JPH10106147A - Recording method of copyright management information of disk, writing method and disk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the processing of a copy protecting key by scrambling and recording an SID code and an ISRC code of a disk and using this record for the protecting key. SOLUTION: An analog audio signal and a bit of copyright information are impressed upon input terminals IN1 and IN2 respectively. The audio signal is subjected to signal processing of emphasis, equalizing, noise gate and effect processing, etc., via an A/D converter 1 by a signal processing circuit 2 and a memory 3, and is then impressed upon a DVD encoding circuit 4. Then, the copyright information is encoded and scramble-processed by a copyright encoding circuit 5, and is then impressed upon the circuit 4. By this circuit 4, the copyright information is packed in a read-in part and a CMI area, while an audio data in a program source data part. Subsequently, an output of the circuit 4 is EFM-modulated by a modulation circuit 6, and is outputted via an output terminal OUT. Then, based on this, further DVD-audio manufacturing is performed by a master.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a DVD (digital video disk or digital versatile disk),
Discs such as CDs and CD-ROMs (optical discs,
Copyright management information recording method (including magneto-optical disks),
The present invention relates to a writing method and a disc.

[0002]

2. Description of the Related Art In general, high-quality video, audio, and data can be recorded on a DVD.
It is necessary to protect the copyright of data from illegal copies (so-called pirated boards). CD-Rs (Compact Disc Recordable) include enhanced CDs and CD-ROs.
Since high quality images, data and audio from M can be duplicated and recorded, it is necessary to protect the copyright of the images, data and audio from illegal copies. As a copyright protection method, the copyright management information is scrambled in advance and recorded on a disc, and a part of the copyright management information is used as a copy protection key. Playing,
If the digital output is performed and the data cannot be read normally, the disk may be illegally copied and the reproduction may not be performed, or the reproduction may be performed but the digital output is not performed.

[0003]

When a copy protection key is recorded on a disk, it is desirable that the key be difficult to read. However, if the copy protection key is complicated, there is a problem that the process of confirming the validity at the time of reading is complicated.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, an object of the present invention is to provide a recording method and a recording method of a copyright management information of a disk which can easily process a copy protection key, and a disk.

[0005]

In order to achieve the above object, the present invention scrambles an SID code indicating the creator of the disk as copyright management information and an ISRC code indicating a program source recorded on the disk. The data is recorded as a copy protection key. That is, according to the present invention, a step of scrambling an SID code indicating a creator as copyright management information of a disc and a step of recording the scrambled SID code in a control data section of a lead-in section of the disc are included. , A method of recording copyright management information of a disk having the same.

Further, according to the present invention, a step of scrambling an SID code indicating a creator as copyright management information of a disc and an ISRC code indicating a program source recorded on the disc, the step of scrambling the scrambled SID code And recording the ISRC code in the control data section of the lead-in section of the disc.

Further, according to the present invention, a step of scrambling an SID code indicating a creator as copyright management information of the disk, the step of scrambling the scrambled SID
Recording the code in the copyright management information area of the disk.

Further, according to the present invention, a step of scrambling an SID code indicating a creator as copyright management information of a disc and an ISRC code indicating a program source recorded on the disc, the scrambled SID code Recording the ISRC code in the copyright management information area of the disk.

Further, according to the present invention, a step of scrambling an SID code indicating a creator as copyright management information of a disk, the step of scrambling the scrambled SID
Writing the code on the disk by laser cutting, the method for writing copyright management information on the disk.

According to the present invention, a step of scrambling an SID code indicating a creator of the disc as copyright management information of the disc, an ISRC code indicating a program source recorded on the disc, and the scrambled SID code And writing the ISRC code to the disc by laser cutting.

According to the present invention, there is provided a disk in which an SID code indicating a creator is scrambled as copyright management information of the disk, and the scrambled SID code is recorded in a control data section of a lead-in section. Is done.

According to the present invention, the SID code indicating the creator and the ISRC code indicating the program source recorded on the disk are scrambled as copyright management information of the disk, and the scrambled SID is
A disc is provided in which a code and an ISRC code are recorded in a control data section of a lead-in section.

According to the present invention, there is provided a disk in which an SID code indicating a creator is scrambled as copyright management information of the disk, and the scrambled SID code is recorded in a copyright management information area. .

According to the present invention, the SID code indicating the creator and the ISRC code indicating the program source recorded on the disk are scrambled as the copyright management information of the disk.
A disc is provided in which a code and an ISRC code are recorded in a copyright management information area.

Further, according to the present invention, there is provided a disk in which an SID code indicating a creator is scrambled as copyright management information of the disk, and the scrambled SID code is written by laser cutting.

According to the present invention, the SID code indicating the creator and the ISRC code indicating the program source recorded on the disk are scrambled as the copyright management information of the disk.
A disc is provided on which a code and an ISRC code are written by laser cutting.

Further, according to the present invention, a step of scrambling an SID code indicating a creator as copyright management information of the disk, the step of scrambling the scrambled SID
Recording the code in the TOC of the disk.

Further, according to the present invention, a step of scrambling an SID code indicating a creator as copyright management information of the disc and an ISRC code indicating a program source recorded on the disc, wherein the scrambled SID code And ISRC code on disk TO
Recording the copyright management information on the disk having the step of recording the copyright management information on the disc.

Further, according to the present invention, there is provided a disk in which the SID code indicating the creator is scrambled as the copyright management information of the disk, and the scrambled SID code is recorded in the TOC of the disk.

According to the present invention, the SID code indicating the creator and the ISRC code indicating the program source recorded on the disk are scrambled as the copyright management information of the disk.
A disc is provided in which the code and the ISRC code are recorded in the TOC of the disc.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing a format for realizing one embodiment of a method for recording and writing copyright management information on a disk according to the present invention, and FIG.
FIG. 3 is an explanatory diagram showing details of the copyright management information of FIG. 1.

FIG. 1 shows a recording format of a lead-in portion of a DVD-audio (DVD standardized for audio only) as an example of a disk. The area of the disc is roughly PCA from the inner circumference to the outer circumference.
(Post cutting area), lead-in,
It is composed of a data section and a lead-out section, and one sector is composed of 2048 bytes. The control area of the lead-in section is composed of 16 sectors “1” to “16”, physical format information is recorded in sector “1”, disc manufacturing information is recorded in sector “2”, and sector “3” is recorded. In "4", copyright information as shown in detail in FIG. 2 is recorded.

In the first byte of the sectors "3" and "4", a 4-bit copy prohibition code is recorded. Copy prohibition code "1000" is "copy prohibition", "1100"
Represents “copy permitted” and “1010” represents “copy permitted once” (others are reserved). The 2nd to 18th bytes indicate ISRC (International Standard Recording Code) indicating the music (program source)
Code) An area of a code and an SID (source ID) code indicating a disc maker. In the second byte, a synchronizing signal for scrambling the 8-bit ISRC code and the SID code is recorded.
A 0-bit ISRC code is scrambled and recorded, and an SID code for eight characters is scrambled and recorded in the 11th to 18th bytes and thereafter.

Similarly, an ISRC code and a SID code for one title are recorded in 16 bytes, and a total of 9
Nine titles are recorded. In addition, instead of scrambling both the ISRC code and the SID code,
Only the code may be scrambled. Note that “IF” shown as an example of the SID code in FIG.
"PI ・ L231 ~ 7" is an international record and video producer's (IFPI) International Federation of Ph.D.
onogram Industries, now known as International Federation
of Phonogram and Video Industries) and "L2
Reference numerals 31 to 7 indicate IFPI mastering codes of Victor Company of Japan, Limited. The ISRC code is 12
The first to fifth characters are 6 bits each,
The twelfth character is composed of 4 bits (6 bits are blank).

Next, a second embodiment will be described with reference to FIG. In the second embodiment, a variable length copyright management information (CMI) area of 16 bytes (128 bits) to 188 bytes (1504 bits) is provided not in the sector but in the lead-in portion of the disk. In the CMI area, for example, 64-bit disc manufacturing date data, 52-bit factory code, 8-bit scrambling synchronization signal, 60-bit ISRC code, 8-byte SID code, and copy permission 4-bit CGMCAPS (Copy Generation Manageme
Control Audio Protection System) code is recorded. This data is repeatedly recorded several times, and
The SRC code and the SID code are scrambled and recorded. Further, in the CMI area, the control data area of the lead-in section is manufactured and recorded in advance as a RAM area.

Next, a third embodiment will be described with reference to FIG. In the third embodiment, as in the second embodiment, 16 bytes (12 bytes) are stored in the lead-in portion of the disk.
A variable length CMI area of 8 bits) to 188 bytes (1504 bits) is provided, and a dummy disk manufacturing date is arranged after the SID code in order to scramble the 8 byte SID code in this CMI area. Or only the SID code is scrambled and recorded. The CMI area is also manufactured and recorded as a RAM area in advance. Here, the method of scrambling the control data may be the same as the method of scrambling the program source recorded in the data portion of the disc, or may be another method.

FIG. 5 shows an encoder for producing DVD-Audio as an example of a disk, and has an input terminal IN.
An analog audio signal (program source) and copyright information are applied to IN1 and IN2, respectively. An analog audio signal is converted into a digital signal by an A / D converter 1, and the data is subjected to signal processing such as emphasis, equalizing, noise gate, and effect processing by a signal processing circuit 2 and a memory 3, followed by DVD encoding. Applied to circuit 4.

The copyright information is encoded and scrambled by a copyright encoding circuit 5 and applied to a DVD encoding circuit 4. In the DVD encoding circuit 4, the copyright information is packed in the lead-in section or the CMI area, and the audio data is packed in the program source data section. Next, the output signal of the DVD encoding circuit 4 is EFM-modulated by the modulation circuit 6 and output via the output terminal OUT.
Then, a master is manufactured based on the output signal of the output terminal OUT, and a DVD-Audio is manufactured based on the master.

The disk 11 manufactured as described above is shown in FIG.
Is reproduced by a reproducing apparatus as shown in FIG. FIG. 7 shows the reproduction process. When the disk 11 is set on the tray 21 having the disk drive unit 12 and the lid 22 is closed (or closed by the user) and a reproduction instruction is input (step S1), the disk 11 is driven by the disk drive unit 12 to read. The control data of the IN part is read first (step S2), and then the program source data is read. The read data is subjected to EFM demodulation by the demodulation circuit 13 and then applied to the DVD decoding circuit 14. In the DVD decoding circuit 14, first, the data packed by the DVD encoding circuit 4 of the encoder shown in FIG. 5 is unpacked by the format decoding unit 14A, and then encoded by the copyright encoding circuit 5 of the encoder shown in FIG. , The control data of the scrambled lead-in section is transferred to the descramble section 14B
Is descrambled by

The SID code in the control data is sent to the reference data supply unit 1 by the key collation circuit 18.
9 against the SID code. The reference data supply 19 generates all IFPI mastering codes of the International Federation of Record and Video Producers,
It is determined whether or not the disk 11 has a valid SID code recorded, that is, whether or not the disk 11 is a "pirate board" (step S4).

In step S4, if the SID code is valid, if the disc has a copy prohibition code recorded in the control data as shown in FIG. 2, it is determined whether or not "copy prohibition" is performed ( Step S
5) If the copy is not prohibited, the program source is set to D.
Reproduction is carried out by outputting via the / A converter 15 and the output terminal 16 (step S6). In the case of a disc on which a CGMCAPS code indicating the number of times of copying is recorded as shown in FIG. 3, it is determined whether or not the number of times of copying is the maximum value. Is incremented.

On the other hand, in step S4, the SID
If the code is not proper, the drive of the disk drive unit 12 is stopped, and then the disk 11 is rejected by operating the reject mechanism 20 such as a solenoid to open the lid 22 (step S7). Next, if "copy prohibited" (or the number of times of copying is the maximum value) is determined in step S5, "reproduction impossible" is displayed (step S8).

FIG. 8 shows another reproducing apparatus, and FIG. 9 shows the processing. When a reproduction instruction is input (step S1
1) The disk 11 is driven by the disk drive unit 12, and the control data of the lead-in unit is read first (step S12), and then the program source data is read. This read data is subjected to EF by the demodulation circuit 13.
After M demodulation, it is applied to the DVD decoding circuit 14 and the format decoding unit 17A. The control data is unpacked by the format decoding unit 17A and then descrambled by the descrambling unit 17B.

The SID code in the control data is converted by the key collation circuit 18 into the reference data supply unit 1.
9 (steps S13 and S13).
14) If the SID code is legitimate, it is determined whether the copy prohibition code (or CGMCAPS code) in the control data is “copy prohibition” (step S1).
5) If the program source is not “copy prohibited”, the program source is D
Reproduction is performed via the VD decoding circuit 14, the D / A converter 15, and the output terminal 16 (step S16).

On the other hand, in step S14, SI
If the D code is not normal, the drive of the disc drive unit 12 is stopped after playing for one second in order to inform the user that the playback device or the disc 11 is not "bad", and then, in step S15, In the case of "copy prohibition", a message "reproduction impossible" is displayed (step S18).

Next, another recording method of the SID code will be described with reference to FIGS. In the above embodiment, the SI
Although the D code and the like are recorded in the RAM area of the disk, in this embodiment, as shown in FIG. 10, the data is written by laser cutting into a PCA (post cutting area) provided on the inner peripheral side from the lead-in portion. .
The signal in this case is RZ (Return t) as shown in FIG.
o), which is modulated by a PE (Phase Encoding) signal having a different phase according to the bits “1” and “0”, and recorded as pit data (barcode).

This writing can be realized by a laser cutting process of about several seconds using the laser cutting unit 7 as shown in FIG. 12 after stamping (forming process) of the disk 11, so that the productivity of the disk 11 is improved. It does not get worse. The writing method will be described with reference to FIGS. 12 and 13. First, when the above-described copyright information is input to the copyright encoding circuit 5 (step S10).
21) The copyright information is scrambled by the copyright encoding circuit 5 (step S22), formatted into a predetermined format (step S23), and then converted into a PE-RZ signal (step S24). Next, the laser beam is PE-
The data is modulated by the RZ signal and written to the PCA of the disk 11 (step S25).

When reproducing the disc 11 on which the copyright information including the SID code is written in the PCA, the reproduction apparatus shown in FIGS.
The A data is read, and reproduction permission, rejection, and the like are performed by the processing shown in FIGS. In the PCA, which is a copyright management information area written by laser cutting, since data is recorded in a barcode form,
It may also be called BCA (Barcode Cutting Area).

Although the above embodiments have been described with reference to a case where the present invention is applied to a DVD, the present invention can be applied to a disk of another standard such as a CD-ROM. In that case, the above embodiment can be appropriately modified and applied by replacing the DVD encoding circuit with a CD-ROM encoding circuit and replacing the DVD decoding circuit with a CD-ROM decoding circuit. Further, the present invention can be applied to a CD or an enhanced CD. FIG. 14 shows an encoder of an enhanced CD to which the present invention is applied, and FIGS. 15 and 16 show two examples of an enhanced CD reproducing apparatus. FIG.
5 and 16 are shown in the flowcharts of FIGS. 17 and 18, respectively. FIG.
Sets the DVD encoding circuit 4 in FIG.
Enhanced CD encoding circuit 4 for performing D-ROM encoding
A. FIGS. 15 and 16 show the DVD decoding circuit 14 of FIGS. 7 and 8 replaced with an enhanced CD decoding circuit 14C, respectively. Due to this change, data supplied from the enhanced CD decoding circuit 14C to a computer (not shown) is obtained. The output and the audio signal output from the terminal 16 via the D / A converter 15 are output.

In the flowcharts of FIGS. 17 and 18, the process of reading the control data in steps S2 and S12 of FIGS. 7 and 9 is changed to the process of reading the TOC (steps S2A and S12A).
Also, the determination of whether to prohibit copying in steps S5 and S15 in FIGS. 7 and 9 has been deleted. Step S2A in FIG.
Then, TOC (Table Of Contents) is read. In this case, it is assumed that copyright information as shown in FIG. 4 is recorded in addition to the normal TOC. Others are the same. In step S12A of FIG. 18, TOC is similarly read. Also in this case, it is assumed that copyright information as shown in FIG. 4 is recorded in addition to the normal TOC. Others are the same. However, since the copy prohibition code is not recorded, if the key is valid in steps S4 and S14, reproduction is started (steps S6 and S16). The data output is supplied to a computer (not shown) and used to reproduce an image or the like.

[0041]

As described above, according to the present invention, the SID indicating the creator is used as the copyright management information of the disk.
Since the code and the ISRC code indicating the program source recorded on the disc are scrambled and recorded, they are used as copy protection keys.
The copy protection key can be easily processed.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a format for realizing an embodiment of a method for recording and writing copyright management information on a disk according to the present invention, and a disk.

FIG. 2 is an explanatory diagram showing details of copyright management information of FIG. 1;

FIG. 3 is an explanatory diagram showing a method for recording and writing a copyright management information of a disk according to the present invention, and a format for realizing a second embodiment of the disk;

FIG. 4 is an explanatory diagram showing a method for recording and writing a copyright management information of a disk according to the present invention and a format for realizing a third embodiment of the disk;

FIG. 5 is a block diagram illustrating an example of a configuration of a DVD-audio encoder.

FIG. 6 is a block diagram illustrating an example of a DVD-audio playback device.

FIG. 7 is a flowchart illustrating an example of a reproduction process of the DVD-audio reproduction device in FIG. 6;

FIG. 8 is a block diagram illustrating another example of a DVD-audio playback device.

FIG. 9 is a flowchart for explaining an example of a reproduction process of the DVD-audio reproduction device in FIG. 8;

FIG. 10 is an explanatory diagram showing a recording method and a writing method of a copyright management information of a disk according to the present invention, and a format for realizing a fourth embodiment of the disk.

FIG. 11 is an explanatory diagram showing a write signal of copyright management information according to a fourth embodiment.

FIG. 12 is a block diagram illustrating a copyright management information writing device according to a fourth embodiment.

FIG. 13 is a flowchart for explaining processing of the copyright management information writing device of FIG. 12;

FIG. 14 is a block diagram illustrating an example of a configuration of an enhanced CD encoder.

FIG. 15 is a block diagram illustrating an example of an enhanced CD playback device.

FIG. 16 is a block diagram showing another example of the enhanced CD reproducing device.

FIG. 17 is a flowchart illustrating an example of a reproduction process of the enhanced CD reproduction device in FIG. 15;

FIG. 18 is a flowchart illustrating an example of a reproduction process of the enhanced CD reproduction device in FIG. 16;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 A / D converter 2 Signal processing circuit 3 Memory 4 DVD encoding circuit 4A Enhanced CD encoding circuit (CD encoding and C
D-ROM encoding) 5 Copyright encoding circuit 6 Modulation circuit 7 Laser cutting unit 11 Optical disk (DVD) 11A Optical disk (Enhanced CD) 12 Disk drive unit 13 Demodulation circuit 14 DVD decoding circuit 14A, 14A ', 17A Format decoding unit 14B, 14B ', 17B Descramble section 14C Enhanced CD decoding circuit 15 D / A converter 16 Output terminal 18 Key verification circuit 19 Reference data supply section 20 Reject mechanism 21 Tray 22 Lid

Claims (16)

[Claims] 1. A disc comprising: a step of scrambling an SID code indicating a creator of the disc as copyright management information of the disc; and a step of recording the scrambled SID code in a control data section of a lead-in section of the disc. How to record copyright management information. 2. A step of scrambling an SID code indicating a creator of the disc as copyright management information of the disc, and an ISRC code indicating a program source recorded on the disc, and transmitting the scrambled SID code and ISRC code to the disc. Recording in a control data section of the lead-in section. 3. The method according to claim 1, further comprising the steps of: scrambling an SID code indicating a creator of the disc as copyright management information of the disc; and recording the scrambled SID code in a copyright management information area of the disc. How to record rights management information. 4. A step of scrambling an SID code indicating a creator of the disc as copyright management information of the disc, and an ISRC code indicating a program source recorded on the disc, and transmitting the scrambled SID code and ISRC code to the disc. Recording the copyright management information in the copyright management information area. 5. A disk copyright management information comprising: a step of scrambling an SID code indicating a creator of the disk as copyright management information of the disk; and a step of writing the scrambled SID code to the disk by laser cutting. Writing method. 6. A step of scrambling an SID code indicating a creator as copyright management information of the disc and an ISRC code indicating a program source recorded on the disc; and laser cutting the scrambled SID code and ISRC code. Writing the copyright management information of the disk. 7. A disc in which an SID code indicating a creator of the disc is scrambled as copyright management information of the disc, and the scrambled SID code is recorded in a control data section of a lead-in section. 8. An SID code indicating a creator of the disk as copyright management information and an ISRC code indicating a program source recorded on the disk are scrambled, and the scrambled SID code and ISRC
A disc with codes recorded in the control data section of the lead-in section. 9. A disk in which an SID code indicating a creator of the disk is scrambled as copyright management information of the disk, and the scrambled SID code is recorded in a copyright management information area. 10. An SID code indicating a creator of the disk as copyright management information and an ISRC code indicating a program source recorded on the disk are scrambled, and the scrambled SID code and ISRC
A disc with a code recorded in the copyright management information area. 11. A disk in which an SID code indicating a creator of the disk is scrambled as copyright management information of the disk, and the scrambled SID code is written by laser cutting. 12. An SID code indicating a creator of the disc as copyright management information of the disc and an ISRC code indicating a program source recorded on the disc are scrambled, and the scrambled SID code and the ISRC
A disc with a code written by laser cutting. 13. A step of scrambling an SID code indicating a creator of the disc as copyright management information of the disc;
And C. recording the copyright management information of the disc. 14. A step of scrambling an SID code indicating a creator of the disc as copyright management information of the disc, and an ISRC code indicating a program source recorded on the disc, and transmitting the scrambled SID code and ISRC code to the disc. Recording the copyright management information on the disc. 15. A disk in which an SID code indicating a creator is scrambled as copyright management information of the disk, and the scrambled SID code is recorded in a TOC of the disk. 16. An SID code indicating a creator of the disk as copyright management information and an ISRC code indicating a program source recorded on the disk are scrambled, and the scrambled SID code and ISRC
A disc whose code is recorded in the TOC of the disc.