JP2003346425A - Disk recording medium with correctness deciding function and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk recording medium with a correctness deciding function adapted to prevent illegitimate copying, etc., by adding the correctness deciding function to the medium and a method for manufacturing the same. <P>SOLUTION: A program loader 5 to be activated by reading out dummy index data and a first program 7 is recorded to a disk management region 1 and the first program 7 is recorded in an unused region after an ECB code of a usable recording unit 6-100 among usable recording units 6 of a data region 2. Index data pieces 11 and 12 and program pieces P1 and P2 are recorded in the unused regions after the ECB code of the usable recording units 6-1, 6-2, 6-10000, 6-10001 and the index data pieces and the program pieces are read out by the first program. The second program is restored and activated in accordance with the program pieces and the correctness of the disk recording medium is decided according to the normal index data restored in accordance with the index data pieces by the second program. <P>COPYRIGHT: (C)2004,JPO

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a music CD, a video CD, a data CD, an electronic book CD, a game software CD,
Music DVD, Video DVD, Data DVD, Electronic Book D
The present invention relates to a disk-shaped recording medium with a validity determining function and a method of manufacturing the same, which can prevent illegal use such as illegal copying by adding a validity determining function to various disk-shaped recording media such as VDs and game software DVDs. Things.

[0002]

2. Description of the Related Art CDs (Compact Discs), which are a kind of disk-shaped recording media currently on the market, include various types such as music CDs, video CDs, data CDs, electronic book CDs, and game software CDs. There are things. less than,
The format of a CD will be described using a music CD as an example.

As shown in FIG. 4, a music CD has a disk management area 1 located at the innermost circumference of a disk and a data area 2 located adjacent to the end of the disk management area 1.
And “Lead Out (silence data)” 3 arranged adjacent to the end of the data area 2. Such a format is defined in “Red Book” which is a definition standard of CD-DA. At the beginning of the disk management area 1, "Lead In (silence data) is stored, and subsequent portions are index data (index 1, index 2,...) Corresponding to each of the recorded music pieces. (A maximum of 99 pieces of index data can be stored.) The track 1a arranged at the illustrated position in the disc management area 1 is a track that is read when an error occurs, but is a normal music. In the case of a CD, no data is recorded on the track 1a.

In the disk management area 1 and the data area 2, sectors (one sector = 24 bytes × 98 = 2352 bytes) are used as recording units. For example, in the case of a music CD, 75 recording units are used. To compose music data for one second. This recording unit is defined as shown in FIG. 5, and the beginning of the recording unit is S indicating the start of the recording unit.
A TF code is arranged, a recording area used for recording data or the like is arranged after the STF code, an EOF code indicating the end of a recording unit is arranged after the recording area,
EC indicating the error check of the recording unit after the F code
B code is arranged. When actually recording certain data, it is extremely rare that the entire data fits in one recording area, so that the data is recorded over a plurality of recording units. Such a recording unit having an unused area outside the recording area is generated. In this case, the unused area outside the recording area
Since it is located outside the area between the STF code and the EOF code, it cannot be used as a recording area, and even if some data can be recorded,
It is impossible to read the data by ordinary means.

[0005] Most of the currently available CDs do not have "copy protection measures". for that reason,
For example, a music CD is transferred to a personal computer (hereinafter referred to as P
C) using a CD-R drive or the like.
(Write-once type CD) Digitally copy the whole media or extract the music data in a music CD using a CD drive of a PC, convert it to MP3 (MPEG Audio Layer-3) format, and convert the MP3 file to the Internet. Uploading files on top of them and exchanging files are rampant. Such a fraudulent act has caused a great deal of damage to music CD manufacturing and sales companies.

[0006] On the other hand, various CDs which have been subjected to "copy protection measures" have been proposed so far.
(1) A type in which data different from original data such as identification data is inserted into a predetermined area of a CD using a standardized format, and recorded data is rearranged,
(2) It is classified into a type that uses a special format that is different from the standardized format and has copy protection measures. For example, the above-mentioned type (2) includes “Copy Control C” of Avex Co., Ltd.
D ". This "copy control CD" is a CD
In addition to the same area as a normal music CD that can be played by a player, it has a PC-only area that is forcibly used when playing back using a PC CD drive or the like. The PC-dedicated area stores an MP3 file obtained by converting music data to be recorded into the MP3 format and a reproduction program for reproducing the MP3 file, and is used for reproduction using a PC CD drive or the like. Is configured to read only this PC-dedicated area.

[0007]

A CD which has been subjected to the above type (1) of the copy protection measure may lose compatibility with a standardized format due to the insertion and rearrangement of the data. In this case, however, there is a problem that some CD players such as an old CD player and an in-vehicle type CD player cannot reproduce. CDs that have been subjected to the type (2) copy protection measures also have the same compatibility problem as described above. In addition, the "copy control CD"
Has the same compatibility problem as described above, and in addition to recording the same song data twice, the amount of data that can be recorded (therefore, the number of recorded songs) is almost halved. Problem of deterioration of sound quality due to the problem ".

[0008] Recently, a DVD (Digital Video Dis- play), which is a disk-shaped recording medium that has recently been widely spread.
Since c) is in a format in which copy protection measures have been taken in advance, using a DVD-R drive or the like of a PC,
Digital copying on DVD-R (write-once DVD) media is in principle impossible, so the possibility of illegal copying by ordinary PC users is low, but using a special copying tool makes digital copying entirely. Therefore, the same problem as in the case of a CD may occur depending on the illegal distribution status of such a copy tool.

SUMMARY OF THE INVENTION It is a first object of the present invention to provide a disk-shaped recording medium having a validity judging function which prevents illegal copying by adding a validity judging function without impairing compatibility. And A second object of the present invention is to provide a method of manufacturing a disk-shaped recording medium with a validity judging function that prevents illegal copying by adding a validity judging function without impairing compatibility. And

[0010]

According to a first aspect of the present invention, there is provided a disk which is arranged at an innermost circumference of a disk and on which disk management data including index data is recorded. A disk-shaped recording device comprising: a management area; and a data area arranged adjacent to the end of the disk management area and in which data such as music data is recorded using at least one of a plurality of divided recording units. In the medium, the disk management area stores, in addition to the index data, dummy index data indicating an address different from an address at which data such as song data is actually recorded, and a read error occurs. The program loader is recorded at the beginning of the specific track to be read,
The data area has a plurality of available recording units in which an unused area exists after the ECB code when data such as the music data is stored, and a specific usable recording unit of the plurality of available recording units is used. The first program is recorded in an unused area after the ECB code of the recording unit, and the index data piece obtained by dividing the regular index data into an unused area after the ECB code of the remaining available recording unit and the second program. Program fragments obtained by dividing the program are recorded in a distributed manner, and the program loader reads out the first program recorded in an unused area after the ECB code of the specific usable recording unit and reads out the first program. The first program is divided into an unused area after the ECB code of the remaining available recording unit. Second with the index data piece and program pieces recorded by reconstructing the second program which it reads on the basis of the program piece
The second program restores the regular index data based on the index data piece, and checks the validity of the disc-shaped recording medium according to the presence or absence of the restored regular index data. It is a program for determining.

The disc-shaped recording medium includes a music CD, a video CD, a data CD, a multimedia CD such as music data and image data, and a program such as a game.
Any one of the electronic book CD, the game software CD, the music DVD, the video DVD, the data DVD, the electronic book DVD, and the game software DVD prevents illegal copying, etc., of the rightful right holder of the disc-shaped recording medium. Good for protecting rights.

An address is assigned to the plurality of available recording units using random numbers, and one of the blocks divided into two blocks at a preset address is used for recording the index data piece. In addition, it is preferable to use the other for recording the program piece in order to simplify management of the plurality of available recording units.

Preferably, the number of divisions of the index data piece and the number of divisions of the program piece are determined using random numbers from among a predetermined number or more, in order to obtain desired security performance. .

According to a fifth aspect of the present invention, in order to achieve the second object,
According to a fifth aspect of the present invention, when manufacturing a disk-shaped recording medium with a validity judgment function, digital data to be recorded such as music data is shaped into a format for CD recording, and an area corresponding to a data area of the disk-shaped recording medium is formed. And storing the digital data generated in the data area corresponding area by the first step.
A second step of assigning an address using a random number to each of a plurality of available recording units in which an unused area exists after the CB code; and a plurality of available recording units assigned an address in the second step. In addition to excluding a specific address, an index data piece obtained by dividing regular index data into a plurality of pieces in an unused area after the ECB code of an available recording unit of a plurality of remaining addresses, based on the index data piece A third step of restoring the regular index data and storing a plurality of program fragments obtained by dividing the restoration judgment program for judging the validity of the disc-shaped recording medium in accordance with the presence or absence of the restored regular index data into a plurality of pieces; The index data piece and the unused area after the ECB code of the available recording unit of the specific address excluded in the third step are stored. A fourth step of reading the program pieces and restoring the restoration determination program based on the program pieces and activating the restoration determination program, storing a read-start program, and corresponding to a disk management area of the disk-shaped recording medium In the area,
A fifth step of storing dummy index data indicating an address different from an address at which data such as music data is actually recorded; and a head of a specific track read when a reproduction error occurs in the area corresponding to the disk management area. A sixth step of reading a read start program recorded in an area after the ECB code of an available recording unit at a specific address of the data area equivalent area and storing a program loader for starting the read start program; Recording of various data and programs stored in an area corresponding to the disk management area and an area corresponding to the data area of the recording medium on the disk-shaped recording medium in the stored state.
And the steps are sequentially performed.

The disk-shaped recording medium includes a music CD, a video CD, a data CD, a multimedia CD such as music data and image data, and a program such as a game.
Either an e-book CD, a game software CD, a music DVD, a video DVD, a data DVD, an e-book DVD, or a game software DVD is a legitimate manufacturer that manufactures and sells the disc-shaped recording medium while preventing illegal copying. It is preferable to protect the rights of the right holder.

In place of the third step, specific addresses of a plurality of available recording units to which addresses have been assigned in the second step are excluded, and the remaining plurality of addresses are set to a predetermined address as a boundary. An eighth step of dividing into two blocks by the
A ninth step of storing the plurality of divided index data pieces in an unused area after the ECB code of an available recording unit belonging to one of the two blocks, and two of the two divided by the eighth step. Executing the tenth step of storing each of the plurality of divided program pieces in an unused area after the ECB code of the available recording unit belonging to the other block of the block. It is preferable in simplifying the management of.

It is preferable that the number of divisions of the index data piece and the number of divisions of the program piece are respectively determined from a predetermined number or more using a random number in order to obtain desired security performance.

[0018]

According to the first aspect of the present invention, if the disc is a valid disc-shaped recording medium, the disc management area has a dummy index indicating an address different from an address at which data such as music data is actually recorded. Since the data is recorded and the program loader is recorded at the beginning of the specific track that is read when a playback error occurs, the program loader is read due to the occurrence of a playback error due to the playback operation, and the program loader reads the data area. The first data recorded in an unused area after the ECB code of a specific available recording unit among a plurality of available recording units in which an unused area exists after the ECB code when data such as music data is stored. The program is read and the first program is started, and by the first program,
An index data fragment obtained by dividing the regular index data and the second program, which is distributed and recorded in an unused area after the ECB code of the remaining available recording unit excluding the specific available recording unit, is divided. Each of the program pieces is read out, the second program is restored based on the program piece, and the second program is started, and the second program is used to generate regular index data based on the index data piece. Is restored, and the validity of the disc-shaped recording medium is determined according to the presence or absence of the restored regular index data, so that the music data and the like are normally reproduced. In this case, since the data and the program are recorded in an unused area after the ECB code of the available recording unit, which is an area which cannot be normally read in one recording unit, the data and the program are compatible when reproduced by a CD player. There is no loss of sex. On the other hand, a legitimate disk-shaped recording medium is inserted into a CD-R using a CD-R drive of a PC.
When a digital copy is made on an R medium or the like, the above-mentioned dummy index data and the program loader are copied onto the medium, but after the ECB code of the available recording unit, which is an area that cannot be normally read in one recording unit. Is not copied, and a series of validity determination operations associated with the chain of activation of the first and second programs as described above are not executed. Even if it is copied to the, it can not be played normally. Therefore, it is possible to provide a disk-shaped recording medium with a validity judgment function that prevents illegal copying by adding a validity judgment function without impairing compatibility.

In the fifth invention, a first step of shaping digital data to be recorded such as music data into a CD recording format and storing the digital data at a predetermined position in a data area corresponding area of a disk-shaped recording medium; A second step of assigning an address using a random number to each of a plurality of available recording units in which an unused area exists after the ECB code when storing the digital data, which is generated in the data area equivalent area by one step; And excluding specific addresses of the plurality of available recording units to which addresses have been assigned in the second step, and adding a regular address to an unused area after the ECB code of the available recording units of the remaining plurality of addresses. Index data pieces obtained by dividing the index data into a plurality of pieces, and regular index data based on the index data pieces. A third step of storing a program fragment obtained by dividing a restoration determination program for determining the validity of the disk-shaped recording medium according to the presence or absence of data into a plurality of pieces, and a specific address excluded by the third step Read out the index data pieces and the program pieces in an unused area after the ECB code of the available recording unit, restore the restoration determination program based on the program pieces, and start the restoration determination program. A fourth step of storing a boot program; and a fifth step of storing dummy index data indicating an address different from an address where data such as music data is actually recorded in an area corresponding to a disk management area of the disk-shaped recording medium. A specific process to be read when a reproduction error occurs in the area corresponding to the disk management area. At the beginning of the click,
A sixth step of reading a read start program recorded in an area after the ECB code of an available recording unit at a specific address of the data area equivalent area and storing a program loader for starting the read start program; The seventh step of sequentially recording various data and programs stored in the disk management area equivalent area and the data area equivalent area of the recording medium on the disk-shaped recording medium in the storage state is sequentially executed, without compromising compatibility. The method of manufacturing a disc-shaped recording medium with a validity judging function according to the first aspect of the present invention, wherein an illegal copy or the like is prevented by adding a validity judging function can be provided.

[0020]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram exemplifying a format of a disc-shaped recording medium with a validity judgment function according to a first embodiment of the present invention. The disk-shaped recording medium with the validity determination function of the present embodiment is configured as, for example, a music CD, and the following changes are made to the conventional music CD without the validity determination function shown in FIG. Things.
The format of the disc-shaped recording medium shown in FIG. 1 shows a case where the format is a music CD on which music data is recorded. However, a multimedia CD such as image data, a video CD on which a program such as a game is recorded, or a data CD CD,
The same configuration applies when the present invention is applied to various CDs such as an electronic book CD and a game software CD. Although there are differences in recording units and the like, a similar configuration is obtained when the present invention is applied to various DVDs such as a music DVD, a video DVD, a data DVD, an electronic book DVD, and a game software DVD.

That is, the disc-shaped recording medium having the validity judgment function configured as the music CD of the present embodiment has the respective pieces of recorded music in the portion following the lead-in of the disc management area 1 like the normal music CD. , Index data (index 1, index 2,...), And dummy index data 4 indicating an address different from the address where data such as music data is actually recorded. Is stored. This dummy index data 4
Is stored in the (n + 1) -th recording unit, where n is the number of songs recorded, and is configured to indicate an address corresponding to lead-out 3. A program loader (PL) 5 is stored at the head of the track 1a which is read when an error occurs in the disk management area 1 when nothing is stored in the normal music CD.
The program loader 5 is a program for reading a first program (PR1) 7 described later and activating the first program.

Data area 2 of a disk-shaped recording medium with a validity judgment function configured as a music CD of the present embodiment
Indicates a plurality of available recording units 6 (6) in which an unused area exists after the ECB code when data such as music data is stored.
-1, 6-2,...). Since such available recording units 6 compose music data for one second by using 75 recording units, at least 4200 available recording units 6 are used when recording music data for 70 minutes. Is generated, and more than 10,000 available recording units 6 are actually generated.

Therefore, in the present embodiment, addresses are assigned to the plurality of available recording units 6 using random numbers. As a result, the addresses (6-1, 6-2,..., 6-100,...) Specific to the usable recording unit, which are independent of the actual address arrangement order in the data area 2.
., 6-10000, 6-100001,...) Are assigned to each available recording unit. Then, all available recording units are divided into two blocks with a predetermined address as a boundary (for example, by setting the predetermined address to 10000, an address less than 10000 and an address 10000).
The unused area after the ECB code of the usable recording unit of the first half block is used for storing an index data piece described later, and the unused area after the ECB code of the usable recording unit of the second half block is divided. Are used for storing index data pieces described later. further,
An available recording unit of a specific address (for example, address 100) is selected, and the first program 7 is stored in an unused area after the ECB code. In addition,
The reason why the entire available recording unit is divided into two blocks as described above is to simplify management of a plurality of available recording units, but without dividing the entire available recording unit into two blocks, You may use it as it is. Also, the number of divisions of the index data piece and the number of divisions of the program piece are respectively determined using random numbers from among a predetermined number or more. However, as the number of divisions increases, the security performance increases. Shall be determined according to the security performance of

In this embodiment, in order to realize the validity judging function, the index data pieces I1, I2,.
R2) Program pieces P1, P2,.
However, in order to simplify the description, five available recording units 6-1, 6-2, 6-100, 6-
Only the index data pieces I1 and I2, the first program (PR1) 7, and the program pieces P1 and P2 stored in the unused areas after the ECB codes 10000, 6 to 10001, respectively are described.

In the above, the first program (PR
1) 7 is the available recording unit 6-6 as described above.
1,6-2, ..., 6-10000,6-10001
Read out the index data pieces I1, I2,... And the program pieces P1, P2,... Recorded in an unused area after the ECB code of.
, P2,... Is a read-out activation program for restoring the second program 8 and activating the second program 8. The second program 8 is based on the index data pieces I1, I2,. Is a restoration determination program for restoring the index data and determining the validity of the disc-shaped recording medium according to the presence or absence of the restored regular index data.

Next, a method for manufacturing a disk-shaped recording medium with a validity judgment function according to the first embodiment will be described with reference to the flowchart shown in FIG. When manufacturing the disc-shaped recording medium with the validity determination function of the present embodiment, a personal computer (PC) and a CD-R drive built in or external to the personal computer (PC) are used.

First, in step S1 of FIG. 2, digital data to be recorded, such as music data, on a storage device (eg, a RAM) of a PC is shaped into a format for CD recording.
The data is stored at a predetermined position in an area corresponding to the data area of the CD secured in the storage device. With the storage of this song data, EC
A recording unit having no unused area after the B code and a recording unit having an unused area (that is, an available recording unit) are generated and arranged, for example, as shown in FIG. Next step S
In 2, a random number is used to assign an address to each of a plurality of available recording units generated in the data area. As a result, an address as shown in FIG. 1 is assigned to each available recording unit.

In the next step S3, specific addresses (6-100 in the illustrated example) of the plurality of usable recording units to which addresses have been assigned are excluded, and the remaining plural addresses are set to predetermined addresses. (In the example shown,
(6-10000) as a boundary and two blocks (6-1).
First half block containing ~ 6-9999 and 6-1000
(The latter block including 0 or later). In the next step S4, the available recording units 6-
The index data pieces I1, I2,... Are respectively stored in unused areas after the ECB code of 1, 6, 2,..., And in the next step S5, available recording units 6-10,000, 6 belonging to the latter half block. The program pieces P1, P2,... Are respectively stored in unused areas after the ECB code of −10001,..., And in the next step S6, the available recording unit 6-100 of the specific address above the ECB code after the ECB code The first program (PR1) 7 is stored in an unused area. As a result, in the area corresponding to the data area of the CD secured in the storage device, the index data pieces I1, I2,..., The program pieces P1, P2,. Will be stored.

In the next step S7, index data (index 1, index 2,...) Indicating an address at which data such as music data is actually recorded in an area corresponding to the disk management area of the CD secured in the storage device. ..) together with the dummy index data 4 indicating an address (in this embodiment, the address of the lead-out 3) different from the address at which data such as music data is actually recorded. As a result, the dummy index data 4 is stored at the end of the music data actually recorded. In the next step S8, the ECB code of the available recording unit 6-100 of one specific address of the data area corresponding area is added to the head of the specific track 1a read when a reproduction error occurs in the area corresponding to the disk management area of the CD. The first program (PR1) 7 recorded in the subsequent area is read and a program loader (PL) 5 for starting the program is stored. As described above, in each area secured in the storage device, C
All of various data and programs necessary for manufacturing D are stored.

In the next step S9, various data and programs stored in the area corresponding to the disk management area and the area corresponding to the data area of the CD are recorded on the blank CD in the storage state. Thus, the CD with the validity determination function shown in FIG. 1 is manufactured. The CD with the validity determination function includes index data pieces I1, I2,... And program pieces P1, P2 recorded in the unused area.
2, ... are not visible from the operating system (OS), etc., so the CD-DA definition standard "Red Boo
k ", and compatibility with a normal music CD or the like is ensured. Note that when performing the recording in step S9, the data and the like are recorded in the recording area between the STF code and the EOF code of one recording unit, and the data is recorded in the unused area after the ECB code of the same recording unit. It is assumed that a special “burning program for CD or the like” capable of recording a “recording unit having a special structure in which the information is recorded” is used.

Next, the operation at the time of reproducing the disk-shaped recording medium with the validity judgment function of the present embodiment will be described with reference to the flowchart shown in FIG. When reproducing the disk-shaped recording medium with the validity determination function of the present embodiment,
There are a case where a CD drive or the like of a personal computer (PC) is used and a case where a CD player is used.
Since the storage location of the D playback (performance) program is different (in the case of a PC, it is a media player attached to an operation system stored in a hard disk, and in the case of a CD player, it is a playback program stored in a ROM). The case where a CD drive or the like of a PC is used will be described as an example.

First, in step S11 of FIG. 3, index data (index 1, index 2,...) Recorded in the disc management area 1 of the CD is recorded by a CD reproducing program started when a CD is inserted into a CD drive or the like.・ ・) Is read. The index 1, index 2,... Are sequentially read by reading the index data. However, since the disc-shaped recording medium with the validity determination function of the present embodiment is a valid CD, In addition, since the dummy index data 4 indicating the address of the lead-out 3 which is an address different from the address where data such as music data is actually recorded is recorded, a reproduction error occurs in the next step S12. . Due to the occurrence of the reproduction error, in the next step S13, the track 1a, which is a specific track read when the reproduction error occurs, is read, and the program loader (PL) 5 recorded at the head of the track 1a is read. Is activated.

When the program loader (PL) 5 is started, in the next step S14, the first program (in the unused area after the ECB code of the specific available recording unit 6-100 in the data area 2) is recorded. PR1) 7 is read and activated. This first program (PR
1) With the activation of 7, in the next step S15, the available recording units 6-1, 6-2, 6-100 of the data area 2
., Index data pieces I1, I2 dispersedly recorded in unused areas after the ECB code of 00, 6-100001,...
.. And the program pieces P1, P2,.
Is restored and the second program 8 is started.

When the second program (PR2) 8 is started, in the next step S16, the index data pieces I1,
Normal index data is restored (reconstructed) based on I2, ...
The legitimacy of the disk-shaped recording medium is determined according to the presence or absence of the restored regular index data. Here, in the case of the disc-shaped recording medium with the validity determination function of the present embodiment, the disc-shaped recording medium is determined to be a legitimate CD because the index data exists. The process proceeds to step S17 and subsequent steps. However, if the disc-shaped recording medium with the validity determination function of the present embodiment is a copy, since there is no regular index data, the disc-shaped recording medium is determined to be an unauthorized CD. Will be determined. In that case, the process proceeds to step S18, and the reproduction operation is stopped.

In step S17, the number of recorded songs is determined based on a comparison between the regular index data and the corresponding song data. In the next step S19, the performance time of each recorded tune is determined based on a comparison between the regular index data and the corresponding tune data. Then, in the next step S20, the recorded tunes are successively reproduced (played) sequentially from the beginning. This allows each song to be played back normally (played)
Will be done. Note that the disc-shaped recording medium with the validity determination function of the present embodiment stores the data and the program in an unused area after the ECB code of the available recording unit, which is an area that cannot be normally read in one recording unit. Since recording is performed, compatibility is not impaired even when the data is reproduced by a CD player.

Next, the operation at the time of reproducing a disc-shaped recording medium different from the disc-shaped recording medium with the validity judgment function of the present embodiment will be described with reference to the flowchart shown in FIG. First, when reproducing a disk-shaped recording medium such as a normal music CD without the validity determination function as in the present embodiment, regular index data (index 1, index 2) is stored in the disc management area 1. ,...) Are recorded, no reproduction error occurs due to the execution of step S12 in FIG. Therefore, after the execution of step S11, the process immediately proceeds to step S17. After that, the above steps S17-S19-S20 are executed, so that the respective songs are normally reproduced (performed) sequentially.

On the other hand, a disk-shaped recording medium having a validity judging function according to the present embodiment configured as a music CD is
The “illegal copy music CD” digitally copied on a CD-R medium using a DR drive or the like is completely different from the various data and programs of the CD shown in FIG. Are stored in the disk management area 1, regular index data (index 1, index 2,...), Dummy index data 4 added to the end thereof, and the program recorded on the track 1a. The loader (PL) 5 is recorded, and the available recording unit 6 formed in the data area 2 is “STF of one recording unit”.
The recording unit has a special structure in which data and the like are recorded in a recording area between the code and the EOF code, and data and the like are recorded in an unused area after the ECB code in the same recording unit. Data pieces I1, I2,... And program pieces P1, P2,
Are invisible from the operation system (OS) or the like. Therefore, the index data pieces I1, I2,... And the program pieces P1, P2,... Recorded in the unused area cannot be recorded by a CD copy using a "normal CD or other burning program". The "illegally copied music CD" includes the index data pieces I1, I2, and the program pieces P1, P2,... Required to realize the validity determination function of the present embodiment.
Is not possessed.

When such an "illegal copy CD" is reproduced, the dummy index data 4 recorded in the disk management area 1 is read out by executing step S11 in FIG. Occurs. Due to the occurrence of this reproduction error, step S13
Is executed to start the program loader (PL) 7. By the activation of the program loader (PL) 7, the step S14 is executed and the first program (PR1) 7 recorded in the unused area after the 6-100 ECB code of the data area 2 is read and activated. But the first
Of the index data pieces I1, I2,... And the program pieces P1,
Since P2,... Are not recorded, the index data fragment I
, I2,... Can also be read from the program piece P1,
Read P2,... And read the second program (PR2) 8
Can not be restored. Accordingly, since a series of validity determination operations associated with the chain of activation of the first and second programs as in the case of the music CD with the validity determination function of the present embodiment are not executed, the “invalid CD "Is present", and the step S
At 18, the reproducing operation is stopped (actually, the operation of reading the lead-out 3 specified by the dummy index data 4 is repeated, so that the disk keeps spinning).

According to this embodiment, when an illegally copied music CD is created by digitally copying an entire disc-shaped recording medium with a validity judgment function onto a CD-R medium using a CD-R drive of a PC or the like, Even if data is copied to the medium, it cannot be played back normally, so the legitimacy judgment was made to prevent illegal copying by adding a legitimacy judgment function without compromising compatibility. A disk-shaped recording medium with a function can be provided, whereby illegal copying and the like can be prevented, and the right of a rightful right holder of the disk-shaped recording medium can be protected.

Further, according to the present embodiment, by using the above-mentioned manufacturing method, an illegal copy can be prevented by adding a validity judgment function without impairing compatibility. A method of manufacturing a disk-shaped recording medium with a function can be provided, whereby illegal copying and the like can be prevented, and the right of a rightful right to manufacture and sell the disk-shaped recording medium can be protected.

In the first embodiment, the usable recording unit 6 is provided on the disc in the data area 2 of the disc-shaped recording medium. However, the usable recording unit 6 is provided only on the disc management area 1. And, in addition,
The usable recording unit 6 may be provided in both the disk management area 1 and the data area 2.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a format of a disc-shaped recording medium with a validity determination function according to a first embodiment of the present invention.

FIG. 2 is a flowchart illustrating a method of manufacturing a disk-shaped recording medium with a validity determination function according to the first embodiment.

FIG. 3 is a flowchart showing an operation at the time of reproducing a disc-shaped recording medium with a validity judgment function according to the first embodiment;

FIG. 4 is a diagram showing a format of a conventional disk-shaped recording medium configured as a music CD.

FIG. 5 is a diagram for explaining a configuration of a recording unit of a data area of a conventional disk-shaped recording medium configured as a music CD.

[Explanation of symbols]

1 Disk management area 1a Specific track 2 Data area 3 Lead-out 4 Dummy index data 5 Program loader (PL) 6 (6-1, 6-2, ..., 6-10000, ...)
Available recording unit 7 First program (PR1) 8 Second program (PR2) I1, I2,... Index data pieces P1, P2,.

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Norikatsu Ozawa             1-273 Amanuma-cho, Saitama City, Saitama Prefecture F term (reference) 5D044 AB02 AB05 AB07 BC02 CC04                       DE03 DE38 DE49 DE53 GK12                       HL08                 5D090 AA01 BB02 CC14 DD03 DD05                       FF08 FF09 GG17

Claims (8)

[Claims] 1. A disk management area which is arranged at the innermost circumference of a disk and in which disk management data including index data is recorded, and which is arranged adjacent to an end of the disk management area and is divided into a plurality of recording areas. A data area in which data such as music data is recorded using at least one of the units, wherein the disk management area actually stores data such as music data in addition to the index data. In addition to the dummy index data indicating an address different from the address at which the track is recorded, a program loader is recorded at the beginning of a specific track that is read when a reproduction error occurs. Has a plurality of available recording units in which an unused area exists after the ECB code when the data is stored. The first program is recorded in an unused area after the ECB code of the specific usable recording unit of the usable recording unit, and the regular index data is divided into an unused area after the ECB code of the remaining usable recording unit. The divided index data pieces and the program pieces obtained by dividing the second program are separately recorded, and the program loader stores the first available information recorded in the unused area after the ECB code of the specific available recording unit. Is a program that reads out the above program and starts the first program. The first program includes an index data piece dispersedly recorded in an unused area after the ECB code of the remaining available recording unit, and Reading each of the program pieces, restoring the second program based on the program pieces, and A second program that restores regular index data based on the index data piece and determines the validity of the disc-shaped recording medium according to the presence or absence of the restored regular index data. A disc-shaped recording medium with a validity judgment function, characterized in that the program is a program to be executed. 2. The disk-shaped recording medium includes a music CD, a video CD, and a data CD in which multimedia data such as music data and image data and a program such as a game are recorded.
2. The disk-shaped recording medium according to claim 1, wherein the recording medium is any one of D, an electronic book CD, a game software CD, a music DVD, a video DVD, a data DVD, an electronic book DVD, and a game software DVD. . 3. An address is assigned to the plurality of available recording units using random numbers, and one of the blocks when divided into two blocks with a preset address as a boundary is used for recording the index data piece. 3. A disk-shaped recording medium with a validity judging function according to claim 1, wherein the recording medium is used for recording the program piece. 4. The method according to claim 1, wherein the number of divisions of the index data piece and the number of divisions of the program piece are each determined using a random number from among a predetermined number or more. A disc-shaped recording medium with a validity judgment function according to any one of the preceding claims. 5. When manufacturing a disc-shaped recording medium having a validity judgment function, digital data to be recorded such as music data is formatted into a format for recording on a CD, and a predetermined position of an area corresponding to a data area of the disc-shaped recording medium is set. A random number for each of a plurality of available recording units generated in the data area equivalent area by the first step and having an unused area after the ECB code when storing the digital data. A second step of assigning an address using the method, and excluding a specific address of a plurality of available recording units to which an address has been assigned in the second step, and an ECB of an available recording unit of the remaining plurality of addresses. In an unused area after the code, an index data piece obtained by dividing the regular index data into a plurality of pieces, and a regular index data based on the index data piece. A third step of restoring the data and storing a program fragment obtained by dividing a restoration determination program for determining the validity of the disc-shaped recording medium into a plurality of pieces in accordance with the presence or absence of the restored regular index data, The index data pieces and the program pieces are read out into an unused area after the ECB code of the available recording unit of the specific address excluded in the third step, and the restoration determination program is restored based on the program pieces. And a fourth step of storing the read-out activation program, which activates the restoration determination program, and an address different from an address at which data such as music data is actually recorded in an area corresponding to a disk management area of the disk-shaped recording medium. A fifth step of storing dummy index data indicating the disk management area, At the beginning of a specific track read when a raw error occurs, a read start program recorded in an area after the ECB code of an available recording unit at a specific address of the specific area of the data area is read, and the read start program is started. A sixth step of storing a program loader, and a seventh step of recording various data and programs stored in a disk management area equivalent area and a data area equivalent area of the disk-shaped recording medium on the disk-shaped recording medium in the storage state. Are sequentially performed, the method for manufacturing a disk-shaped recording medium with a validity judgment function. 6. The disc-shaped recording medium includes a music CD, a video CD, and a data CD on which multimedia data such as music data and image data and a program such as a game are recorded.
7. The disc-shaped recording medium according to claim 6, wherein the disc-shaped recording medium is any one of D, electronic book CD, game software CD, music DVD, video DVD, data DVD, electronic book DVD, and game software DVD. Manufacturing method. 7. In place of the third step, specific addresses of a plurality of available recording units to which addresses have been assigned in the second step are excluded, and a plurality of remaining addresses are replaced with preset addresses. An eighth step of dividing the block into two blocks at the boundary, and dividing the plurality of blocks into an unused area after the ECB code of an available recording unit belonging to one of the two blocks divided by the eighth step A ninth step of storing the respective pieces of index data,
And a tenth step of storing the plurality of divided program pieces in an unused area after the ECB code of the available recording unit belonging to the other of the two blocks divided in the eighth step. 7. The method according to claim 5, wherein the disk-shaped recording medium with the validity determination function is provided. 8. The method according to claim 5, wherein the number of divisions of the index data piece and the number of divisions of the program piece are respectively determined from random numbers from among a predetermined number or more.
8. The method for manufacturing a disk-shaped recording medium with a validity judgment function according to any one of claims 1 to 7.