JP2002358654A - Illegal copy prevention method, optical disk and control program - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an unauthorized copy prevention method capable of easily determining whether an optical disk is a regular hybrid disk or an optical disk copied illegally. SOLUTION: A pre-pit area other than a lead-in area 11 and a lead-out area 14 of a hybrid disc is
The wobble amount of the pit is formed so as to be equal to or less than a predetermined amount, and the relevant portion is referred to when reproducing the hybrid disc. If it is detected that the wobble amount of the pit is equal to or less than a predetermined amount, it is determined that the pit is a regular hybrid disk. Since an optical disk such as a CD-R or the like has grooves wobbled in advance over the entire area, even if the hybrid disk is copied and reproduced, the normal wobble amount is detected and it can be determined that the illegal copy has been performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an optical disk on which various information is recorded or on which various information is recorded. More specifically, a method for preventing unauthorized copying by detecting whether or not an original optical disk has been illegally copied, an original optical disk that is not illegally copied, and a control applied to a reproducing apparatus that reads the optical disk About the program.

[0002]

2. Description of the Related Art As a medium for recording digital information, a music CD in which data is recorded in advance, a CD-ROM in which a program or the like is recorded, a CD-R (CD-Recordable) in which data is recorded later, or CD-RW
(CD-Rewritable), a hybrid disk having both a read-only ROM area and a recordable / reproducible RAM area.

[0003] The optical disks such as CDs and CD-ROMs mentioned above transfer a prepit array formed on a master by a master exposure apparatus to a stamper (called mastering).
The stamper is used as a mold and transferred to a molded substrate. Then, a reflective film, a protective film, and the like are applied to the molded substrate, and digital data is recorded as pre-pits together with time information (subcode time). Data is reproduced based on the time information recorded in the pre-pits. It has become so. These CDs, CD-ROMs, and the like are read-only recording media, and are produced in large quantities at factories.

The data array of this read-only optical disk is
As shown in FIG. 6, the entire area pre-pits are arranged in the following order: a lead-in area 61 in which disc information is recorded, management information 62 such as a directory, data 63 such as required programs and music, and a lead-out area 64 which is a buffer area. Has been recorded. Accordingly, since the entire area of the optical disk is not wobble (meandering: details will be described later), the wobble CNR (Carrier Noise Ratio: difference between wobble signal and noise) is naturally 0 (dB).

On the other hand, as a writable CD,
CD-R (CD-Recordable), CD-RW (CD-Rewrita
ble). In these media, wobble grooves are formed on the entire surface.
TIP time information (absolute time information by a guide groove) is recorded. A recording film (a dye or the like for CD-R, a phase change film for CD-RW), a reflective film, a protective film, and the like are formed on the molded substrate on which the wobble groove is formed. C to match ATIP time
By writing pits with a DR / RW writer,
The subcode time and data are recorded.

[0006] The groove is a recording guide track generally used in a recordable optical disk.
A pit is recorded thereon by a laser. This groove is
When the substrate is formed, it is formed by transfer from a mold, and the pitch of the groove is 1.6 μm, which is the same as that of the CD, and has a spiral shape. The wobble means that the above-mentioned groove meanders in the track direction (radial direction).
e: wobble), and this is called wobbling. The CD-R / RW writer reads the ATIP time information in the blank disk using the wobble signal.

Before writing data (blank), this writable optical disk has only a wobble groove formed on the entire surface as described above, and is formed by replacing data with pits. The data is recorded. As shown in FIG. 7, the data array of the optical disk after data recording includes a lead-in area 71 in which information of the disk is recorded, management information 72 such as a directory,
Pits are recorded on the wobble groove in the order of data 73 such as required programs and music, and a lead-out area 74 which is a buffer area. When data is written in a plurality of times, as shown in FIG. 7, an unrecorded area where data can be further recorded after a recorded portion, that is, a pit area. The wobble CNR of this writable optical disk is usually 26 (dB) or more, so that a reading error does not occur. When the wobble CNR is 26 (dB) or less, that is, when the noise is large, a wobble signal reading error is likely to occur.

[0008] After the recording, both the ATIP time recorded in the wobble groove and the subcode time recorded in the pit are recorded. The ATIP time is reproduced from the push-pull signal, and the subcode is reproduced. Time is RF
Reproduced from the signal. In the area where pits are recorded, both time information can be reproduced, and in the unrecorded area, only the ATIP time can be reproduced. When performing additional recording, the writer performs an additional recording operation based on the ATIP time of a pit in the immediately preceding recorded area or the ATIP time of an unrecorded groove. Data reproduction is performed by a CD player or CD.
-Data is reproduced by a ROM player, a writer, or the like based on the subcode time recorded in the pit.

Finally, there is a hybrid disc having a read-only ROM area and a recordable / reproducible RAM area. This disc has a CD-R / RW in which pre-pits which are only used for reproduction are formed in part, and can be customized. In other words, this optical disk is highly convenient because various digital data can be pre-pitted in a read-only ROM area and can be additionally recorded in a RAM area later.

In the pre-pit portion of this hybrid disc, the pre-pits are wobbled or pre-pits are formed in the wobbled groove so that both the ATIP time and the subcode time can be reproduced in the same manner as the recorded CD-R / RW Let me. When writing to a hybrid disc with a writer, the ATIP time of the immediately preceding pre-pit,
Alternatively, an additional recording operation is performed based on the ATIP time of an unrecorded groove, and the reproduction of the pre-pit portion is performed based on the subcode time recorded in the pit.

As shown in FIG. 8, a data array of the hybrid disc before data recording includes a lead-in area 81 in which information of the disc is recorded, management information 82 such as a directory, and data 83 such as required programs and music. , And a lead-out area 84 which is a buffer area. Following the pre-pit area, the area is an unrecorded area where a user or the like additionally writes data. This unrecorded area also has a wobble groove formed following the pre-pit area. The wobble CNR has a pre-pit area and an unrecorded area of usually 26 dB or more as in the case of the CD-R and CD-RW described above. No errors occur.

Under the present circumstances where write-once optical discs such as CD-Rs can be provided at low cost, unauthorized copying of music, images, game software, business software, etc. is widespread due to its easiness. That is the fact. The above-mentioned hybrid disc is no exception. For example, Japanese Patent Laid-Open Publication No. 2000-2317
No. 22, JP-A-11-31012, and Japanese Patent No. 3061098.

The invention disclosed in Japanese Patent Application Laid-Open No. 2000-231722 has second information recorded by wobbling only a phase pit sequence in a lead-out area in a data area section of an optical disc by a predetermined modulation method. We propose a read-only optical disk and a dedicated playback device. According to the present invention, when unauthorized copying is performed,
No information can be physically copied to a write-once optical disc, and thus all of the data cannot be recorded.

The invention disclosed in Japanese Patent Application Laid-Open No. 11-317012 is limited to a read-only optical disk on which AV data such as a movie or music is recorded. This optical disk is a pre-recorded pre-pit on a recordable optical disk. The scramble key is recorded in a portion corresponding to the area of. Then, the optical disk reproducing apparatus dedicated to the present invention recognizes the scramble key and performs descrambling processing to reproduce AV data. Therefore, even if the optical disk to which the present invention is applied is illegally copied onto a recordable optical disk, the scramble key required for reproducing the AV data is not physically recorded, and whether the optical disk is dedicated to the present invention or not. Even if an attempt is made to reproduce by the reproducing apparatus, there is no scramble key for performing the descrambling process, or the AV data which has been illegally copied is scrambled and cannot be reproduced.

According to the invention disclosed in Japanese Patent No. 3061098, a unique pit row having a different shape or arrangement from regular pits is formed in pits conforming to a normal standard on an optical disc. In the specific pit row portion, a wobble signal is obtained from the tracking error signal, or the light amount signal changes. Therefore, if a dedicated optical disc reproducing apparatus capable of recognizing this and an optical disc are prepared, the dedicated optical disc reproducing apparatus recognizes that the disc is a regular optical disc. However, the illegally copied optical disk is not copied up to the unique pit even if the regular optical disk including the unique pit is copied, so that the illegal copied disk can be identified by detecting the unique pit.

[0016]

SUMMARY OF THE INVENTION However, Japanese Patent Application Laid-Open
The invention disclosed in Japanese Patent Application Publication No. 000-231722 describes that the pit row is meandered (wobbled) in the track direction to record the second information, and the second information prevents the copy, but the wobble is prevented. Cannot be used with media already used. Therefore, it cannot be used in, for example, a CD-R / RW.

Further, the optical disk according to the present invention regards the optical disk on which the second information is recorded as a legitimate one, and enables reproduction by a dedicated reproducing device. The column of effects of the invention states that it is possible to provide a read-only disc that cannot physically record all data on a recording disc. However, this recording cannot be performed because the second information cannot be recorded. It seems to suggest that.

Therefore, since the second information is not recorded on the illegally copied optical disk, even if an attempt is made to reproduce the information by the dedicated reproducing apparatus of the present invention, the optical disk is not a regular optical disk (the second information is recorded). It is thought that the block is blocked. In other words, the illegally copied optical disk does not record the second information, but does record the necessary digital data such as programs, music, and movies. I think that the.

That is, as described in paragraph number 0026, the optical disk of the present invention can be reproduced not only by the dedicated reproducing apparatus of the present invention but also by the conventional reproducing apparatus. Can reject the reproduction based on the second information, but it can be concluded that the conventional reproducing apparatus which does not require the second information can reproduce the illegally copied optical disk without any problem.

In the invention disclosed in JP-A-11-317012, copying is prevented by recording a key code at a non-recordable address of a recording medium. It cannot be used for a recording medium that does not have any. Therefore, for example, it cannot be used for CD-R / RW.

Further, according to the above-mentioned invention, a dedicated optical disk device (reproducing device) is required. Therefore, in the conventional optical disk device (reproducing device), not only the optical disk illegally copied but also the optical disk of the present invention It cannot be reproduced, and is considered to be extremely inconvenient and lack in versatility.

In the invention disclosed in Japanese Patent No. 3061098, as described in paragraph No. 0061, the optical disk of the present invention is stored in a CD-WO (CD-Write Onc).
e: a CD that can be written only once, which is synonymous with CD-R). Even if the data is copied, the data can be copied correctly because there is no work done on the data, and there is no error. Therefore, even if the illegally copied CD-WO is read by a normal CD-ROM drive or the like, it can be reproduced without any problem. However, the illegally copied C
When the D-WO is to be reproduced by the reproducing apparatus of the present invention, the wobbled unique pit structure cannot be copied, so that it cannot be reproduced.

Also, it can be interpreted that the absence of the wobbled unique pit structure includes not only the illegally copied optical disk but also the conventional regular optical disk without the wobbled unique pit structure. Therefore, in other words, an optical disc other than the dedicated optical disc of the present invention cannot be reproduced, and is inconvenient and lacks versatility similarly to the invention disclosed in Japanese Patent Application Laid-Open No. H11-31012. I think that the.

Therefore, the present invention provides an unauthorized copy preventing method which can easily determine whether the optical disk is a regular optical disk or an illegally copied optical disk. It is an object of the present invention to provide a control program which can be easily applied to a conventional CD-ROM reproducing device.

[0025]

In order to achieve the above object, grooves and pits formed on the entire surface are wobbled in the track direction to record control information such as addresses, and data such as software is recorded by pits. A method for preventing copying of an optical disc, comprising detecting whether or not the amount of wobble in a partial area of a wobbled pit is equal to or less than a predetermined amount to determine whether or not unauthorized copying has been performed. In the way.

The optical disk referred to in the above invention is a music CD
Read-only optical disks such as CD-ROMs used for computers and computers, and write-only optical disks such as CD-Rs and CD-RWs, and a read-only area (recorded by a maker) and a recordable area (recorded by a maker or a user) CD-R hybrid disc or CD having
-Includes all optical discs such as RW hybrid discs, but optical discs that are normally wobbled are write-once optical discs, and the present invention can be easily applied in the present situation only to wobbling in a read-only area. CD-R hybrid disc and CD-RW
It is a hybrid disc.

In this case, the wobble amount (meandering amount) of the pits in the wobbled pits of the hybrid disc, ie, the pits in the reproduction-only area of the hybrid disc is formed so as to be less than or equal to a predetermined value by the manufacturer. When reproducing a hybrid disc, the pit area is detected, and the disc is determined to be a legitimate disc. Therefore, even if an optical disc to which the present invention is applied is copied using a normal CD-R or CD-RW, the normal CD-R or CD-RW has continuous wobbling over the entire area. It is determined that the optical disk has been illegally copied.

It should be noted that music CD data copied and recorded on a CD-R or the like can be reproduced by a current audio-only CD reproducing apparatus without any problem.
A read-only optical disk such as a CD-ROM or a CD-ROM used in a computer may be wobbled with pits by a manufacturer to apply the present invention (claim 1).

Further, it is detected that the wobble amount in a partial area of the wobbled pit is equal to or less than a predetermined amount, and
When it is detected that the wobble amount is normal, it may be determined that the optical disk has been illegally copied, and the reproduction of data such as software may be controlled.

That is, when it is detected that the wobble amount of a part of the wobbled pits of the optical disk is normal, a normal CD-R or CD-RW has continuous wobbling over the entire area. Therefore, it can be determined that the optical disk has been illegally copied. At this time, the reproduction of data such as software recorded on the optical disk is controlled, for example, the reproduction is simply stopped, or "this disk was illegally copied. Playback is stopped with an error message such as "The playback is not possible with the disc", or the optical disc to which the present invention is applied inserted into the optical disc playback apparatus is automatically ejected. 2).

Further, it is possible to detect whether or not the above-mentioned wobble amount is equal to or less than a predetermined amount by determining whether or not the recognizable ATIP time can be read based on the wobble cycle. It is desirable to use this information. In this detection, it is determined whether or not the ATIP time can be read by seeking a pit area where the wobble amount is equal to or less than a predetermined amount or not. It is also possible to seek to the wobbled part and recognize that the wobble amount is less than or equal to the predetermined amount in only a part of the area, that is, determine whether the ATIP time can be read continuously. Is optional (claim 3).

According to a fourth aspect of the present invention, there is provided an optical disk in which grooves and pits spirally formed on the entire surface are wobbled in the track direction, and the wobble amount in a partial area of the wobbled pits is determined by an illegal copy. An optical disc characterized in that the presence or absence is equal to or less than a predetermined amount that can be detected or is eliminated.

The above-mentioned optical disk may be formed as an original CD by forming a wobble by pits except for a part of a normal read-only CD, and may be distinguished from a CD-R or the like in which grooves are wobbled over the entire area. An optical disk having a read-only ROM area and a recordable / reproducible RAM area, that is, a CD-ROM, may be used.
An R hybrid disc, a CD-RW hybrid disc, or the like is preferable, and the partial area is preferably a read-only ROM area. That is, since it is only these hybrid discs that have wobbled by pits in the read-only ROM area, the read-only ROM is determined by the manufacturer.
This is because it is easy to form a part of the pit group so as not to wobble like a normal read-only CD (claim 5).

It is desirable that the wobble amount is equal to or less than a predetermined amount or the distance between the pit row and the groove where the wobble amount is eliminated is provided at a predetermined distance (claim 6). Preferably, the region has a lead-in region and a lead-out region, and the partial region is provided in a region other than the lead-in region and the lead-out region. That is,
Depending on the optical disc playback device, some pits on the innermost circumference of the lead-in area cannot be recorded unless there is a wobble in this area, and pits that contact the groove, such as the lead-out area, are not wobbled. This is because they cannot. It should be noted that no problem occurs even if the area other than the lead-in area and the lead-out area cannot be reproduced even if the ATIP time cannot be reproduced (claim 7).

A detecting means for detecting whether the wobble amount of a part of the wobbled pits is less than or equal to a predetermined amount in the optical disk according to any one of claims 4 to 7, and said detecting means. Control means for judging that the optical disk has been illegally copied when it is detected that the wobble amount is normal, and controlling the reproduction of the optical disk. It is preferable that a program for functioning as control means is recorded in the partial area.

According to the above-mentioned invention, the wobble amount of the wobbled part of the pit is less than or equal to a predetermined amount that can detect the presence or absence of illegal copy, or the optical disk itself has lost it.
A program for recognizing that the optical disk is genuine is recorded. This program may be incorporated as a subroutine in a main program of a required application, or may be configured as an independent program, and its mode is arbitrary (claim 8).

Further, it is extremely preferable to provide a starting means for automatically starting the program when the optical disc is set in the optical disc reproducing apparatus. With such a configuration, an illegally copied optical disk such as a CD-R or the like has grooves or pits wobbled over the entire area. Therefore, the illegal optical disk can be simply reproduced by an existing optical disk reproducing apparatus. It is possible to easily determine. If it is determined that the reproduction is illegal, the reproduction of the illegal product is refused by stopping the reproduction of the optical disk reproducing device or forcibly ejecting the optical disk (claim 9).

An ATIP according to claim 8 or 9, wherein said detecting means can recognize based on a wobble cycle that said wobble amount is equal to or less than a predetermined amount.
It is desirable to determine whether the time can be read and to detect the time in order to use existing information without newly recording information. This detection is performed by seeking the pit area where the wobble amount is equal to or less than a predetermined amount or not, and
Judge whether the time can be read or not. Alternatively, it may be recognized that there is no ATIP time, that is, whether the ATIP time can be read continuously or not may be determined, and the seek range is arbitrary (claim 10).

Further, the control program may be a control program for reading digital data recorded on the optical disk by using the optical disk according to any one of claims 4 to 7. In this case, the wobble amount of a part of the wobbled pits is reduced. Detecting means for detecting that the wobble amount is normal or less, controlling means for judging that the optical disk has been illegally copied when it is detected that the wobble amount is normal, and controlling reproduction of the optical disk; And a start-up means for automatically starting the program when the program is set in the playback apparatus, and a control for causing a computer or an optical disk playback apparatus to function as the detection means, the control means, and the start-up means. Program. The control program may be directly incorporated in the optical disk reproducing device or may be used as a device driver of the optical disk reproducing device. However, a device driver that can directly use the existing optical disk reproducing device is preferable.
1).

The detecting means detects whether the wobble amount is equal to or less than a predetermined amount or not by judging whether or not the ATIP time which can be recognized based on the wobble period can be read, and newly records information. It is desirable to use the existing information without causing the pit area in which the wobble amount is equal to or less than a predetermined amount or not to be searched to determine whether the ATIP time can be read. And seek from the area immediately before the pit area to the wobbled area immediately after the pit area to clearly recognize that the wobble amount is less than or equal to a predetermined amount in only a part of the area. You may let me determine whether you can read it,
The seek range is arbitrary (claim 12).

[0041]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
An embodiment of the present invention will be described in detail. (Embodiment 1) As shown in FIG. 1, a hybrid disc according to Embodiment 1 includes a pre-pit area in which a manufacturer or the like previously records digital data and an unrecorded area in which a user or the like records desired digital data. In the pre-pit area, pits are wobbled except for a part of the area, and the unrecorded area is wobbled with grooves so as to be continuous with the pits.

The pre-pit area includes a lead-in area 11 in which information of a disc is recorded, management information 12 such as a directory, an application having a subroutine having a copy inspection function, and a data area 13 in which information used by the application is recorded. , And a lead-out area 14 which is a buffer area.
In addition, this hybrid disc has a lead-in area 1
1 and the area excluding the lead-out area 14, that is,
The pits are formed so as to eliminate the wobble amount of the pits between two areas of the management information area and the 12 data areas 13. As a result, the wobble CNR during this time is set to 0 (dB), while the wobble CNR is maintained at 26 dB or more in other places as in the case of a normal hybrid disc, and the ATIP
It is configured such that the time cannot be reproduced only in the 0 (dB) section.

The reason why the lead-in area 11 and the lead-out area 14 are excluded is that some innermost pits such as the lead-in area cannot be recorded without wobble in this area depending on the drive. Lead-in area 11
Is preferably wobbled. Further, in the case of the lead-out area 14, the pit area in contact with the groove cannot be additionally written in the groove unless it is wobbled.

A required application program is recorded in the data area 13. The application program includes a main program for causing a computer to perform required control such as image processing, spreadsheet calculation, and game, and a program copied illegally. And a subroutine program for self-detection.

This subroutine program includes a detecting means for detecting whether or not the wobble amount of a part of the wobbled pit is equal to or less than a predetermined amount by determining whether or not the ATIP time can be read, and a normal (wobble CNR) by the detecting means. : 26 (dB) or more), that is, when the ATIP time due to the wobble can be read, the reproduction of the optical disc is stopped and the reproduction is stopped. And a control means for activating an application main body (main program). When the application is activated, a subroutine program is activated first.

The unrecorded area is an area in which desired data or a program can be additionally recorded by an existing CD-R writer, and is the same as a conventional CD-R blank disc.

A series of operations when the hybrid disk thus configured is played back by a conventional optical disk playback apparatus will be described with reference to FIG. First, the hybrid disc according to the first embodiment is replaced with a CD or CD-RO.
When an M, a CD-R, or the like is set in a conventional optical disk reproducing apparatus capable of reproducing and reproduced, a subroutine program constituting an application starts first (step S100).

Designated by the subroutine program (the management information 12 and the data area 12, for example, 00/02
Start reproduction of information (ATIP seek to second) (step S)
101), it is determined whether the ATIP time of the portion can be read (step S102). If it is determined that the disk cannot be read (No at Step S102), the subroutine program recognizes that the disk is a regular hybrid disk and returns to the main program to start the application (Step S102).

When the hybrid disc of the first embodiment is illegally copied with a CD-R writer or the like, pits are formed on the groove over the entire area like other CD-Rs. All non-wobbled pit portions of the hybrid disc of the form are also wobbled. Therefore, when the optical disc is set in the optical disc reproducing apparatus and reproduced, in step S102, the ATI
Since the P time can be read (step S102, Ye
s) The application is terminated without being shifted to the main program upon being determined to be an illegal copy (step S)
104). This can prevent unauthorized use of the application.

(Second Embodiment) The hybrid disc of the second embodiment illustrates a case in which a subroutine program for detecting an illegal copy incorporated in the application exemplified in the first embodiment is made independent of copy detection software. The other components common to the first embodiment are denoted by the same reference numerals and description thereof is omitted. As shown in FIG. 3, the hybrid disk according to the second embodiment is prepit-recorded in the following order: a lead-in area 11, management information 12, copy detection software 21, a data area 22 in which a desired application is recorded, and a lead-out area. ing.

The copy detection software 21 detects a wobble amount of a part of the wobbled pits by determining whether or not the ATIP time can be read to determine whether the wobble amount is equal to or less than a predetermined amount, and detects the wobble amount by the detection means. If it is detected that the value is equal to or less than the predetermined value,
Control means for recognizing the hybrid disk as a legitimate hybrid disk when the P time cannot be read and for starting a desired application recorded in the data area 22, and for automatically starting the disk when the disk is set in the optical disk reproducing device Means.

As shown in FIG. 4, the hybrid disk according to the second embodiment configured as described above is a conventional optical disk reproducing apparatus capable of reproducing the disk from a CD, CD-ROM, CD-R, or the like. (Step S200), it is automatically started by the copy detection software starting means (Step S201).

Designated by the copy detection software 21 (the management information 12 and the data area 12, for example, 00:02
Start reproduction of information (ATIP seek to second) (step S)
202), it is determined whether the ATIP time of the part can be read (step S203). If it is determined that the disc cannot be read (No at Step S203), the disc is recognized as a regular hybrid disc, and the copy detection software 21 ends (Step S204). If the ATIP time of the portion can be read in step S203 (step S203, Yes), the medium is ejected as if it was illegally copied on a normal CD-R (forced ejection).
(Step S205).

As described above, in the present embodiment, the self discrimination program for detecting an illegal copy is recorded on the hybrid disc. However, as shown in FIG. 5, a buffer area 31 is provided in addition to the data area, and the buffer area 31 is provided. In this case, the copy detection may be performed by seeking this area by eliminating only the wobble. At this time, it is preferable that the control program as described above is recorded in the data area 32. If the lead-in and lead-out are not recorded, it is possible to perform copy detection by seeking this area without wobble in an area other than the last area of the data area.

Further, the copy detection software 21 exemplified in the embodiment may be incorporated in an optical disk reproducing device, or may be used as a device driver of the optical disk reproducing device. In this case, copy detection software 2 is added to the hybrid disc itself.
It is not always necessary to record 1.

[0056]

According to the first aspect, when an illegal copy is made on a recording medium having a wobble groove formed on the entire surface, there is no small or no wobble area in a predetermined area. Can be detected. According to the second aspect, unauthorized copying can be detected, and if detected, reproduction of data such as recorded software is prohibited, so that unauthorized use of data recorded on a recording medium can be prevented. . Claim 3 or 10
According to the ATIP that can be recognized based on the wobble cycle
Since it is determined whether or not the time can be read, it is detected that the wobble amount is equal to or less than a predetermined amount or not. Therefore, it is possible to easily detect the existing information without newly recording the information.

According to the fourth aspect, when an illegal copy is made on a recording medium having a wobble groove formed on the entire surface,
Since there is no small wobble area in the predetermined area, it is possible to provide an optical disc capable of detecting unauthorized copying. According to claim 5, the optical disk is a CD-R hybrid disk or a CD-R hybrid disk in which wobbling by pits is already formed in a read-only ROM area.
By limiting to a RW hybrid disk, it is easy for the manufacturer to form some pit groups in the read-only ROM area so as not to wobble like a normal read-only CD.

According to the sixth aspect, not only can unauthorized copy be detected, but also the distance between the pit row and the groove having a wobble amount equal to or less than a predetermined value and the groove is greater than a predetermined value. Since the wobble amount of the immediately preceding pit is equal to or more than a predetermined value, control information such as an address can be reproduced accurately, and therefore, additional writing can be performed accurately. Claim 7
According to the method, the wobble amount (meandering amount) of the pits is formed in an area other than the lead-in area and the lead-out area so as to be equal to or less than a predetermined value. It is possible to provide an optical disc that can be reliably detected by avoiding the problem that a pit portion in contact with a groove, such as a lead-out area, cannot be additionally written unless wobbled.

According to the eighth aspect, the wobble amount of the wobbled partial area of the pit is equal to or less than a predetermined amount capable of detecting the presence or absence of an illegal copy or the optical disk itself.
Since a program for recognizing that the optical disk is genuine is recorded, it is possible to determine whether or not the optical disk has been illegally copied to a CD-R or the like by using an existing optical disk reproducing apparatus. An optical disk that prevents unauthorized copying can be provided. According to the ninth aspect of the present invention, the optical disk according to the present invention is provided with a starting means for automatically starting the program when the optical disk is set in the optical disk reproducing apparatus. Therefore, an optical disk with excellent convenience can be provided.

According to claims 11 and 12, claim 4
By providing a control program for determining which of the optical discs 1 through 7 and the optical disc that has illegally copied the optical disc, it is possible to construct a system that can easily detect an illegal copy at no cost. In particular, by using it as a device driver, it can be easily applied to an existing optical disk reproducing apparatus.

[Brief description of the drawings]

FIG. 1 shows a data array of a hybrid disc and a wobble CNR corresponding to the data array in the first embodiment.
FIG. 3 is a schematic diagram showing an output state of FIG.

FIG. 2 is a flowchart illustrating a processing procedure of a subroutine program.

FIG. 3 shows a data array of a hybrid disc and a wobble CNR corresponding to the data array in the second embodiment.
FIG. 3 is a schematic diagram showing an output state of FIG.

FIG. 4 is a flowchart illustrating a processing procedure of copy detection software.

FIG. 5 shows a data array of a hybrid disc and a wobble CN corresponding to the data array in another embodiment.
FIG. 4 is a schematic diagram illustrating an output state of R.

FIG. 6 is a schematic diagram showing a data array of a conventional read-only optical disc and an output state of a wobble CNR corresponding to the data array.

FIG. 7 is a schematic diagram showing a data array of a conventional write-once optical disc and an output state of a wobble CNR corresponding to the data array.

FIG. 8 is a schematic diagram showing a data array of a conventional hybrid disc and an output state of a wobble CNR corresponding to the data array.

[Explanation of symbols]

 11 Lead-in area 12 Management information 13 Data area 14 Lead-out area 21 Copy detection software

Claims (12)

[Claims] 1. A method for recording control information such as an address by wobbling grooves and pits formed on the entire surface in a track direction, and preventing copying of an optical disk on which data such as software is recorded by pits. An unauthorized copy prevention method, characterized in that it is determined whether or not an unauthorized copy has been made by detecting that the wobble amount in a partial area of a wobbled pit is equal to or less than a predetermined amount. 2. A wobble amount in a partial area of a wobbled pit is detected to be equal to or less than a predetermined amount, and when it is detected that the wobble amount is normal, it is determined that an optical disk has been illegally copied. 2. The method according to claim 1, wherein the reproduction of the data is controlled. 3. An ATIP capable of recognizing, based on a wobble cycle, that the wobble amount is equal to or less than a predetermined amount.
3. The method according to claim 1, wherein the time is determined by detecting whether the time can be read. 4. An optical disk in which grooves and pits spirally formed on the entire surface are wobbled in the track direction, and the wobble amount of a part of the wobbled pits is a predetermined amount capable of detecting the presence or absence of unauthorized copying. An optical disc characterized by the following or eliminated. 5. The optical disk according to claim 1, wherein the optical disk has a read-only ROM area and a recordable / reproducible RAM area, and the partial area is a read-only ROM area. Item 4. The optical disk according to item 4. 6. The optical disk according to claim 5, wherein a distance between the groove and the pit row where the wobble amount is equal to or less than a predetermined amount or less is provided at a predetermined interval. 7. The read-only ROM area has a lead-in area and a lead-out area, and the partial area is provided in an area other than the lead-in area and the lead-out area. 7. The optical disc according to claim 6, wherein: 8. A detecting means for detecting that the wobble amount of a part of the wobbled pit is equal to or less than a predetermined amount, and an optical disk illegally copied when the detecting means detects that the wobble amount is normal. Control means for controlling the reproduction of the optical disc by judging that
8. A program for functioning as control means is recorded in said partial area.
An optical disc according to any one of the preceding claims. 9. An apparatus for automatically starting up the program when the optical disc is set in the optical disc reproducing apparatus, wherein the program functions as the starting means, the detecting means, and the control means. 9. The optical disc according to claim 8, wherein a program for causing the program to be executed is recorded in the partial area. 10. The apparatus according to claim 8, wherein the detecting means detects whether or not the ATIP time which can be recognized based on a wobble cycle can be read whether or not the wobble amount is equal to or less than a predetermined amount. Or the optical disc according to 9. 11. A control program for reading digital data recorded on an optical disc using the optical disc according to claim 4, wherein a wobble amount of a part of wobbled pits is equal to or less than a predetermined amount. Detecting means for detecting, an optical disk that has been determined to be an illegally copied optical disk when it is detected that the wobble amount is normal, and control means for controlling reproduction of the optical disk; Control means for causing a computer or an optical disk reproducing apparatus to function as the detection means, the control means, and the start means. 12. The apparatus according to claim 11, wherein the detection means detects whether the amount of wobble is equal to or less than a predetermined amount or not by judging whether or not an ATIP time that can be recognized is read based on a wobble cycle. Control program described.