JP2002324348A - Data recording medium, data recording device and data recording method, and data reproducing device and data reproducing method - Google Patents

Abstract

(57) [Problem] To provide a data recording medium capable of protecting discontinuous digital data recorded in a plurality of different areas from illegal copying. SOLUTION: This optical disc 1 reproduces encrypted data recorded in a double-density area 5 using digital data recorded in an inner peripheral area and digital data recorded in an outer peripheral area. New data is generated. This new data is information for decrypting the encrypted data. Further, in the optical disc 1, the inner peripheral area and the outer peripheral area can be said to be two areas physically divided via a boundary. More specifically, the optical disc 1 reproduces the encrypted data by combining the additional data of the content data recorded in the inner area and the additional data of the content data recorded in the outer area. To generate decryption information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data recording medium on which digital data including copyrighted data such as music is recorded, a data recording apparatus and a data recording method for producing the data recording medium, and the digital data. The present invention relates to a data reproducing apparatus and a data reproducing method for reproducing the digital data from a data recording medium on which is recorded.

[0002]

2. Description of the Related Art In recent years, as digital recording media such as optical disks have become larger in capacity and spread, it has become important to prevent illegal copying in order to protect the copyright of recorded signals. That is, in the case of digital audio data or digital video data, a copy without deterioration can be easily generated by copying or dubbing, and in the case of computer data, the same data as the original data can be easily copied. However, the fact is that illegal copying has already caused adverse effects such as copyright infringement.

[0003] In view of the above, for the purpose of preventing illegal copying in so-called digital dubbing, in which a digital signal obtained by reproducing a signal recorded on a digital recording medium is recorded again on the digital recording medium, the original digital recording medium is used. It is considered to record encrypted data.

In recent years, in a read-only optical disk, it has been considered that the recording density differs between an inner peripheral area and an outer peripheral area, and physically discontinuous digital data is recorded in each area. ing. Then, the digital data recorded in one area is data having a special feature as compared with the digital data recorded in the other area. It is desired that this characteristic data be strongly protected from illegal copying.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a data recording medium and a data recording medium capable of protecting discontinuous digital data recorded in a plurality of different areas from illegal copying. A recording device and a data recording method are provided.

Further, in order to protect discontinuous digital data recorded in a plurality of different areas from illegal copying, the data recording apparatus and a data reproducing apparatus capable of reproducing the data recording medium created by the data recording method. And a data reproducing method.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a data recording medium according to the present invention has different physical characteristics in a data recording medium on which at least digital data including copyrighted data is recorded. The digital data is reproduced by using the digital data recorded in the area.

According to another aspect of the present invention, there is provided a data recording medium which is physically divided via a boundary in a data recording medium on which digital data including at least copyrighted data is recorded. The digital data is reproduced using the digital data recorded in at least two areas.

In order to solve the above-mentioned problems, a data recording device according to the present invention is a data recording device for producing a data recording medium on which digital data is recorded. The data is recorded in different areas of the data recording medium with different physical characteristics together with the additional data added to the object data.

The data recording device performs predetermined signal processing on at least one of the copyrighted work data using new data generated by the additional data of the at least two copyrighted work data, and performs the predetermined signal processing. One of the copyrighted data subjected to the signal processing is recorded in a different area of the data recording medium with a physical characteristic different from that of the other copyrighted data.

In this data recording apparatus, the first copyrighted work data and the first additional data added to the copyrighted work data, the second copyrighted work data and the second additional data added to the copyrighted work data are provided. When the additional data is recorded in two areas with different physical characteristics, at least the first copyrighted work data and the first additional data are modulated, and the modulated output is subjected to the first recording signal processing. 1, a second copyrighted work data which has been subjected to predetermined signal processing using new data generated from the first additional data and the second additional data, and the second additional data. A second processing system that performs second recording signal processing on the modulated output after at least modulation is used.

In order to solve the above problems, a data recording method according to the present invention is a data recording method for producing a data recording medium on which digital data is recorded. The data recording medium is created by recording the data together with the additional data to be added to the object data in different areas of the data recording medium with mutually different physical characteristics.

In the data recording method, at least one of the copyrighted work data is subjected to a predetermined signal processing using new data generated by the additional data of the at least two copyrighted work data, and the predetermined data processing is performed. One of the copyrighted data subjected to the signal processing is recorded in a different area of the data recording medium with a physical characteristic different from that of the other copyrighted data.

Further, in this data recording method, the first literary work data and the first additional data added to the literary work data, the second literary work data and the second additional data to be added to the literary work data are provided. When the additional data is recorded in two areas with different physical characteristics, at least the first copyrighted work data and the first additional data are modulated, and the modulated output is subjected to the first recording signal processing. (1) processing the second copyrighted work data and the second additional data, which have been subjected to predetermined signal processing using new data generated from the first additional data and the second additional data, and And a second processing step of performing a second recording signal processing on the modulated output at least after the modulation.

In order to solve the above-mentioned problems, a data recording apparatus according to the present invention is a data recording apparatus for producing a data recording medium on which digital data is recorded. Along with each additional data added to the object data, it is recorded in at least two areas physically divided via a boundary portion.

The data recording device performs a predetermined signal processing on at least one of the copyrighted work data using new data generated by the additional data of each of the at least two copyrighted work data, One piece of copyrighted data that has been subjected to the signal processing is recorded in an area physically separated from the other copyrighted data via a boundary.

In this data recording apparatus, the first copyrighted work data and the first additional data added to the copyrighted work data, the second copyrighted work data and the second additional data added to the copyrighted work data are provided. Is recorded in two areas divided physically via a boundary portion, at least the first copyrighted work data and the first additional data are modulated, and the modulated output is subjected to the first recording. A first processing system for performing signal processing; a second copyrighted work data that has been subjected to predetermined signal processing using new data generated from the first additional data and the second additional data; And a second processing system for performing a second recording signal process on the modulated output after at least modulating the additional data.

[0018] In order to solve the above-mentioned problems, a data recording method according to the present invention is a data recording method for producing a data recording medium on which digital data is recorded. The data recording medium is created by recording, together with each additional data to be added to the object data, in two areas that are physically separated from each other via a boundary portion.

In the data recording method, at least one of the copyrighted work data is subjected to a predetermined signal processing using new data generated by the additional data of the at least two copyrighted work data, and the predetermined data processing is performed. One piece of copyrighted data that has undergone signal processing is recorded in an area that is physically separated from the other copyrighted data via a boundary.

Further, in this data recording method, the first literary work data and the first additional data added to the literary work data, the second literary work data and the second additional data to be added to the literary work data are provided. Is recorded in two areas divided physically via a boundary portion, at least the first copyrighted work data and the first additional data are modulated, and the modulated output is subjected to the first recording. A first processing step of performing signal processing; a second copyrighted work data which has been subjected to predetermined signal processing using new data generated from the first additional data and the second additional data; And a second processing step of performing second recording signal processing on the modulated output after at least modulating the additional data.

According to another aspect of the present invention, there is provided a data reproducing apparatus for reproducing at least two copyrighted data recorded in different areas on a data recording medium with different physical characteristics. And reproducing the respective additional data added to the respective copyrighted data from the different areas, and controlling the reproduction of the at least two copyrighted data using the additional data.

This data reproducing apparatus reproduces the at least two copyrighted work data and their additional data from the different areas, generates new additional data based on the additional data, and uses the new additional data. In addition, at least one of the copyrighted work data is subjected to predetermined signal processing and reproduced, and the other copyrighted data is also reproduced.

In this data reproducing apparatus, the first copyrighted work data and the first additional data added to the copyrighted work data, the second copyrighted work data and the second additional data added to the copyrighted work data are provided. When reproducing the additional data from the two areas of the data recording medium, a first processing system for reproducing the first copyrighted work data, and new data from the first additional data and the second additional data. A second processing system that generates and performs predetermined signal processing on the second copyrighted work data using the new data to reproduce the copyrighted work data.

According to another aspect of the present invention, there is provided a data reproducing method for reproducing at least two copyrighted data recorded in different areas on a data recording medium with different physical characteristics. In the playback method,
Respective additional data added to each copyrighted data is reproduced from the different areas, and reproduction of the at least two copyrighted data is controlled using the additional data.

In the data reproducing method, the at least two copyrighted data and the additional data thereof are reproduced from the different areas, new additional data is generated by the additional data, and the new additional data is used. In addition, at least one of the copyrighted work data is subjected to predetermined signal processing and reproduced, and the other copyrighted data is also reproduced.

Further, the data reproducing method includes a first literary work data and a first additional data added to the literary work data, a second literary work data and a second additional data to be added to the literary work data. When reproducing the additional data from the two areas of the data recording medium, a first processing step of reproducing the first copyrighted work data, and new data from the first additional data and the second additional data. A second processing step of generating and reproducing the second copyrighted work data by performing predetermined signal processing using the new data.

According to another aspect of the present invention, there is provided a data reproducing apparatus for reproducing at least two pieces of copyrighted data recorded in two areas physically divided via a boundary portion. The apparatus reproduces respective additional data added to each copyrighted data from the different areas, and controls reproduction of the at least two copyrighted data using the additional data.

The data reproducing apparatus reproduces the at least two copyrighted work data and their additional data from the different areas, generates new additional data based on the additional data, and uses the new additional data. In addition, at least one of the copyrighted work data is subjected to predetermined signal processing and reproduced, and the other copyrighted data is also reproduced.

Further, in this data reproducing apparatus, the first copyrighted work data and the first additional data added to the copyrighted work data, the second copyrighted work data and the second additional data added to the copyrighted work data are provided. When reproducing the additional data from the two areas of the data recording medium, a first processing system for reproducing the first copyrighted work data, and new data from the first additional data and the second additional data. A second processing system that generates and performs predetermined signal processing on the second copyrighted work data using the new data to reproduce the copyrighted work data.

[0030] In order to solve the above-mentioned problems, a data reproducing method according to the present invention is intended to reproduce at least two copyrighted work data recorded in two regions physically divided via a boundary portion. In the data reproducing method, each additional data added to each copyrighted data is reproduced from the different area, and the reproduction of the at least two copyrighted data is controlled using the additional data.

In the data reproducing method, the at least two copyrighted data and the additional data thereof are reproduced from the different areas, new additional data is generated by the additional data, and the new additional data is used. In addition, at least one of the copyrighted work data is subjected to predetermined signal processing and reproduced, and the other copyrighted data is also reproduced.

Further, in this data reproducing method, the first literary work data and the first additional data added to the literary work data, the second literary work data and the second additional data to be added to the literary work data are provided. When reproducing the additional data from the two areas of the data recording medium, a first processing step of reproducing the first copyrighted work data, and new data from the first additional data and the second additional data. A second processing step of generating and reproducing the second copyrighted work data by performing predetermined signal processing using the new data.

[0033]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a data recording medium according to the present invention, a data recording apparatus and a recording method for generating the data recording medium, and a data reproducing apparatus and a reproducing method for reproducing data from the data recording medium will be described. The embodiment will be described.

First, an embodiment of the data recording medium according to the present invention is an optical disc 1 shown only in half in FIG.
Digital data including copyrighted data based on content such as music is recorded. Needless to say, the actual optical disk 1 is disk-shaped as shown in the figures described later.

In particular, in the optical disc 1, the inner peripheral area is a lead-in 2 and a single-density area 3, and the outer peripheral area is a lead-in 4 and a double-density area 5. The recording density of digital data is different. . The inner peripheral area is a CD (Co
mpact Disc) compatible part, CD-DA (Digital Audio) or Yel standardized by Red Book (standards)
CD-ROM (Read Only Memor) specified by low Book
y) Includes sessions. The outer area is a double-density CD
This is the GigaCD part defined in the Purple Book. The digital data recorded in the inner peripheral area and the digital data recorded in the outer peripheral area are physically discontinuous data. Encrypted data may be recorded in the double-density area 5 on the outer peripheral area.

The optical disk 1 uses the digital data recorded in the inner peripheral area and the digital data recorded in the outer peripheral area to store, for example, encrypted data recorded in the double density area 5. New data for reproducing the. This new data is information for decrypting the encrypted data.

Further, in the optical disc 1, the inner peripheral area and the outer peripheral area can be said to be two areas physically divided via a boundary portion. Also in this optical disc 1, for example, encrypted data recorded in the double density area 5 is reproduced using digital data recorded in the inner peripheral area and digital data recorded in the outer peripheral area. For this purpose, decoding information is generated.

More specifically, the optical disc 1 includes additional data of the content data recorded in the inner peripheral area,
Decryption information for reproducing the encrypted data is generated by combining with the additional data of the content data recorded in the outer peripheral area.

Next, a description will be given of a data recording device 10 shown in FIG. 2, which is an embodiment of the data recording device and the data recording method of the present invention.

This data recording device 10 is used for producing the optical disc 1 shown in FIG. That is, when recording digital data including two contents on the optical disc 1, the data recording apparatus 10 performs an encryption process on one of the contents data using new data created by the additional data of the two contents. , And one of the encrypted contents is physically discontinuously recorded in a different area at a recording density different from that of the other content.

The data recording device 10 is a specific example of a cutting device used in a cutting step in a procedure for manufacturing an optical disc as a recording medium.
First, an example of a procedure for manufacturing an optical disk will be described. A photoresist is applied to the polished glass master in a resist application step, and the photoresist applied to the glass master is cut in a cutting step. Next, in the developing / fixing step, the cut master is developed and fixed, and the surface is subjected to electrolytic plating in a metal master forming step. Subsequently, through a stamper step and a substrate forming step, a transparent resin substrate such as polycarbonate (PC) or acrylic is formed. Next, in a reflective film forming step, a reflective film is formed on the transparent resin substrate by sputtering. Next, in a protective film application step, a protective film is applied and formed by spin coating.

The details of the data recording device 10 used as a cutting device in the above-described cutting step will be described below.

This data recording device 10 stores content 1
And first additional data A added to the content 1
A first recording processing system that performs at least modulation processing and predetermined recording signal processing to generate digital data to be recorded on the inner peripheral side area of the optical disc 1, a first additional data A and a second additional data A At least a modulation process is performed on the encrypted content 2 that has been encrypted using the new data C generated from the additional data B and the second additional data B,
And a second recording processing system that performs predetermined recording signal processing to generate digital data to be recorded in the outer peripheral area of the optical disc 1.

The first recording processing system includes an encoder 15 for encoding the content 1 supplied from the input terminal 11 and the first additional data A supplied from the input terminal 13.
And a modulator 16 for modulating the encoded output from the encoder 15 and a recording circuit 17 for performing a predetermined recording signal processing on the modulated output from the modulator 16.

The second recording processing system includes an input terminal 13
A mixing unit 20 that mixes the first additional data A supplied from the input terminal 14 and the second additional data B supplied from the input terminal 14 to generate new data C serving as an encryption key. The content 2 using the encryption key generated in
An encryption unit 19 for performing encryption processing on the
An encoder 21 that encodes the encrypted output from the encoder and the second additional data B, a modulator 22 that modulates the encoded output from the encoder 21, and performs a predetermined recording signal process on the modulated output from the modulator 22. And a recording circuit 23.

The data recording apparatus 10 includes a switching unit 18 for switching the output of each recording processing system in addition to the first recording processing system and the second recording processing system, and a recording switching unit for controlling switching by the switching unit 18. A control unit 24 and an optical head 25 for emitting a recording laser beam corresponding to a switching output from the switching unit 18 to a photoresist applied on the glass master 100
And a spindle motor 26 for rotating the glass master 100
And

Glass master 1 coated with photoresist
00 is rotated by a spindle motor 26 driven by the control of the spindle servo circuit. At this time, the spindle motor 26 outputs an FG signal whose signal level rises at every predetermined rotation angle by the FG signal generator provided at the bottom. The spindle servo circuit is the F
The spindle motor 26 is controlled so that the G signal has a predetermined frequency.
Drive. Thus, the master disc 100 is driven to rotate, for example, at a constant linear velocity.

The optical head 25 has a recording laser constituted by a gas laser or the like, and irradiates a photoresist on the glass master 100 with a predetermined amount of laser beam.

The encoder 15 of the first recording processing system encodes the content 1 and the first additional data A.
In this case, encoding is performed in a format used in CD-DA standardized in the Red Book (standards book). The modulation unit 16 performs, for example, EFM modulation (8-14 modulation) on the encoded output from the encoder 15 and supplies the modulated output to the recording circuit 17. The recording circuit 17 performs predetermined recording signal processing on the EFM modulation output. Finally recording circuit 1
The output of No. 7 is C standardized in the Red Book (standards).
The recording density becomes similar to the recording density of D-DA. In this embodiment, this recording density is referred to as single density.

The first additional data A is, for example, an existing recording format (hereinafter referred to as an old format).
The recording is performed by changing the shape and position of the recording pits formed according to the above, does not affect the data reproduction of the old format by the existing reproducing apparatus, and has a new recording format (hereinafter, referred to as a new format). The upper compatibility is guaranteed such that the first additional data A can also be read only when played back by a playback device corresponding to.

More specifically, while the content 1 is a so-called pit edge recording in which the recording pits are modulated by edges or lengths of the recording pits in the track longitudinal direction, the first additional data A includes recording pits. Recording is performed by displacing in the tracking direction (track width direction) or changing the width (dimension in the track width direction) of the recording pit. The amount of change in the position or shape of these pits is kept within the range of an error in an existing reproducing apparatus so as not to hinder the reproduction of data of the old format.

The encoder 21 of the second recording processing system encodes the content 2 and the second additional data B, which have been encrypted by the encryption unit 19 using the new data C. In this case, the Giga specified in the Purple Book
Encode in the format used for the CD part. The modulation unit 22 modulates the encoded output from the encoder 21 by a predetermined modulation method, and supplies the modulated output to the recording circuit 23. The recording circuit 23 performs predetermined recording signal processing on the modulated output. Finally, the output of the recording circuit 23 is the Purp
The recording density is the same as the recording density specified by le Book. In this embodiment, this recording density is referred to as double density with respect to the single density.

The second additional data B is also a so-called pit edge recording in which the encrypted content 2 is modulated by the edge or length of the recording pit in the track longitudinal direction, whereas the recording pit is shifted in the tracking direction. (Track width direction) or by changing the width (dimension in the track width direction) of the recording pit.

The switching section 18 switches single density or double density recording signals supplied to the optical head 25 under the control of the recording switching control section 24. The recording switching control unit 24 controls switching by the switching unit 18 according to the division of the inner peripheral area or the outer peripheral area.

Therefore, the photoresist applied on the glass master 100 has the contents 1 and the first in the inner peripheral area.
The mark corresponding to the additional data A is exposed, and the mark corresponding to the encrypted content 2 and the second additional data B is exposed in the outer peripheral area.

Thereafter, the glass master 100 exposed by the data recording apparatus 10 (cutting step) is developed and fixed in a developing / fixing step, and the surface is subjected to electrolytic plating in a metal master forming step to form a mother disk. After formation, a stamper process and a substrate forming process are performed to form a transparent resin substrate such as polycarbonate (PC) or acrylic. After that, the optical disc 1 is manufactured through a reflective film forming step and a protective film applying step.

Here, the first additional data A and the second additional data B are generated by random numbers or the like. Further, as a recording method, it is also possible to embed in three connection bits used for EFM modulation.

Further, TOC information to be put in the lead-in area 2 and the lead-in area 4 may be shared. T
An example of using the OC information will be described with reference to FIG. FIG. 3 is a diagram showing the format of the TOC.

The contents of the TOC in the inner peripheral area of the optical disk 1 are in the lead-in area 2. S surrounded by broken line
This is a configuration of a 96-bit Q channel following a synchronization code of 0 and S1. Following the 4-bit control (CONTROL), there are four bits of the address (ADR). Next, the movement number TNO is followed by 8 bits. Then, 8 bits are prepared as a point POINT, and the elapsed time in the movement
Eight bits are provided for each of MIN, second SEC, and frame number FRAME. Then, after the zero ZERO of 8 bits, the absolute time of the contents of the point POINT is prepared for each 8 bits as minute PMIN, second PSEC, and frame number PFRAME.

When the point POINT is from 00 to 99, it indicates the absolute time at which each movement indicated by the numeral starts. Also,
When the point POINT = A0, PMIN is the first movement number, and PSEC and PFRAME are 0. Point POINT
= A1, PMIN is the last movement number, PS
EC and PFRAME become 0. When the point POINT = A2, PMIN, PSEC, and PFRAME are absolute times at which lead-out starts.

From the TOC in the lead-in area 2,
For example, 96 bits or 2 × 96 bits when the point POINT has a predetermined value are taken out as original data for generating the decoding information.

Similarly, from the lead-in area 4 of the outer peripheral side area, 96 bits or 2 × 96
The bits are extracted and used as original data. The decoded information is generated by mixing original data of 192 bits × 2 = 384 bits or more.

The original data for generating the decoding information described above is merely an example, and the present invention is not limited to this.
For example, it is conceivable to use the r and w channels of the subcode.

Also, for example, a minute which is the elapsed time in a movement
A total of 24 bits of MIN, second SEC and frame number FRAME may be adjusted to a random number and recorded in the double density area 5.

As described above, the optical disc 1 generated by the data recording device 10 mixes data to be recorded in the inner and outer peripheral areas to generate an encryption key, and performs an encryption process using the encryption key. The recorded content 2 is recorded in the outer peripheral area at double density together with the second additional data B. The content 1 and the first additional data A are simply recorded in the inner peripheral area.

Incidentally, there is no recordable disc having both single density and double density. Therefore, the new signal combining the two signals is not copied to the recordable disc. Therefore, the optical disc 1 can protect each content from unauthorized copying.

Note that the first additional data A and the second additional data B may be individual identification information (Unique IDentification: UID) for specifying each content / optical disc 1. With this individual identification information, each medium can be identified one by one, so that even if there is one million identical optical disks 1, for example, one of them can be distinguished from the others. UI
If D is registered, you can know who's CD.

The first additional data A and the second additional data B are stored in the optical disk 1 as a ROM disk or as an R disk.
/ RW disc is also used as an identification signal for identifying the disc. The method of determining the identification signal will be described later. Next, a data reproducing apparatus 30 shown in FIG. 4 which is an embodiment of the data reproducing apparatus and the data reproducing method of the present invention will be described.

The data reproducing apparatus 30 includes a first reproduction processing system and a second reproduction processing system, and reproduces the contents 1 and the contents 2 from the optical disc 1 shown in FIG.
In other words, the data reproducing apparatus 30 performs the first operation from the optical disc 1 on which the content 1 or the content 2 having different recording densities are discontinuously recorded in the inner peripheral area or the outer peripheral area.
The content 1 or the content 2 is reproduced by using the reproduction processing system or the second reproduction processing system.

Further, the data reproducing device 30
A spindle motor 48 for rotating the optical disc 1, an optical pickup 31 for reading a recording signal from the rotated optical disc 1,
A servo circuit 49 is provided to control the rotation of the spindle motor 48 and the focus and tracking of the optical pickup 31 on the optical disk 1.

The data reproducing apparatus 30 includes an amplifier 32 for amplifying a signal optically read by the optical pickup 31, a first reproduction processing system or a second reproduction processing for the amplified signal from the amplifier 32. The system includes a switching unit 33 for switching and transferring the switching system, and a switching signal extracting unit 34 for extracting a switching signal for controlling the switching operation of the switching unit 33 from the amplified output signal.

The first reproduction processing system includes an RF amplifier 35
And a demodulation circuit 36 and an error correction decoding circuit 37. The RF signal read from the optical disc 1 by the optical pickup 31 is subjected to demodulation processing and decoding processing to perform content 1 decoding.
And the first additional data A, and supplies the content 1 to the output terminal 45, and supplies the first additional data A to a hold or delay circuit 41 that constitutes a new data generation unit described later.

The RF amplifier 35 binarizes the RF signal, extracts the signal recorded on the optical disc 1, and
The digitized signal is sent to the demodulation circuit 36. Further, the RF amplifier 35 separates a synchronization signal from the RF signal read from the inner peripheral area, extracts a tracking error signal, a focus error signal, and the like, and sends the signal to the servo circuit 49.

The demodulation circuit 36 performs a process for demodulating the modulation applied when recording the content data on the optical disc 1, for example, an EFM demodulation process. The digital data from the demodulation circuit 36 is sent to the error correction decoding circuit 37.

The error correction decoding circuit 37
The digital data is subjected to a reverse process of the error correction coding performed when the content data 1 is recorded on the digital data, and the content 1 and the first additional data A are separated and output.

The second reproduction processing system includes an RF amplifier 38
, A demodulation circuit 39 and an error correction decoding circuit 40. The RF signal read by the optical pickup 31 from the optical disc 1 is subjected to demodulation processing and decoding processing, and the encrypted content 2 and the second additional data B are And supplies the encrypted content 2 to the encryption / decryption circuit 43,
The second additional data B is supplied to a mixing unit 42 described later.
The encryption / decryption circuit 43 is also included in the second reproduction processing system, and decrypts the encrypted content 2 and supplies it to the output terminal 46.

Further, the second reproduction processing system includes a new data generation unit for generating new data C required when the content 2 is decrypted by the encryption / decryption circuit 43. The new data generator is a hold or delay circuit 41 for delaying the first additional data A extracted by the error correction decoding circuit 37 of the first reproduction processing system, and is delayed by the hold or delay circuit 41. And a mixing unit 42 for generating new data C from the first additional data A and the second additional data B supplied from the error correction decoding circuit 40.

The RF amplifier 38 binarizes the RF signal, extracts the signal recorded on the optical disk 1, and extracts the signal.
The digitized signal is sent to the demodulation circuit 39. Further, the RF amplifier 38 separates a synchronizing signal from the RF signal read from the outer peripheral area, extracts a tracking error signal, a focus error signal, and the like, and sends the signal to the servo circuit 49.

The demodulation circuit 39 performs a process of demodulating the modulation applied when recording the content data 2 on the optical disk 1. The digital data from the demodulation circuit 39 is sent to the error correction decoding circuit 40.

The error correction decoding circuit 40
, An inverse process of the error correction coding performed when the encrypted content 2 is recorded on the data recorded in the outer peripheral area, and the encrypted content 2 and the second additional data B are separated. The encrypted content 2 is supplied to the encryption / decryption circuit 43, and the second additional data B is supplied to the mixing unit 42.

The mixing section 42 generates new data C as a decryption key similar to the encryption key from the first additional data A and the second additional data B, and supplies the new data C to the encryption / decryption circuit 43.

The decryption circuit 43 decrypts the encrypted content 2 supplied from the error correction decryption circuit 40 using the new data C, and supplies the content 2 to the output terminal 46.

As described above, the data reproducing device 30
The additional data A is extracted from the inner peripheral area and the second additional data B is extracted from the outer peripheral area to generate new data C,
Using this as a decryption key, the content 2 can be decrypted and reproduced. Of course, the content 1 can also be reproduced.

Next, a data reproducing apparatus 50 shown in FIG. 5, which is another embodiment of the data reproducing apparatus and the data reproducing method of the present invention, will be described.

The data reproducing apparatus 50 has a first reproduction processing system and a second reproduction processing system, and reproduces the contents 1 and the contents 2 from the optical disk 1 shown in FIG.
At this time, whether or not the optical disk 1 is a ROM disk is determined by the first area recorded along with the content 1 in the inner peripheral area.
The determination unit 44 determines whether or not the additional data A and the second additional data B recorded together with the content 2 in the outer peripheral area can be read.

For this reason, the first additional data A separated and generated by the error correction decoding circuit 37 of the first reproduction processing system and the second additional data A separated and generated by the error correction decoding circuit 40 of the second reproduction processing system. The additional data B is supplied to the determination unit 44.

The discriminator 44 determines whether the first additional data A and the second
When both of the additional data B can be read, a determination signal indicating that the optical disk 1 is a ROM disk is supplied to the output terminal 47. When only the first additional data A can be read, the determination section 44 outputs a determination signal indicating that the optical disk 1 is a recordable disk to the output terminal 47.
To supply.

Next, a data reproducing apparatus 60 shown in FIG. 6, which is another embodiment of the data reproducing apparatus and the data reproducing method of the present invention, will be described.

The data reproducing device 60 is a device including the characteristic configuration of each of the data reproducing device 30 and the data reproducing device 50. Using the first additional data A recorded on the inner peripheral area of the optical disc 1 and the second additional data B recorded on the outer peripheral area, new data C serving as a decryption key is generated and encrypted. It has both a configuration for decoding the content 2 and a configuration for determining the type of the recording medium according to whether or not the first additional data A and the second additional data B can be read. Since the detailed configuration has already been described, the description is omitted here.

In each of the above embodiments, the recording density is made different between the inner peripheral area and the outer peripheral area of the optical disc 1. However, the same recording density may be used.

Further, the present invention is not limited to only the above-described embodiment. For example, in the above-described embodiment, an optical disk has been mainly described, but the present invention can be applied to a recording medium such as a card or a tape. Also, the data modulation method is not limited to EFM (8-14 conversion), and various modulation methods such as EFM plus can be used. In addition, it goes without saying that various changes can be made without departing from the spirit of the present invention.

[0092]

According to the data recording medium of the present invention, discontinuous digital data recorded in a plurality of different areas can be protected from illegal copying.

Further, according to the data recording apparatus and the data recording method of the present invention, it is possible to provide a data recording medium capable of protecting discontinuous digital data recorded in a plurality of different areas from illegal copying.

According to the data reproducing apparatus and the data reproducing method of the present invention, the data recording medium created by the data recording apparatus and the data recording method can be reproduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing an optical disc as an embodiment of a data recording medium according to the present invention.

FIG. 2 is a block diagram showing a configuration of a data recording device according to an embodiment of the data recording device and the data recording method according to the present invention.

FIG. 3 is a format diagram of a TOC entering a lead-in.

FIG. 4 is a block diagram showing a configuration of a data reproducing apparatus according to an embodiment of the data reproducing apparatus and the data reproducing method according to the present invention.

FIG. 5 is a block diagram showing a configuration of a data reproducing apparatus according to another embodiment of the data reproducing apparatus and the data reproducing method according to the present invention.

FIG. 6 is a block diagram showing a configuration of a data reproducing apparatus according to still another embodiment of the data reproducing apparatus and the data reproducing method according to the present invention.

[Explanation of symbols]

1 optical disk, 2 single-density area lead-in, 3 single-density area, 4 double-density area lead-in, 5 double-density area, 10 data recording device, 15, 21, encoder, 16, 22
Modulation unit, 17, 23 recording circuit, 25 optical head, 1
00 glass master

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04L 9/08 H04L 9/00 601B (72) Inventor Tatsuya Inoguchi 6-35 Kita Shinagawa, Shinagawa-ku, Tokyo No. Sony Corporation F term (reference) 5B017 AA06 BA07 CA09 5D044 BC06 CC04 DE02 DE76 GK17 HL08 5J104 AA13 AA16 EA04 NA02 PA14

Claims (42)

[Claims] 1. A data recording medium on which at least digital data including copyrighted data is recorded, wherein the digital data is reproduced by using the digital data recorded in different areas with different physical characteristics. A data recording medium characterized by the above-mentioned. 2. The data recording medium according to claim 1, wherein the digital data is recorded at the same density / different density in the different areas. 3. The data recording medium according to claim 1, wherein the digital data is used to generate new data for reproducing the digital data. 4. The data recording medium according to claim 3, wherein the new data is data for decrypting encrypted digital data. 5. The data recording medium according to claim 3, wherein the new data is information for specifying a type of the data recording medium. 6. A data recording medium on which digital data including at least literary work data is recorded, wherein the digital data is recorded using at least two areas physically divided via a boundary portion. A data recording medium for reproducing data. 7. The data recording medium according to claim 6, wherein the digital data is recorded at the same density / different density in the at least two areas. 8. The data recording medium according to claim 6, wherein said digital data is used to generate new data for reproducing said digital data. 9. The data recording medium according to claim 8, wherein the new data is data for decrypting encrypted digital data. 10. The data according to claim 8, wherein the new data is information for specifying a type of a data recording medium.
The data recording medium described in the above. 11. A data recording device for producing a data recording medium on which digital data is recorded, wherein at least two copyrighted data are different from each other together with respective additional data added to each copyrighted data. A data recording apparatus characterized in that data is recorded in different areas of the data recording medium with physical characteristics. 12. A predetermined signal processing is performed on at least one of the copyrighted data using new data generated by the additional data of each of the at least two copyrighted data, and the predetermined signal processing is performed. 12. The data recording apparatus according to claim 11, wherein one of the created copyrighted data is recorded in a different area of the data recording medium with a physical property different from that of the other copyrighted data. 13. The first copyrighted work data and the first additional data added to the copyrighted work data are different from the second copyrighted work data and the second additional data added to the copyrighted work data. A first processing system that modulates at least the first copyrighted work data and the first additional data and then performs the first recording signal processing on the modulated output when recording in the two areas with physical characteristics; After at least modulating the second copyrighted data and the second additional data that have been subjected to predetermined signal processing using new data generated from the first additional data and the second additional data, 13. The data recording apparatus according to claim 12, wherein a second processing system for performing a second recording signal processing on the modulated output is used. 14. The method according to claim 1, wherein the predetermined signal processing is processing for encrypting the second copyrighted work data using new data generated as an encryption key.
3. The data recording device according to 3. 15. A data recording method for producing a data recording medium on which digital data is recorded, wherein at least two pieces of copyrighted data are different from each other together with respective additional data added to each piece of copyrighted data. A data recording method, wherein the data recording medium is created by recording data in different areas of the data recording medium with physical characteristics. 16. A predetermined signal processing is performed on at least one of the copyrighted work data using new data generated by the additional data of each of the at least two copyrighted work data, and the predetermined signal processing is performed. 16. The data recording method according to claim 15, wherein the recorded one copyrighted work data is recorded in a different area of the data recording medium with physical characteristics different from those of the other copyrighted work data. 17. The first work data and the first additional data added to the work data are different from the second work data and the second additional data added to the work data. A first processing step of at least modulating the first copyrighted work data and the first additional data and then performing a first recording signal process on the modulated output when recording in the two areas with physical characteristics; After at least modulating the second copyrighted data and the second additional data that have been subjected to predetermined signal processing using new data generated from the first additional data and the second additional data, 17. The data recording method according to claim 16, wherein a second processing step of performing a second recording signal processing on the modulated output is used. 18. The method according to claim 1, wherein the predetermined signal processing is processing for encrypting the second copyrighted work data using new data generated as an encryption key.
7. The data recording method according to 7. 19. A data recording apparatus for producing a data recording medium on which digital data is recorded, wherein at least two copyrighted data are physically stored together with each additional data added to each copyrighted data. A data recording device, which is recorded in at least two areas divided via a boundary portion. 20. A predetermined signal processing is performed on at least one of the copyrighted work data using new data generated by the additional data of each of the at least two copyrighted work data, and the predetermined signal processing is performed. 20. The data recording apparatus according to claim 19, wherein one of the copyrighted work data is recorded in an area physically divided via a boundary with the other copyrighted work data. 21. The first literary work data and the first additional data added to the literary work data, and the second literary work data and the second additional data added to the literary work data are physically When recording is performed in two areas divided via a boundary portion, at least the first copyrighted work data and the first additional data are modulated and the modulated output is subjected to a first recording signal processing. And a second copyrighted work data that has been subjected to predetermined signal processing using new data generated from the first additional data and the second additional data, and the second additional data. 21. The data recording apparatus according to claim 20, wherein a second processing system that performs second recording signal processing on the modulated output after the modulation is used. 22. The method according to claim 2, wherein the predetermined signal processing is processing for encrypting the second copyrighted work data using new data generated as an encryption key.
2. The data recording device according to 1. 23. A data recording method for producing a data recording medium on which digital data is recorded, wherein at least two pieces of copyrighted data are physically combined with each additional data added to each piece of copyrighted data. A data recording method, wherein the data recording medium is created by recording data in two areas divided from each other via a boundary portion. 24. A predetermined signal processing is performed on at least one of the copyrighted work data using new data generated by the additional data of each of the at least two copyrighted work data, and the predetermined signal processing is performed. 24. The data recording method according to claim 23, wherein the recorded one copyrighted work data is recorded in an area that is physically separated from the other copyrighted work data via a boundary portion. 25. A method wherein the first work data and the first additional data added to the work data, and the second work data and the second additional data added to the work data are physically When recording is performed in two areas divided via a boundary portion, at least the first copyrighted work data and the first additional data are modulated and the modulated output is subjected to a first recording signal processing. And at least the second copyrighted data and the second additional data that have been subjected to the predetermined signal processing using the new data generated from the first additional data and the second additional data. 25. A data recording method according to claim 24, further comprising the step of: performing a second recording signal processing on the modulated output after the modulation. 26. The method according to claim 2, wherein the predetermined signal processing is processing for encrypting the second copyrighted work data using new data generated as an encryption key.
5. The data recording method according to item 5. 27. A data reproducing apparatus for reproducing at least two copyrighted data recorded in different areas on a data recording medium with different physical characteristics, wherein each additional data added to each copyrighted data is A data reproducing apparatus for reproducing data from each of the different areas, and controlling reproduction of the at least two copyrighted work data using the additional data. 28. The at least two pieces of copyrighted work data and their additional data are respectively reproduced from the different areas, new additional data is generated based on the additional data, and at least one of the additional data is generated using the new additional data. 28. The data reproducing apparatus according to claim 27, wherein one copyrighted data is subjected to predetermined signal processing and reproduced, and the other copyrighted data is also reproduced. 29. Data of the first literary work data and the first additional data added to the literary work data, the second literary work data and the second additional data added to the literary work data, When reproducing from two areas of the recording medium, a first processing system for reproducing the first copyrighted work data, and new data are generated from the first additional data and the second additional data. 29. The data reproducing apparatus according to claim 28, wherein a second processing system for performing predetermined signal processing on the second copyrighted work data using data and reproducing the processed data is used. 30. The predetermined signal processing is a processing of decrypting the second copyrighted work data using new data generated as a decryption key for decrypting a cipher. 30. The data reproduction device according to 29. 31. A data reproducing method for reproducing at least two copyrighted data recorded in different areas on a data recording medium with different physical characteristics, wherein each of the additional data added to each copyrighted data is provided. A data reproducing method comprising: reproducing data from the different areas; and controlling reproduction of the at least two copyrighted work data using the additional data. 32. The at least two copyrighted work data and their additional data are respectively reproduced from the different areas, new additional data is generated based on the additional data, and at least one of the additional data is generated using the new additional data. 32. The data reproducing method according to claim 31, wherein one copyrighted data is subjected to predetermined signal processing and reproduced, and the other copyrighted data is also reproduced. 33. Data of the first literary work data and the first additional data added to the literary work data, and the second literary work data and the second additional data added to the literary work data. When reproducing from two areas of the recording medium, a first processing step of reproducing the first copyrighted work data; and generating new data from the first additional data and the second additional data. 33. A data reproducing method according to claim 32, further comprising a second processing step of performing predetermined signal processing on said copyrighted work data using data and reproducing the processed copyrighted data. 34. The method according to claim 34, wherein the predetermined signal processing is processing for decrypting the second copyrighted work data using new data generated as a decryption key for decrypting a cipher. 33. The data reproducing method according to claim 33. 35. A data reproducing apparatus for reproducing at least two copyrighted work data recorded in two areas physically divided via a boundary portion, wherein each additional data added to each copyrighted work data Reproducing data from the different areas, and controlling the reproduction of the at least two copyrighted work data using the additional data. 36. The at least two copyrighted work data and their additional data are respectively reproduced from the different areas, new additional data is generated based on the additional data, and at least one of the additional data is generated by using the new additional data. 36. The data reproducing apparatus according to claim 35, wherein one copyrighted data is subjected to predetermined signal processing and reproduced, and the other copyrighted data is also reproduced. 37. Data of the first literary work data and the first additional data added to the literary work data, and the second literary work data and the second additional data added to the literary work data. When reproducing from two areas of the recording medium, a first processing system for reproducing the first copyrighted work data, and new data are generated from the first additional data and the second additional data. 37. The data reproducing apparatus according to claim 36, wherein a second processing system that performs predetermined signal processing on the second copyrighted work data using data and reproduces the processed copyrighted data is used. 38. The predetermined signal processing is a processing of decrypting the second copyrighted work data using new data generated as a decryption key for decrypting a cipher. 37. The data reproducing device according to 37. 39. A data reproducing method for reproducing at least two copyrighted data recorded in two areas physically separated via a boundary portion, wherein each of the copyrighted data added to each copyrighted data is A data reproducing method comprising: reproducing the additional data from the different areas; and controlling the reproduction of the at least two copyrighted work data using the additional data. 40. The at least two copyrighted work data and their additional data are respectively reproduced from the different areas, new additional data is generated based on the additional data, and at least one of the additional data is generated by using the new additional data. 40. The data reproducing method according to claim 39, wherein one copyrighted data is subjected to predetermined signal processing and reproduced, and the other copyrighted data is also reproduced. 41. Data of the first literary work data and the first additional data added to the literary work data, and the second literary work data and the second additional data added to the literary work data When reproducing from two areas of the recording medium, a first processing step of reproducing the first copyrighted work data; and generating new data from the first additional data and the second additional data. 42. The data reproducing method according to claim 40, further comprising a second processing step of performing predetermined signal processing on the copyrighted work data using data and reproducing the processed copyrighted data. 42. The predetermined signal processing is a processing of decrypting the second copyrighted work data using new data generated as a decryption key for decrypting a cipher. 41. The data reproducing method according to 41.