JPH11102572A - Recording device, reproduction device, recording / reproduction device, data transmission device, and recording medium - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a device which can be reproduced only by a specific recording device and a reproducing device, and a recording / reproducing device which permits only self-recording / playback, in order to protect copyrights and the like. The purpose is to do. SOLUTION: A recording / reproducing apparatus according to the present invention includes: an encrypting unit 1103 for encrypting data according to a key based on identification information unique to the device; a recording unit 1104 for recording and processing the encrypted data; A reproducing unit 1105 for reproducing the recorded data, and a decryption unit 1106 for decrypting the recorded data according to a key based on identification information unique to the apparatus.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an apparatus for recording a signal on a recording medium, an apparatus for reproducing a recording medium, an apparatus for recording and reproducing, a data transmitting apparatus, and a recording medium.

[0002]

2. Description of the Related Art As a device for recording and reproducing digital data such as a video signal or an audio signal on a recording medium, digital recording and reproducing devices such as a digital video tape recorder, a digital video disk (hereinafter referred to as a DVD) and an MD have been commercialized. I have.

The recording capacity of a DVD is 4.7 for single-sided, single-layer recording.
Large capacity such as GB (maximum 17 GB by double-sided double-layer recording), and 11 Mbps for user data
A high transfer rate is realized. With this large capacity and high transfer rate, a high quality video signal and a high sound quality audio signal can be reproduced.

[0004] DVDs use the MPEG2 encoding system, which is an international standard for image encoding, for recording video signals. For the audio signal, a compression method such as linear PCM or AC3 or MPEG audio is adopted.

A recordable DVD is also a DVD-RAM.
It has been proposed as. This means that the recording capacity is 2.7 GB
And the data transfer rate is 11 Mbps as in the case of DVD.

With the realization of such a recordable recording medium having a large capacity and a high transfer rate, a demand for recording high-quality video data or high-quality audio data on a recording medium is increasing. is there.

However, since it is possible to freely record high-quality video data or high-quality audio data, there is a problem that copyright infringement of each data is infringed. . This is because digital copying can be performed without deterioration.

As a copy protection method for analog signals, there is a method by Macrovision Corporation. This means that only a deteriorated video signal can be recorded by inserting a special signal pattern during the blanking period of the video signal to disrupt the AGC of a VTR such as a VHS.

As a method for limiting the number of times (generation) of copying, CGMS (Copy Generation) is used.
Management System). This is represented by a 2-bit code,
(0,0) indicates that there is no copy restriction, (1,0) indicates that one generation of copying is possible, and (1,1) indicates that copying is not possible. For example,
When the data of (1, 0) is copied, the CGMS of the copied data is rewritten to (1, 1), so that it is not allowed to copy again based on the copied data.

[0010] Further, a system has been proposed in which only a specific device having a key for encrypting data and decrypting the data can decrypt the data.

[0011] Further, the unique identification information of the device that recorded the data is recorded on a recording medium, and if the identification information cannot be extracted from the recording medium, the recording / reproducing method for stopping the reproduction of the data, or a recording / reproducing method. In addition to recording the unique identification information, it is encrypted and recorded with a key according to this identification information, and the recorded identification information is read during reproduction,
A recording / reproducing method has been proposed in which encryption is decrypted using a key according to read identification information (Japanese Patent Laid-Open No. Hei 9-115241).

[0012]

However, if encrypted data is recorded in accordance with the identification information unique to the recording device, and this identification information is recorded on a recording medium, the identification information recorded at the time of reproduction will become invalid. However, there is a problem in that an encryption key may be generated, and copyright infringement occurs.

In the case of recording the identification information unique to the recording device and controlling the reproduction based on whether the identification information can be extracted at the time of reproduction, if the recording medium is recorded by a proper recording device, the identification information is used. Can be extracted, so that data can be reproduced by a plurality of reproduction devices. In other words, if a large amount of illegal copies are made using an authorized recording device, copyright infringement is caused.

Accordingly, the present invention provides a recording device and a reproducing device which can be reproduced only by a reproducing device associated with the recording device for protection of copyright and the like, and which can perform only self-recording / reproducing processing. Provided are a recording / reproducing apparatus, a recording apparatus for generating a recording medium for restricting an apparatus for reproducing a duplicated recording medium, a data transmitting apparatus, and a recording medium for restricting a reproduction process of the duplicated recording medium. The purpose is to:

[0015]

According to the present invention, there is provided a recording apparatus for recording data on a recording medium, comprising: means for generating a key based on unique identification information of the recording apparatus; And a recording unit for recording the recording data on the recording medium.

[0016] Further, there is provided means for detecting attribute information of the data, and the encrypting means is configured to perform an encryption process according to the attribute information.

Further, the apparatus is configured to record the attribute information in a predetermined area of the recording medium.

Further, the attribute information is configured to be information indicating that the data includes at least either video data or audio data.

The attribute information is configured to include at least copy permission information on the data.

Further, the attribute information includes at least copyright information on the data.

[0021] Further, it is configured that encryption discrimination information indicating that the encryption processing has been performed by the encryption means is recorded in a predetermined area of the recording medium.

The present invention also relates to a reproducing apparatus for reproducing data recorded on a recording medium, comprising: means for generating a key based on identification information unique to the reproducing apparatus; It comprises a reading means and a decryption means for decrypting the data based on the key.

[0023] Further, there is provided means for detecting attribute information of the data, and the decryption means is configured to perform decryption processing in accordance with the attribute information.

The apparatus further comprises means for reading attribute information of the data recorded in a predetermined area of the recording medium,
The decryption means is configured to decrypt the data according to the attribute information.

Further, the attribute information is configured to be information indicating that the data includes at least either video data or audio data.

The attribute information is configured to include at least copy permission information on the data.

Further, the attribute information is configured to include at least copyright information on the data.

The attribute information may include at least a mode in which, when the data is reproduced and recorded using a predetermined recording device, reproduction is permitted only by a reproduction device associated with the predetermined recording device. It is composed.

Further, the attribute information is configured to include at least a mode in which when the data is reproduced and recorded using a predetermined recording / reproducing apparatus, reproduction is permitted only by the predetermined recording / reproducing apparatus. is there.

Further, the apparatus further comprises means for reading the encryption discrimination information recorded in a predetermined area of the recording medium and discriminating that the data is encrypted. If the data is encrypted, The decryption means is configured to perform decryption processing of the data.

The present invention also relates to a reproducing apparatus for reproducing data recorded on a recording medium, comprising means for reading recording apparatus identification information for specifying the recording apparatus which has recorded the data recorded on the recording medium. And an identification information comparing unit for comparing the recording device identification information with reproduction device identification information unique to the reproduction device; and a reproduction unit for reading data from the recording medium and reproducing the data. When the device identification information does not match the playback device identification information, the data playback process is stopped.

Further, the apparatus further comprises means for detecting attribute information of the data, and controls a comparison process between the recording device identification information and the reproduction device identification information and a data reproduction process according to the detected attribute information. It is what was constituted.

The apparatus further comprises means for reading attribute information of the data recorded in a predetermined area of the recording medium,
According to the read attribute information, a comparison process between the recording device identification information and the reproduction device identification information and a data reproduction process are controlled.

Further, the attribute information is configured to be information indicating that the data includes at least either video data or audio data.

The attribute information is configured to include at least copy permission information on the data.

The attribute information is configured to include at least copyright information on the data.

The attribute information may include at least a mode in which, when the data is reproduced and recorded using a predetermined recording device, reproduction is permitted only by a reproduction device associated with the predetermined recording device. It is composed.

The attribute information is configured to include at least a mode in which, when the data is reproduced and recorded using a predetermined recording / reproducing apparatus, reproduction is permitted only by the predetermined recording / reproducing apparatus. is there.

The present invention also relates to a recording and reproducing apparatus for recording and reproducing data on and from a recording medium, comprising: means for generating a key based on identification information unique to the recording and reproducing apparatus; An encryption unit that performs encryption processing based on information and outputs recording data; a recording unit that records the recording data on the recording medium; a unit that reproduces data from the recording medium and outputs reproduction data; Decryption means for decrypting the reproduction data based on the key information.

Further, there is provided means for detecting data attribute information, and the encryption means is configured to perform an encryption process according to the attribute information.

The apparatus further comprises means for detecting attribute information of the reproduced data, and the decryption means is configured to perform decryption processing in accordance with the attribute means.

[0042] The attribute information is recorded in a predetermined area of the recording medium.

The apparatus further comprises means for reading out the attribute information recorded in the predetermined area, wherein the decryption means performs decryption processing according to the attribute information.

The attribute information is configured to be information indicating that the data includes at least either video data or audio data.

Further, the attribute information is configured to include at least copy permission information on the data.

The attribute information is configured to include at least copyright information on the data.

The attribute information may include at least a mode in which, when the data is reproduced and recorded using a predetermined recording device, reproduction is permitted only by a reproducing device associated with the predetermined recording device. It is composed.

Further, the attribute information is configured to include at least a mode in which, when the data is reproduced and recorded using a predetermined recording / reproducing apparatus, reproduction is permitted only by the predetermined recording / reproducing apparatus. is there.

The attribute information may include at least a mode in which, when the data is reproduced and recorded using a predetermined recording device, reproduction is permitted only by a reproducing device associated with the predetermined recording device. It is composed.

The attribute information is configured to include at least a mode in which, when the data is reproduced and recorded using a predetermined recording / reproducing apparatus, reproduction is permitted only by the predetermined recording / reproducing apparatus. is there.

Further, the apparatus is configured to record encryption discrimination information indicating that the encryption processing has been performed by the encryption means in a predetermined area of the recording medium.

The apparatus further comprises means for reading the encryption discrimination information recorded in the predetermined area to determine that the reproduction data is encrypted. If the reproduction data is encrypted, The decryption means is configured to perform decryption processing of the reproduced data.

The present invention also relates to a recording / reproducing apparatus for recording and reproducing data on a recording medium, comprising: means for recording identification information unique to the recording / reproducing apparatus on a recording medium; and storing the data on the recording medium. Recording means for recording; means for reading the identification information from the recording medium and outputting reproduction identification information; means for comparing the reproduction identification information with the identification information; and reproducing data from the recording medium to reproduce the reproduction data. Means for outputting, when the reproduction identification information does not match the identification information, reproduction of the data is stopped.

Further, the apparatus further comprises means for detecting attribute information of the data, and controls a comparison process between the recording device identification information and the reproduction device identification information and a data reproduction process according to the detected attribute information. It is what was constituted.

The apparatus further comprises means for recording the attribute information of the data in a predetermined area of a recording medium, and means for reading the attribute information recorded in the predetermined area. It is configured to control a comparison process between the recording device identification information and the reproduction device identification information and a data reproduction process.

Further, the attribute information is configured to be information indicating that the data includes at least either video data or audio data.

The attribute information is configured to include at least copy permission information on the data.

Further, the attribute information is configured to include at least copyright information on the data.

The attribute information may include at least a mode in which, when the data is reproduced and recorded using a predetermined recording device, reproduction is permitted only by a reproduction device associated with the predetermined recording device. It is composed.

The attribute information is configured to include at least a mode in which, when the data is reproduced and recorded using a predetermined recording / reproducing apparatus, reproduction is permitted only by the predetermined recording / reproducing apparatus. is there.

[0061]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a recording apparatus, a reproducing apparatus, a recording / reproducing apparatus, a data transmitting apparatus, and a recording medium according to the present invention. The recording medium may be any medium such as an optical disk, a magnetic disk, or a magnetic tape.

First, a first embodiment of the recording apparatus of the present invention will be described with reference to FIG. FIG. 1 is a block diagram of the recording apparatus of the present embodiment.

As shown in FIG. 1, the recording apparatus of this embodiment
It comprises an identification signal generator 1, a key generator 2, an encryption processor 3, and a recording processor 4, and records data on a recording medium 5. The identification signal generator 1 generates identification information unique to the recording device. The key generator generates a key for the encryption process based on the identification information. Therefore, a key unique to the recording device is generated. The encryption processor 3 encrypts input data according to the generated key. In the encryption processing, data may be rearranged based on a certain rule, or a predetermined conversion may be performed. After adding an additional code for error correction to the encrypted data, the recording processor 4 performs predetermined modulation and records the data on the recording medium 5.

By performing the encryption processing unique to the recording apparatus as described above, the data recorded on the recording medium 5 can be reproduced only by a specific reproducing apparatus, and thus the copyright of the data can be protected. Also, the identification information of the recording device,
Alternatively, since the encryption key is not recorded on the recording medium 5, unauthorized decryption on the reproducing side can be prevented, and copyright and the like can be more strongly protected.

Further, since reproduction can be performed by using a reproducing apparatus having specific identification information associated with the identification information of the recording apparatus, the right of the user to perform time-shift reproduction can be protected.

Next, a second embodiment of the recording apparatus of the present invention will be described with reference to FIG. FIG. 2 is a block diagram of a recording apparatus according to the present embodiment. As in the first embodiment, the recording apparatus includes an identification signal generator 1, a key generator 2, an encryption processor 3, and a recording processor 4. Attribute information detector 201, switch 202,
A switch 207 is provided.

As in the first embodiment, the encryption processor 3 encrypts input data with a key based on identification information unique to the recording device. However, the attribute of the input data is detected by the attribute information detector 201, and the input data is encrypted according to the attribute information. In other words, it is determined whether or not the data requires encryption processing based on the attribute information of the data.
02 is connected to terminal 203 and switch 207 is connected to terminal 2
05, the input data is encrypted. When recording data that does not need to be encrypted, the switch 202 is connected to the terminal 204 and the switch 207 is connected to the terminal 206, and the recording process is performed without performing the encryption process.

As an example of the attribute information, information indicating that the input data is copyrighted data may be detected as the attribute information. According to this copyright information, encryption processing is performed when recording copyrighted data, and when recording data that is not copyrighted, recording processing is performed without encryption processing. This may be achieved by detecting copyright information included in the header information or the like of the input data.

Further, when information such that the input data includes a video signal or an audio signal is detected as attribute information, and when input data including at least one of these signals is recorded and processed, encryption of the input data is performed. A conversion process may be performed. On the other hand, when neither the video signal nor the audio signal is included, the recording process is performed without performing the encryption process.

The encryption process may be performed by recognizing that the type of input data is specific data such as document data or an application program, regardless of the type of video or audio signal.

It is also possible to detect the copy permission information relating to the input data as attribute information, and to select whether or not to perform the encryption processing in accordance with the information. For example, in the case of data for which copying is permitted, recording processing is performed without encryption processing, and when only the first generation copy is permitted, encryption processing may be performed. If copying is not permitted at all, the recording process itself may be stopped. When only the first generation copy is permitted, the copy permission information may be rewritten so that the mode is set to a mode in which the copy is not permitted at the same time as performing the encryption processing and recording. This makes it possible to prevent the creation of a copy based on the recorded recording medium.

Also, even when copying is prohibited, the data may be recorded after being encrypted. As a result, the copied data can be played back only on a specific playback device, so that a large number of the copied data does not go out, so that it is possible to protect the copyright etc. Can be provided to users.

Further, information indicating that only the self-recording / reproducing process is permitted is detected as attribute information, and if only the self-recording / reproducing process is permitted, an encryption process may be performed.

Further, information indicating that reproduction is permitted only to the reproduction apparatus associated with the apparatus that has recorded and processed the data is detected as attribute information. If the reproduction apparatus is restricted in this way, encryption is performed. It should be processed.

In the case of data attributes for which copying is prohibited but self-recording / reproducing is permitted, the data may be recorded after encryption processing. This makes it possible to realize a recording mode in which recording for duplication is prohibited but time-shift reproduction is possible.

As described above, by performing the encryption process in accordance with the attribute information of the data, only the data that needs copyright protection can be encrypted, and the data recording with the copyright protected is realized. be able to.

Further, since the data recorded on the recording medium 5 can be reproduced only by a specific reproducing device by performing the encryption processing unique to the recording device, it is possible to protect the copyright of the data. it can. Further, since the identification information of the recording device or the information related to the encryption processing such as the encryption key is not recorded on the recording medium 5, it is possible to prevent unauthorized decryption on the reproduction side, and to further strengthen the copyright. Can be protected.

Further, since reproduction can be performed by using a reproduction apparatus having specific identification information associated with the identification information of the recording apparatus, the right of the user to perform time-shift reproduction can be protected.

Next, a third embodiment of the recording apparatus of the present invention will be described with reference to FIG. FIG. 3 is a block diagram of a recording apparatus according to the present embodiment, which is almost the same as the second embodiment, except for the operations of the attribute information detector 301 and the recording processor 302.

The attribute information detector 301 controls the switches 202 and 207 and the encryption processor 3 so as to select whether or not to perform encryption processing according to the attribute information of the input data.
And outputs attribute information. The output attribute information is recorded by the recording processor 302 together with the data on the recording medium 300.

As described above, by creating the recording medium 300 on which the attribute information of the input data is recorded, the recording medium 3
At the time of reproduction of 00, by reading the attribute information recorded on the recording medium 300, it is possible to easily detect whether the recorded data is data that has been subjected to encryption processing.

For the attribute information, the copyright processing, data type information, copy permission information, etc., as described in the second embodiment of the recording apparatus of the present invention, are detected as attribute information and encryption processing is performed. What is necessary is to control.

Further, since the data recorded on the recording medium 300 can be reproduced only by a specific reproducing device by performing the encryption processing unique to the recording device, the copyright of the data can be protected. it can. Also, since information regarding the encryption processing such as the identification information of the recording device or the encryption key is not recorded on the recording medium 300, unauthorized decryption on the reproducing side can be prevented, and copyright and the like can be more strongly protected. Can be protected.

Furthermore, since reproduction can be performed by using a reproducing apparatus having specific identification information associated with the identification information of the recording apparatus, the right of the user to perform time-shift reproduction can be protected.

Next, a fourth embodiment of the recording apparatus of the present invention will be described with reference to FIG. FIG. 4 is a block diagram of a recording apparatus according to the present embodiment, which is almost the same as the third embodiment, except for the operations of the attribute information detector 401 and the recording processor 402.

The attribute information detector 301 outputs an encryption discrimination information signal for deciding whether or not to perform an encryption process according to the attribute information of the input data. The switches 202 and 207 and the encryption processor 3 are controlled according to the encryption discrimination information signal, and this encryption discrimination information signal is also recorded on the recording medium 400 in accordance with the data.

As described above, by creating the recording medium 400 on which the encryption discrimination information signal indicating whether the encryption processing has been performed prior to the recording processing, the recording medium 40
At the time of reproduction of 0, by reading the encryption discrimination information recorded on the recording medium 400, it is possible to easily detect whether the recorded data is data that has been subjected to encryption processing.

For the attribute information, the copyright information, data type information, copy permission information, etc., as described in the second embodiment of the recording apparatus of the present invention, are detected as attribute information and encryption processing is performed. What is necessary is to control.

Also, by performing encryption processing unique to the recording device, the data recorded on the recording medium 400 can be reproduced only by a specific reproducing device, so that the copyright of the data can be protected. it can. Also, since information related to the encryption process such as the identification information of the recording device or the encryption key is not recorded in the recording medium 400, unauthorized decryption on the reproduction side can be prevented, and copyright and the like can be more strongly protected. Can be protected.

Furthermore, since reproduction can be performed by using a reproducing apparatus having specific identification information associated with the identification information of the recording apparatus, the right of the user to perform time-shift reproduction can be protected.

Next, a first embodiment of the reproducing apparatus of the present invention will be described with reference to FIG. FIG. 5 is a block diagram of the reproducing apparatus according to the present embodiment.
02, a key generator 503, and a decryptor 504 for reproducing data from the recording medium 500.

First, the reproduction processor 501 is connected to the recording medium 500.
The reproduction processing such as demodulation and error correction of the data recorded in the data is performed, and reproduced data is output. On the other hand, the identification signal generator generates identification information unique to the playback device,
The key generator 502 generates a key in the encryption processing based on the identification information. Therefore, a key unique to the playback device is generated. The decryption device 504 decrypts the reproduced data according to the generated key.

As described above, by performing the decryption based on the key unique to the reproducing apparatus, only the data permitted to the reproducing apparatus can be decrypted, and the copyright of the data can be protected.

Further, since the decryption information such as the identification signal unique to the recording device or the encryption key is not recorded on the recording medium, the reproducing device may read the decryption information from the recording medium. It is not possible to realize stronger protection of copyright and the like.

Further, since the recording medium recorded by the recording device having the specific identification information associated with the identification information of the reproduction device can be reproduced, the user has the right to perform the time-shift reproduction. Can also be protected.

Next, a second embodiment of the reproducing apparatus of the present invention will be described with reference to FIG. FIG. 6 is a block diagram of the reproducing apparatus according to the present embodiment. As in the first embodiment of the reproducing apparatus according to the present invention, a reproducing processor 501, an identification signal generator 502, a key generator 503, and a decryptor are provided. 504, and further comprises an attribute information detector 601 and switches 602 and 607.

In the decryption process, as in the first embodiment of the playback device, the decryption process of the playback data is performed using a key unique to the playback device. However, the attribute information detector 601 detects the attribute information of the data recorded on the recording medium 600, and executes the decryption processing according to the attribute information.
Decide not to do it. That is, by detecting the attribute information, it is determined whether or not the recorded data is encrypted data. When reproducing the encrypted data, the switch 602 is connected to the terminal 603, and the switch 607 is connected. Is connected to a terminal 605 to perform a decryption process. On the other hand, in the case of data that has not been encrypted, the switch 602 is connected to the terminal 604 and the switch 607
Is connected to the terminal 606.

As described above, the decryption process can be selectively performed by detecting the attribute information of the recorded data.

As an example of attribute information, information indicating that recorded data is copyrighted data may be detected as attribute information. Based on this copyright information, when reproducing copyrighted data, it is determined that the recorded data has been encrypted, and decryption processing is performed. When data other than that is reproduced, decryption processing is performed. Play as it is.

Further, information indicating that the recording data contains a video signal or an audio signal is detected as attribute information, and when the recording data containing at least one of these signals is reproduced, the recording data May be determined to have been encrypted, decrypted and then reproduced. On the other hand, when neither the video signal nor the audio signal is included, the reproduction is performed without performing the decryption processing.

The encryption process may be performed by recognizing that the type of input data is specific data such as document data or an application program, regardless of the type of video or audio signal.

Further, it is also possible to detect duplication permission information relating to the recorded data as attribute information, and to select whether or not to execute the decryption processing in accordance with the attribute. For example, if the data is permitted to be copied, or if the first generation copy is permitted, it is determined that the encryption process has not been performed, and the data is reproduced without performing the decryption process. On the other hand, if copying is not permitted at all, it is determined that the data on the recording medium has been encrypted and recorded, and decryption processing is performed. However, the present invention is not limited to this, and the decryption process may be performed even when the first generation copy is permitted.

Information indicating that only the self-recording / reproducing process is permitted is detected as attribute information. If only the self-recording / reproducing process is permitted, the recorded data is encrypted. It is only necessary to judge that there is a decryption process.

Further, information indicating that reproduction is permitted only to the reproduction apparatus associated with the apparatus that has processed the data recording is detected as attribute information. It is determined that the data that has been encrypted has been subjected to the encryption processing, and the decryption processing may be performed.

In the case where the copying is prohibited but the self-recording / reproducing is permitted, the recorded data may be determined to be encrypted, and the decryption processing may be performed.

As described above, by performing the decryption processing in accordance with the attribute information of the data, only the data that has been subjected to the encryption processing as data requiring protection such as copyright can be decrypted. And the like can be realized.

[0107] Further, since the reproducing apparatus performs the decryption based on the unique key, only the data permitted to the reproducing apparatus can be decrypted. Furthermore, since information related to decryption such as an identification signal unique to the recording device or a key for the encryption process is not recorded in the recording medium, the information related to decryption cannot be read from the recording medium on the playback device side, Stronger protection such as copyright can be realized.

Further, since a recording medium recorded by a recording device having specific identification information associated with the identification information of the reproduction device can be reproduced, the user has the right to perform time-shift reproduction. Can also be protected.

Next, a third embodiment of the reproducing apparatus of the present invention will be described with reference to FIG. FIG. 7 is a block diagram of a reproducing apparatus according to the present embodiment, which has the same configuration as the reproducing apparatus according to the second embodiment of the present invention, but differs in the operation of the attribute information detector 701. The attribute information detector 701 reads the attribute information recorded on the recording medium 700, and determines whether to perform the decryption processing according to the read attribute information.

As a result, the attribute information of the recorded data can be easily detected, and whether the recorded data is encrypted or not is detected from the detected attribute information, and decryption is performed accordingly. Processing can be selectively performed.

For the attribute information, the copyright information, data type information, copy permission information, etc. as described in the second embodiment of the reproducing apparatus of the present invention are detected as attribute information and encryption processing is performed. What is necessary is to control.

Further, since the reproducing apparatus performs the decryption based on the unique key, only the data permitted to the reproducing apparatus can be decrypted. Furthermore, since information related to decryption such as an identification signal unique to the recording device or a key for the encryption process is not recorded in the recording medium, the information related to decryption cannot be read from the recording medium on the playback device side, Stronger protection such as copyright can be realized.

Furthermore, since a recording medium recorded by a recording device having specific identification information associated with the identification information of the reproduction device can be reproduced, the user has the right to perform time-shift reproduction. Can also be protected.

Next, a fourth embodiment of the reproducing apparatus of the present invention will be described with reference to FIG. FIG. 8 is a block diagram of the present embodiment, which has the same configuration as that of the third embodiment of the reproducing apparatus of the present invention, except that an encryption discriminator 801 is provided. The encryption discriminator 801 detects whether or not recorded data has been subjected to an encryption process, and determines the necessity of decryption. Therefore, when reproducing encrypted data, perform decryption processing,
Otherwise, the reproduction data is output without performing the decryption processing.

As described above, the necessity of the decryption process can be easily determined by detecting the information as to whether or not the encryption has been performed.

Further, since the reproducing apparatus performs the decryption based on the unique key, only the data permitted to the reproducing apparatus can be decrypted. Furthermore, since information related to decryption such as an identification signal unique to the recording device or a key for the encryption process is not recorded in the recording medium, the information related to decryption cannot be read from the recording medium on the playback device side, Stronger protection such as copyright can be realized.

Furthermore, since the recording medium recorded by the recording device having the specific identification information associated with the identification information of the reproduction device can be reproduced, the user has the right to perform time-shift reproduction. Can also be protected.

Next, a fifth embodiment of the reproducing apparatus of the present invention will be described with reference to FIG. FIG. 9 is a block diagram of the present embodiment, in which an identification signal generator 901, an identification signal detector 902,
This is a playback device including a comparator 903 and a playback processor 904. Here, the recording medium 900 records the recorded data and identification information unique to the recording device used for recording the data.

The identification signal detector 902 detects the identification information unique to the recording device used for recording the recording data as the recording device identification information. The identification signal generator 901 generates identification information unique to the playback device as playback device identification information. The comparator 903 compares the recording device identification information with the reproduction device identification information and outputs the result.

The reproduction processor 904 performs data reproduction processing in accordance with the comparator 903. If the recording device identification information and the reproduction device identification information match, the reproduction processor 904 performs data reproduction processing. Stop processing.

As described above, by comparing the identification information of the recording device with the identification information of the reproducing device and controlling the reproducing process, the reproducing process can be performed only by the combination of the predetermined recording device and the reproducing device. Therefore, it is possible to prevent the illegally recorded data from being reproduced by an unspecified reproducing device, and to protect copyrights and the like.

According to the present invention, the reproduction control is not performed according to whether or not the identification information of the recording device can be extracted as described in the section of the prior art, but the identification information of the recording device and the identification information unique to the reproduction device are used. By performing the reproduction control in comparison, it is possible to specify the reproduction apparatus that reproduces the recording medium, and it is possible to perform stronger protection such as copyright.

Further, since a recording medium recorded by a recording device having specific identification information associated with the identification information of the reproduction device can be reproduced, the user has the right to perform time-shift reproduction. Can also be protected.

Next, a sixth embodiment of the reproducing apparatus of the present invention will be described with reference to FIG. FIG. 10 is a block diagram of the reproducing apparatus of the present embodiment, which has the same configuration as that of the fifth embodiment, but further includes an attribute information detector 1001.
Further, the operation of the comparator 1002 is different.

An attribute information detector 1001 detects attribute information of recorded data. The comparator 1002 controls the playback processor 904 by comparing the identification information unique to the playback device with the identification information unique to the recording device used for data recording according to the attribute information of the detected data. That is, it is determined whether or not the reproduction control needs to be performed based on the attribute information of the data. Therefore, when reproducing data for which reproduction control needs to be performed, the recording device identification information and the reproduction device identification information are compared, and if they match, the reproduction process is executed. If not, the reproduction process is stopped. . On the other hand, when reproducing data that does not require the reproduction control, the data read from the recording medium is directly reproduced without performing the comparison processing of the identification information of the recording device and the reproduction device.

It should be noted that the attribute information may be the same as the information described in the second embodiment of the reproducing apparatus of the present invention, and copyright information, data type information, copy permission information, etc. may be used as attribute information. Detection may be performed and reproduction control may be performed.

As described above, by controlling the reproducing process by comparing the identification information of the recording device and the identification information of the reproducing device in accordance with the attribute information, depending on the attribute of the data, the predetermined recording device and the reproducing device can be connected. Since the reproduction process is performed only in the combination, it is possible to prevent the illegally recorded data from being reproduced by an unspecified reproduction device.

Further, as described in the section of the related art, the reproduction control is not performed based on whether or not the identification information of the recording device can be extracted. Instead, the identification information of the recording device is compared with the identification information unique to the reproduction device. By performing the playback control, it is possible to specify a playback device that plays back the recording medium, and to provide a device that realizes stronger protection such as copyright.

Further, since a recording medium recorded by a recording device having specific identification information associated with the identification information of the reproduction device can be reproduced, the user has the right to perform time-shift reproduction. Can also be protected.

Next, a first embodiment of the recording / reproducing apparatus of the present invention will be described with reference to FIG. FIG. 11 is a block diagram of the recording / reproducing apparatus of the present embodiment.
1. Key generator 1102, encryption processor 1103, recording processor 1104, reproduction processor 1105, decryptor 1106
And a device for recording and reproducing data on the recording medium 1100.

The identification signal generator 1101 generates identification information unique to the recording / reproducing apparatus. The key generator 1102 generates a key for the encryption process based on the identification information. That is, a key unique to the recording / reproducing device is generated. Cryptographic processor 1103
Performs encryption processing according to the key that generated the input data. The recording processor 1104 records the encrypted data on the recording medium 1100. The reproduction processor 1105 reads data from the recording medium 1100. Decryptor 1106
Decrypts the read data according to the key generated by the key generator 1102.

As described above, by performing the encryption processing unique to the recording / reproducing apparatus and recording it on the recording medium, the data can be decrypted only by the recording / reproducing apparatus used for the recording processing. That is, only the self-recording / reproduction by the recording / reproducing apparatus can be performed. As described above, by preventing reproduction by another recording / reproducing device or reproducing device, illegal duplication of data can be prevented, and copyright and the like can be protected.

Further, since the identification information unique to the recording / reproducing apparatus is not recorded on the recording medium, it is not possible to obtain the information in the encryption processing from the recording medium, it is possible to prevent the illegal reproduction processing, and to obtain a stronger power. Copyright protection can be realized.

Further, since the self-recording / reproducing process by the recording / reproducing apparatus of this embodiment is possible, the right of the user to perform time-shift reproduction can be protected.

Next, a second embodiment of the recording / reproducing apparatus of the present invention will be described with reference to FIG. FIG. 12 is a block diagram of the recording / reproducing apparatus of the present embodiment.

In the recording / reproducing apparatus of the present embodiment, as in the first embodiment of the recording / reproducing apparatus of the present invention, in the recording process, after the encryption processing is performed based on the identification information unique to the recording / reproducing apparatus. A recording process is performed, and in a reproducing process, a decryption process is performed on the basis of identification information unique to the recording / reproducing apparatus. However, a first attribute detector 1214 for detecting attribute information of data, a second attribute detector 1207 for detecting attribute information of reproduced data, and switches 1201, 1
The present embodiment differs from the first embodiment of the recording / reproducing apparatus in that the recording / reproducing apparatus includes the recording / reproducing apparatuses 206, 1208, and 1213.

The first attribute information detector 1214 detects the attribute information of the input data, and determines whether or not an encryption process is necessary. If you need encryption,
The switch 1201 is connected to the terminal 1202, and the switch 1206 is connected to the terminal 1204, and the input data is encrypted. When recording data that does not need to be encrypted, the switch 1201 is connected to the terminal 1203, and the switch 1206 is connected to the terminal 1205.
Recording processing is performed without performing encryption processing.

Also, the second attribute information detector 1207
Detects the attribute information of the recorded data to be played,
Thus, it is determined whether or not the recording data is encrypted data, and it is determined whether to perform the decryption processing. If the data is encrypted, the switch 1208 is connected to the terminal 1209 so as to perform a decryption process.
Reference numeral 213 is connected to the terminal 1211 to perform encryption decryption processing. Also in this case, similarly to the first embodiment of the recording / reproducing apparatus of the present invention, decryption is performed according to a key generated based on identification information unique to the recording / reproducing apparatus. On the other hand, in the case of recorded data that has not been encrypted, the switch 1208 is connected to the terminal 1210, and the switch 1213 is connected to the terminal 1212, so that the data is reproduced without being decrypted.

Examples of the attribute information include copyright information, data type information, and the like described in the second embodiment of the recording apparatus of the present invention or the second embodiment of the reproducing apparatus of the present invention.
Copy permission information or the like may be detected as attribute information, and an encryption process or a decryption process may be performed according to the attribute information.

As described above, by performing the encryption process and the decryption process in accordance with the attribute information of the data, only the data that needs copyright protection can be encrypted.
Data recording / reproduction with copyright protection can be realized.

Further, since data encrypted by a key unique to the recording / reproducing apparatus is recorded, it cannot be decrypted by another recording / reproducing apparatus or reproducing apparatus, so that copyright and the like must be protected. Can be.

Further, since the identification information unique to the recording / reproducing apparatus is not recorded on the recording medium, it is not possible to obtain the information in the encryption processing from the recording medium, it is possible to prevent the illegal reproduction processing, and to achieve a higher power. Copyright protection can be realized.

Further, since the self-recording / reproducing process by the recording / reproducing apparatus of this embodiment is possible, the right of the user to perform time-shift reproduction can be protected.

Next, a third embodiment of the recording / reproducing apparatus of the present invention will be described with reference to FIG. FIG. 13 is a block diagram of a recording / reproducing apparatus of this embodiment, which has the same configuration as that of the second embodiment of the recording / reproducing apparatus of the present invention, except that a first attribute information detector 1301 and a recording processor 1302 and the operation of the second attribute information detector 1303 are different.

The first attribute information detector 1301 detects the attribute information of the input data, and determines whether or not to encrypt the input data with a key based on a unique identification signal according to the attribute information. Also outputs data attribute information. The recording processor 1302 records the data and also records the attribute information on the recording medium 1300.

The second attribute information detector 1303 reads the attribute information recorded on the recording medium 1300, determines whether or not the recorded data has been encrypted, and determines whether or not to perform the decryption processing. I do.

As described above, the attribute information of the recording data is easily recognized by recording the attribute information of the data on the recording medium 1300 in the recording process, and by reading the attribute information from the recording medium 1300 in the reproducing process. Therefore, it is possible to easily determine whether to execute the encryption decryption process.

Also, since data encrypted with a key unique to the recording / reproducing apparatus is recorded, it cannot be decrypted by another recording / reproducing apparatus or reproducing apparatus, so that copyright or the like must be protected. Can be.

Further, since the identification information unique to the recording / reproducing apparatus is not recorded on the recording medium, it is not possible to obtain the information in the encryption processing from the recording medium, it is possible to prevent the illegal reproduction processing, and to achieve a higher power. Copyright protection can be realized.

Further, since the self-recording / reproducing process by the recording / reproducing apparatus of this embodiment is possible, the right of the user to perform time-shift reproduction can be protected.

Examples of the attribute information include copyright information, data type information, and the like as described in the second embodiment of the recording apparatus of the present invention or the second embodiment of the reproducing apparatus of the present invention. Copy permission information or the like may be detected as attribute information, and an encryption process or a decryption process may be performed according to the attribute information.

Next, a fourth embodiment of the recording / reproducing apparatus of the present invention will be described with reference to FIG. FIG. 14 is a block diagram of a recording / reproducing apparatus of this embodiment, which has the same configuration as that of the third embodiment of the recording / reproducing apparatus of the present invention. The difference is that an operation 1402 and an encryption discriminator 1403 in the reproducing process are provided.

In the recording process, the attribute information detector 140
1 outputs an encryption discrimination information signal for deciding whether to execute the encryption process in accordance with the attribute information of the input data. Switch 120 according to the encryption discrimination information signal
8, 1206 and the encryption processor 1103, and the recording processor 1402 records this encryption discrimination information signal on the recording medium 1400 along with the data.

In the reproducing process, the encryption discriminator 1403 detects the encryption discrimination information signal recorded on the recording medium 1400, and discriminates whether the recorded data is data that has been subjected to encryption processing. When the encryption processing has been performed, the switches 1208 and 1213 and the decryptor 1106 are controlled to perform the decryption processing.

As described above, by recording the encryption discrimination information signal indicating whether or not the encryption processing has been performed in the recording process, the recorded encryption discrimination information is read out in the reproduction process, thereby recording the data. It is possible to easily detect whether or not the encrypted data is encrypted data.

Further, by performing an encryption process unique to the recording device, the data recorded on the recording medium 1400 cannot be easily read, and the copyright of the data can be protected. Further, identification information of the recording device or information relating to the encryption processing such as an encryption key is stored in the recording medium 1.
Since the information is not recorded in 400, unauthorized decryption on the reproduction side can be prevented, and copyright and the like can be more strongly protected.

Further, since the self-recording / reproducing process by the recording / reproducing apparatus of this embodiment is possible, the right of the user to perform the time-shift reproduction can be protected.

As examples of the attribute information, the copyright information, the data type information, the copy permission information and the like as described in the second embodiment of the recording apparatus of the present invention are detected as the attribute information. Therefore, an encryption process may be performed.

Next, a fifth embodiment of the recording / reproducing apparatus of the present invention will be described with reference to FIG. FIG. 15 is a block diagram of a recording / reproducing apparatus according to the present embodiment.
1, a recording / reproducing apparatus including a recording processor 1502, an identification signal detector 1503, a comparator 1504, and a reproducing processor 1505.

In the recording process, the identification signal generator 150
1 generates identification information unique to the recording / reproducing apparatus. The recording processor 1502 records the input data and the generated identification information on the recording medium 1500.

In the reproducing process, the identification information of the recording / reproducing device recorded in the recording process recorded on the recording medium 1500 is read. The comparator 1504 compares the identification information read from the recording medium 1500 with the identification signal generated by the identification signal generator 1501. The reproduction processor 1505 reproduces data recorded on the recording medium 1500, and the reproduction processing is controlled according to the comparison result of the comparator 1504.

If the identification information recorded on the recording medium 1500 does not match the identification information generated by the identification signal generator 1501, the reproduction processing of the reproduction processor 1505 is stopped. That is, if the data recorded on the recording medium 1500 is data recorded by a recording device different from the recording / reproducing device that is going to perform the reproducing process, the recording / reproducing device that has performed the recording process without performing the reproducing process of the recorded data The reproducing process is performed only by the same recording / reproducing device.

By doing so, the recording / reproducing apparatus of this embodiment can perform only self-recording / reproducing processing. Therefore, it is possible to prevent reproduction processing of data illegally recorded by another recording apparatus, and to prevent copyright and other information. Infringement can be prevented.

As described above, by comparing the identification information to be recorded in the recording process with the identification information read in the reproduction process, and controlling the reproduction process, only the same recording / reproducing apparatus that has performed the recording process is used. Since the reproduction process is not performed, it is possible to prevent illegally recorded data from being reproduced by an unspecified reproducing device or a recording / reproducing device, and protect copyright and the like.

Further, since the self-recording / reproducing process by the recording / reproducing apparatus of this embodiment is possible, the user's right to perform time-shift reproduction can be protected.

Further, the present invention does not perform reproduction control depending on whether or not the identification information of the recording apparatus can be extracted as described in the section of the prior art. By performing reproduction control by comparing the read identification information with the
It can be specified only to the recording / reproducing device that records the data, and stronger protection such as copyright can be performed.

Next, a sixth embodiment of the recording / reproducing apparatus of the present invention will be described with reference to FIG. FIG. 16 is a block diagram of the recording / reproducing apparatus of the present embodiment. The recording / reproducing apparatus of the present invention has the same configuration as that of the fifth embodiment of the present invention of FIG. 15, but includes an attribute information detector 1601. , And the comparator 160
2 is different.

An attribute information detector 1601 detects attribute information of recorded data. The comparator 1602 compares the identification information read in the reproduction process with the identification information generated by the identification signal generator 1501 according to the attribute information of the detected data, and controls the reproduction processor 1507. That is, it is determined whether or not the reproduction control needs to be performed based on the attribute information of the data. Therefore, when reproducing data for which reproduction control is required, the recorded identification information is compared with the identification information unique to the recording / reproducing device, and if they match, the reproducing process is executed. Stops the reproduction process. On the other hand, when reproducing data that does not require the reproduction control, the data read from the recording medium is directly reproduced without performing the comparison processing of the identification information.

It should be noted that the attribute information may be the same as the information described in the second embodiment of the reproducing apparatus of the present invention, and copyright information, data type information, copy permission information, etc. may be used as attribute information. Detection may be performed and reproduction control may be performed.

As described above, by comparing the identification information recorded in the recording process with the identification information read out in the reproduction process in accordance with the attribute information of the data, and controlling the reproduction process, depending on the attribute of the data, Since the reproduction process is performed only by the same recording / reproducing device that performed the recording process, it is possible to prevent illegally recorded data from being reproduced by an unspecified reproducing device or a recording / reproducing device. Etc. can be protected.

Also, according to the present invention, the reproduction control is not performed based on whether or not the identification information of the recording apparatus can be extracted as described in the section of the prior art. By performing reproduction control by comparing the read identification information with the
It can be specified only to the recording / reproducing device that records the data, and stronger protection such as copyright can be performed.

Further, since the self-recording / reproducing process by the recording / reproducing apparatus of the present embodiment is possible, the right of the user to perform the time-shift reproduction can be protected.

Next, a seventh embodiment of the recording / reproducing apparatus of the present invention will be described with reference to FIG. FIG. 17 is a block diagram of the recording / reproducing apparatus of this embodiment, which has the same configuration as that of the sixth embodiment of the recording / reproducing apparatus of the present invention, but includes a first attribute information detector 1701. , Recording processor 170
2 and the operation of the second attribute information detector 1703 are different.

In the recording process, the first attribute information detector 1701 detects and outputs the attribute information of the input data.
The recording processor 1702 stores the data and the attribute information detected together with the identification information unique to the recording / reproducing apparatus on the recording medium 1700
To record.

In the reproducing process, the second attribute information detector 1703 reads the attribute information of the data recorded on the recording medium 1700. The comparator 1704 compares the identification information recorded on the recording medium with the identification information generated by the city council signal generator 1501 according to the attribute information of the read data, and controls the reproduction process. .

As described above, by recording the attribute information of the data on the recording medium 1700, the attribute information can be easily recognized in the reproducing process, so that it is determined whether the control of the reproducing process is necessary. Easier to do.

Also, the present invention does not perform reproduction control depending on whether or not the identification information of the recording apparatus can be extracted as described in the section of the prior art. By performing reproduction control by comparing the read identification information with the
It can be specified only to the recording / reproducing device that records the data, and stronger protection such as copyright can be performed.

Further, since the self-recording / reproducing process by the recording / reproducing apparatus of this embodiment is possible, the user's right to perform time-shift reproduction can be protected.

Examples of the attribute information include copyright information, data type information, and the like as described in the second embodiment of the recording apparatus of the present invention or the second embodiment of the reproducing apparatus of the present invention. Copy permission information or the like may be detected as attribute information.

In the above-described embodiments of the recording apparatus, the reproducing apparatus, and the recording / reproducing apparatus, the data to be recorded on the recording medium is not limited, and includes video data, audio data, application software data, programs, and documents. Anything, such as data, is acceptable.

If the data is copy-prohibited, the recording process on the recording medium may be stopped.

Although the encryption key information is generated from the identification information, the present invention is not limited to this. The encryption processing or the decryption processing may be performed using the identification information as the key information.

Further, although means for generating cryptographic key information from the identification information is provided, key information unique to the apparatus may be stored in advance, and the stored key information may be read when necessary. .

The means for detecting the attribute information of the data may be detected from the data, or may be detected from the attribute data input by another system different from the data.

Next, a first embodiment of the data transmitting apparatus of the present invention will be described with reference to FIG. FIG. 18 is a block diagram of a data transmission device according to the present embodiment, which includes a recording / reproduction restriction information generator 1800, an attribute information generator 1801, and a multiplexer 18.
02, and a transmitter 1803.

When the data to be transmitted is recorded on the receiving side, the recording / reproduction restriction information generator 1800 reproduces the recorded data only with the reproducing device associated with the recording device used for recording. This is to generate information for permitting and restricting reproduction by another reproducing apparatus, and to determine whether or not to restrict according to the judgment of the data sender, and to output recording / reproduction restriction information.

The attribute information generator 1801 outputs attribute information of data to be transmitted, and includes information on data attributes such as copy permission information, data type information, and copyright information, and input recording / reproduction restriction information. The attribute information including at least is output.

The generated attribute information is multiplexed with the data by the multiplexer 1802, and is transmitted to the transmission path by the transmitter 1803.

As described above, when the data transmitted by the data transmitting apparatus of the present embodiment is recorded on another recording medium, the reproducing apparatus capable of reproducing the recorded data is restricted, whereby the data can be reproduced. Can be protected.

Furthermore, since reproduction can be performed by using a specific reproduction apparatus, the user's right to perform time-shift reproduction can be protected.

The recording device and the reproducing device may be associated with each other by identification information unique to each device.

Next, a data transmission apparatus according to a second embodiment of the present invention will be described with reference to FIG. The configuration of this embodiment is the same as that of the first embodiment of the data transmitting apparatus of the present invention, except that a self-recording / reproduction restriction information generator 1810 is provided.

The self-recording / reproduction restriction information generator 1810 is information indicating that when data is received and recorded on a recording medium, reproduction is permitted only by the recording / reproducing apparatus used for recording on the recording medium. Outputs self-recording restriction information. Whether to limit the process to self-recording / reproducing is determined by the data sender.

The attribute information generator 1801 outputs attribute information of data to be transmitted. The attribute information generator 1801 includes information on the attributes of a large number of data such as copy permission information, data type information, and copyright information. The attribute information including at least the self-recording / reproduction restriction information is output.

As described above, when the data is recorded on the recording medium, only the self-recording / reproducing process is restricted, thereby protecting the data such as the copyright.

Furthermore, since the reproduction can be performed by using the recording / reproducing apparatus used for the recording process, the right of the user to perform the time-shift reproduction can be protected.

The recording / reproducing apparatus may be specified by unique identification information. Next, a fifth embodiment of the recording apparatus of the present invention will be described with reference to FIG. FIG.
Is a block diagram of the recording apparatus of this embodiment, which comprises a recording / reproduction restriction information generator 1900, an attribute information generator 1901, a multiplexer 1902, and a recording processor 1903, and records data on a recording medium 1904. It is.

When the recording / reproduction restriction information generator 1900 reproduces a recording medium on which data is recorded by the recording apparatus of the present embodiment and re-records it on another recording medium, it is associated with the recording apparatus used for the re-recording processing. Recording / reproduction restriction information, which is information indicating that reproduction is permitted only on the reproducing apparatus that has performed the reproduction and that reproduction on other reproduction apparatuses is restricted. That is, the recording / reproduction restriction information indicates that even if the data is copied based on the recording medium recorded in the present embodiment, the data copied only by the reproduction device associated with the recording device that has performed the copy process. This is information for allowing reproduction.

An attribute information generator 1901 outputs attribute information of data to be transmitted, and includes information on data attributes such as duplication permission information, data type information and copyright information, and input recording / reproduction restriction information. The attribute information including at least is output.

[0200] The generated attribute information is multiplexed with data by a multiplexer 1902, and a recording process is performed on a recording medium 1904 by a recording processor 1903.

As described above, when the data of the recording medium recorded by the recording apparatus of the present embodiment is re-recorded on another recording medium, the reproducing apparatus capable of reproducing the re-recorded data is limited. This can protect the data such as copyright.

Furthermore, since reproduction can be performed by using a specific reproduction device, the user's right to perform time-shift reproduction can be protected.

The recording device and the reproducing device may be associated with each other by identification information unique to each device.

Next, a sixth embodiment of the recording apparatus of the present invention will be described with reference to FIG. The configuration of this embodiment is the same as that of the fifth embodiment of the recording apparatus of the present invention, except that a self-recording / restriction information reproducer 1910 is provided.

The self-recording / reproduction restriction information 1910 is used when the recording medium recorded according to the present embodiment is reproduced and the reproduced data is re-recorded on another recording medium. The self-recording / reproduction restriction information, which is information indicating that reproduction is permitted only in the, is output.

The attribute information generator 1901 outputs attribute information of data to be recorded. The attribute information generator 1901 includes, for example, copy permission information, data type information, copyright information, etc. The attribute information including at least the self-recording / reproduction restriction information is output.

As described above, when the data is recorded on the recording medium, only the self-recording / reproducing process is restricted, thereby protecting the data such as the copyright.

Furthermore, since reproduction can be performed by using the recording / reproducing apparatus used for the recording process, the right of the user to perform time-shift reproduction can be protected.

[0209] The recording / reproducing apparatus may be specified by unique identification information. Next, a first embodiment of the recording medium of the present invention will be described with reference to FIG. FIG.
Reference numeral 2 denotes a recording format of the recording medium of the present embodiment.

[0210] The recording data is classified into data 2002 and header information 2001 relating to the data. The header information 2001 is classified into an ID code 2003 for identifying data, address information 2004, data attribute information 2005, and control information 2006 on other data.

[0211] The attribute information 2005 includes a header code 2007 indicating the attribute information, and the copy generation management information (CGMS) 20.
08, data type information 2010, copyright information 201
1 and recording / reproduction restriction information 2009.

[0212] When the recording medium of this embodiment is reproduced and re-recorded on another recording medium, the recording / reproduction restriction information 2009 permits reproduction only by the reproducing apparatus associated with the recording apparatus used for the re-recording processing. This is information indicating that That is, even if data is copied based on the recording medium of the present embodiment, the copied data can be reproduced only by the reproducing device associated with the recording device that has performed the copy process.

As described above, when the recording medium of the present embodiment is re-recorded on another recording medium, the reproduction apparatus that can reproduce the re-recorded data is restricted, so that the copyright of the data can be improved. Can be protected.

Further, since reproduction can be performed by using a specific reproduction apparatus, the user's right to perform time-shift reproduction can be protected.

[0215] It should be noted that the association between the recording device and the reproducing device may be made by identification information unique to each device.

The configuration of the header information of the data is not limited, and it is sufficient that the header information of the data includes at least the recording / reproduction restriction information 2009.

Next, a second embodiment of the recording medium of the present invention will be described with reference to FIG. FIG. 21 shows the recording format of the recording medium of this embodiment, which is almost the same as that of the first embodiment of the recording medium of the present invention.
005 is different from that of FIG.

When the recording medium of this embodiment is reproduced and re-recorded on another recording medium, the self-recording / reproduction restriction information 2101 in the attribute information 2005 is permitted to be reproduced only by the recording / reproducing apparatus used for the re-recording processing. This is information indicating that That is,
Even when data is copied based on the recording medium of the present embodiment, the copied data can be reproduced only by the recording / reproducing apparatus that has performed the copy processing.

As described above, when the recording medium of the present embodiment is re-recorded on another recording medium, only the self-recording and re-processing by the recording / reproducing apparatus used for the re-recording is restricted, so that the Can be protected.

Furthermore, since the reproduction can be performed by using the recording / reproducing apparatus used for the recording process, the right of the user to perform the time-shift reproduction can be protected.

The recording / reproducing apparatus may be specified by identification information unique to each apparatus. The recording device, the reproducing device, and the identification information unique to the recording and reproducing device include:
Any information unique to each device, such as a device manufacturer, a manufacturing date, a manufacturing location, and a device serial number, may be used, or information obtained by encrypting such information may be used.

Further, the identification information may have different identification information in different devices, or may have the same identification information in a specific device. However, if the recording medium has the same identification information, the recording medium recorded by the recording apparatus for a certain identification information can be reproduced by a plurality of reproduction apparatuses. It is not preferable from the standpoint of protection such as copyright.

[0223]

According to the recording apparatus of the present invention, the data recorded on the recording medium can be reproduced only by the specific reproducing apparatus by performing the encryption processing unique to the recording apparatus.
Copyright of data can be protected. Also, since the identification information of the recording device or the encryption key is not recorded on the recording medium, it is possible to prevent unauthorized decryption on the reproduction side, and to more strongly protect copyrights and the like. it can.

Further, since the reproducing apparatus of the present invention performs decryption based on a unique key, it is possible to decrypt only data permitted by the reproducing apparatus. Furthermore, since information related to decryption such as an identification signal unique to the recording device or a key for the encryption process is not recorded on the recording medium,
The reproducing apparatus cannot read the information related to the decryption from the recording medium, so that stronger protection such as copyright can be realized.

Further, the reproducing apparatus of the present invention compares the identification information of the recording apparatus with the identification information of the reproducing apparatus and controls the reproducing process, so that the reproducing apparatus can be reproduced only by a predetermined combination of the recording apparatus and the reproducing apparatus. Since no processing is performed, it is possible to prevent illegally recorded data from being reproduced by an unspecified reproducing device, and to protect copyright and the like.

Further, the reproducing apparatus of the present invention does not perform the reproduction control depending on whether or not the identification information of the recording apparatus can be extracted as described in the section of the related art, but the identification information of the recording apparatus and the information specific to the reproducing apparatus. By performing the reproduction control by comparing the reproduction information with the proper identification information, it is possible to specify the reproduction apparatus that reproduces the recording medium, and it is possible to perform stronger protection such as copyright.

[0227] Further, by performing encryption processing unique to the recording / reproducing apparatus of the present invention and recording it on a recording medium, only data recorded by this recording / reproducing apparatus can be decrypted. Alternatively, by preventing reproduction on the reproduction device, illegal duplication of data can be prevented, and copyright and the like can be protected.

Further, since the identification information unique to the recording / reproducing apparatus is not recorded on the recording medium, it is not possible to obtain the information in the encryption processing from the recording medium, it is possible to prevent the illegal reproduction processing, and to achieve a higher power. Copyright protection can be realized.

Further, the recording / reproducing apparatus of the present invention compares the identification information recorded in the recording process with the identification information read out in the reproducing process, and controls the reproducing process to obtain the same result as that of the recording process. Since the reproduction process is performed only by the recording / reproducing device, it is possible to prevent illegally recorded data from being reproduced on an unspecified reproducing device or a recording / reproducing device, thereby protecting copyrights. it can.

Further, as described in the section of the related art, the reproduction control is not performed based on whether or not the identification information of the recording apparatus can be extracted, but the unique identification information to be recorded in the recording process and the identification information read in the reproduction process. By performing the reproduction control by comparing the information with the information, the reproduction of the recording medium can be specified only to the recording / reproducing apparatus that recorded the data,
Stronger copyright and other protections can be provided.

Further, the data transmitting apparatus of the present invention restricts the reproducing apparatus which can reproduce the recorded data when the transmitted data is recorded on another recording medium, so that the data And the like, and reproduction can be performed by using a specific reproduction device, so that the user's right to perform time-shift reproduction can also be protected.

Further, the data transmitting apparatus of the present invention can protect the copyright of data by restricting only to the self-recording / reproducing process when recorded on the recording medium, and can perform the recording process. Since reproduction can be performed using the recording / reproducing apparatus used, the user's right to perform time-shift reproduction can be protected.

The recording apparatus of the present invention can reproduce the re-recorded data when the data of the recording medium recorded by the recording apparatus of the present invention is re-recorded on another recording medium. By restricting the apparatus, it is possible to protect the copyright of data and the like, and also to protect the user's right to perform time-shift reproduction.

Further, the recording apparatus of the present invention is capable of performing self-recording / reproducing processing by a recording / reproducing apparatus which has performed re-recording processing when data of a recording medium which has been subjected to recording processing by the recording apparatus of the present invention is re-recorded on another recording medium. By restricting to only data, it is possible to protect the copyright of data and the like, and also to protect the user's right to perform time-shift reproduction.

Further, the recording medium of the present invention restricts a reproducing apparatus capable of reproducing the re-recorded data when the data of the recording medium of the present invention is re-recorded on another recording medium. In addition, it is possible to protect the copyright of data and the like, and also to protect the user's right to perform time-shift reproduction.

Further, the recording medium of the present invention can be used when the data of the recording medium of the present invention is re-recorded on another recording medium.
By restricting only the self-recording / reproducing process by the recording / reproducing device that has performed the re-recording process, it is possible to protect the copyright of data and the like, and also to protect the user's right to perform time-shift reproduction.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of a recording apparatus of the present invention.

FIG. 2 is a block diagram showing a second embodiment of the recording apparatus of the present invention.

FIG. 3 is a block diagram showing a third embodiment of the recording apparatus of the present invention.

FIG. 4 is a block diagram showing a fourth embodiment of the recording apparatus of the present invention.

FIG. 5 is a block diagram showing a first embodiment of the reproducing apparatus of the present invention.

FIG. 6 is a block diagram showing a second embodiment of the reproducing apparatus of the present invention.

FIG. 7 is a block diagram showing a third embodiment of the reproducing apparatus of the present invention.

FIG. 8 is a block diagram showing a fourth embodiment of the reproducing apparatus of the present invention.

FIG. 9 is a block diagram showing a fifth embodiment of the reproducing apparatus of the present invention.

FIG. 10 is a block diagram showing a sixth embodiment of the reproducing apparatus of the present invention.

FIG. 11 is a block diagram showing a first embodiment of the recording / reproducing apparatus of the present invention.

FIG. 12 is a block diagram showing a second embodiment of the recording / reproducing apparatus of the present invention.

FIG. 13 is a block diagram showing a third embodiment of the recording / reproducing apparatus of the present invention.

FIG. 14 is a block diagram showing a fourth embodiment of the recording / reproducing apparatus of the present invention.

FIG. 15 is a block diagram showing a fifth embodiment of the recording / reproducing apparatus of the present invention.

FIG. 16 is a block diagram showing a sixth embodiment of the recording / reproducing apparatus of the present invention.

FIG. 17 is a block diagram showing a seventh embodiment of the recording / reproducing apparatus of the present invention.

FIG. 18 is a block diagram showing a first embodiment of the data transmission device of the present invention.

FIG. 19 is a block diagram showing a second embodiment of the data transmitting apparatus of the present invention.

FIG. 20 is a block diagram showing a fifth embodiment of the recording apparatus of the present invention.

FIG. 21 is a block diagram showing a recording apparatus according to a sixth embodiment of the present invention;

FIG. 22 is a diagram showing a data structure of the first embodiment of the recording medium of the present invention.

FIG. 23 is a diagram showing a data structure of the first embodiment of the recording medium of the present invention.

[Explanation of symbols]

1,502,901,1101,1501 Identification signal generator 2,503,1102 Key generator 3,1103 Cryptographic processor 4,302,402,1104,1302,1402
1502, 1702 recording processor 5,300,400,500,600,700,80
0,900,1000,1100,1300,140
0, 1500, 1700 Recording media 201, 301, 401, 601, 701, 1001,
1207, 1214, 1301, 1303, 1401,
1403, 1601, 1701, 1703 Attribute information detector 202, 207, 602, 607, 1201, 120
6, 1208, 1213 switch 501, 904, 1105, 1505 Playback processor 504, 1106 Decryptor 801 Encryption discriminator 902, 1503 Identification signal detector 903, 1002, 1504, 1602, 1704
Comparator 1801, 1901 Attribute information generator 1802, 1902 Multiplexer 1803 Transmitter 1903 Recording processor 1904 Recording medium 2001 Header information 2002 Data part 2003 ID code 2004 Address information 2005 Attribute information 2006 Control information 2007 Header code 2008 CGMS 2009 Recording Reproduction restriction information 2010 Type information 2011 Copyright information 2101 Self-recording / reproduction restriction information

Claims (52)

[Claims] 1. A recording device for recording data on a recording medium, wherein the data is encrypted based on unique identification information of the recording device or key information generated based on the identification information. A recording apparatus comprising: an encryption unit that outputs recording data; and a recording unit that records the recording data on the recording medium. 2. A recording apparatus according to claim 1, further comprising means for detecting attribute information of said data, wherein said encryption means performs an encryption process according to said attribute information. 3. The recording apparatus according to claim 2, wherein said attribute information is recorded in a predetermined area of said recording medium. 4. The attribute information, wherein the data is video data,
4. The recording apparatus according to claim 2, wherein the information is information indicating that at least one of audio data is included. 5. The recording apparatus according to claim 2, wherein the attribute information includes at least copy permission information on the data. 6. The recording apparatus according to claim 2, wherein the attribute information includes at least copyright information on the data. 7. The attribute information includes at least a mode in which, when the data is reproduced and recorded using a predetermined recording device, reproduction is permitted only by a reproduction device associated with the predetermined recording device. Claim 2 or Claim 3
The recording device as described in the above. 8. The attribute information includes at least a mode in which, when the data is reproduced and recorded using a predetermined recording / reproducing apparatus, reproduction is permitted only by the predetermined recording / reproducing apparatus. Item 4. The recording device according to Item 2 or 3. 9. The recording apparatus according to claim 1, wherein encryption discrimination information indicating that encryption processing has been performed by said encryption means is recorded in a predetermined area of said recording medium. 10. A reproducing apparatus for reproducing data recorded on a recording medium, comprising: means for reading data from the recording medium; and identification information unique to the reproducing apparatus or generated based on the identification information. A reproducing apparatus comprising: decryption means for decrypting the data based on key information. 11. The reproducing apparatus according to claim 10, further comprising means for detecting attribute information of said data, wherein said decryption means performs decryption processing in accordance with said attribute information. 12. The apparatus according to claim 10, further comprising means for reading attribute information of said data recorded in a predetermined area of said recording medium, and performing decryption processing of said data in accordance with said attribute information. The playback device according to any one of the preceding claims. 13. The apparatus according to claim 11, wherein the attribute information is information indicating that the data includes at least one of video data and audio data.
Or the playback device according to item 12. 14. The apparatus according to claim 1, wherein the attribute information includes at least copy permission information on the data.
13. The playback device according to 1 or 12. 15. The apparatus according to claim 11, wherein the attribute information includes at least copyright information on the data.
Or the playback device according to item 12. 16. The attribute information includes at least a mode in which, when the data is reproduced and recorded using a predetermined recording device, reproduction is permitted only by a reproduction device associated with the predetermined recording device. 13. The reproducing apparatus according to claim 11, wherein 17. The apparatus according to claim 17, wherein said attribute information includes at least a mode in which, when said data is reproduced and recorded using a predetermined recording / reproducing device, reproduction is permitted only by said predetermined recording / reproducing device. Item 13. The playback device according to Item 11 or 12. 18. An apparatus according to claim 18, further comprising means for reading encryption identification information recorded in a predetermined area of said recording medium to determine that said data is encrypted. 11. The reproducing apparatus according to claim 10, wherein the decryption unit performs decryption processing of the data. 19. A reproducing apparatus for reproducing data recorded on a recording medium, comprising: means for reading recording apparatus identification information for identifying a recording apparatus which has recorded the data recorded on the recording medium; An identification information comparing unit that compares the device identification information with playback device identification information unique to the playback device; and a playback unit that reads data from a recording medium and plays back the data. A reproduction apparatus, wherein reproduction of the data is stopped when the reproduction apparatus identification information does not match. 20. A data processing apparatus comprising: means for detecting attribute information of the data, and controlling a comparison process between the recording device identification information and the reproduction device identification information and a data reproduction process according to the detected attribute information. 20. The playback device according to claim 19, wherein: 21. A device for reading out attribute information of the data recorded in a predetermined area of the recording medium, and comparing the recording device identification information with the reproduction device identification information according to the read attribute information. 20. The playback apparatus according to claim 19, wherein the playback apparatus controls processing and data playback processing. 22. The attribute information according to claim 20, wherein the attribute information is information indicating that the data includes at least one of video data and audio data.
Or the playback device according to 21. 23. The apparatus according to claim 20, wherein the attribute information includes at least copy permission information on the data.
Or the playback device according to 21. 24. The reproducing apparatus according to claim 20, wherein the attribute information includes at least copyright information on the data. 25. The attribute information includes at least a mode in which, when the data is reproduced and recorded using a predetermined recording device, reproduction is permitted only by a reproducing device associated with the predetermined recording device. 22. The playback device according to claim 20, wherein: 26. The attribute information includes at least a mode in which when the data is reproduced and recorded using a predetermined recording / reproducing device, reproduction is permitted only by the predetermined recording / reproducing device. Item 22. The playback device according to item 20 or 21. 27. A recording / reproducing apparatus for recording and reproducing data on / from a recording medium, wherein the recording / reproducing apparatus performs encryption processing based on identification information unique to the recording / reproducing apparatus or key information generated based on the identification information. Encrypting means for outputting the recording data on the recording medium, recording means for recording the recording data on the recording medium, means for reproducing data from the recording medium and outputting reproduced data, and based on the identification information or the key information. And a decryption means for decrypting the reproduced data. 28. The recording / reproducing apparatus according to claim 27, further comprising means for detecting data attribute information, wherein said encryption means performs an encryption process according to said attribute information. 29. A recording / reproducing apparatus according to claim 27, further comprising means for detecting attribute information of said reproduction data, wherein said decryption means performs decryption processing according to said attribute means. 30. A recording / reproducing apparatus according to claim 28, wherein said attribute information is recorded in a predetermined area of said recording medium. 31. The recording / reproducing apparatus according to claim 30, further comprising means for reading out the attribute information recorded in the predetermined area, wherein the decryption means performs decryption processing according to the attribute information. . 32. The attribute information according to claim 28, wherein said attribute information is information indicating that the data includes at least one of video data and audio data.
The recording / reproducing apparatus according to any one of claims 1 to 7. 33. The apparatus according to claim 28, wherein the attribute information includes at least copy permission information on the data.
32. The recording / reproducing device according to any one of to 31. 34. The recording / reproducing apparatus according to claim 28, wherein said attribute information includes at least copyright information on said data. 35. The attribute information includes at least a mode in which, when the data is reproduced and recorded using a predetermined recording device, reproduction is permitted only by a reproducing device associated with the predetermined recording device. The recording / reproducing apparatus according to any one of claims 28 to 31, characterized in that: 36. The attribute information includes at least a mode in which when the data is reproduced and recorded using a predetermined recording / reproducing device, reproduction is permitted only by the predetermined recording / reproducing device. Item 32. The recording / reproducing device according to any one of Items 28 to 31. 37. The recording / reproducing apparatus according to claim 27, wherein encryption discrimination information indicating that encryption processing has been performed by said encryption means is recorded in a predetermined area of said recording medium. 38. means for reading out the encryption discrimination information recorded in the predetermined area, and judging that the reproduced data is encrypted, wherein when the reproduced data is encrypted, 38. The recording / reproducing apparatus according to claim 37, wherein the decryption unit performs decryption processing of the reproduced data. 39. A recording and reproducing apparatus for recording and reproducing data on and from a recording medium, comprising: means for recording identification information unique to the recording and reproducing apparatus on a recording medium; and recording means for recording the data on the recording medium. Means for reading the identification information from the recording medium and outputting reproduction identification information, means for comparing the reproduction identification information with the identification information, and means for reproducing data from the recording medium and outputting reproduction data. Recording / reproducing apparatus, wherein when the reproduction identification information does not match the identification information, reproduction of the data is stopped. 40. A device comprising means for detecting attribute information of said data, and controlling a comparing process between said recording device identification information and said reproducing device identification information and a data reproducing process according to the detected attribute information. 40. The recording / reproducing apparatus according to claim 39, wherein: 41. A recording apparatus comprising: means for recording the attribute information of the data in a predetermined area of a recording medium; and means for reading the attribute information recorded in the predetermined area. 40. The recording / reproducing apparatus according to claim 39, wherein a comparison processing between the recording apparatus identification information and the reproduction apparatus identification information and a data reproduction processing are controlled. 42. The attribute information according to claim 40, wherein the attribute information is information indicating that the data includes at least one of video data and audio data.
42. The recording / reproducing apparatus according to 41. 43. An apparatus according to claim 40, wherein said attribute information includes at least copy permission information on said data.
42. The recording / reproducing apparatus according to 41. 44. The recording / reproducing apparatus according to claim 40, wherein the attribute information includes at least copyright information on the data. 45. The attribute information includes at least a mode in which, when the data is reproduced and recorded using a predetermined recording device, reproduction is permitted only by a reproducing device associated with the predetermined recording device. 42. The recording / reproducing apparatus according to claim 40 or claim 41. 46. The attribute information includes at least a mode in which, when the data is reproduced and recorded using a predetermined recording / reproducing device, reproduction is permitted only by the predetermined recording / reproducing device. Item 40. The recording / reproducing device according to Item 40 or 41. 47. An apparatus for transmitting data, comprising: multiplexing means for multiplexing attribute information of the data and the data; and transmitting means for transmitting an output of the multiplexing means. Includes at least a mode for permitting reproduction of the data recorded on the recording medium only by a reproducing device associated with the recording device when the reception side records the data on a recording medium using a recording device. A data transmission device characterized by the above-mentioned. 48. An apparatus for transmitting data, comprising: multiplexing means for multiplexing attribute information of the data and the data; and transmitting means for transmitting an output of the multiplexing means. When the data is recorded on a recording medium using a recording / reproducing device on the receiving side, at least a mode for permitting reproduction of the data recorded on the recording medium only by the recording / reproducing device is included. Data transmission device. 49. An apparatus for recording data on a first recording medium, comprising: multiplexing means for multiplexing the attribute information of the data and the data; and outputting the output of the multiplexing means to the first recording medium. Recording means for recording on a medium, the attribute information, when the reproduction data obtained by reproducing the first recording medium is recorded on a second recording medium using a predetermined recording device, the attribute information is transmitted to the predetermined recording device A recording apparatus comprising at least a mode for permitting reproduction of the reproduction data recorded on the second recording medium only by an associated reproduction apparatus. 50. An apparatus for recording data on a first recording medium, comprising: multiplexing means for multiplexing the attribute information of the data and the data; and outputting the output of the multiplexing means to the first recording medium. Recording means for recording the data on a medium, wherein the attribute information is recorded on the second recording medium by using a predetermined recording / reproducing apparatus for reproducing data obtained by reproducing the first recording medium; A recording apparatus comprising at least a mode in which reproduction of the reproduction data recorded on the second recording medium is permitted only by a reproduction apparatus. 51. A recording medium on which data is recorded, wherein the recording medium records at least the data and attribute information of the data, and the attribute information is a predetermined number of reproduction data obtained by reproducing the recording medium. When recording is performed on another recording medium by the recording apparatus, at least a mode for permitting reproduction of the reproduction data recorded on the other recording medium only by a reproduction apparatus associated with the predetermined recording apparatus is provided. Recording medium. 52. A recording medium on which data is recorded, wherein the recording medium records at least the data and attribute information of the data, and the attribute information records reproduction data obtained by reproducing the recording medium. A recording medium characterized by including at least a mode of permitting reproduction of reproduction data recorded on the other recording medium only by the recording / reproducing apparatus when recording is performed on the other recording medium using the reproducing apparatus.