JP2004006049A - Information recording medium, apparatus and method for recording and reproducing information - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize a largest storage capacity by combining a land/groove recording system and a CLV (constant liner velocity) system in a rewritable optical information recording medium. <P>SOLUTION: In the information recording medium of which the track for recording information is formed spiral, the track is constituted of a plurality of sets, each set is constituted of a first block A including a first address area 21 and a second block B including a second address area 22, each set also includes a wobble address area 23 formed on the first or second address area and indicating the address of each set on the information recording medium, the wobble address area 23 is dispersedly arranged so that its length becomes less than a half the entire length of the track and also, the wobble address area is provided to one of the first and second address areas so that the wobble address area is not overlapped between the adjacent tracks. <P>COPYRIGHT: (C)2004,JPO

Description

The present invention relates to a wobble modulation method and a CLV (Constant Linear Velocity) compatible recording format in a recordable optical information storage medium such as a DVD-RAM.

The current DVD-RAM standard uses the L / G (Land and Groove) recording method, in which recording marks are recorded on both spirally formed land (land) and groove (groove) tracks with the aim of improving the recording density. are doing.

In the current DVD-RAM standard, the basic policy was to "match the recording conditions (recording power and recording pulse conditions) of the land and groove". Therefore, a ZCLV (Zoned Constant Linear Velocity) method has to be adopted in order to match the width of the land with the width of the groove, or to match the wobble condition of the land with the groove. In the ZCLV method, a recording area on an optical disk is divided into a plurality of donut-shaped zones, and the rotation speed is constant in each zone, and the rotation speed is lower in an area outside the disk.

境界 The boundary between the land and the groove is formed in a wave shape, and this wave-shaped boundary is called wobble. The wobble signal obtained from this wobble can be used to control the rotation speed of a spindle motor that rotates the optical disk, or to generate a sampling clock signal when an analog reproduction signal from the optical disk is sampled and converted into a digital signal. . Also, the sector address of the optical disk can be recorded using this wobble.

In the ZCLV system, in the same zone, adjacent wobbles are synchronized (that is, not shifted in the tangential direction of the track), and the wavelength (mechanical size) of the wobble is longer toward the outside of the disk, and the wobble is optically picked up by an optical pickup. The wavelength of the wobble signal obtained by tracing is constant.

(4) When a complete CLV (Constant Linear Velocity) method is adopted as a recording method for an optical disc, the storage capacity can be improved as compared with the case where a ZCLV method is adopted. However, when the CLV method is adopted, there arises a problem that wobbles in the land portion and the groove portion are not synchronized.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and in an optical information storage medium capable of recording, an information storage medium realizing the highest storage capacity by combining an L / G recording method and a CLV method. An object of the present invention is to provide an information recording / reproducing device.

In order to achieve the above object, an information storage medium according to an embodiment of the present invention is an information storage medium in which tracks for recording information are formed in a spiral shape, wherein the tracks are configured by a plurality of sets. Each set is composed of a first block including a first address area and a second block including a second address area. Each set is also formed in the first or second address area and each set is formed on the information recording medium. The wobble address area is distributed so that the length thereof is less than half of the total track length, and the wobble address is also allocated between adjacent tracks. It is provided in one of the first and second address areas so that the address areas do not overlap.

As described above, according to the present invention, land / groove (on-groove / in-groove) recording and CLV recording can be simultaneously achieved, and stable formation of a recording mark and reproduction from the recording mark can be achieved for both the land and the blue. .

Hereinafter, this embodiment will be described with reference to the drawings.

1A is a front view (view from above) of a rewritable information storage medium (optical disc) 1 according to the present invention, FIG. 1B is a partially enlarged view of FIG. 1A, and FIG. 2 is a partially enlarged sectional view of the information storage medium 1. FIG. As shown in FIG. 1C, in the information storage medium 1, a recording layer 12 is formed on a support substrate 11 having a thickness of 1.0 to 1.2 mm, and a transparent protective layer having a thickness of 25 to 300 μm is formed thereon. 13 is formed, and has a structure in which the recording layer 12 is irradiated with the laser beam 14 via the transparent protective layer 13. The laser beam 14 irradiates the information storage medium 1 via the objective lens 15.

In the present invention, in land-groove recording, a concave portion (groove portion) viewed from the laser beam 14 is called an in-groove portion 2, and a convex portion (bank portion) is called an on-groove portion 3, and a boundary between the in-groove portion 2 and the on-groove portion 3. The wall surface is defined as a wall portion 4.

According to the vector field analysis, the size of the focused spot of the laser beam 14 irradiated on the recording film 12 is relatively large, and the size of the focused spot irradiated on the in-groove portion 2 is relatively wide. Is characterized in that the size of the condensed spot irradiated on the surface is relatively narrowed.

(4) As a result, the resolution of the reproduction signal from the recording mark 5 recorded in the in-groove section 2 is relatively low, so that the reliability of the reproduction signal from the recording mark 5 recorded in the in-groove section 2 is low. Further, when the recording mark 5 is formed in the in-groove portion 2, a cross-erasing phenomenon that erases the recording mark 5 already recorded on the adjacent on-groove portion 3 is likely to occur.

Since the resolution of the reproduction signal from the recording mark 5 recorded in the on-groove section 3 is relatively high, the reliability of the reproduction signal from the recording mark 5 recorded in the on-groove section 3 is high. Further, when the recording marks 5 are formed in the on-groove section 3, a cross-erasing phenomenon that erases the recording marks 5 already recorded on the adjacent in-groove section 3 hardly occurs.

The present invention has a great feature in a recording method which aims at increasing the capacity of an information storage medium by utilizing the results of the vector field analysis.

(1) As shown in FIG. 1, in the in-groove portion 2 where the reliability of the reproduction signal from the recording mark 5 is relatively low, the wall portions 4 on both sides are set so as to wobbled (meander) in the left-right direction. That is, the wobbles 2a and 2b on both sides of the in-groove portion 2 are not displaced from each other in the circumferential direction of the information storage medium 1 (vertical direction in the figure). In the present embodiment, the CLV method is employed with the aim of increasing the capacity, and the frequency of the wobble signal obtained from the wobble is constant over the entire surface of the disk.

ウ ォ ー If the CLV method is simply adopted, wobbles are not synchronized in the in-groove portion and the on-groove portion. As a result, the widths of the in-groove portion 2 and the on-groove portion 3 change depending on the location, and the change in the amount of the reproduction signal caused by the change in the leakage leaks into the reproduction signal from the recording mark 5, and the characteristics of the reproduction signal from the recording mark 5 change. Deterioration occurs.

信号 Since this signal is transferred to the synchronous code position detecting section 45 and the demodulating circuit 52 in the recording / reproducing apparatus shown in FIG. 3 described later, the processing performance of the synchronous code position detecting section 45 and the demodulating circuit 52 is reduced. In order to eliminate this adverse effect, in the present embodiment, the wobble positions of the wall portions 4 on both sides of the on-groove portion 3 obtained by the vector field analysis result and having “high reliability of the reproduced signal” are shifted. I have.

Next, an information recording / reproducing apparatus according to the present invention will be described.

FIG. 2 shows a block of a part related to a recording system in the information recording / reproducing apparatus. The recording main data (source data or user data) is sent to the predetermined information adding unit 68 via the interface unit 42. In the predetermined information adding section 68, the source data is subdivided in sector units.

When the medium used for recording is a rewritable information storage medium, the predetermined information adding section 68 adds the data ID, IED, data type, preset data, and reserved area of the sector before the main data portion. , EDC is added after the main data portion. The data ID added at this time is obtained from the data ID generation unit 65, and the preset data is obtained from the preset data generation unit 66.

On the other hand, when the medium used for recording is a read-only information storage medium, the data ID, IED and copyright management information of the sector are added before the main data portion in the predetermined information adding section 68, and the main data portion is added. Is added after the EDC. The data ID added at this time is obtained from the data ID generation unit 65, and the copyright management information is obtained from the data generation unit 67 for copyright management information.

The sector data generated in the predetermined information adding unit 68 is sent to the data arrangement partial exchanging unit (or data extracting unit) 63. The data arrangement part exchange section 63 extracts specific data of the transmitted sector data.

(4) The extracted specific data and the entire sector data are sent to the scramble circuit 57. The scramble circuit 57 performs a scramble process on the entire sector from the beginning to the end of the sector.

The sector data thus scrambled is sequentially sent to the ECC encoding circuit 61. The ECC encoding circuit 61 performs ECC encoding on the transmitted sector data in units of a predetermined number (for example, 16 to 32 sectors).

The data subjected to the ECC encoding is sent to the modulation circuit 51. The modulation circuit 51 performs a predetermined modulation (for example, 8/16 modulation or the like, but the modulation is not limited to this method) on the transmitted data while obtaining necessary information from the modulation conversion table recording unit 53. The modulated data is sent to the data combining unit 44.

Of the modulated data sent to the data synthesizing unit 44, the value of the digital sum value (DSV) of the modulated data (eg, 6 channel bits) at the end of each sector is converted to a DSV value calculating unit. Calculated at 48. The calculated DSV value is sent to the synchronization code selector 46.

The synchronization code selector 46 is based on the DSV value calculated by the DSV value calculator 48 and the lower n-bit data from the preset data generator 66 or the lower n-bit data from the copyright management information data generator 67. Then, a specific (optimum) synchronization code is selected from various types of synchronization code tables recorded in the synchronization code selection table recording section 47.

The synchronization code in the synchronization code table selected from the synchronization code selection table recording unit 47 by the synchronization code selection unit 46 is alternately arranged with the modulation data from the modulation circuit 51 in the data synthesis unit 44.

The data thus constructed is written to a rewritable information storage medium (RAM disk, RW disk, or the like employing a phase change recording method) via the information recording / reproducing unit 41. The information recording / reproducing unit 41 includes an optical pickup, and records information, that is, forms a recording mark by irradiating the information storage medium with a laser beam.

On the other hand, if the combined data is for a read-only information storage medium,
(A) an R disk which is cut into a master disk for duplicating a ROM disk by an original disk recording unit of a ROM disk; Such as a disc using a coloring dye).

The operation of each block element of the above-described device is controlled by the MPU therein using the RAM therein as a work area in accordance with a control program written in the ROM in the control section 43. .

FIG. 3 is a block diagram for explaining a configuration of a reproducing system for reproducing information on a rewritable information storage medium or a read-only information storage medium, particularly in an information recording / reproducing apparatus.

(4) The information recording / reproducing unit 41 reproduces information by irradiating the information storage medium with a laser beam. The wobble signal demodulation circuit 50 demodulates a wobble signal from the reproduction signal input from the information recording / reproduction unit 41. The spindle motor rotation control circuit 60 controls the rotation speed of a spindle motor (not shown) that rotates the optical disk based on the wobble signal input from the wobble signal demodulation circuit 50.

The synchronization code position extraction unit 45 detects the synchronization code at the head of each sector recorded on the optical disk. The demodulation circuit 52 can know the position of the head of the sector of the reproduced data from the reproducing unit 41 and also the position of the synchronous code in the sector based on the information of the synchronous code from the synchronous code position extracting unit 45. In the demodulation circuit 52, the synchronization code included in the sector is deleted according to the synchronization code information from the synchronization code position extraction unit 45. Then, the data remaining in the sector after the deletion (they are 8/16 modulated) are demodulated based on the demodulation information from the demodulation conversion table recording unit 54.

The descrambling circuit 58 descrambles the data ID and IED portions of the scrambled data. The descrambled data ID and IED are extracted by the data ID part & IED part extraction part 71. The data ID section & IED section extraction section 71 sends the data ID and IED to the control section 43. The control unit 43 monitors the sequentially obtained data ID. Based on the contents of the descrambled data, the control unit 43 can detect the off-track. When it is detected that the track is off, the information can be read again within a short period of time.

The data demodulated by the demodulation circuit 52 is also sent to the ECC decoding circuit 62. The ECC decoding circuit 62 groups a predetermined number of sectors (16 or 32, for example) into one ECC block, ECC-decodes the ECC-encoded data, and sends the data to the descrambling circuits 58 and 59. I have.

The descrambling circuit 59 descrambles the entire main data section. The data after the descrambling process is sent to the data arrangement partial exchange section 64. The data arrangement part exchange section 64 sends the specific data in the sent data after the descrambling process to the data ID section & IED section extraction section 71.

(4) The data ID and IED in the descrambled data are detected by the data ID & IED unit extraction unit 71, and the data ID after error check is extracted. The error tick unit 72 of the DataID unit checks whether there is an error in the DataID. If there is an error, the ECC decoding circuit 162 corrects the error. Further, the main data after a predetermined length from the head position of each of the obtained sector data is extracted by the main data extracting unit 73 and output to the outside via the interface unit 42.

FIG. 4 is a flowchart showing a first embodiment of the information recording method applied to the recording / reproducing apparatus shown in FIGS. When mainly recording AV (Audio Video) information on the information storage medium 1, rewriting is not performed as frequently as PC information. Utilizing this feature, the information recording / reproducing apparatus of the present invention shown in FIGS. 2 and 3 records information on the information storage medium 1 as described below. The information storage medium 1 has a data area for recording information and a management area for managing information recorded in the data area. Content such as video data is recorded in a data area. The management of this process is entirely performed by the control unit 43 of FIGS.

1. Basically, recording is sequentially performed on an unrecorded area. 2. Even when the user instructs to rewrite the recorded information, the information to be rewritten is recorded in the unrecorded area, the previously recorded information is left as it is, and the display to the user on the management information is prohibited. After the recording on the entire surface of the information storage medium 1 is completed, the information newly designated by the user for recording is overwritten in an area where display to the user is prohibited for the first time.

4. That is, as in ST101 of FIG. 4, when there is an information recording instruction from the user, first, additional recording is performed from the in-groove portion inside the disc. When the user instructs to delete the file, the file is prohibited from being displayed to the user on the management information of the information storage medium 1, and the file recorded in the data area is not deleted. Even when the user instructs the file to be rewritten, the file is prohibited from being displayed on the management information on the management information without being overwritten, and is added to the unrecorded area.

(4) When the additional recording in the in-groove section is completed (YES in step ST103), additional recording is performed in the on-groove section (ST104). In this case as well, when the user instructs to delete or rewrite the file, display to the user on the management information of the information storage medium 1 is prohibited, and additional writing is performed.

(4) When the additional recording in the on-groove section is completed (YES in step ST105), the information is overwritten in the area of the file in the in-groove or on-blue section in which the deletion instruction or the rewriting instruction is issued by the user.

(4) According to the above recording method, the number of times of writing to the in-groove inside the disc is reduced, and the deterioration of the recording layer inside the disc can be prevented.

FIG. 5A shows a case where recording is performed only in the in-groove portion up to the middle of the information storage medium 1, and the area from the innermost circumference to the radius r indicates a recorded area 7 having only the in-groove portion. The unrecorded area 6 extends to the outer periphery. FIG. 5B is a partially enlarged view of the position of the radius r in FIG. 5A, and the recording mark 5 is formed halfway of the in-groove portion 2. FIG. 5C shows a state in which the recording in the on-groove section 3 is started after the entire area recording in the in-groove section 2 is completed. The area from the innermost circumference to the radius r is a recorded area 9 for both the in-groove portion and the on-groove portion, and the area from the radius r to the outermost circumference is the already-recorded area 8 only for the in-groove portion. FIG. 5D is a partially enlarged view of the position of the radius r in FIG. 5C. The recording mark 5 is formed halfway of the on-groove portion 3, and the entire recording mark 5 is formed for the in-groove 2. Has been recorded.

FIG. 6 is a flowchart showing a second embodiment of the information recording method applied to the recording / reproducing apparatus shown in FIGS.

In this method, after information is first added to the entire area of the in-groove 2 on the storage medium (record mark 5 is formed) as in steps ST201 to ST203, the user deletes or rewrites the information as in steps ST204 and ST205. The specified in-groove 2 is overwritten on the file area. After the recording on the in-groove 2 is completely completed in this way, the recording on the on-groove section 3 is performed as in steps ST206 to ST208.

As described above, the cross-erase phenomenon of the on-groove section 3 is likely to occur when recording in the in-groove section 2 as a vector field analysis result, so that the information is recorded on the in-groove section 2 first (in this case, the on-groove section 3 Does not cause the problem of cross-erase since the recording mark 5 is not formed), and the recording to the on-groove section 3 is started for the first time after the recording to the in-groove section 2 is completed. In the case of recording on the on-groove portion 3, since the cross-erasing phenomenon of the in-groove portion 2 is relatively hard to occur, the recording mark already recorded on the in-groove portion 2 when the recording mark 5 is formed on the on-groove portion 3 is formed. Unnecessary erasure (cross erase) to No. 5 is hard to occur. Therefore, according to the present embodiment, the influence of cross-erase in land (on-groove) / groove (in-groove) recording can be reduced, and the track pitch can be reduced by the CLV method, thereby improving the recording capacity of the information storage medium. Can be achieved.

As another embodiment of the present invention, a method of utilizing wobble signals, which change synchronously between left and right wall portions 4 formed in the in-groove portion 2, as address information on the information storage medium 1 is shown in FIGS. This will be described with reference to FIG.

Ｆ The FSK (Frequency Shift Keying: information of “1” and “0” is added by frequency change) is adopted as a recording format of address information in a wobble shape. Assuming that the frequencies used for FSK are f1 and f2, wobbles having frequencies of f1 and f2 are formed in a wobble address area (described later). On the wall between the wobble address area and the next wobble address area, a wobble having a frequency of f3 which is much lower than f1 and f2 is formed. However, in the following embodiments, the wall between the wobble address area and the next wobble address area will be described as a straight line for the sake of simplicity.

Paying attention to the in-groove portion 2 in FIG. 7, most of the left and right wall portions 4 of the in-groove portion 2 are straight without being wobble. Meandering).

Generally, as shown in FIG. 7, a wobble provided on a rewritable optical disc such as a DVD-RAM has a size such as one sector defined as one set, and each set includes a block A and a block B. Are used as address areas. The address area of the block A is defined as an odd area 21, and the address area of the block B is defined as an even area 22. The odd region 21 has a total length ratio of 1/4 to the entire track length along the circumference of the information storage medium 1, and the even region 22 has a total length ratio of 1/4.

(1) As shown in FIG. 1C, a change in the total amount of laser light 14 reflected by the recording layer 12 and passing through the objective lens 15 is detected, and a reproduction signal from the recording mark 5 is detected. On the other hand, of the laser light 14 reflected by the recording layer 12 and passing through the objective lens, the total light amount of the laser light 14 passing through the right side of the objective lens optical axis shown by the dashed line in the figure and the left side of the objective lens optical axis The wobble detection signal is obtained by calculating the difference between the total amount of the laser beam 14 passing through. The wobble detection signal thus obtained is subjected to signal processing in the wobble signal demodulation circuit 50 shown in FIG. 3, and is decoded as address information on the information storage medium 1. As the wobble detection signal, for example, a waveform substantially the same as the wobble shape of the in-groove portion 2 right and left wall surfaces 4 in the odd region 21 shown in FIG. 7 is obtained.

In the case where the condensed spot condensed on the recording film 12 of the information storage medium 1 traces on the in-groove portion 2, the wobble signal demodulation circuit 50 detects the wobble signal in the odd region 21 in FIG. Detects address information. When the focused spot is traced on the on-groove section 3, a wobble signal obtained when passing through the wobbled section of the wall section 4 of the adjacent (inner peripheral) in-groove section 2 is detected. Detect address information. A wobble detection signal obtained from the adjacent (inner circumferential side) in-groove portion 2 obtained when tracing on the on-groove portion 3 and a wobble detection signal obtained from the odd region 21 when tracing on the in-groove portion 2 The signals have basically the same waveform.

(3) Although not shown in FIG. 3, a track shift detection signal is obtained because the focused spot traces the in-groove portion 2 or the on-groove portion 3 stably. As the track shift detection signal, a track shift detection signal of the opposite polarity is obtained when tracing on the in-groove section 2 and when tracing on the on-groove section 3. The controller 43 determines whether the wobble detection signal indicates the address information on the in-groove section 2 or the address information on the on-groove section 3 by detecting the polarity of the track shift detection signal.

In the present invention, recording on the in-groove section 2 and then recording on the on-groove section 3 have been described. In the present embodiment, the setting order of the address numbers matching the recording order is determined. That is, if the address number of the in-groove portion 2 detected from the wobble signal obtained in the odd region 21 is “i”, “i” is also detected as the address number in the on-groove portion 3 on the outer peripheral side. This is because the address number can be obtained from the wobble signal on the wall surface 4 of the in-groove portion 2 adjacent to the inner peripheral side when the on-groove portion 3 is traced. Assuming that the last address number of the in-groove section 2 at the outermost periphery of the information storage medium 1 is “j”, the control section 43 calculates an on-groove address as follows.

“J + i”
That is, the control unit 43 calculates the address number directly from the wobble signal detected in the in-groove unit 2, but as the address number when tracing on the on-groove unit 3, the address information directly detected from the wobble signal is used. Is added to the address number "j" of the in-groove portion 2 at the outermost circumference to calculate the address number.

(4) As described above, after information is recorded on the in-groove section 2, the information is recorded on the on-groove section 3. However, a feature of the present invention is that one of the land (on-groove) area and the groove (in-groove) area is recorded first, and after the recording on that side is completed, the recording is started on the other area. Therefore, as another embodiment, a method of recording on the in-groove section 2 after recording on the on-groove section 3 is also within the scope of the present invention.

Next, another embodiment of the information storage medium according to the present invention will be described.

In order to stably detect a wobble signal when trading on the on-groove portion 3, if one (right or left) wall surface of the on-groove portion 3 is wobbling, the other wall surface must be straight. There is a need to be in a state. When recording is performed by the complete CLV method as in the present invention, the right and left wall surfaces of the on-groove portion 3 may wobble at the same time depending on the radial position of the information storage medium 1 as shown in FIG. In order to avoid this phenomenon, in this embodiment, the wobble place is moved from the odd area 21 to the even area 22 as shown in FIG. That is, when only the in-groove portion 2 is viewed, wobbles are alternately arranged in the odd region 21 and the even region 22 every other line of the in-groove portion 2. That is, in the information storage medium according to the present embodiment, the wobbled address is recorded in the even area adjacent to the in-groove adjacent to the in-groove in which the wobbled address is recorded in the odd area.

Next, still another embodiment of the information storage medium according to the present invention will be described.

In FIG. 7, in the method of reading address information during tracing on the on-groove section 3, the wobble of the wall of the in-groove area 2 on one side is detected. FIG. 9 shows a wobble configuration of the information storage medium according to the present embodiment. As shown in FIG. 9, the wobble address area 23a of the in-groove section 2 and the on-groove section 3 are separated from each other, and the wall of only one side of the adjacent in-groove section 2 is wobbled in synchronization. That is, in the information storage medium according to the present embodiment, one of the two on-groove sections 3 adjacent to both sides of the in-groove section 2 of the wobble address area 23 has a synchronous structure in the address area 23 in the same manner as the in-groove section. are doing. As described above, in the wobble address area 23c of the on-groove area, since the left and right wall surfaces of the on-groove section 3 have a structure that wobbles in synchronization, the detection of address information by the wobble detection signal in the on-groove section 3 The stability and detection reliability are greatly improved, and the reproduction accuracy of the address information is increased.

FIG. 3 is a diagram showing a configuration of an in-groove section and an on-groove section of the information storage medium according to the present invention. 2 is a block diagram illustrating a configuration of a recording system of the information recording / reproducing apparatus according to the present invention. 2 is a block diagram showing a configuration of a reproduction system of the information recording / reproducing apparatus according to the present invention. 4 is a flowchart showing a first embodiment of an information recording method applied to the recording / reproducing apparatus shown in FIGS. 2 and 3. FIG. 4 is a diagram for explaining a recording method according to the present invention. 4 is a flowchart showing a second embodiment of the information recording method applied to the recording / reproducing apparatus shown in FIGS. 2 and 3. 1 is a first embodiment of a wobble address structure according to the present invention. 5 shows a second embodiment of the wobble address structure according to the present invention. 9 shows a third embodiment of the wobble address structure according to the present invention.

Claims (5)

In an information storage medium in which a track for recording information is formed in a spiral shape,
The track is composed of a plurality of sets,
Each set includes a first block including a first address area and a second block including a second address area,
Each set also includes a wobble address area formed in the first or second address area and indicating an address of the set on the information recording medium,
The wobble address areas are dispersedly arranged so that the length is less than half of the entire track length,
The information storage medium, wherein the wobble address area is provided in one of the first and second address areas so that the wobble address areas do not overlap between adjacent tracks. A track for recording information is formed in a spiral shape, and the track includes a plurality of sets, each set including a first block including a first address area and a second block including a second address area. Each set includes a wobble address area formed in the first or second address area, the wobble address area indicates an address of the set on the information recording medium, and the wobble address area is A reproducing method for reproducing address information from an information storage medium provided in one of the first and second address areas so that the wobble address areas do not overlap between adjacent tracks;
Irradiating the information storage medium with a laser beam to reproduce information, and providing a reproduced signal;
Detecting a wobble signal from the reproduction signal and providing a wobble detection signal;
Reproducing the address information indicated by the wobble address area from the wobble detection signal;
An information reproducing method, comprising: A track for recording information is formed in a spiral shape, and the track includes a plurality of sets. Each set includes a first block including a first address area and a second block including a second address area. Each set includes a wobble address area formed in the first or second address area, the wobble address area indicates an address of the set on the information recording medium, and the wobble address area is A reproducing apparatus for reproducing address information from an information storage medium provided in one of the first and second address areas so that the wobble address areas do not overlap between adjacent tracks;
Means for irradiating the information storage medium with a laser beam to reproduce information and provide a reproduced signal;
Means for detecting a wobble signal from the reproduction signal and providing a wobble detection signal;
Means for reproducing address information indicated by the wobble address area from the wobble detection signal;
An information reproducing apparatus, comprising: A track for recording information is formed in a spiral shape, and the track includes a plurality of sets. Each set includes a first block including a first address area and a second block including a second address area. Each set includes a wobble address area formed in the first or second address area, the wobble address area indicates an address of the set on the information recording medium, and the wobble address area includes: A method of recording information on an information storage medium provided in one of said first and second address areas so that said wobble address areas do not overlap between adjacent tracks,
Irradiating the information storage medium with a laser beam and providing a reproduction signal from the reflected light;
Detecting a wobble signal from the reproduction signal and providing a wobble detection signal;
From the wobble detection signal, decoding the address information indicated by the wobble address area,
Recording an information at a desired position in the in-groove and on-groove based on the decoded address information. A track for recording information is formed in a spiral shape, and the track includes a plurality of sets, each set including a first block including a first address area and a second block including a second address area. Each set includes a wobble address area formed in the first or second address area, the wobble address area indicates an address of the set on the information recording medium, and the wobble address area includes: An apparatus for recording information on an information storage medium provided in one of said first and second address areas so that said wobble address areas do not overlap between adjacent tracks,
Means for irradiating the information storage medium with a laser beam and providing a reproduction signal from the reflected light;
Means for detecting a wobble signal from the reproduction signal and providing a wobble detection signal;
Means for decoding the address information indicated by the wobble address area from the wobble detection signal,
An information recording method, comprising: means for recording information at desired positions in the in-groove and on-groove based on the decoded address information.

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