JP2002084318A - Data processing equipment, data processing system, data processing method and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data processing system which can transmit secure multi- media data, while regulating security information and holding compatibility with a transmission partner. SOLUTION: A forming means 106 forms data for transmission from encoded data obtained, by first encoding means 101, 103, 105 and a second encoding means 102. A dividing means 107 divides the data for transmission, obtained by the forming means 106 into data for transmission of security information and data for transmission of object data. A first transmitting means 110 transmits data for transmission of the object data, obtained by the dividing means 107 with a session which is not secure. A second transmitting means 109 transmits data for transmission of security information, obtained by the dividing means 107 having a secure session.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing apparatus, a data processing system, a data processing method, and the like, which are used in, for example, an apparatus or a system for transmitting copyright protected multimedia data. The present invention relates to a storage medium storing computer-readable processing steps for executing the same.

[0002]

2. Description of the Related Art In recent years, for example, "ISO / IE"
In the C14496 (MPEG phase 4) standard,
The standardization of multimedia coding (standardization of compression format) is underway.

In this standard, in addition to the conventional encoding of video data and audio data, it is possible to define the spatial and temporal arrangement of each medium, and this is called a "scene description". The media is called an “object”.

FIG. 4 shows an example of a scene according to this standard. In FIG. 4, a BOX (box) 401 and a Cylinder (cylinder) 402 are defined as graphic objects. In addition, an image texture 401 a to be attached to the BOX 401,
A video texture 402a to be attached to r402 and an audio 403 to be reproduced at the same time are defined.

As a method of the scene description itself, for example,
VRML (Virtual Reality Marku)
BIFS (Binary Format for) that has been extended and binarized based on p Language
Scene description) is employed.

In addition, in this standard, apart from the scene description as shown in FIG. 4, data indicating an attribute of each object, which is called an object descriptor (hereinafter referred to as "OD"), is defined. The attributes here are
Media attributes (video, audio, image, etc.)
And copyright holder information, QoS (Quality Of Se)
service) information, content rating information, and the like. Such attributes themselves are included in the OD as individual descriptors.

FIG. 5 shows an example of an entire bit stream according to this standard. In FIG. 5 above,
“501” is an initial object descriptor, and stores properties of the entire bit stream (such as a profile of the bit stream). “502”
This is a BIFS stream in which scene information is stored.

[0008] "503" and "506" are OD,
In the bit stream shown in FIG. 5, two OD1 (5
03) and OD2 (506). O
After D503 and 506, the attribute of the object is described. That is, OD1 (503), OD2 (50
Subsequent to 6), a plurality of elementary stream descriptors (hereinafter, referred to as “ESD”) indicating the attributes of each media stream (hereinafter, also referred to as “elementary stream”) ES1 and ES2 can be described.
In FIG. 5 above, after OD1 (503), ESD1 (50)
4) is described, and ESD2 (5) is added after OD2 (506).
07) is described.

Further, the elementary streams ES1, ES1,
Regarding ES2, it is actually packetized and “Sy
nc Layer Packet ”(hereinafter, referred to as“ SL packet ”), as shown in FIG. 5, the SlCo for describing the structure of the SL packet.
nfig descriptors 505 and 508 are ESD1
(504) and ESD2 (507).

The above-described OD and ESD descriptors need to be set at the head of each of the elementary streams ES1 and ES2 in the bit stream shown in FIG. However, OD and ESD can be added, deleted, and changed by inserting an update command in the middle of the bit stream.

Also, in this standard, for each OD and ES,
Security information such as copyright management information and access control information can be added. This information is
PMP (Intellectual Property)
Management and Protection)
Called information. For IPMP information, IPM
The details are described in a descriptor called a P descriptor. In practice, encryption is often used as access control, but the IPMP method (descriptor syntax) is not specified, and the syntax is free. RA (Regist)
IPM registered in (Ration Authority)
Only the security type number of P is described.

The IPMP information itself described by the IPMP descriptor can be added as an IPMP elementary stream ES (hereinafter, referred to as “IPMP-ES”). FIG. 6 shows an example of the entire bit stream in this case. In FIG. 6, IPMP1 (509) and IPMP2 (5
11) are respectively elementary streams ES1
(510), IPMP-ES for ES2 (512)
It has become.

FIG. 7 shows an example of the IPMP descriptor. In FIG. 7, "601" is
This is a descriptor tag (TAG), and indicates the type of the descriptor. “602” is the length field (L
ENGTH) and indicates the length (number of bytes) of the entire descriptor. “603” is a descriptor ID, and stores the identifier of the descriptor itself. “60
4 ″ is the security type number (IPMP
S_type). “605” is an option field (Option) in which data accompanying IPMP can be appropriately inserted.
The syntax in the option field 605 is free. Further, the accompanying data can be indicated by a URL in the option field 605.

The above-described IPMP descriptor also needs to be placed at the head before each of the elementary streams ES1 and ES2 in the bit stream shown in FIG. However, IPMP descriptors can be added, deleted, and changed by inserting an update command in the middle of a bit stream. FIG. 6 shows an example of a bit stream including one command 513 for updating IPMP information.

FIG. 8 shows an example of an encoder 700 for generating a bit stream as described above. In FIG. 8, "701" is an object descriptor generator, which appropriately generates the above-described descriptor according to the properties of the bit stream. “702” is a media encoder,
Encode data such as video and audio
I do. “703” is an IPMP controller.
“704” is a BIFS encoder, which binarizes the scene information. “705” is an update controller provided as needed, and includes OD, ESD,
And a command for updating properties such as an IPMP descriptor. “706” is a multiplexer that multiplexes each descriptor and media stream as one SL packet.

FIG. 9 shows an example of a decoder 800 for decoding (reproducing) the bit stream obtained by the encoder 700 shown in FIG. In FIG. 9, “801” is a demultiplexer that separates each descriptor, ES, and the like from an input bit stream. “803” is a descriptor parser, which determines the type of the descriptor based on the tag information of the descriptor, decodes the content of the descriptor, and sets it in each unit as appropriate. “804” is a BIFS decoder, which decodes a binary BIFS,
Reconstruct the scene structure. “805” is a media decoder that decodes a media decoder for video, audio, or image. “807” is a renderer, which appropriately displays and reproduces each object according to the scene structure. “806” is an IPMP controller, which includes an IPMP descriptor and an IPMP_ES
Media reproduction control (reproduction restriction, effect control, etc.) is performed in accordance with this information. For example, if the data is encrypted, the data is transferred to the media decoder 805 after the encryption is decrypted. “802” is a synchronization controller that controls synchronization between media.

The method of transferring data from the encoder 700 in FIG. 8 to the decoder 800 in FIG. 9 is not specifically described. However, in the case of transmission over a network, all data are transmitted as one bit stream in the same session. It is generally transmitted and received at.

[0018]

However, in a conventional data processing apparatus for transmitting multimedia data by a bit stream as shown in FIGS. 5 and 6, the IPMP descriptor (security information) shown in FIG. 7 is used. However, there is a problem that compatibility with a transmission partner cannot be obtained due to free syntax. Also, IPM
If the syntax of the P descriptor (security information) is clearly standardized, a security method is disclosed, and there is a problem that the security level is lowered.

Therefore, the present invention has been made to eliminate the above-mentioned disadvantages, and enables secure multimedia data transmission while defining compatibility of security information and maintaining compatibility with a transmission partner. It is an object of the present invention to provide a storage medium in which a data processing device, a data processing system, a data processing method, and processing steps for executing the same are stored in a computer-readable manner.

[0020]

For such a purpose,
A first invention is a data processing device that encodes and transmits data including security information in accordance with a predetermined encoding standard, wherein the first encoding unit encodes the target data, and the security information of the target data is encoded. Second encoding means for encoding; generating means for generating data for transmission from the encoded data obtained by the first encoding means and the second encoding means; Dividing means for dividing the transmitted data into security data transmission data and target data transmission data, and transmitting the target data transmission data obtained by the division means in a first session. It is characterized by comprising a first transmission means and a second transmission means for transmitting the security information transmission data obtained by the division means in a second session.

According to a second aspect of the present invention, there is provided a data processing apparatus for encoding and transmitting data including security information in accordance with a predetermined encoding standard, comprising: first encoding means for encoding target data; A second encoding unit that encodes the security information, a first transmission unit that transmits the transmission data of the encoded data obtained by the first encoding unit in a first session, and a second transmission unit that transmits the encoded data. And a second transmission unit for transmitting the transmission data of the encoded data obtained by the encoding unit in the second session.

In a third aspect based on the first or second aspect, the first encoding means includes a security adding means for securing the target data. In a fourth aspect based on any one of the first to third aspects, the first session includes a non-secure session, and the second session includes a secure session.

In a fifth aspect based on any one of the first to fourth aspects, the target data and the security information are restored from the data transmitted by the first transmission means and the second transmission means. The decoding means is provided.

In a sixth aspect based on any one of the first to fifth aspects, the predetermined encoding standard is an MPEG-4 encoding standard.

According to a seventh aspect, in the sixth aspect,
The security information is IPMP data.

According to an eighth aspect of the present invention, there is provided the above-described arbitrary coded data and the security of the data, wherein the arbitrary data encoded according to a predetermined encoding standard and the security information of the data are transmitted in different sessions. The data processing device receives and decodes information.

A ninth invention is a data processing system in which a plurality of devices are communicably connected to each other, wherein at least one device among the plurality of devices includes the first to the first devices.
8. It has a function of the data processing device according to any one of 8.

According to a tenth aspect, there is provided a data processing system for transmitting multimedia data according to a predetermined encoding standard, wherein at least one of the media processing units encodes media data including at least one of image, video, and audio data. One or more first encoding means, a second encoding means for encoding scene information constituted by the media data, and a third encoding means for encoding attribute information of the media data. A fourth encoding unit for encoding the security information of the media data, and multiplexing all the encoded data obtained by the first to fourth encoding units to form one bit stream. The first forming means and the bit stream obtained by the above forming means are encoded with the encoded data of the security information obtained by the fourth encoding means. Data, the dividing means for dividing the encoded data obtained by the first to third encoding means into two, and the two encoded data obtained by the dividing means are again re-formed as one bit stream. Second forming means for constructing, link information updating means for updating link information between the two coded data obtained by the dividing means, and two bit streams obtained by the second forming means, 1
Transmission means for transmitting in different sessions of the first session and the second session; session control means for setting up two sessions of a secure session and an insecure session with respect to the transmission means; A third forming unit for demultiplexing the encoded data obtained by the first to third encoding units from the bit stream transmitted in the first session, and a third unit transmitted in the second session by the transmission unit. Forming means for demultiplexing encoded data of security information obtained by the fourth encoding means from the bit stream obtained, and encoded data of media data obtained by the third forming means And a coded data of the scene information obtained by the third forming means. A second decoding means for decoding the image data and reconstructing the scene, a third decoding means for decoding the encoded data of the attribute information of the media data obtained by the third forming means, and a fourth forming means Fourth decoding means for decoding the encoded data of the security information obtained by the means, reproduction means for reproducing the data obtained by the first to third decoding means, and decoding means obtained by the fourth decoding means. Reproduction control means for controlling reproduction by the reproduction means based on the security information provided.

In an eleventh aspect based on the tenth aspect, the first encoding means includes a security adding means for securing the media data. In a twelfth aspect based on the tenth or eleventh aspect, the predetermined coding standard is an MPEG-4 coding standard.

In a thirteenth aspect based on the twelfth aspect, the security information is IPMP data.

A fourteenth invention is a data processing method for encoding and transmitting data including security information in accordance with a predetermined encoding standard. The data processing method comprises the steps of: A generating step of generating data for transmission from the encoded data; and a dividing step of dividing the transmission data obtained in the generating step into transmission data of the security information and transmission data of the target data. And transmitting the two transmission data obtained in the dividing step in different sessions.

In a fifteenth aspect based on the fourteenth aspect, the generating step includes a security adding step for applying security to the target data.

[0033] A sixteenth invention is a data processing method for encoding and transmitting data including security information in accordance with a predetermined encoding standard, wherein the data obtained by encoding the target data and the security information of the target data are transmitted. And transmitting the encoded data in different sessions.

In a seventeenth aspect based on any one of the fourteenth to sixteenth aspects, the predetermined coding standard is MPEG.
-4 coding standard.

According to an eighteenth aspect based on the seventeenth aspect, the security information is IPMP data.

A nineteenth invention according to any one of the fourteenth to eighteenth inventions, further comprising a restoration step of restoring the target data and the security information from each data transmitted in a different session by the transmission step. It is characterized by.

In a twentieth aspect based on any one of the fourteenth to nineteenth aspects, the transmitting step includes transmitting the data for transmission of the target data in an insecure session, and transmitting the data for transmission of the security information. Transmitting in a secure session.

According to a twenty-first aspect, a function of the data processing apparatus according to any one of the first to eighth aspects, or the function of the ninth to first aspects is described.
A computer-readable storage medium storing a processing program for implementing the functions of the data processing system according to any one of the third inventions.

According to a twenty-second aspect of the present invention, a computer-readable storage medium stores the processing steps of the data processing method according to any one of the fourteenth to twentieth aspects.

[0040]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) The present invention provides, for example,
It is applied to a data transmission system 100 as shown in FIG. The data transmission system 100 of the present embodiment
SO / IEC 14496 (MPEG phase 4) "
The encoder 100a and the decoder 100b conform to the standard and have the configuration as shown in FIG.

The encoder 100a includes an OD generator 10
1. It includes an IPMP descriptor generation unit 102, a BIFS encoder 103, an IPMP control unit 104, a media encoder 105, a multiplexer 106, a selector (demultiplexer) 107, a multiplexer 108, a session manager 120a, a URL converter 121, and a multiplexer 122.

The decoder 100b includes the demultiplexer 1
11, 112, OD parser 113, IPMP descriptor parser (decoder) 114, BIFS decoder 11
5, IPMP control unit 116, media decoder 117,
It includes a synchronization control unit 118, a session manager 120b, and a renderer 119.

[0044] Encoder 100a and decoder 100b
Is a secure session that can be shared and accessed (hereinafter referred to as “secure session”) 109
And a non-secure session (hereinafter referred to as “non-secure session”) 110.

First, in the encoder 100a, the media encoder 105 encodes (compresses) media data such as images, videos, audios, and other multimedia, and outputs the encoded data. The OD generation unit 101 encodes attribute information of media data to be processed by the media encoder 105, and outputs the encoded data as an OD. The BIFS encoder 103 encodes and outputs information of a scene (see FIG. 4 described above) composed of media data to be processed by the media encoder 105.

The IPMP descriptor generation unit 102
The media data to be processed by the media encoder 105 and the security information such as the copyright information and the reproduction condition of the scene information to be processed by the BIFS encoder 103 are encoded, and
It is output as a descriptor related to MP (IPMP descriptor) or IPMP_ES. IPMP
The control unit 104 controls the IPMP descriptor generation unit 102
And manages the security information based on the security information. For example, the encoded data of the media data output from the media encoder 105 is appropriately encrypted, or key data required for the encryption is generated and output. Note that the process of the IPMP control unit 104 is not limited to the above-described encryption process, and a method of embedding security information in media data before encoding may be considered.

The multiplexer 106 is provided for the OD generator 10.
1. Each output of the IPMP descriptor generation unit 102, BIFS encoder 103, IPMP control unit 104, and media encoder 105 is multiplexed and collected into one bit stream as shown in FIG. 5 and FIG. Output. At this time, the multiplexer 106
Also controls the synchronization of multiplexed data. Specifically, for example, a time stamp or a clock reference is embedded in a packet of a bit stream.

By the operation of the encoder 100a as described above, the SL packetized bit stream is completed. The bit stream completed here is
For example, when transmitting via a network, the encoder 100a further operates as follows.

The selector (demultiplexer) 107 is
The bit stream output from the multiplexer 106 is, for example, an IPMP descriptor or an IPMP_ES
And other bitstreams (security bitstreams) and other bitstreams (bitstreams such as video and audio, etc.
(Referred to as "multimedia stream").

The URL converter 121 executes processing for coping with the fact that the link relationship between the security bit stream and the multimedia stream becomes different because the selector (demultiplexer) 107 subdivides the bit stream. Specifically, at the time of one bit stream, the security bit stream and the multimedia stream are the IPMP ES_
Although linked by ID, these two streams are separate. For this reason, the URL converter 121
In the security bit stream, the part of the type number is replaced with a URL string. In addition, URL
The notation of the session itself is separately standardized, but this is not directly related to the features of the present embodiment, so details are omitted, but the ID of the corresponding session
It is possible to define by, for example.

The multiplexer 108 re-packets the security bit stream, if necessary, according to the URL string conversion information from the URL converter 121. The multiplexer 122 performs packetization again on the multimedia stream obtained by the selector 107 as necessary.

The secure session 109 transmits the security bit stream from the multiplexer 108. The non-secure session 110 transmits the multimedia bit stream from the multiplexer 122. The session manager 120a determines in advance the secure session 109 and the non-secure session 110
Set up an optimal session for.

In one decoder 100b, the session manager 120b sets up an optimal session for the secure session 109 and the non-secure session 110 in advance. The demultiplexer 111 separates the IPMP descriptor and the IPMP_ES from the security bit stream transmitted from the secure session 109 of the encoder 100a. The demultiplexer 112
OD, BIF from the multimedia bit stream transmitted from the non-secure session 110
Separate S, A / V (audio / video) bit streams.

The OD parser 113 includes the demultiplexer 1
The OD information is extracted from the bit stream of the OD obtained in step 12, and the necessary information is set in the decoder 100b. The media decoder 117 includes the demultiplexer 11
2. Decode the A / V bit stream (media stream such as image, video, audio, etc.) obtained in step 2. At this time, the synchronization control unit 118 manages synchronization between various media processed by the media decoder 117. B
The IFS decoder 115 decodes the BIFS bit stream obtained by the demultiplexer 112,
A scene is reconstructed from various media data obtained by the media decoder 117 based on the information of the IFS. The renderer 119 appropriately displays and reproduces each object according to the scene structure obtained by the BIFS decoder 115.

The IPMP descriptor parser 114
It has a copyright management function, and controls the media decoder 117 and the renderer 119 based on the IPMP descriptor and the IPMP_ES (copyright management information and the like) obtained by the demultiplexer 111 (reproduction control of media, effect control, etc.). For example, when the data is encrypted, the data is transferred to the media decoder 117 after the encryption is decrypted, or the copyright management information is embedded in the media data before encoding. In that case, it is extracted and used for playback control.

As described above, in the present embodiment, the encoder 100a re-extracts the security information such as the IPMP descriptor and the IPMP_ES (copyright management information, etc.) from the bit stream once formed, and Secure session 10
9, so that there is no danger that the security information is illegally peeped by a third party. Therefore, even if the syntax of the IPMP descriptor and the IPMP_ES is defined, it is possible to maintain compatibility with the transmission partner without lowering the security level.

(Second Embodiment) The present invention provides, for example,
It is applied to a data transmission system 200 as shown in FIG. The data transmission system 200 of the present embodiment differs from the data transmission system 100 of FIG. 1 in the following configuration. In the data transmission system 200 of FIG. 2, the data transmission system 1 of FIG.
The components having the same functions as those of 00 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the encoder 200a according to the present embodiment, the IMP obtained by the IPMP descriptor generator 102 by two multiplexers 106a and 106b.
PMP descriptor and IPMP_ES (security information), OD generation unit 101, BIFS encoder 1
03, the data (media data) obtained by the IPMP control unit 104 and the media encoder 105 are individually multiplexed. In other words, security information is not multiplexed from the beginning, but saved as a separate file.

Therefore, in the present embodiment, FIG.
Selector 107 and multiplexer 10 as shown in FIG.
8, 122 and the URL converter 121 need not be provided, that is, there is no need to re-divide data to be secured again (security bit stream) and normal media data (multimedia bit stream). It goes without saying, however, that when a session is set up adaptively, dynamic conversion of URLs between each other is required. This allows
Even if the syntax of the IPMP descriptor and the IPMP_ES is defined, a configuration that can maintain compatibility with the transmission partner without lowering the security level can be realized with a simple configuration.

In the first and second embodiments, it is needless to say that reproduction and display should be started by the renderer 119 after synchronization is established between the sessions and the security information is transmitted. .

Further, an object of the present invention is to provide a storage medium storing program codes of software for realizing the functions of the host and the terminal of the first and second embodiments to a system or an apparatus, and to provide the system or the apparatus with the storage medium. It is needless to say that the present invention is also achieved when the computer (or CPU or MPU) of the apparatus reads out and executes the program code stored in the storage medium. In this case, the program code itself read from the storage medium implements the functions of the first and second embodiments, and the storage medium storing the program code constitutes the present invention. ROM, floppy (registered trademark) disk, hard disk, optical disk, magneto-optical disk, C
A D-ROM, a CD-R, a magnetic tape, a nonvolatile memory card, or the like can be used. The functions of the first and second embodiments are realized by executing the program code read by the computer, and the OS running on the computer based on the instruction of the program code. It goes without saying that the present invention includes a case in which the functions of the first and second embodiments are implemented by performing part or all of the actual processing. Further, after the program code read from the storage medium is written to a memory provided in an extension function board inserted into the computer or a function extension unit connected to the computer, the function extension is performed based on the instruction of the program code. C provided on board and function expansion unit
It goes without saying that a PU or the like performs part or all of the actual processing, and the processing realizes the functions of the first and second embodiments.

FIG. 3 shows an example of the configuration of the computer 300. As shown in FIG. 3, the computer 300 includes a CPU 301, a ROM 302,
RAM 303, keyboard controller (KBC) 305 of keyboard (KB) 309, and C as a display unit
CRT controller (CRTC) 306 of RT display (CRT) 310 and hard disk (HD) 31
1 and a disk controller (DKC) 307 of a floppy disk (FD) 312 and a network interface card (NIC) 308 for performing transmission via a network 320 such as the Internet so that they can communicate with each other via a system bus 304. It has a connected configuration.

The CPU 301 is provided in the ROM 302 or the HD
By executing the software stored in 311 or the software supplied from the FD 312, each component connected to the system bus 304 is generally controlled.
That is, the CPU 301 executes a predetermined processing program,
By reading and executing from the ROM 302, the HD 311, or the FD 312, control for performing the operations in the above-described first and second embodiments is performed.

The RAM 303 functions as a main memory or a work area of the CPU 301. KBC305
Controls an instruction input from the KB 309 or a pointing device (not shown). CRTC 306 is
The display of the RT 310 is controlled. The DKC 307 includes a boot program, various applications, editing files,
HD 311 and FD 31 for storing a user file, a network management program, the above processing program, and the like
2 is controlled. The NIC 308 bidirectionally exchanges data with various devices or systems on the network 320.

[0065]

As described above, according to the present invention, a predetermined coding standard ("ISO / IEC14496 (MPE
When encoding and transmitting data including security information in accordance with the “G phase 4)” standard and the like, target data (data such as video and audio) and security information of the target data (information such as copyright management information and reproduction conditions)
Are transmitted in different sessions. As a result, the security information can be transmitted in a secure session, so that there is no danger that the security information is illegally intercepted by a third party. Further, for example, “ISO / IEC 14496 (M
PEG phase 4) standard, security information (IPMP descriptor and I
Even if the syntax of (PMP_ES) is defined, it is possible to maintain compatibility with the transmission partner without lowering the security level. Therefore, according to the present invention, secure multimedia transmission can be achieved while maintaining mutual compatibility by defining security information.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a data transmission system to which the present invention is applied in a first embodiment.

FIG. 2 is a block diagram showing a configuration of a data transmission system to which the present invention is applied in a second embodiment.

FIG. 3 is a block diagram illustrating an example of a configuration of a computer that executes a processing program for implementing the functions of the data transmission system in another embodiment.

FIG. 4 shows “ISO / IEC 14496 (MPEG ph
4 is a diagram for describing an example of a scene according to the “ase4)” standard. FIG.

FIG. 5 is a diagram for explaining an example of a bit stream conforming to the above standard.

FIG. 6 shows the security information (I
FIG. 3 is a diagram for explaining PMP).

FIG. 7 is a diagram for explaining the IPMP descriptor.

FIG. 8 is a block diagram illustrating a configuration of an encoder of a conventional data transmission system.

FIG. 9 is a block diagram showing a configuration of a decoder of a conventional data transmission system.

[Explanation of symbols]

 Reference Signs List 100 data transmission system 100a encoder 100b decoder 101 object descriptor (OD) generator 102 IPMP descriptor generator 103 BIFS encoder 104 IPMP controller 105 media encoder 106 multiplexer 107 selector (demultiplexer) 108 multiplexer 109 secure session 110 unsecured session 111 Demultiplexer 112 Demultiplexer 113 Object descriptor (OD) parser 114 IPMP descriptor parser (decoder) 115 BIFS decoder 116 IPMP control unit 117 Media decoder 118 Synchronization control unit 119 Renderer 120a, 120b Session manager 121 URL converter 122 De Multiplexer

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5C059 KK43 MA00 MB29 RA06 RB02 RC32 RC35 SS06 SS20 SS26 UA02 UA05 UA24 5K030 GA15 HA08 JA05 KA01 KA19 LA07 LD19 5K034 AA05 EE11 FF01 HH01 HH12 HH16 MM25

Claims (22)

[Claims] 1. A data processing apparatus for encoding and transmitting data including security information according to a predetermined encoding standard, comprising: first encoding means for encoding target data; and encoding security information of the target data. A second encoding unit for generating data for transmission from the encoded data obtained by the first encoding unit and the second encoding unit; and a second encoding unit obtained by the generation unit. A dividing unit that divides the transmission data into the security information transmission data and the target data transmission data, and a transmission unit that transmits the target data transmission data obtained by the division unit in a first session. 1 transmission means, and second transmission means for transmitting the security information transmission data obtained by the division means in a second session. Processing equipment. 2. A data processing apparatus for encoding and transmitting data including security information according to a predetermined encoding standard, comprising: first encoding means for encoding target data; and encoding the security information of the target data. Second encoding means for converting the data for transmission of the encoded data obtained by the first encoding means in a first session, and second encoding means A second transmission unit for transmitting the transmission data of the encoded data obtained in the above in a second session. 3. The data processing apparatus according to claim 1, wherein the first encoding unit includes a security adding unit that secures the target data. 4. The data processing according to claim 1, wherein the first session includes a non-secure session, and the second session includes a secure session. apparatus. 5. The apparatus according to claim 1, further comprising decoding means for restoring target data and said security information from data transmitted by said first transmission means and said second transmission means. The data processing device according to claim 1. 6. The predetermined coding standard is MPEG-4.
The data processing apparatus according to claim 1, wherein the data processing apparatus is an encoding standard. 7. The data processing device according to claim 6, wherein the security information is IPMP data. 8. An arbitrary data encoded in accordance with a predetermined encoding standard and security information of the data are received by receiving the encoded arbitrary data and the security information of the data transmitted in different sessions. A data processing device for decrypting the data. 9. A data processing system in which a plurality of devices are communicably connected to each other, wherein at least one device among the plurality of devices is the data processing device according to any one of claims 1 to 8. A data processing system having a function of a processing device. 10. A data processing system for transmitting multimedia data according to a predetermined encoding standard, wherein at least one of the first and second media data encoding media data including at least one of image, video, and audio data is encoded. 1 encoding means; second encoding means for encoding information of a scene constituted by the media data; third encoding means for encoding attribute information of the media data; Fourth encoding means for encoding security information, and first forming means for multiplexing all code data obtained by the first to fourth encoding means to form one bit stream The bit stream obtained by the forming means is converted to the fourth
A dividing unit for dividing the encoded data of the security information obtained by the encoding unit into the encoded data obtained by the first to third encoding units; A second forming unit for reconstructing each of the two encoded data as one bit stream again; a link information updating unit for updating link information between the two encoded data obtained by the dividing unit; Transmitting means for transmitting the two bit streams obtained by the forming means in different sessions of a first session and a second session; and two sessions of a secure session and an insecure session for the transmitting means. A session control means for setting up the above, from the bit stream transmitted in the first session by the transmission means, A third forming unit for demultiplexing the coded data obtained by the first to third coding units; and a fourth coding unit based on the bit stream transmitted in the second session by the transmission unit. A fourth forming unit for demultiplexing the encoded data of the security information obtained in the above, a first decoding unit for decoding the encoded data of the media data obtained in the third forming unit, A second decoding unit that decodes the coded data of the scene information obtained by the third forming unit to reconstruct the scene; and a coded data of the attribute information of the media data obtained by the third forming unit. Third decoding means for decoding; fourth decoding means for decoding the encoded data of the security information obtained by the fourth forming means; and data obtained by the first to third decoding means. Reproduce A data processing system comprising: a playback unit; and a playback control unit that controls playback by the playback unit based on security information obtained by the fourth decryption unit. 11. The data processing system according to claim 10, wherein the first encoding unit includes a security adding unit that secures the media data. 12. The above-mentioned predetermined coding standard is MPEG-
11. The encoding system according to claim 10, wherein the encoding standard is four encoding standards.
2. The data processing system according to 1. 13. The data processing system according to claim 12, wherein said security information is IPMP data. 14. A data processing method for encoding and transmitting data including security information in accordance with a predetermined encoding standard, comprising: data obtained by encoding target data; and data obtained by encoding security information of the target data. A generating step of generating data for transmission from the above; a dividing step of dividing the transmission data obtained in the generating step into a transmission data of the security information and a transmission data of the target data; Transmitting the two transmission data obtained in the steps in different sessions, respectively. 15. The data processing method according to claim 14, wherein the generating step includes a security adding step of applying security to the target data. 16. A data processing method for encoding and transmitting data including security information according to a predetermined encoding standard, comprising: data obtained by encoding target data; and data obtained by encoding security information of the target data. And a transmitting step of transmitting the data in different sessions. 17. The method according to claim 1, wherein the predetermined coding standard is MPEG-
17. The encoding standard according to claim 14, wherein:
The data processing method according to any one of the above. 18. The data processing method according to claim 17, wherein said security information is IPMP data. 19. The method according to claim 14, further comprising a restoring step of restoring the target data and the security information from each data transmitted in a different session by the transmitting step. Data processing method. 20. The transmission method as claimed in claim 20, wherein the transmitting step includes transmitting the transmission data of the target data in an insecure session, and transmitting the transmission data of the security information in a secure session. Item 20. The data processing method according to any one of items 14 to 19. 21. A processing program for implementing the function of the data processing device according to any one of claims 1 to 8, or the function of the data processing system according to any one of claims 9 to 13. Readable by a computer. 22. A storage medium, wherein the processing steps of the data processing method according to claim 14 are readable by a computer.