signal 13: Sync wobble 15: Polycarbonate substrate 16: Center hole 17: User data area 18: Optical head 20: Preamplifier circuit 21: Servo circuit 22: Motor rotation control circuit 23: Motor 24: Address information decoding circuit 25: System controller 26: Error correction processing circuit 27: EFM modulator 28: Laser output drive circuit

Front page continued (72) Inventor Takashi Takeuchi, 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa, Ltd. Hitachi, Ltd. multimedia system development headquarters (72) Inventor Yasuto Tanaka, 292 Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa Hitachi, Ltd. Multimedia System Development Headquarters (72) Inventor Seiji Yonezawa 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Hitachi Ltd. Multimedia System Development Headquarters

Claims (15)

[Claims] 1. An information recording track having two strip-shaped regions arranged along both sides of the information recording track in the track direction, and a distance between the strip-shaped regions is larger than an information reading width on an information recording surface of the information recording track. An information recording medium having a small band-shaped area, wherein at least one of the two band-shaped areas is a first wobbling area subjected to a wobbling process at a constant frequency, and the other is different from the above frequency. An information recording medium characterized by being subjected to a wobbling process at a frequency or a second region not subjected to the wobbling process. 2. The information recording medium according to claim 1, wherein
An information recording medium, characterized in that a non-wobbling area not subjected to a wobbling process is further provided in a part of the first wobbling area. 3. The information recording medium according to claim 1, wherein
An information recording medium, characterized in that an asymmetric wobbling area in which the number of amplitude peaks is asymmetric with respect to the centerline of the wobbling amplitude is further provided in a part of the first wobbling area. 4. The information recording medium according to claim 1,
The information recording medium has a disk-like shape, and the band-shaped area is a continuous groove, and the groove has a groove having an area subjected to a wobbling treatment at a constant frequency every other circumference, and the frequency. An information recording medium characterized by being subjected to a wobbling treatment at different frequencies, or alternately formed with grooves not subjected to the wobbling treatment. 5. The information recording medium according to claim 4,
There are integer n sectors (a minimum unit of information block that requires addressing) within one cycle, and there are two or more areas having n sectors within one cycle, and the wobbling process is performed at a constant frequency. An information recording medium, characterized in that there is an area (zone) in which the positions of the head and the end of sectors of two tracks adjacent to the formed groove are coincident with each other. 6. The information recording medium according to claim 4,
Vibration cycle of wobbled groove (wobble)
An information recording medium, characterized in that the number is +1/2 in a circle. 7. The information recording medium according to claim 5, wherein an integer +1/2 wobbles are arranged in each sector,
An information recording medium characterized by arranging an odd number of sectors within one round. 8. The information recording medium according to claim 5,
An information recording medium characterized in that a non-wobbling area for an integer wobble period is provided at the end of a sector. 9. The information recording medium according to claim 5,
An information recording medium characterized in that information of a frequency higher than the constant frequency of the wobbling is recorded in the groove as a wobbling at the head of each sector. 10. The information recording medium according to claim 9, wherein information of a frequency higher than a constant frequency of the wobbling is recorded in the groove as a wobbling at a position where the amplitude of the wobbling groove has a maximum value. An information recording medium characterized by the above. 11. A recording control information reproducing method for extracting recording control information from a wobbling signal reproduced from a first wobbling area of the information recording medium according to claim 1, wherein the reproduction is performed from the first wobbling area. The recording control information from the wobbling signal to be used is commonly used for two information recording tracks adjacent to the first wobbling area, and the recording control information is read by the information read from the first wobbling area. A recording control information reproducing method, wherein the two information recording tracks are processed as different information. 12. A recording control information reproducing method for extracting recording control information from a wobbling signal reproduced from a first wobbling area of the information recording medium according to claim 2, wherein the reproduction is performed from the first wobbling area. The recording control information from the wobbling signal to be used is commonly used for the two information recording tracks adjacent to the first wobbling area, and the recording control information is changed according to the signal level of the reproduction signal in the non-wobbling area. A recording control information reproducing method, wherein the two information recording tracks are processed as different information. 13. A recording control information reproducing method for extracting recording control information from a wobbling signal reproduced from the first wobbling area of the information recording medium according to claim 3, wherein the reproduction is performed from the first wobbling area. The number of maximum and / or minimum values of the reproduction signal of the asymmetric wobbling area is commonly used for the two information recording tracks adjacent to the first wobbling area and the recording control information from the wobbling signal is used. Is detected, the recording control information is processed as different information for the two information recording tracks, respectively. 14. An information recording / reproducing apparatus for recording / reproducing on / from the information recording medium according to claim 2, wherein the reproducing means reproduces a wobbling signal from the first wobbling area, and the wobbling signal from the reproducing means. Are commonly used for two information recording tracks adjacent to the first wobbling area, and are different from the wobbling signal for the two information recording tracks depending on the signal level of the reproduction signal of the non-wobbling area. And a control unit for obtaining the recording control information. 15. An information recording / reproducing apparatus for recording / reproducing information on / from the information recording medium according to claim 3, wherein reproducing means reproduces a wobbling signal from the first wobbling area, and a wobbling signal from the reproducing means. Is commonly used for two information recording tracks adjacent to the first wobbling area, and the number of the maximum value and / or the minimum value of the reproduction signal of the asymmetrical wobbling area is detected, whereby the wobbling An information recording / reproducing apparatus comprising: control means for obtaining different recording control information for each of the two information recording tracks from a signal.