JP3304032B2 - Information processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recording or reproducing data compressed by high-efficiency encoding on a recording medium (for example, a recording medium such as a compact disk (CD) or a magneto-optical medium) or transmitting the data. In order to protect copyright and charge when transmitted and used on a channel (for example, a transmission channel such as wireless or wired broadcasting and CATV), reproduction or reception of limited data to an unspecified number of users is performed. On the other hand, limited playback by so-called scrambling, which allows specific users to play or receive all of the original data,
The present invention relates to an information processing device that realizes a receiving function.

[0002]

[Prior art]

(Conventional information compression technology) Audio-video information (AV information)
CD-ROM compressed and recorded by high-efficiency coding using PEG1 (Moving Picture Experts Group 1)
As a read-only medium, for example, a video CD is known as a standardized and commercialized medium. By the way, M
Regarding the technology of the PEG system, see, for example, “Technical description (special feature) of the Television Society Journal Vol.46 No.9, 1992”
PEG "and" Optronics No. 5, 1992 Encoding in Storage Medium ".

[0003] The MPEG1 compression algorithm for encoding moving pictures up to about 1.5 Mb / s is as follows. First, the input image is subjected to compression processing in video frame units. That is, inter-frame predictive coding that takes the difference from the preceding and succeeding frames is performed. P frame obtained by performing inter-frame coding from previous image data, B frame obtained by performing bidirectional prediction from preceding and succeeding frames, and each GOP
In order to maintain the independence of (Group of Pictures, group of screens), this input image is sequentially encoded together with the intra-frame encoded I frame. Here, the motion of the frame that takes the difference from the input image is previously compensated so that the prediction error is reduced. Next, the difference in prediction error is decomposed into pixel units, and the DCT (Discrete Cosine Transf
orm, discrete cosine transform) to reduce the amount of information in the spatial direction of the image. After that, the quantized variable length code (Variab
le Length Codes (VLC), the amount of information is further reduced. Thus, the MPEG compression algorithm ends.

In the compression process, the MPEG system uses many parameters (such as a conversion table). For example, a "motion vector" for motion compensation, a frame is divided into a set of pixels such as a slice or a macroblock in order to perform DCT, and a "slice start code" or "macroblock address" indicating a position in the frame. , A "quantization matrix" as a quantization table, a "VLC table" for VLC of various data, and the like.

[0005] The structure of MPEG data after compression is D
Frame, GOP based on 8x8 pixels, which is the unit of CT
Furthermore, data is configured hierarchically up to the sequence unit,
The required parameters are added to each layer.

(Necessity of Copyright Protection) In recent years, with the spread of digital recording / reproducing technology, music and images can be easily enjoyed with high quality. In addition, rental systems and pay broadcasting have become common. In such an environment, illegal copies and systematic copies that have not been a problem in the past have been increasing year by year, and damages to copyright holders have become a problem. In addition, with the growing awareness of copyright protection worldwide and the promotion of legislation, the balance between the soft side (copyright holding side) and the hard side (device manufacturing side) has been Is gone. In addition, the user (consumer) consciousness has changed from the conventional consciousness of buying "things" to a "payment of usage fee" consciousness due to the understanding of copyright protection.

[0007] However, as always, illegal copying and systematic copying continue, and various proposals have been made for the protection of copyrights and the protection of rights (profits from copyrights). on the other hand,
Since the recording system is gradually shifting to the digital system, even if the image is repeatedly copied, the signal is hardly deteriorated, and a high-quality copy can be easily obtained. In the multimedia era, especially digital information, copyright protection is more important than ever.

[0008] Therefore, in particular, digital recording / reproducing devices to be developed in the future will not be accepted internationally and by industry and consumers unless the system has a copyright protection function.

(Conventional Copyright Protection) Conventionally, various methods have been proposed for protecting copyrights of music and images. For example, in a VTR, a normal screen can be obtained from the output signal in a TV receiver, but this is copied in a VTR.
Then, a copy prevention measure that prevents a normal screen from being obtained even when the copied tape is reproduced on a VTR is recorded in the output signal (for example, a so-called macro vision system,
These are disclosed in JP-A-61-288582 and JP-A-63-107281).

[0010] CD (Compact Disc) and DAT (Di-
gital Audio Tape), MD (Mini Disc), DCC (Di
Digital equipment such as a gital compact cassette) has very little deterioration during copying (dubbing), so special attention is paid to copyright protection, and the system includes copy protection by recording SCMS and a copy prohibition flag.

In addition to the package media, for example, in the case of CATV or satellite broadcasting, information to be transmitted mainly for billing is scrambled, and pay broadcasting can be viewed by a subscriber or a descrambler on the premise of billing. I have. Regarding copyright protection technology such as broadcasting, see, for example, “Television Society Journal Vol.4.
7, No. 2, pp. 149-154 (1993) Latest Security Technology and Its Application 4-1 Broadcast ".

In the field of other computers, an advanced encryption system is used as an electronic signature for keeping confidential communication data and identifying a user. Above all, DES
The (DataEncryption Standard) method is an encryption method established by the US Department of Commerce and widely used in the United States. Also,
Recently, public key cryptography, which emphasizes openness, and NTT
The FEAL method developed by the company is often used. For information on these encryption techniques, see, for example,
Vol.47, No.2, pp.135-138 (1993) What is the security technology that attracts attention? "

[0013]

[Problems to be solved by the invention]

(Disadvantages of the conventional copyright protection method) Among the conventional copyright protection methods, the copy protection method used in analog VTRs and the like is a method of simply deteriorating signals and deteriorating them so that they cannot be used. Copy protection by recording of SCMS and copy prohibition flags used in digital equipment such as MD and DCC is a very excellent method from the viewpoint of copy protection of a recording signal, but an actual reproduction operation is performed only by the possibility of copying. It is not possible.

In the conventional scramble processing and descrambling for billing performed in CATV and satellite broadcasting, contents (software) cannot be viewed as much as possible except for subscribers or billed subjects. Complex scrambling has been applied.

[0015] As described above, the conventional copyright protection method is an alternative of whether the content can be reproduced or viewed or not.
The degree of permission for information reproduction (protection level) could not be made gradual, and the degree of visibility was also constant, and was merely used as a means of unilateral protection of copyright and a charging system.

Therefore, the user can obtain only a deteriorated signal that cannot be distinguished or information that cannot be viewed or even cannot reproduce the data. As a result, the protection is too strict or too loose. For this reason, the user did not listen to the limited information and was not motivated to purchase it, and did not lead to an effect of promoting subscription or an effective billing system.

Here, if the protection level can be set stepwise, it is desirable that the creator can intentionally promote the above-mentioned purchase motivation and participation promotion while protecting the copyright at an arbitrary level. . In addition, compression technology has been heavily used for recent information recording, and encryption and scrambling methods that ignore the compression method and do not consider the compression method have a disadvantage in the playback operation that was created based on the rules of the compressed data configuration when decompressing. The resulting inoperability of the regenerator is also a significant drawback.

An object of the present invention is to enable a stepwise setting of a permission level (protection level) of information reproduction, and in particular, to set a compression parameter of video / audio information compressed and recorded by high-efficiency encoding such as MPEG. Separation, conversion and reorganization, the original compression parameters are encrypted together with the playback control information, connected as additional data, and recorded and played back to protect the copyright of the video and audio information. An object of the present invention is to provide an information processing apparatus which is suitable for compression of information which is not in scramble or the like and which can set data at a public level and which is useful for both users and users.

[0019]

In order to solve the above-mentioned problems, the present invention provides an information processing apparatus having the following constitutions (1) to (10).

(1) (First Embodiment) As shown in FIG. 1, image and / or audio data (ie,
High-efficiency coding (MPE) for image data only, audio data only, and decoded data combining image data and audio data)
The data stream [PVD] composed of the compression parameter [P] and the compressed data [VD] is subjected to the recording signal processing by the recording signal processing.
An information processing apparatus AA for recording data into a data separation circuit 2 that separates and outputs a compression parameter [P] and compressed data [VD] from the data string [PVD], and decodes the compressed data [VD]. At this time, a parameter conversion circuit 4 that outputs a public level compression parameter [PO] obtained by parameter-converting the compression parameter [P] with the public level information [O] designating the public level, and the public level compression parameter [ PO] and a public level data string [POV obtained by combining the compressed data [VD].
D], and the decryption of the compressed data [VD] obtained by adding the protection level information [L] designating whether or not the data can be disclosed and the compression parameter [P]. The protected level compression parameter [LP] is converted to the reproduction control compression parameter [LP1 P2] by the reproduction control information (destination information, grade information) [P1 P2 P3 P4] and the encryption information (encryption key information).
P3], and outputs an encrypted reproduction control compression parameter [Dt] = [L'P1'P2'P3'P4 '] obtained by encryption (addition circuit 15, destination / grade parameter generation circuit 9). , An encryption / reproduction control parameter generation circuit, and a single unit obtained by (multiplexing) combining the public level data string [POVD] and the encryption / reproduction control compression parameter [Dt]. An information processing apparatus, comprising: a recording device 13 for recording a recording data sequence [POVDL'P1'P2'P3'P4 '] onto the recording medium 14 (which is an optical disk).

(2) (Third Embodiment) As shown in FIG. 5, image and / or audio data (ie,
High-efficiency coding (MPE) for image data only, audio data only, and decoded data combining image data and audio data)
The data stream [PVD] composed of the compression parameter [P] and the compressed data [VD] is subjected to the recording signal processing by the recording signal processing.
An information processing device CC that records the compressed data [VD] into a data separation circuit 2 that separates and outputs a compression parameter [P] and compressed data [VD] from the data string [PVD]. A parameter conversion circuit 4 for outputting a public level compression parameter [PO] obtained by performing parameter conversion of the compression parameter [P] with public level information [O] designating the public level; [PO] and a public level data string [POV obtained by combining the compressed data [VD]
D], and the decryption of the compressed data [VD] obtained by adding the protection level information [L] designating whether or not the data can be disclosed and the compression parameter [P]. The protected level compression parameter [LP] is converted to the reproduction control compression parameter [LP1 P2] by the reproduction control information (destination information, grade information) [P1 P2 P3 P4] and the encryption information (encryption key information).
P3], and outputs an encrypted reproduction control compression parameter [Dt] = [L'P1'P2'P3'P4 '] obtained by encryption (addition circuit 15, destination / grade parameter generation circuit 9). , An encryption / reproduction control parameter generation circuit, and the public level data string [POVD] to the recording medium 1 (which is an optical disk).
4A to be recorded in the first recording area (main data area) of 4A
And the encryption / reproduction control compression parameter [Dt] in another recording area of the recording medium 14A different from the first recording area (main data area). A second recording device 26 for performing recording in synchronism with the recording operation of the first recording medium 14A in an appropriate area, an area in which track wobbling recording is performed.

(3) (Fifth Embodiment) As shown in FIG. 7, image and / or audio data (ie,
High-efficiency coding (MPE) for image data only, audio data only, and decoded data combining image data and audio data)
Data compression by high-efficiency coding according to the G1 method) and time-synchronous compression parameter [TMP]
An information processing device EE that processes a data sequence [TMPVD] composed of the following and performs recording signal processing and records the data sequence on a recording medium 14B, and converts a time synchronous compression parameter [TMP] and compressed data [VD] from the data sequence [TMPVD]. A data separation circuit 2 for separating and outputting, and when decoding the compressed data [VD], the time synchronization compression parameter [TM] is specified by public level information [O] designating its public level.
P], a parameter conversion circuit 4 for outputting a time synchronization release level compression parameter [TMPO] obtained by parameter conversion, and a time synchronization release level compression parameter [TMP]
O] and the compressed data [VD], and a data reorganization circuit 5 that outputs a time synchronization release level data sequence [TMPOVD] obtained when the compressed data [VD] is decoded. Protection level information [L] designating whether or not the time synchronization compression parameter [TM]
P] obtained by adding the time synchronization protection level compression parameter [TMLP] obtained by adding the reproduction control information (destination information, grade information) [P1 P2 P3 P4] and the encryption information (encryption key information). [LP
1 P2 P3 P4], and then converts it into an encrypted time-synchronous encrypted reproduction control compression parameter [TM'Dt] = [TM
[L'P1'P2'P3'P4 '] (adder circuit 15,
An encryption / reproduction control parameter generation circuit (consisting of a destination / grade-specific parameter generation circuit 9 and an encryption circuit 11) and the time synchronization release level data string [TMPOV
D] on the first (optical disc) recording medium 14B, and the time synchronous encryption / reproduction control compression parameter [TM′Dt] on the first recording medium 14B. An information processing apparatus, comprising: a second recording device 29 for recording on a second recording medium 30 (which is a floppy disk) in synchronization with an operation.

(4) (Seventh Embodiment) As shown in FIG. 10, image and / or audio data (that is, image data only, audio data only, and decoded data obtained by combining image data and audio data) are efficiently processed. Encoding (M
Compressed data by high-efficiency encoding according to the PEG1 method), and performed the time synchronization compression parameter [TMP]
D] of the data sequence [TMPVD], which processes the recording signal processing of the data sequence [TMPVD] and sends it out to the recording medium 14B or the communication path 34.
D], and a data separation circuit 2 for separating and outputting a time synchronous compression parameter [TMP] and compressed data [VD], and release level information [O] for specifying a release level when decoding the compressed data [VD]. ], A parameter conversion circuit 4 for outputting a time synchronization release level compression parameter [TMPO] obtained by parameter conversion of the time synchronization compression parameter [TMP], the time synchronization release level compression parameter [TMPO] and the compressed data [TMPO]. VD]
Time synchronization release level data string [TMPO
[VD], the data reorganization circuit 5, and the decryption of the compressed data [VD], the protection level information [L] designating whether or not to release the compressed data [VD] and the time synchronization compression parameter [TMP] are added. The time synchronization protection level compression parameter [TMLP] obtained in this manner is converted into reproduction control information (destination information, grade information) [P1 P2 P3 P4
] And encryption information (encryption key information) to convert to a reproduction control compression parameter [LP1 P2 P3 P4] and then encrypt and obtain a time-synchronous encrypted reproduction control compression parameter [TM'Dt] = [TM'L '] P1'P2'P3'P4 '] (comprising an addition circuit 15, a destination / grade parameter generation circuit 9, and an encryption circuit 11); and the time synchronization release level data. A recording device 28 for recording the column [TMPOVD] on the recording medium 14B (which is an optical disk) and a transmitting device 32 for transmitting the time synchronous encryption / reproduction control compression parameter [TM'Dt] to the communication path 34 are provided. An information processing apparatus, characterized in that:

(5) (Ninth Embodiment) As shown in FIG. 12, image and / or audio data (that is, image data only, audio data only, and decoded data obtained by combining image data and audio data) are efficiently processed. Encoding (M
The data stream [PVD] composed of the compression parameter [P] and the compressed data [VD] is subjected to recording signal processing and the communication path 3
4, a data separation circuit 2 that separates and outputs a compression parameter [P] and compressed data [VD] from the data string [PVD], and decodes the compressed data [VD]. A parameter conversion circuit 4 for outputting a public level compression parameter [PO] obtained by performing parameter conversion of the compression parameter [P] with public level information [O] designating the public level; [PO] and a public level data string [POV obtained by combining the compressed data [VD]
D], and the decryption of the compressed data [VD] obtained by adding the protection level information [L] designating whether or not the data can be disclosed and the compression parameter [P]. The protected level compression parameter [LP] is converted to the reproduction control compression parameter [LP1 P2] by the reproduction control information (destination information, grade information) [P1 P2 P3 P4] and the encryption information (encryption key information).
P3], and outputs an encrypted reproduction control compression parameter [Dt] = [L'P1'P2'P3'P4 '] obtained by encryption (addition circuit 15, destination / grade parameter generation circuit 9). , An encryption / reproduction control parameter generation circuit, and a single unit obtained by (multiplexing) combining the public level data string [POVD] and the encryption / reproduction control compression parameter [Dt]. An information processing apparatus, comprising: a transmitting device 37 for transmitting a recording data sequence [POVDL'P1'P2'P3'P4 '] to the communication path 34.

(6) (Second Embodiment) As shown in FIG. 2, a single recording data sequence recorded on the recording medium 14 by the recording signal processing of the information processing apparatus AA described in (1) above is used. Playback signal processing to process image and / or audio data (ie, only image data, only audio data,
An information processing apparatus BB that outputs decoded data obtained by combining image data and audio data).
To reproduce the reproduced data string [POVDL'P1'P2'P3'P
4 '], and from the reproduced data string [POVDL'P1'P2'P3'P4'], the encrypted reproduction control compression parameter [Dt] = [L'P1'P2'P3'P4 '. ]
Are separated and output, and the public level data string [POV
D] and further separates the public level compression parameter [P
O], a data separation circuit 16 for outputting compressed data [VD] obtained by separating and removing, and decryption information (cryptographic key information)
And output the protection level information [L] and the compression parameter [P] obtained by decrypting the encrypted reproduction control compression parameter [Dt] with the reproduction control information (destined information and grade information) (the decryption circuit 18). , Decryption control parameter decryption circuit, and the public level data string [POV
D] and an image obtained by combining the compression parameters and / or
Alternatively, a data rearrangement circuit (multiplex circuit) 22 for encoding audio data with high efficiency and outputting a data sequence [PVD] composed of a compression parameter [P] and compressed data [VD]; Data string [PV
D], and a decoding device 23 that outputs image and / or audio data obtained by complementarily decoding D].

(7) (Fourth Embodiment) As shown in FIG. 6, the first recording area (main data area) of the recording medium 14A by the recording signal processing of the information processing apparatus DD described in (2) above. And the public level data string [POVD] recorded on the recording medium 14A which is different from the first recording area (main data area) (an area which is generally undetectable when reading, track wobbling, etc.). A single recording data sequence recorded on the recording medium 14 is subjected to reproduction signal processing of the encrypted reproduction control compression parameter [Dt] recorded in the recording area) and image and / or audio data (that is, image data). An information processing device DD that outputs only the audio data, the decoded data obtained by combining the image data and the audio data, and reproduces the recording medium 14 and outputs the public level data string [POVD] And encryption reproduction control compression parameter [Dt] = [L'P1'P2'P3'P
4 ′], and a public level compression parameter [PO] from the public level data string [POVD].
And a data separation circuit 16 that outputs compressed data [VD] obtained by removing the encryption and decryption information (decryption key information) and reproduction control information (destination information and grade information). A decryption / reproduction control parameter decryption circuit (consisting of a decryption circuit 18 and a parameter recovery circuit 21) that outputs protect level information [L] and the compression parameter [P] obtained by decrypting Image and / or audio data obtained by combining the compressed data [VD] and the compression parameter [P] with high efficiency encoding, and a data string [PVD] composed of the compression parameter [P] and the compressed data [VD] Data reorganization circuit (multiplex circuit) 22 that outputs
An information processing apparatus comprising: a decoding device 23 that outputs image and / or audio data obtained by complementarily decoding the highly efficient encoded data sequence [PVD].

(8) (Sixth Embodiment) As shown in FIG. 8, the first and second recording media 1 are processed by the recording signal processing of the information processing apparatus EE described in (3).
A single recorded data sequence recorded in 4B, 30 is subjected to reproduction signal processing to output image and / or audio data (ie, only image data, only audio data, and decoded data obtained by combining image data and audio data). An information processing device FF, which is a first reproducing device 1 that reproduces a time-synchronization release level data sequence [TMPOVD] from the first recording medium 14B.
5A and the second recording medium (floppy disk) 3
0 to the time synchronization encryption / reproduction control compression parameter [TM '
Dt], and a data separation circuit for outputting time synchronous compressed data [TMVD] obtained by removing the public level compression parameter [PO] from the time synchronous public level data sequence [TMPOVD]. 16, the protection level information [L] and the compression level obtained by decrypting the encryption / reproduction control compression parameter [Dt] with the decryption information (decryption key information) and the reproduction control information (destination information, grade information). A decryption / reproduction control parameter decryption circuit (consisting of a decryption circuit 18 and a parameter recovery circuit 21) that outputs a parameter [P] is obtained by combining the compressed data [VD] and the compression parameter [P]. Data obtained by efficiently encoding image and / or audio data and comprising compression parameter [P] and compressed data [VD] A data rearrangement circuit (multiplex circuit) 22 for outputting a column [PVD], and a decoding device for outputting image and / or audio data obtained by complementarily decoding the highly efficient encoded data sequence [PVD] 23. An information processing apparatus comprising:

(9) (Eighth Embodiment) As shown in FIG. 11, the information is recorded on the recording medium 14B by the recording signal processing of the information processing device GG described in (4) and sent to the communication path 34. The single recorded data stream is reproduced and processed for image and / or audio data (ie,
An information processing device HH that outputs only image data, only audio data, and decoded data obtained by combining image data and audio data), and a reproducing device 15 that reproduces a time synchronization public level data sequence [TMPOVD] from the recording medium 14B.
A, a receiving device 36 for receiving and reproducing the time synchronous encryption / reproduction control compression parameter [TM'Dt] from the communication path 34,
A data separation circuit 16 for outputting time synchronization compressed data [TMVD] obtained by removing the disclosure level compression parameter [PO] from the time synchronization disclosure level data string [TMPOVD]; decryption information (decryption key information); The encrypted playback control compression parameter [Dt] obtained by decrypting the playback control information (destined information, grade information),
A decryption / reproduction control parameter decryption circuit (consisting of a decryption circuit 18 and a parameter reproduction circuit 21) for outputting the protection level information [L] and the compression parameter [P], and the compressed data [VD] and the compression A data reorganization circuit (FIG. 1) that highly efficiently encodes image and / or audio data obtained by combining parameters [P] and outputs a data sequence [PVD] composed of a compression parameter [P] and compressed data [VD] ( Multiplex circuit) 22;
An information processing apparatus, comprising: a decoding device 23 that outputs image and / or audio data obtained by complementarily decoding this highly efficient encoded data sequence [PVD].

(10) (Tenth Embodiment) As shown in FIG. 13, a single recording data stream sent to the communication path 34 by the recording signal processing of the information processing apparatus II described in (6) above is An information processing apparatus JJ which receives and outputs image and / or audio data (that is, image data only, audio data only, and decoded data obtained by combining image data and audio data). A receiving device 40 for receiving and reproducing the sequence [POVDL'P1'P2'P3'P4 '], and a reproduction data sequence [POVD'
L'P1'P2'P3'P4 '], an encryption / reproduction control compression parameter [Dt] = [L'P1'P2'P3'P4'] is separated and output, and a public level data string [POVD] is separated. And a data separation circuit 1 for outputting compressed data [VD] from which the public level compression parameter [PO] has been separated and removed.
6, protect level information [L] and the compression level obtained by decrypting the encryption / reproduction control compression parameter [Dt] with decryption information (decryption key information) and reproduction control information (destination information, grade information). It is obtained by combining the decryption / reproduction control parameter decryption circuit (which comprises the decryption circuit 18 and the parameter reproduction circuit 21) that outputs the parameter [P], the public level data string [POVD], and the compression parameter. A data sequence [PVD] that encodes image and / or audio data with high efficiency and includes a compression parameter [P] and compressed data [VD]
Data reorganization circuit (multiplex circuit) 2 that outputs
2. An information processing apparatus, comprising: a decoding device 23 that outputs image and / or audio data obtained by complementarily decoding the highly efficient encoded data sequence [PVD].

As described above, on the data recording or sending side, when the image and / or sound coded by the high-efficiency coding is signal-processed and recorded on a recording medium or sent to a communication path, the data is compressed. The compression parameter and the compressed data are separated from the original data that has been separated, and the information indicating the information disclosure level when the separated compression parameter is restored is converted so that the restored information becomes the publication level intended by the creator. Then, the public level compression parameter and the separated original compressed data are combined to form public data in a format compatible with the original data.

Also, the compression parameter separated from the original data is encrypted with the encryption key information to generate additional data which is not easily illegitimately used, and the public data and the additional data are combined or outputted separately. . Therefore,
A decoder having only a normal processing function can only recover information in a limited range of the public level, and a device having a predetermined signal processing device and a normal decoder and having a cryptographic recovery key input receives the original image and sound. Another object of the present invention is to provide a signal processing device capable of generating a signal capable of restoring both pieces of information.

Further, on the receiving side, when the signal on which the signal processed by the signal processing device is reproduced or the information which is transmitted or received is signal-processed, the compressed data included in the public data is extracted from the received data. And additional data, and for authorized users (or subscribers or charged users), the separated additional data is encrypted with the decryption key information of the encryption distributed only to authorized users. To restore the original compression parameters, combine the already separated compressed data with the decompressed compression parameters to reorganize them into a format that can be decompressed by a normal decoding device, and to an unspecified number of users (or (Subscribers, users who have not been charged), usually restore the compressed data to the original data consisting of images, sound or both while leaving the data at the public level as it is And an apparatus for performing signal processing for restoring an image, sound, or both with the decoding device.

(Operation of Switching Compression Parameters) As described above, in the compression process, for example, the MPEG system uses many compression parameters (conversion tables and the like). For example, a “motion vector” for guaranteeing motion, a “slice start code” or a “macroblock address” indicating a position in the frame by dividing the frame into a set of pixels such as a slice or a macroblock in order to perform DCT A "quantization matrix" as a quantization table, a "VLC table" for VLC of various data, and the like are used.

Therefore, these parameters are converted into data different from the original data so as to be compatible with a standard bit stream. In order to obtain the intended image, the original parameter data is encrypted and attached separately so that it cannot be easily used as described later.

(Operation of Encryption) On the decompression side, only the information of the above-mentioned public level can be decompressed for the input data without the decipher key, and if there is a decipher key obtained after purchasing or subscribing, The compression parameters for obtaining the original information can be restored. Alternatively, input data that is not normally protected can be restored regardless of the presence or absence of a decryption key.

Although the encryption used here is relatively useful for copyright protection even with relatively simple bit shift and bit rotation, the DES method, public key encryption, FEAL method, etc. By adopting, more advanced copyright protection and prevention of unauthorized use can be realized.

(Operation of Charging System by Distribution of Encryption and Decryption Keys) A decryption key is required for restoring encrypted compression parameters, and distribution of the decryption key realizes an effective charging system. I do. In other words, the user (including the case of regular purchase or subscription) charged by inputting the encryption decryption key to the restoration-side signal processing device of claim 2 can use the above-described original parameter data to obtain the original information. You will get

[0038]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An information processing apparatus according to the present invention will be described below with reference to FIGS. FIG. 1 is a block diagram of a first embodiment of the information processing apparatus of the present invention for recording information in the same recording area on the same storage medium, and FIG. 2 reproduces information recorded in the same recording area on the same storage medium. FIG. 3 is a diagram showing the structure of compressed data according to the MPEG1 system, FIG. 4 is a diagram illustrating the operation of the information processing device according to the present invention based on reproduction control information, and FIG. FIG. 6 is a block diagram of a third embodiment of the information processing apparatus of the present invention for recording information subjected to signal processing in two different data areas on the same storage medium. FIG. 6 shows two different data areas on the same storage medium. FIG. 7 is a block diagram of an information processing apparatus according to a fourth embodiment of the present invention which reproduces information which has been subjected to signal processing and which has been recorded on a storage medium. FIG. FIG. 8 shows two types of storage media. FIG. 9 is a block diagram of an information processing apparatus according to a sixth embodiment of the present invention for reproducing information recorded and subjected to signal processing, FIG. 9 is a view showing time synchronization information included in input data according to the MPEG1 system, and FIG. And FIG. 11 is a block diagram of an information processing apparatus according to a seventh embodiment of the present invention, which records information recorded on a storage medium and transmits the information through a non-package communication path. Of an information processing apparatus according to the present invention for receiving information subjected to
FIG. 12 is a block diagram of a ninth embodiment of the information processing apparatus of the present invention for transmitting signal-processed information through a non-package communication channel, and FIG. It is a 10th Example block diagram of the information processing apparatus of this invention which receives on a communication channel.

(First Embodiment) (Configuration of Information Processing Apparatus AA Used as Recording Side) As shown in FIG. 1, an information processing apparatus AA according to the present invention transmits recorded data (compressed data sequence) to the same recording medium. It has a configuration suitable for recording in the same recording area, and includes a data separation circuit 2, a parameter conversion circuit 4, a data reorganization circuit 5,
It comprises a multiplex (MUX) circuit 12, a recording device 13, an adder circuit 15, a destination / grade-specific parameter generation circuit 9, and an encryption circuit 11. In the figure, 1 is a data input terminal, 3 is a public level information input terminal, 6 is a protect level information input terminal, 7 is a destination information input terminal, 8
Denotes a grade information input terminal, 10 denotes an encryption key information input terminal, and 14 denotes a recording medium (optical disk).

The recording device 13 may be detached from the information processing device AA if necessary.
The information processing device from which the recording device 13 has been removed can perform a signal processing operation similar to that of the information processing device AA by being connected to a separate recording device.

The above data input terminal 1 is an MPEG1
One of the image data alone, the audio data only, and the composite data composed of the image data and the audio data, which has been compressed by the high-efficiency encoding according to the system, is a series of data strings [P
VD].

The data separation circuit 2 separates and outputs the data sequence [PVD] input from the data input terminal 1 into a compression parameter [P] and compressed data [VD].

The above-mentioned open level information input terminal 3 is open level information [O] indicating the open level intended by the creator.
Is an input terminal to which is supplied.

The parameter conversion circuit 4 described above converts the compression parameter [P] separated and output by the data separation circuit 2 into
Based on the public level information [O] supplied from the public level information input terminal 3 (ie, when the data string [PVD] is decrypted (restored), the public level indicated by the public level information [O] is reproduced. This is a circuit that outputs data (so that it becomes image data, audio data, and decoded data thereof) and the converted public level compression parameter [PO].

The above-mentioned data reorganization circuit 5 is a circuit for reorganizing the compression parameter [P] in the data string [PVD] composed of the compression parameter [P] and the compressed data [VD]. The public level compression parameter [PO] output from the parameter conversion circuit 4 is used instead of the compression parameter [P]. As a result, the data reorganization circuit 5 outputs a public level data string [POVD].

The above-mentioned protect level information input terminal 6
Is a recording data string [PO
VDL'P1'P2'P3'P4 '] when playing back (an information processing device BB used as a playback side described later)
And how the compressed data [VD] should be reproduced (for example, which one of the two types of images is reproduced, Alternatively, it is an input terminal to which protect level information [L] indicating whether or not to reproduce both partial images simultaneously is supplied.

The above-mentioned destination information input terminal 7 is an input terminal to which destination information for setting specifications according to a region (for example, by country) to which the information processing apparatus AA is shipped is supplied. The above-mentioned grade information input terminal 8 is an input terminal to which grade information for performing a stepwise disclosure level setting by the playback device (information processing device BB) is supplied. These destination information and grade information are combined with playback control information [P1 P2 P3 P
4].

The destination / grade parameter generation circuit 9 adds the compression parameter [P] separated and output by the data separation circuit 2 and the protection level information [L] supplied from the protection level information input terminal 6. This circuit converts the protection level compression parameter [LP] into the reproduction control compression parameter [LP1 P2 P3 P4] based on the reproduction control information [P1 P2 P3 P4].

The above-described encryption key information input terminal 10
Input terminal to which encryption key information for copyright protection and billing system is supplied.

The above-mentioned encryption circuit 11 encrypts and reproduces the reproduction control compression parameter [LP1 P2 P3 P4] converted by the destination / grade parameter generation circuit 9 so that it cannot be easily used by the encryption key information. This circuit outputs a control compression parameter [Dt] = [L'P1'P2'P3'P4 '].

The multiplexing circuit 12 described above outputs a public level data string [PO
VD] and an encryption / reproduction control compression parameter [L'P1'P2'P3'P4 '] output from the encryption circuit 11 are multiplexed (multiplexed) to form a single recorded data string [POVD
L'P1'P2'P3'P4 '].

The recording device 13 described above records the recording data string [POVDL'P1 '] output from the multiplex circuit 12.
[P2'P3'P4 '] is recorded on the recording medium 14 to process the recording signal.

The above-described adder 15 adds a protect level compression parameter [LP] obtained by adding the compression parameter [P] output from the data separation circuit 2 and the protect level information [L] supplied from the protect level information input terminal 6. ] To the destination / grade-specific parameter generation circuit 9.

Second Embodiment (Configuration of Information Processing Apparatus BB Used as Reproducing Side) Now, the information processing apparatus AA used as the above-described recording side
The information processing apparatus BB of the present invention having a configuration complementary to
As shown in FIG. 2, it has a configuration suitable for reproducing recorded data recorded in the same recording area on the same recording medium, and includes a reproducing device 15A, a data separating circuit 16, a decoding circuit 18, It comprises a parameter reproducing circuit 21, a multiplex (MUX) circuit 22, and a decoding device 23. In the figure, reference numeral 14 stores data recorded and processed by the information processing apparatus AA. 17 is a decryption key information input terminal, 19 is a destination information input terminal, 20 is a grade information input terminal, and 24 is an output terminal.

The reproducing device 15A may be detached from the information processing device BB if necessary. In this case, the information processing device from which the reproducing device 15A has been removed must be connected to a separate reproducing device. Accordingly, the same signal processing operation as that of the information processing device BB can be performed.

The above-described reproducing apparatus 15A is provided with the recording medium 14
Reproduced data string [POV
DL'P1'P2'P3'P4 '].

The above-mentioned data separation circuit 16 outputs a reproduced data string [POVDL'P1'P] output from the reproducing device 15A.
2′P3′P4 ′] from the encryption / reproduction control compression parameter [D
t] = [L'P1'P2'P3'P4 '] is separated and output, the public level data sequence [POVD] is separated, and the compressed data [VD] from which the public level compression parameter [PO] is separated and removed is obtained. Output.

The decryption key information input terminal 17 described above
Is an input terminal to which decryption key information for decrypting the encryption / reproduction control compression parameter [Dt] is supplied.

The decryption circuit 18 decrypts the encryption / reproduction control compression parameter [Dt] separated and output by the data separation circuit 16 based on the decryption key information input from the decryption key information input terminal 17. This is a circuit for outputting a reproduction control compression parameter [LP1 P2 P3 P4].

The above-mentioned destination information input terminal 19 is an input terminal to which destination information for setting specifications according to a region (for example, by country) to which the information processing apparatus BB is shipped is supplied.
The above-mentioned grade information input terminal 20 is an input terminal to which grade information for performing stepwise disclosure level setting is supplied.

The parameter reproducing circuit 21 described above uses the destination, grade information and protect level information [L] to determine
An optimal compression parameter [P] among the decrypted parameters [P1 P2 P3 P4] is output. Protect level information [L] necessary for reproduction control is output from the parameter reproduction circuit 21 to the reproduction device 15A and the decoding device 23 as control information for reproduction. On the other hand, the compression parameter [P] is output to the multiplex circuit 22.

The multiplexing circuit 22 outputs the compressed data [VD] separated and output by the data separating circuit 16.
And a compression parameter [P] output from the parameter reproduction circuit 21 to multiplex and compose and output a series of data strings [PVD].

The above-mentioned decoding device 23 is a device for restoring (expanding) and outputting a series of compressed data strings [PVD].

(Information processing apparatus A used as recording side)
A. Signal processing of A) Next, the information processing apparatus AA having the above configuration
Will be described. The signal processing example described here is a case where the quantization parameter is changed and the data of the public level (public level compression parameter [PO]) is set and recorded.

FIG. 3A shows an example of video (image) data (bit stream) obtained by compressing the structure of a series of data strings [PVD] input from the data input terminal 1 by high-efficiency encoding according to the MPEG1 system. ) To FIG. 3 (G).

FIG. 3A shows a video sequence layer (for example, image size and image rate) of a series of video data signals, and FIG. 3B shows a random access unit (for example, from the beginning of the sequence). The GOP layer, which is the minimum unit of a screen group (such as time), is a picture layer (for example, in an image encoding mode (picture type)) which is an attribute common to one screen, and FIG. Is a slice layer (for example, of a quantization characteristic value) which is information common to small screens obtained by dividing one screen into arbitrary lengths;
FIG. 7E shows a macro block layer (for example, a motion vector value) common to pixel blocks (macro blocks) obtained by further dividing the slice layer, and FIG. 7F shows a block layer structure of the transform coefficient itself. Things.

Here, a quantization scale area of a macroblock layer (shown by oblique lines in FIG. 3E) is used as a place for storing the compression parameter [P] (public level compression parameter [PO]). Then, as shown in FIG. 3 (G), a series of compressed video data strings [PVD]
Are sequentially stored as “compression parameter [P] and compressed data [VD]”.

First, a series of data strings [PVD] previously compressed according to the MPEG1 compression standard (FIG. 3 (G)
Is input to the data input terminal 1 of the information processing apparatus AA (shown in FIG. 1). The data separation circuit 2 monitors the input data string [PVD] and separates the data string into the compression parameter [P] and the compressed data [VD] corresponding to the data change. Of the separated data, the compressed data [VD] that does not require signal processing is directly used as the data reorganization circuit 5
Is output to

The parameter conversion circuit 4 processes the input compression parameter [P], and changes the compression parameter [P] so that it is restored (expanded) to a public level intended by the creator or the like in advance. Release level information [O] has been input. For example, in this embodiment, a quantization scale (shown by oblique lines in FIG. 3E) is used as a parameter to be changed.
If a value (“0”, “1”) image is used, the content of the restored image can be understood to some extent, but the image is far from the original image.

The compression parameter [P] separated and output by the data separation circuit 2 is converted by the parameter conversion circuit 4 based on the public level information [O] and output as a public level compression parameter [PO]. Of course, other compression parameters can be used instead of the compression parameter [P]. For example, the same effect can be obtained by intentionally shifting the “motion vector”, changing the “slice start code” or the “macroblock address”, and changing the display position during restoration (expansion).

In the data reorganization circuit 5, the compressed data [VD] output from the data separation circuit 2 and the public level compression parameter [P
O], and generates and outputs a public level data string [POVD] in a format compatible with the input data string [PVD] (shown in FIG. 3G).

The reconstructed public level data string [POVD] can be restored (expanded) by public level information by a normal decoding device (decoding device 23 shown in FIG. 2). Unlike encryption and scrambling methods that are ignored without consideration, they are created based on the rules of compressed data configuration when decompressing, so there is no inconvenience in the playback operation and there is no possibility that the playback machine will not be able to operate With benefits.

On the other hand, the compression parameter [P] separated from the series of data strings [PVD] input to the data input terminal 1 by the data separation circuit 2 is reproduced at the time of reproduction input from the protect level information input terminal 6. Input to the destination / grade-specific parameter generation circuit 9 as a protection level compression parameter [LP] to which protection level information [L], which is playback control information for controlling the operation of the restoration (expansion) decoder of the machine, image and audio, is added. Is done.

Destination / grade-specific parameter generation circuit 9
Then, the protection level compression parameter [LP] is changed to the reproduction control information [P1 by combining various types of information input from the destination information input terminal 7 and the grade information input terminal 8.
P2 P3 P4], the playback control compression parameter [L
P1 P2 P3 P4].

This reproduction control compression parameter [LP1 P2
[P3 P4] is input to the encryption circuit 11, and the encryption / reproduction control compression parameter [which cannot be easily deciphered by the encryption key information from the encryption key information input terminal 10 using a predetermined DES, FEAL, public encryption method, or the like, for example] Dt]
= [L'P1'P2'P3'P4 '].

The public level data string [POVD] from the data reorganization circuit 5 and the encryption / reproduction control compression parameter [Dt] output from the encryption circuit 11 are recorded in the same recording area on the recording medium 14 in a multi Plex circuit 1
2 and a single recording data string [POVDL '
P1'P2'P3'P4 ']. This data string [POVDL'P1'P2'P3'P4 '] is recorded on the recording medium 14 by the recording device 13.

Thus, the information processing apparatus A having the above configuration
The recording signal processing of A is executed.

(Information processing apparatus B used as reproduction side)
B) Next, the information processing apparatus BB having the above configuration
Will be described.

The recording medium 14 has recorded thereon a data string which has been subjected to recording signal processing by the information processing apparatus AA used as the recording side described above, and the reproducing apparatus 15A records the reproduced data (data string [POVDL'P1'P2 'P3'P4'])
To play as.

This data string [POVDL'P1'P2'P3 '
P4 '] is a public level data string [POVD] and an encryption / reproduction control compression parameter [Dt] = [L'P1'P2'P3'P
4 ′], and has signal processing means (data separation circuit 16, decoding circuit 18, parameter reproduction circuit 21, multiplex (MUX) circuit 22) of the present invention at the next stage of reproduction device 15A. In the case of a reproducing apparatus having no data, this data string [POVDL'P1'P2'P3'P4 '] is directly input to the decoding apparatus 23 through the dotted line path aa in FIG. Decoding (restoration) so as to be reproduced data of the public level indicated by the public level information [O] set in the recorded signal processing performed
Be transformed into Here, the encryption reproduction control compression parameter [Dt
] Is a data (stream) ID different from the image or audio
Therefore, the restoration (expansion) is not affected.

The data string [P reproduced by the reproducing device 15A
OVDL'P1'P2'P3'P4 '] are all data separation circuits 1.
6 and as described above, the compression parameter [P
O] and an encryption / reproduction control compression parameter [Dt].

The decryption circuit 18 uses the decryption key information input from the decryption key information input terminal 17 to perform the same predetermined processing as that performed in the recording signal processing of the information processing apparatus AA, such as DES, FEAL, and public encryption. Encryption / reproduction control compression parameter [Dt] = [L '
P1'P2'P3'P4 '] to the original playback control compression parameter [LP1 P2 P3 P4].

The reproduction control compression parameter [LP1 P2 P3 P4] decoded based on the reproduction condition set by the information processing apparatus BB is used as the destination information input terminal 19.
And a reproduction device 15A and a decoding device 2 by a parameter reproduction circuit 21 based on information of a grade information input terminal 20.
3 is reproduced to the protection parameter [P] selected from the protection level information [L] and the reproduction condition.

For example, the reproduction control information means the reproduction device 1
5A is a method of realizing only the reproduction of a specific portion by skipping and reproducing the data of the specific portion recorded on the recording medium 14 by controlling the decoding device 23, and controlling the decoding device 23 to reproduce the data to be restored (expanded). This is information for restriction.

As an example, a case where a movie contains an image that cannot be disclosed in a specific country / region will be described with reference to FIGS. 4 (A) to 4 (D). FIG. 4A shows the recording medium 1.
4 (= [PVD]) d1, d2
, D8. Here, the data d3 and d6 (hatched portions in the figure) are image data that cannot be disclosed if disclosure is limited by protect level information, destination information, and grade information. Here, all image parts that cannot be disclosed in the above-mentioned countries and regions are included. For this reason, in countries where disclosure is not limited, as shown in FIG. 4B, all data d1, d2,..., D8 shown in FIG. 4A are restored and displayed. However, in countries where access is limited,
By controlling the operation of the reproducing device 15A so as not to reproduce the data d3 and d6 shown in FIG.
3, d6 is skipped and data d1, d2, d
4, d5, d7 and d8 are reproduced, and limited reproduction without reproducing data d3 and d6 is realized.

In addition to the above-described limited playback control,
As shown in FIG. 4D, while the data d3 and d6 are being read, the decoder 23 is controlled to control the immediately preceding data d2 and d6.
Decoding may be resumed as soon as reading of data d3 and d6 is completed while d5 is held in a still image state.

Further, when the user inputs a limited playback condition obtained from playback data for setting the playback device 15A,
For example, a movie that is not suitable for children, such as an adult movie, is not allowed to be played back, or even if played back, the image content cannot be discriminated as in the case of control with the disclosure level information. It is also possible to make the screen a blurred image, or to hold the screen as a still image in a portion that is not desired to be reproduced under the control of the decoding device 23, as described above.

Parameter reproducing circuit 2 of information processing device BB
1, the compression parameter [P] reproduced together with the compressed data [VD] from the data separation circuit 16 is combined by the multiplexing circuit 22 into a data string [PVD] that can be restored (expanded) by the decoding device 23 and decoded. The image is restored (expanded) by the device 23 and is reproduced and output through the output terminal 24.

Thus, the information processing apparatus B having the above configuration
The reproduction signal processing of B is executed, and information of various image patterns can be output by operating the compression parameter while sharing the compressed data having a huge amount of data compared to the compression parameter.

(Third Embodiment) (Information Processing Apparatus CC Used as Recording Side) As shown in FIG. 5, an information processing apparatus CC according to the present invention includes a public level data string [POVD] and an encryption / reproduction control compression parameter. [Dt] is recorded in a different recording area on the same recording medium, and the multiplex circuit 12 in the configuration of the information processing apparatus AA (shown in FIG. 1) is used. Then, the recording devices 25 and 26 are newly provided, and the output side of the data reorganization circuit 5 and the input side of the recording device 25 are connected, and the output side of the encryption circuit 11 and the input side of the recording device 26 are connected. It has the same configuration as the one connected.

That is, the information processing apparatus CC of the present invention comprises a data separation circuit 2, a parameter conversion circuit 4, a data rearrangement circuit 5, a multiplex (MUX) circuit 12, and an addition circuit 1.
5, a destination / grade-specific parameter generation circuit 9, an encryption circuit 11, and recording devices 25 and 26. 14A
Is a recording medium (optical disk provided with wobbles). The same components as those described above are denoted by the same reference numerals, and description thereof will be omitted.

The information processing device CC having the above configuration is almost the same as the recording signal processing of the information processing device AA (shown in FIG. 1), but the encryption / reproduction control compression parameter [Dt] = [L ′ P1] [P2'P3'P4 '] to perform recording signal processing to enhance the confidentiality.

That is, in order to enhance the confidentiality of the encryption / reproduction control compression parameter [Dt] output from the encryption circuit 11, the public level data string [POVD] and the encryption / reproduction control compression parameter [Dt] are as follows. ] Is separately recorded.

The public level data sequence [POVD] is output from the data reorganization circuit 5 and recorded by the recording device 25 in the main data area of the recording medium 14A. The encryption / reproduction control compression parameter [Dt] is output from the encryption circuit 11 and is an area other than the main data area of the recording medium 14A by the recording device 26 (that is, an area which is generally undetectable when read out, For example, it is recorded in a region adjacent to both sides of a signal track for performing track wobbling recording used for address recording of a write-once CD or the like) in synchronization with the recording operation of the recording device 25.

(Fourth Embodiment) (Configuration of Information Processing Apparatus DD Used as Reproduction Side) Now, the information processing apparatus CC used as the recording side described above.
The information processing device DD of the present invention having a configuration complementary to
As shown in FIG. 6, a public level data string [POVD] and an encryption / reproduction control compression parameter [Dt] are suitable for reproducing recorded data recorded in different recording areas on the same recording medium. An output terminal 27a that replaces the playback device 15A in the configuration of the information processing device BB (shown in FIG. 2) with the playback device 27 and outputs the public level data string [POVD] of the playback device 27 And the input side of the data separation circuit 16 and the same configuration as that in which the output terminal 27b of the reproducing device 27 for outputting the encrypted reproduction control compression parameter [Dt] and the input side of the decryption circuit 18 are connected. It is.

That is, the information processing apparatus DD of the present invention comprises a data separation circuit 16, a decoding circuit 18, a parameter reproduction circuit 21, a multiplex (MUX) circuit 22, a decoding device 23, and a reproduction device 27. A recording medium 14A stores data recorded by the information processing device CC. The same components as those described above are denoted by the same reference numerals, and description thereof will be omitted.

The information processing apparatus DD having the above-described configuration is almost the same as the signal processing of the above-described information processing apparatus BB (shown in FIG. 2).
And a function of reading and reproducing the public level data string [POVD] from the main data area of the data area and reading and reproducing the encrypted reproduction control compression parameter [Dt] from an area other than the main data area (for example, a wobbled area). Output terminal 27 outputs the public level data string [POVD] of the area.
a and reproduce and output the encrypted reproduction control compression parameter [Dt] from the output terminal 27b.

However, the output terminal 27a of the reproducing device 27
In the case of an ordinary reproducing device having no signal processing means (data separating circuit 16, decoding circuit 18, parameter reproducing circuit 21, multiplexing circuit 22) according to the present invention subsequent to the first stage, the signal is output from the output terminal 27a. The public level data string [POVD] is directly input to the decoding device 23 through the dotted line path bb in FIG.
C is decoded (restored) so as to be reproduced data of the public level indicated by the public level information [O] set in the recording signal processing performed by C. Here, since the encryption / reproduction control compression parameter [Dt] has a data (stream) ID different from that of an image or sound, it does not affect the restoration (expansion).

Fifth Embodiment (Information Processing Apparatus EE Used as Recording Side) As shown in FIG. 7, an information processing apparatus EE according to the present invention uses a time synchronization public level data string [TMPOVD] and time synchronization encryption. Reproduction control compression parameter [TM'Dt] = [TM'L'P1 '
P2′P3′P4 ′] in a recording area on a different recording medium, and a multiplex circuit in the configuration of the information processing apparatus AA (shown in FIG. 1). 12, the recording device 13 is removed, recording devices 28 and 29 are newly provided, and the output side of the data reorganization circuit 5 and the recording device 28
And the input side of the encryption circuit 11 is connected to the input side of the recording device 29.

That is, the information processing apparatus EE of the present invention comprises a data separation circuit 2, a parameter conversion circuit 4, a data rearrangement circuit 5, an addition circuit 15, a destination / grade-specific parameter generation circuit 9, an encryption circuit 11, a recording device. 28 and 29. 14B is a recording medium, 30 is a floppy disk (FD). The same components as those described above are denoted by the same reference numerals, and description thereof will be omitted.

The information processing apparatus EE having the above configuration is almost the same as the recording signal processing of the information processing apparatus AA (shown in FIG. 1), except that the time synchronization release level data string [TMPOVD] is stored on the recording medium 14B. In the recording area, and a time synchronous encryption / reproduction control compression parameter [T
M ′ Dt] is recorded in the recording area on the floppy disk 30 in a time-synchronized manner, thereby performing signal processing for increasing the confidentiality of the encryption / reproduction control compression parameter [Dt].

Time synchronization release level data string [TMPOV
D] is output from the data reorganization circuit 5 and
Is recorded in the main data area of the recording medium 14B. Time synchronous encryption / reproduction control compression parameter [TM'Dt]
Is output from the encryption circuit 11 and stored in the data area on the floppy disk 30 by the recording device 29 by the recording device 28.
Time synchronization release level data string [TMPOVD]
It is recorded while synchronizing with the recording process of.

(Sixth Embodiment) (Configuration of Information Processing Apparatus FF Used as Reproduction Side) Now, the information processing apparatus EE used as the recording side described above.
The information processing device FF of the present invention having a configuration complementary to
As shown in FIG. 8, the time synchronization release level data string [TM
POVD] and time synchronous encryption / reproduction control compression parameter [TM'Dt] = [TM'L'P1'P2'P3'P4 '] Has a configuration suitable for playback
The configuration is the same as that in which a playback device 31 is newly added to the configuration of the information processing device BB (shown in FIG. 2) described above, and the input side of the decoding circuit 18 is connected to the output side of the playback device 31.

That is, the information processing device FF of the present invention comprises a data separation circuit 16, a decoding circuit 18, a parameter reproduction circuit 21, a multiplex (MUX) circuit 22, a decoding device 23, and reproduction devices 15A and 31. . 14B
Is a recording medium storing a time-synchronization release level data sequence [TMPOVD] recorded and processed by the information processing device EE. 30 is a time-synchronous encryption / reproduction control compression parameter recorded and processed by the information processing device EE. Floppy disk storing [TM'Dt].
The same components as those described above are denoted by the same reference numerals, and description thereof will be omitted.

The information processing device FF having the above-described configuration is almost the same as the signal processing of the above-described information processing device BB (shown in FIG. 2), but the reproducing device 15A performs time synchronization release from the main data area of the recording medium 14B. Level data string [TMP
OVD], and the reproducing device 31 has a function of reading and reproducing the time synchronous encrypted reproduction control compression parameter [TM'Dt] from the data area of the floppy disk 30.
31 is a time synchronization release level data string [TMPO
VD] and the time synchronous encryption / reproduction control compression parameter [T
M ′ Dt].

However, the output terminal 15 of the reproducing device 15A
In the case of a normal reproducing device having no signal processing means (data separating circuit 16 and multiplexing circuit 22) according to the present invention following the stage a, the time synchronization public level data string [TMPOVD] output from the output terminal 15a Is input directly to the decoding device 23 through the dotted line path cc in FIG. 8, and the public level indicated by the public level information [O] set in the recording signal processing performed by the information processing device EE described above. The data is decoded (restored) so as to be reproduced data.
Here, the time synchronization encryption / reproduction control compression parameter [TM '
Dt] is data (stream) I different from image and sound
Since it has D, there is no effect on the restoration (expansion).

The time synchronization data string [TMPVD] input to the data separation circuit 2 (shown in FIG. 7) via the data input terminal 1 is an MPEG pack (ISO1
1172 layer) packet structure (shown in FIG. 9A)
The packet data (Pack data) constituting the packet structure includes time synchronization information [TM] for synchronizing images and audio.

The pack data includes a system header (shown in FIG. 9B) and a video sector (FIG. 9C).
, And audio sectors (shown in FIG. 9D), for example, in a time-division manner. In a PTS (Presentation Time Sttamp, reproduction output time management information constituting a video sector, which is indicated by hatching in FIG. 9C), time synchronization information [TM] for audio synchronization is stored. In addition, a PTS (shown by oblique lines in FIG. 9D) constituting the audio stores time synchronization information [TM] for image synchronization.

Therefore, the time synchronization information [TM] for synchronizing the image and the audio is recorded on two media (recording media 14 and 14).
B, floppy disk 30) can be used for recording the time synchronization release level data string [TMPOVD] and the time synchronization encryption / reproduction control compression parameter [TM'Dt] and for synchronizing the reproduction data. According to the signal processing of the present invention, since the compression parameter (time synchronization information [TM]), which is a relatively small amount of data, is used, the recording medium of the additional data (time synchronization disclosure level data sequence [TMPOVD]) is about a floppy disk. The system can be realized with the capacity of.

(Seventh Embodiment) (Information Processing Apparatus GG Used as Recording Side) As shown in FIG. 10, an information processing apparatus GG according to the present invention stores a time synchronization release level data sequence [TMPOVD] on a recording medium. It has a configuration suitable for recording in the recording area and transmitting the time-synchronous encryption / reproduction control compression parameter [TM'Dt] through a communication path. The information processing apparatus EE (shown in FIG. 7) The configuration is the same as that in which the recording device 29 in the configuration is removed, a communication device (transmission device) 32 is newly added, and the output side of the encryption circuit 11 and the input side of the communication device 32 are connected. That is, the information processing device GG of the present invention includes a data separation circuit 2, a parameter conversion circuit 4, a data reorganization circuit 5,
It comprises an addition circuit 15, a destination / grade-specific parameter generation circuit 9, an encryption circuit 11, a recording device 28, and a communication device 32. 14B is a recording medium, 34 is a communication path. The same components as those described above are denoted by the same reference numerals, and description thereof will be omitted.

The information processing apparatus GG having the above configuration is almost the same as the signal processing of the information processing apparatus EE (illustrated in FIG. 7), except that the time synchronization release level data train [TM
POVD] is recorded in a recording area on the recording medium 14B, and the time synchronous encryption / reproduction control compression parameter [TM'Dt] is recorded.
Is transmitted via the communication device 32 and the communication path 34, thereby performing transmission (recording) signal processing for enhancing the confidentiality of the encryption / reproduction control compression parameter [Dt].

That is, the time synchronization release level data string [TM
POVD] is output from the data rearrangement circuit 5 and recorded by the recording device 28 in the main data area of the recording medium 14B. Time synchronous encryption / reproduction control compression parameter [TM'D
t] is output from the encryption circuit 11 and transmitted via the communication device 32, the transmission terminal 33, and the communication path.

(Eighth Embodiment) (Configuration of Information Processing Apparatus HH Used as Reproduction Side) Now, the information processing apparatus GG used as the recording side described above.
The information processing apparatus HH of the present invention having a configuration complementary to
As shown in FIG. 11, the time synchronization release level data string [T
MPOVD] in a recording area on a recording medium, and a time synchronization encryption / reproduction control compression parameter [TM'D
[t] has a configuration suitable for reproducing the recorded data transmitted through the communication path. Instead of the reproducing apparatus 31 having the configuration of the information processing apparatus FF (shown in FIG. 8), a communication apparatus (receiving This device has the same configuration as that in which a communication device 36 is newly added and the input side of the decoding circuit 18 is connected to the output side of the communication device 36.

That is, the information processing apparatus HH of the present invention comprises a reproducing apparatus 15A, a data separating circuit 16, a decoding circuit 18, a parameter reproducing circuit 21, a multiplex (MUX) circuit 22, a decoding apparatus 23, and a communication apparatus 36. Is done. 14B is a recording medium, 34 is a communication path, and 35 is a receiving terminal. The same components as those described above are denoted by the same reference numerals, and description thereof will be omitted.

The information processing apparatus HH having the above-described configuration is almost the same as the signal processing of the above-described information processing apparatus FF (shown in FIG. 8), except that the reproducing apparatus 15A performs time synchronization release from the main data area of the recording medium 14B. Level data string [TMP
OVD], the communication device 36 has a function of reading and reproducing the time synchronous encryption / reproduction control compression parameter [TM'Dt] supplied from the communication path 34 via the receiving terminal 35, and reproduces the time of the main area. The time synchronization encryption / reproduction control compression parameter [TM'Dt] is reproduced together with the synchronization release level data string [TMPOVD].

As described above, the information processing apparatuses GG and HH of the present invention described above are different from the information processing apparatus GG and HH in that the medium for transmitting the time synchronous encryption / reproduction control compression parameter [TM'Dt] is the non-packaged communication path 34. This is the same invention as the (third embodiment).

(Ninth Embodiment) (Information processing device II used as recording side) As shown in FIG. 12, an information processing device II according to the present invention includes a public level data string [POVD], an encryption / reproduction control compression It has a configuration suitable for multiplexing with the parameter [Dt] and transmitting it over a communication path, and the recording device 13 in the configuration of the information processing device AA (shown in FIG. 1) is replaced with a communication device (transmission device). )
This is the same configuration as that replaced with 37. That is, the information processing apparatus II of the present invention includes a data separation circuit 2, a parameter conversion circuit 4, a data reorganization circuit 5, a multiplex (M
UX) circuit 12, adder circuit 15, destination / grade-specific parameter generation circuit 9, encryption circuit 11, and communication device (transmission device) 37. 38 is a transmission terminal, and 39 is a communication path. The same components as those described above are denoted by the same reference numerals, and description thereof will be omitted.

The information processing apparatus II having the above-described configuration is almost the same as the signal processing of the information processing apparatus AA (shown in FIG. 1) EE, except that the public level data string [POV
D] and the encryption / reproduction control compression parameter [Dt] are multiplexed and transmitted by the communication device (transmitting device) 37, thereby performing signal processing for increasing the confidentiality of the encryption / reproduction control compression parameter [Dt].

The public level data string [POVD] is output from the data rearrangement circuit 5 to the multiplex circuit 12,
The encryption / reproduction control compression parameter [Dt] is output from the encryption circuit 11 to the multiplex circuit 12. The multiplex circuit 12 outputs a public level data string [POVD].
And the encrypted reproduction control compression parameter [Dt] are multiplexed to form a single recorded data string [POVDL'P1'P2'P3'P
4 ′] and output the composition to the communication device (transmitting device) 37.
Thus, this recording data string is transmitted to the transmission terminal 38 and the communication path 3.
4.

(Tenth Embodiment) (Configuration of Information Processing Apparatus JJ Used as Reproducing Side) Information of the present invention having a configuration complementary to the information processing apparatus II used as the recording side (transmitting side) described above. As shown in FIG. 13, the processing device JJ includes a public level data string [POVD] and an encryption / reproduction control compression parameter [Dt].
], And reproduces a data string transmitted through a communication channel by multiplexing the above. The communication is performed instead of the reproducing device 15A constituting the information processing device BB (shown in FIG. 2) described above. The configuration is the same as that in which a device (reception device) 40 is newly added and the input side of the data separation circuit 16 is connected to the output side of the communication device 40.

That is, the information processing device JJ of the present invention comprises a communication device 40, a data separation circuit 16, a decoding circuit 18, a parameter reproduction circuit 21, and a multiplex (MUX) circuit 2.
2, a decoding device 23 and a communication device 36.
34 is a communication path. The same components as those described above are denoted by the same reference numerals, and description thereof will be omitted.

The information processing apparatus JJ having the above configuration is almost the same as the signal processing of the information processing apparatus BB (shown in FIG. 2), but the communication apparatus 40 is supplied from the communication path 34 via the reception terminal 39. Recorded data string [POVD
A function of demodulating L'P1'P2'P3'P4 '] is provided to reproduce the encryption reproduction control compression parameter [Dt] together with the public level data string [POVD].

As described above, the above-mentioned information processing apparatuses II and JJ of the present invention provide the encryption / reproduction control compression parameter [Dt
] Is a non-packaged communication path 3
The invention is the same as (the first embodiment) except that the number is 4.

[0124]

As described above, the information processing of the present invention has the following effects. The creator can set information of a free disclosure (protect) level that cannot be obtained by the conventional alternative scrambling, and the information of the set disclosure level can be set even in a device without the signal processing device of the present invention. Can be restored. In addition, since an unspecified number of listeners can view the information at the public level, the information in the limited range of the public level can provide a good willingness to purchase and subscribe without the conventional alternative scrambling method. Have. In addition, since the original parameters are also recorded and transmitted, there is no need to supply new media or other information to the authorized user as in the conventional demo version when becoming an authorized user. The demo version can be used as it is by supplying the key information only. The effect of encryption enables reliable copyright protection and unauthorized use prevention by encrypting the original compression parameters, and the effective distribution of decryption key information makes it easy to build an effective charging system. . As described above, the public data, which is information of the public level, is compatible with bitstream data that is not protected by ordinary compression,
Even a device without the signal processing device of the present invention can be restored.
Furthermore, unlike conventional encryption, which does not consider the compression method and ignores encryption and scramble, it is made based on the rules of compressed data configuration when decompressing. It is not impossible.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a first embodiment of an information processing apparatus of the present invention for recording information in the same recording area on the same storage medium.

FIG. 2 is a configuration diagram of a second embodiment of the information processing apparatus of the present invention for reproducing information recorded in the same recording area on the same storage medium.

FIG. 3 is a diagram showing the structure of compressed data according to the MPEG1 system.

FIG. 4 is a diagram illustrating an operation of the information processing apparatus according to the present invention based on reproduction control information.

FIG. 5 is a diagram showing information on which signal processing has been performed on the same storage medium.
FIG. 11 is a configuration diagram of a third embodiment of the information processing apparatus of the present invention that records data in two different data areas.

FIG. 6 is a block diagram of a fourth embodiment of the information processing apparatus according to the present invention for reproducing information recorded in two different data areas on the same storage medium and subjected to signal processing;

FIG. 7 is a configuration diagram of a fifth embodiment of the information processing apparatus of the present invention that records information subjected to signal processing in two types of storage media.

FIG. 8 is a configuration diagram of a sixth embodiment of the information processing apparatus of the present invention for reproducing information recorded on two types of storage media and subjected to signal processing.

FIG. 9 is a diagram showing time synchronization information included in input data according to the MPEG1 system.

FIG. 10 is a configuration diagram of an information processing apparatus according to a seventh embodiment of the present invention that records information subjected to signal processing on a storage medium and transmits the information through a non-package communication path.

FIG. 11 is a configuration diagram of an information processing apparatus according to an eighth embodiment of the present invention for reproducing information recorded on a storage medium and subjected to signal processing, and receiving the signal-processed information through a non-package communication path.

FIG. 12 is a configuration diagram of a ninth embodiment of the information processing apparatus of the present invention for transmitting information subjected to signal processing through a non-package communication path.

FIG. 13 is a block diagram of a tenth embodiment of the information processing apparatus of the present invention which receives signal-processed information through a non-package communication path.

[Explanation of symbols]

 2, 16 Data separation circuit 4 Parameter conversion circuit 5 Data reorganization circuit 9 Destination / grade-specific parameter generation circuit 11 Encryption circuit 13, 25, 26, 28, 29 Recording device 14, 14A, 14B, 14B, 30 Recording medium 15 Adder circuit 15A, 27, 31 Reproducing device 18 Decoding circuit 21 Parameter reproducing circuit 22 Multiplex circuit (data rearrangement circuit) 23 Decoding device 32, 37 Transmitting device 34 Communication path 36, 40 Receiving device AA-JJ Information processing device

──────────────────────────────────────────────────の Continuing on the front page (51) Int.Cl. ⁷ identification symbol FI H04N 7/167 H04N 7/167 Z (58) Investigated field (Int.Cl. ⁷ , DB name) H04N 5/91-5 / 956 G11B 20/10-20/12 H04N 7/16-7/173

Claims (10)

(57) [Claims] 1. An information processing apparatus for encoding video and / or audio data with high efficiency, processing a data sequence including a compression parameter and compressed data by a recording signal processing and recording the data sequence on a recording medium, comprising: A data separation circuit for separating and outputting a compression parameter and compressed data; and outputting a public level compression parameter obtained by performing parameter conversion of the compression parameter with public level information designating the public level when decoding the compressed data. A data conversion circuit that outputs a public level data sequence obtained by combining the public level compression parameter and the compressed data; and a specification of whether or not to release the public data when decoding the compressed data. Protection level compression parameter obtained by adding the protection level information to be protected and the compression parameter. An encryption / playback control parameter generation circuit that outputs an encrypted playback / control compression parameter obtained by converting a parameter into a playback control / compression parameter using playback / control information and encryption information, and encrypting the public level data sequence and the encryption. And a recording device for recording a single recording data sequence obtained by combining the compressed reproduction control compression parameters on the recording medium. 2. An information processing apparatus for encoding video and / or audio data with high efficiency, processing a data sequence composed of compression parameters and compressed data by a recording signal processing and recording the data sequence on a recording medium, comprising: A data separation circuit for separating and outputting a compression parameter and compressed data; and outputting a public level compression parameter obtained by performing parameter conversion of the compression parameter with public level information designating the public level when decoding the compressed data. A data conversion circuit that outputs a public level data sequence obtained by combining the public level compression parameter and the compressed data; and a specification of whether or not to release the public data when decoding the compressed data. Protection level compression parameter obtained by adding the protection level information to be protected and the compression parameter. An encryption / playback control parameter generation circuit that outputs an encrypted playback / control compression parameter obtained by converting a parameter into a playback / control compression parameter by using playback / control information and encryption information, and recording the public level data string. A first recording device for recording in a first recording area of a medium, the first recording device storing the encrypted reproduction control compression parameter in another recording area of the recording medium different from the first recording area; An information processing apparatus comprising: a second recording device that performs recording in synchronization with a recording operation of a medium. 3. An information processing apparatus for encoding video and / or audio data with high efficiency, processing a data sequence composed of a time synchronization compression parameter and compressed data by a recording signal processing, and recording the data sequence on a recording medium. A data separation circuit that separates and outputs a time synchronization compression parameter and compressed data from a column; and, when decoding the compressed data, obtains the time synchronization compression parameter by parameter conversion with public level information designating its public level. A parameter conversion circuit that outputs a time synchronization release level compression parameter; a data reorganization circuit that outputs a time synchronization release level data sequence obtained by combining the time synchronization release level compression parameter and the compressed data; At the time of decryption, protect level information that specifies whether or not the The time synchronization protection level compression parameter obtained by adding the inter-synchronization compression parameter is converted into the reproduction control compression parameter by the reproduction control information and the encryption information, and then the time synchronization encryption reproduction control compression parameter obtained by encryption is output. An encryption / reproduction control parameter generation circuit; a first recording device for recording the time synchronization release level data sequence on a first recording medium; and a time synchronization / encryption reproduction control compression parameter for the first recording medium. An information processing apparatus, comprising: a second recording device that records on a second recording medium in synchronization with a recording operation. 4. An information processing apparatus for encoding video and / or audio data with high efficiency, processing a data string composed of a time synchronization compression parameter and compressed data, and transmitting it to a recording medium or a communication path. A data separation circuit that separates and outputs a time-synchronous compression parameter and compressed data from the data sequence; and, when decoding the compressed data, converts the time-synchronous compression parameter with public level information that specifies the public level. A parameter conversion circuit that outputs a time synchronization release level compression parameter obtained by the above, a data reorganization circuit that outputs a time synchronization release level data sequence obtained by combining the time synchronization release level compression parameter and the compressed data, Protect level for specifying whether to release compressed data when decrypting it The time synchronization protection level compression parameter obtained by converting the time synchronization protection level compression parameter obtained by adding the information and the time synchronization compression parameter into the reproduction control compression parameter by the reproduction control information and the encryption information and then encrypting the same. An encryption / reproduction control parameter generation circuit that outputs the time synchronization release level data sequence on the recording medium; and a transmission device that sends the time synchronization encryption / reproduction control compression parameter to the communication path. An information processing apparatus comprising: 5. An information processing apparatus which encodes image and / or audio data with high efficiency, processes a data string composed of compression parameters and compressed data, performs recording signal processing, and sends the processed signal to a communication path. A data separation circuit for separating and outputting a compression parameter and compressed data; and outputting a public level compression parameter obtained by performing parameter conversion of the compression parameter with public level information designating the public level when decoding the compressed data. A data conversion circuit that outputs a public level data sequence obtained by combining the public level compression parameter and the compressed data; and a specification of whether or not to release the public data when decoding the compressed data. Protection level information and the protection level compression parameter obtained by adding the compression parameter. An encryption / reproduction control parameter generation circuit that outputs an encrypted reproduction / control compression parameter obtained by converting a meter into a reproduction / control compression parameter using reproduction / control information and encryption information, and encrypting the public level data sequence and the encryption; An information processing apparatus, comprising: a transmission device for transmitting a single recording data string obtained by combining the compressed reproduction control compression parameters to the communication path. 6. An information processing apparatus for reproducing a single recording data sequence recorded on a recording medium by a recording signal processing of the information processing apparatus according to claim 1 and outputting image and / or audio data. A reproducing apparatus that reproduces the recording medium and outputs a reproduced data sequence, and separates and outputs an encrypted reproduction control compression parameter from the reproduced data sequence, and separates a public level data sequence,
A data separation circuit for outputting compressed data from which the public level compression parameter has been separated and removed; and a protection level information and compression parameter obtained by decrypting the encryption / reproduction control compression parameter by decryption information and reproduction control information. A decryption / reproduction control parameter decryption circuit, and a data sequence composed of a compression parameter and compressed data obtained by combining the public level data sequence and the compression parameter with high efficiency encoding of image and / or audio data. An information processing apparatus comprising: a data rearrangement circuit that outputs the data sequence; and a decoding device that outputs image and / or audio data obtained by complementarily decoding the highly efficient encoded data sequence. 7. A public level data sequence recorded in a first recording area of a recording medium by a recording signal processing of the information processing apparatus according to claim 2, and a method of determining whether the recording medium is different from the first recording area. An information processing apparatus for outputting image and / or audio data by performing a reproduction signal process on an encrypted reproduction control compression parameter recorded in an area of, and reproducing the recording medium to obtain a public level data string and encrypted reproduction. A reproducing device for outputting a control compression parameter; a data separation circuit for outputting compressed data obtained by removing the public level compression parameter from the public level data sequence; and an encryption / reproduction control compression using decryption information and reproduction control information. A decryption / reproduction control parameter decryption circuit for outputting protect level information and the compression parameter obtained by decrypting the parameter; A data rearrangement circuit for encoding the image and / or audio data obtained by combining the data and the compression parameter with high efficiency, and outputting a data sequence composed of the compression parameter and the compressed data; An information processing apparatus comprising: a decoding device that outputs image and / or audio data obtained by complementarily decoding the data string. 8. A single recording data sequence recorded on the first and second recording media by a recording signal processing of the information processing apparatus according to claim 3 and a reproduction signal processing to output image and / or audio data. An information processing apparatus for reproducing a time-synchronous disclosure level data sequence from the first recording medium; and a second reproducing apparatus for reproducing a time-synchronous encrypted reproduction control compression parameter from the second recording medium. 2, a data separation circuit that outputs time-synchronous compressed data obtained by removing a public level compression parameter from the time-synchronous public level data sequence, and the time-synchronous encryption / reproduction by decryption information and reproduction control information. A decryption / reproduction control parameter decryption circuit that outputs the protection level information and the time synchronization compression parameter obtained by decrypting the control compression parameter; A data reorganization circuit for efficiently encoding image and / or audio data obtained by combining the inter-synchronous compressed data and the time-synchronous compression parameter and outputting a data sequence composed of the compression parameter and the compressed data; An information processing apparatus comprising: a decoding device that outputs image and / or audio data obtained by complementarily decoding the efficiency-encoded data sequence. 9. A single recording data sequence recorded on a recording medium by a recording signal processing of the information processing apparatus according to claim 4 and sent to a communication path, and a reproduction signal processing is performed to convert image and / or audio data. An information processing device for outputting, a reproducing device for reproducing a time-synchronous public level data sequence from the recording medium; a receiving device for receiving and reproducing a time-synchronous encrypted reproduction control compression parameter from a communication path; A data separation circuit for outputting time-synchronous compressed data obtained by removing a public level compression parameter from a data sequence; and a protector obtained by decrypting the time-synchronous encryption / reproduction control compression parameter using decryption information and reproduction control information. A decryption / reproduction control parameter decoding circuit for outputting level information and the time synchronization compression parameter; And a data rearrangement circuit for efficiently encoding image and / or audio data obtained by combining the time-synchronous compression parameters and outputting a data sequence composed of the compression parameters and the compressed data; An information processing apparatus comprising: a decoding device that outputs image and / or audio data obtained by complementarily decoding the data string. 10. An information processing apparatus for receiving a single recording data sequence sent to a communication path by a recording signal processing of the information processing apparatus according to claim 5 and outputting image and / or audio data. A receiving device that receives and reproduces a reproduced data sequence from the communication path, and separates and outputs an encrypted reproduction control compression parameter from the reproduced data sequence, and separates a public level data sequence,
A data separation circuit for outputting compressed data from which the public level compression parameter has been separated and removed; and a protection level information and compression parameter obtained by decrypting the encryption / reproduction control compression parameter by decryption information and reproduction control information. A decryption / reproduction control parameter decryption circuit, and a data sequence composed of a compression parameter and compressed data obtained by combining the public level data sequence and the compression parameter with high efficiency encoding of image and / or audio data. An information processing apparatus comprising: a data rearrangement circuit that outputs the data sequence; and a decoding device that outputs image and / or audio data obtained by complementarily decoding the highly efficient encoded data sequence.