JP2002101086A - Reception method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform various control to contents with meta data described about detail information related with the contents, and to protect the rights of the contents and of the rights of a user as an individual. SOLUTION: Meta data are attached to respective contents, and a method for presenting contents to a viewer, usage condition, the storage of the contents in enciphered state, limited reception to a terminal; limited reception to an individual or the like can be defined at a broadcasting side, and viewing control of the viewer, storage control, copy control; enciphering/decoding control or the like are conducted based on that definition; and detailed control with respect to the contents and the control of a method for presenting the contents to the user and the use condition or the like is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a receiving method,
In particular, by defining metadata that describes detailed information about content, it is possible to provide a service capable of protecting content rights, personal rights protection of a user, and the like by performing various controls on content with the metadata. Reception method.

[0002]

2. Description of the Related Art SI (service information) is defined as information about contents in BS digital broadcasting which has been widely used in recent years. This service information is content-related information, but is specialized for an EPG (electronic program guide) and is not content-related information corresponding to various contents. For this reason, a means capable of defining detailed information on various contents is not currently defined in the broadcasting standard, and it is difficult to provide detailed services based on control for each content.

[0003]

Since only EPG (Electronic Program Guide) exists in the current satellite digital broadcasting standard as a means for defining information related to contents, more detailed information than information for each program is provided. Can not be defined. For this reason, it is difficult to perform a content control service using control for each content and detailed information on the content.

In order to provide a data distribution service, contents are directly distributed to a home or the like, and the data is stored / copied / reproduced in a digital form in the home or the like. Issues related to copyrights and other rights, such as copying and reproduction, that exceed the intended use arise. Therefore, it is necessary to protect and manage the rights of copyright holders, broadcasters, and viewers of the content.

[0005] Conventional digital broadcasts are mainly viewed in real time, so that content encryption on a transmission path by conditional access, which limits terminals capable of receiving broadcasts,
This is content protection at the level of copy control for external devices.Since the key related to encryption on the transmission path is switched in a fixed time, if the encrypted content on the transmission path is stored, all keys, PSI / SI, etc. It is necessary to accumulate tables, which causes duplication of tables, security issues for contents, and the like.

In view of the above, the present invention defines various types of metadata describing detailed information on contents, performs various controls on the contents using the metadata, and protects the rights of the contents and the rights of the user. The purpose is to provide services that are possible. It is another object of the present invention to provide a content control service using control for each content and detailed information on the content. Another object of the present invention is to protect and manage the rights of copyright holders, broadcasters, and viewers of content.

[0007]

According to the solution of the present invention, when a request for receiving the encrypted content constituting the event distributed from the center is made, the metadata including the content information and the control information relating to the content is obtained. Receiving the storage metadata including the work key (Kw1) assigned to each business operator and partially encrypted with the content key (Kk) used when encrypting the content in content units; Compare the unencrypted contract code included in the storage metadata with the terminal and personal contract code pre-stored in the receiving terminal to determine whether or not the content can be viewed and to view the content. For example, from the position of the unencrypted content key (Kk) included in the stored metadata, the content key (K
k) containing the key distribution metadata encrypted with the work key (Kw1), and receiving the unencrypted work key (Kw1) contained in the storage metadata or the key distribution metadata.
w1) The work key (Kw1) stored in advance in the receiving terminal is identified by the identification information, and the encrypted content key (Kk) in the key distribution metadata is decrypted by the work key (Kw1). The present invention also provides a receiving method for decrypting an encrypted portion of the storage metadata with the content key (Kk), acquiring the encrypted content, and viewing the encrypted content.

As another feature of the present invention, a content is created in a unit intended by a broadcaster, and content-related information (metadata) is attached to each content. The metadata attached to each content includes general information about the content, copyright protection information, control information on storage and reproduction, and the like.

[0009] Thus, fine control can be performed for each content. Other features of the present invention include a method of presenting content to a viewer on the broadcast side, usage conditions,
It is possible to define contents storage in encrypted state, limited reception for terminals, limited reception for individuals, etc., and perform viewing / listening control of viewers, storage control, copy control, encryption / decryption control, etc. based on these definitions. Provide a service that can protect rights such as rights. As a result, it is possible to provide a service capable of protecting the right of the content by controlling the method of presenting the content to the user, the usage conditions, and the like, and protecting the right of the individual user.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The description is given according to the following headings. 1. System 2. Data structure Delivery form 4. Use of metadata 5. Service form 6. 6. Billing service Conclusion

1. System (Service Overview) This comprehensive data distribution service is an information (data) distribution service that can be viewed at the desired location when you want to see the content you want to see, and is a conventional real-time type (viewing what you are broadcasting) digital Unlike broadcasting, this service provides not only real-time delivery but also storage-based information delivery. This allows near-on-demand (NV) services that allow viewers to select and view their favorite content from stored content whenever they want.
OD (Near On Demand) service is provided.

[0012] In addition, the present invention also provides content viewing / listening at a user's favorite place by directly storing or copying content in a removable medium or an external device connected to a receiving terminal receiving the service. Furthermore, in the conventional digital broadcasting service, the content usage contract form is limited to a narrow range such as a contract on a terminal basis. However, this service provides a wide range of content usage contract forms capable of contracting on an individual user basis. .

As an overview of the present comprehensive data distribution service,
The storage type television broadcast will be described. FIG. 1 is a service configuration diagram of the comprehensive data distribution service. A storage-type television broadcast is, like a conventional television broadcast, a content 1 (program) transmitted from a broadcast side (broadcasting station), an antenna 2 (distribution by cable, distribution in a package), a receiving terminal. 3 and is viewed from the moment when it is distributed by a monitor device such as a television 9. In this case, in addition to a case called a real-time type of viewing 6, the content once distributed in the same manner as a conventional video deck or the like Is stored and stored in a storage medium 4 (a large-capacity storage medium such as a hard disk) and then viewed. (A portable removable medium 5 such as a DVD-RAM may be used as a storage medium.) This is an information distribution service that enables services such as real-time type + storage type viewing 7 for viewing content and real-time viewing type content being distributed together. You.

(Necessity of Protecting Rights Regarding Content Protection, Personal Information Protection, etc.) This comprehensive data distribution service directly distributes contents to homes and the like as described above, and stores / copys / reproduces digitally in homes and the like. Because of this service, there are problems related to data falsification, copyright and other rights such as copying and reproduction that exceed private use. Therefore, it is necessary to protect and manage the rights of copyright holders, broadcasters, and viewers of the content.

[0015] Since conventional digital broadcasting is mainly viewed in real time, content encryption on a transmission path by conditional access, which limits terminals capable of receiving broadcasting,
This is content protection at the level of copy control for an external device, and switches a key related to encryption on a transmission line in a fixed time. Therefore, if the encrypted content of the transmission path is to be stored, all keys, PSI /
SI (Program Specific Information / Service Informatio
(n, program specific information / program arrangement information), etc., need to be accumulated, which causes duplication of tables, security issues for contents, and the like.

In order to solve these problems, the present comprehensive data distribution service provides a method of presenting content to a viewer on the broadcast side, usage conditions, storing content in an encrypted state, conditional access to a terminal, conditional access to an individual, and the like. Is provided, and a service capable of protecting the right of the content such as the copyright is provided by performing the viewing control of the viewer, the storage control, the copy control, the encryption / decryption control, and the like based on these definitions. In addition, the relationship between the charging, the right, and the encryption unit in the present comprehensive data distribution service can be basically expressed by a relationship such as “the number of charging units ≧ the number of right units = the number of encryption units” (the right unit is the charging unit). May be exceeded.)

In the present invention, data to be defined on the broadcast side in the above-described comprehensive data distribution service will be mainly described. Here, with respect to the content defined in the unit intended on the broadcast side, data describing the definition is called metadata. Specifically, in the storage-type television broadcasting service, the broadcast side uses the copyright information, copy control, search information, information on billing such as viewing fee, etc., and the content to be distributed if the content is encrypted. A variety of information such as information for releasing the key (the key used for encryption, the location of the key, and information specifying the encryption method, etc.) is attached to the content and distributed. In the present invention, information on contents is referred to as “metadata”.

Basically, information other than contents can be generically defined as metadata. Conceptually, information for controlling contents on the receiving terminal side is:
For example, information for making a content storage reservation (name, genre, distribution location, scheduled distribution date and time of the content to be displayed on an EPG described later), usage restriction information (conditions for enabling viewing, age 20 and over) , A male, a contractor with the XX broadcasting station), an encryption key, and the like. That is, the metadata is mainly content control information, content content information, or content-related information.

(System Overview) As a system for performing the present comprehensive data distribution service, in addition to infrastructure using radio waves such as satellite broadcasting and terrestrial broadcasting, services using infrastructure using communication lines such as cable television and the Internet are possible. . In the present invention, as an example, a case where digital satellite broadcasting using satellites is used as an infrastructure will be mainly described. An outline of a system in which a comprehensive data distribution service is provided will be described.

FIG. 2 is an overall configuration diagram of the comprehensive data distribution service system. This system is roughly divided into a center side 10 which is a broadcast side for producing and distributing content, and a receiving terminal 3 which is a receiving side for receiving the content.
The receiving terminal referred to here is not limited to a terminal installed at home, but may be a public terminal, an in-vehicle terminal, or the like. In the center 10, as described above, in addition to the production of the content 1 and the generation and distribution of the PSI / SI 50 and the metadata 100 related to the content, the encryption and the encryption in consideration of the copyright, the viewing control, the billing, and the like are performed. Management of used keys, contents 1,
PSI / SI 50, management of metadata 100, user request acceptance, user (customer) management, etc. are also performed, and their production, generated content, PSI / SI, metadata, etc. can be distributed to the receiving terminal side via the satellite 12. Assembling into data and distribution to the user via the satellite by the transmission antenna 11 are performed.

In the comprehensive data distribution service, a method of generating metadata generated after completion of the content on the center side includes, for example, a method of generating by inputting necessary items according to a guide of a metadata generating apparatus; PC
In the case of directly creating a file by, for example, information such as a memo is generated at the time of content creation, and metadata may be automatically generated based on the generated information. The receiving terminal 3 on the receiving side receives information such as the content 1, PSI / SI 50, and metadata 100 via the satellite 12 via the antenna 2 and outputs the information to a monitor device such as a TV 9 or outputs after storing it in the storage medium 4. By doing so, it is possible for the user to view. Although the receiving terminal 3 may be built in a monitor device such as the TV 9 in the future, the receiving terminal 3 will be described here as a separate device.

The major features of the receiving terminal 3 for the comprehensive data distribution service include the content 1 and the metadata 10
In addition to having a storage medium 4 for storing information such as 0, for example, RMP (Rights Management & Protection:
Rights protection) system 14 and a service 20 described later. The RMP system 14 decrypts the encrypted and distributed data and encrypts important data in the receiving terminal 3, and is involved in processing and control of rights such as copyright protection, authentication, and billing.

RMP system 14, personal authentication device 20
0 performs personal authentication of a user who uses the receiving terminal and authentication of a group such as a family to which the user belongs. Further, the RMP system 14 has a configuration in which security is secured as a security measure against pirates and cryptanalysis, but a configuration in which the module can be replaced due to a decrease in security strength or the like is also conceivable. Further, the personal authentication device 200 refers to a module that is a medium for which security is protected, and may use a memory card using a memory medium, an IC card used for BS digital broadcasting, CS digital broadcasting, and the like.

The personal authentication device 200 is broadly divided into two functions, namely, a function for authenticating a group (terminal) and decrypting a transmission layer encryption, and a function for personal authentication and decrypting the encryption of the content itself. Since the function related to group authentication needs to be always fixed to the receiving terminal from the function, the function may be built in the receiving terminal. The device relating to personal authentication takes a portable form, and when the stored content 1 is played back by the external device 15 or the like, or when the external device 15 makes a contract for the content, the external device 15 is removed together with the removable medium 5. Sometimes used by connecting to.

The ground line 13 connecting the center side 10 and the receiving terminal 3 is used for charging the contents, acquiring the user's viewing history, charging history, requests, etc., as well as encrypting the contents, metadata, contents, etc. It is also used for transmitting information for decrypting metadata and the like, transmission of a key, and the like.

2. Data Configuration (Definition of Service and Event) The concept and unit of the above-mentioned contents, events, and services (channels) associated with the comprehensive data distribution service will be described.

FIG. 3 is a diagram showing the relationship between services and events in the comprehensive data distribution service. First, the relationship between a service and an event will be described. In this comprehensive data distribution service, the service 20 refers to a continuation of a broadcast program, which is equivalent to a channel in a conventional television broadcast, and an event is a broadcast which exists in the service 20 (channel) with respect to a time axis. Refers to a program. For example,
The time frame from 6:00 to 8:00 is event A21, 8: 0
The time frame from 0 to 9:00 is event B22, 9:00 to 1
In the time frame of 3:00, the event is C23. There may be no event at any given time in the service 20, but no more than one event. Further, an event is composed of a plurality of contents or a single content in the present comprehensive data distribution service.

(Example of Content Configuration in One Event) Next, a service delivered in a certain time frame, that is, a content configuration in an event will be described. FIG.
FIG. 3 is a configuration diagram of contents in a certain event.
First service 24 (events distributed on 100 channels)
Is a case where a service is composed of a plurality of contents such as a video-type content 1_27, a data-type content 2_28, and a data-type content 3_29. The second service 25 (event distributed on channel 101) is a single content, such as data type content 4_30, and the third service 26 (event distributed on channel 200) is video type content 5_31. Is configured.

(Content Definition, Unit) Here, the definition of content in the present comprehensive data distribution service will be described. The content in the present comprehensive data distribution service is conceptual and can be specified in units intended by the broadcast side, that is, by the broadcaster, instead of units indicating a certain physical quantity. The range that can be specified in the present comprehensive data distribution service is basically from an element unit (the minimum configuration unit of a video stream, an audio stream, an xml file, a bml file, an image file, etc.) to an event unit.

The unit intended by the broadcaster is a unit for restricting viewing to a user, and is a charging unit which is a data group provided to the viewer at the same fee, and a unit for allowing the viewer to receive data. , A control unit that is a data group such as a unit to be stored, a rights unit that is a data group to which the same copyright is applied, and an encryption unit that is a data group that is encrypted with the same key. Applicable. In other words, when a unique pay setting is set for a single still image file, the content is composed of a single still image file, all data sent in a certain broadcast time frame are set to the same price, and the same rights are set. In the case of the same parental control unit such as a group, the event may be a content unit. Even if the user belongs to a data group for which the same fee is set, if there are a plurality of right groups in the same group, the parental control unit is a finer unit of rights.

In general, when encryption is performed, a data group encrypted with the same key is subject to viewing restriction, so that the content unit is equal to the encryption unit.
However, when the encryption is not performed, the data group to which the finest restriction is applied among the other viewing restrictions is the unit of the content.

(Details of Content Configuration) Here, the service (100ch) 2 shown in FIG.
4 will be described in detail.

FIG. 5 is an explanatory diagram for each content.
The service (100ch) 24 is a video-linked service,
For the video / audio stream of the content 1_27, the content 2_28, which is the data content, and the content 3
_29 is an example in the case of interlocking. Content 1_27
Is a content composed of video and audio streams, is a content that can be viewed for free, and has a copyright a, and a copyright b different from the copyright a of the content 2_28, which is also free content. It is configured. Content 3_29 is paid content,
For example, it is assumed that the content cannot be viewed unless the user pays 100 yen, and the copyright is c.

In this case, the content unit intended by the broadcaster is composed of two groups, ie, a charging unit of 0 yen 17 and a charging unit of 100 yen 18 when a data group is constituted by a charging unit. Since there is a data group of, the unit for restricting viewing is a data group of copyright units, copyright a32, copyright b33, and copyright c.
34, the video stream and the audio stream of the copyright a32 are contents 1_27, the program details included in the copyright b33.bml are the contents 2_28, and the copyright c34.
Detailed information.bml and detailed information.mng included in content 3
Will be defined as

(Definition of Metadata) Next, the definition of metadata will be described. The metadata in the present comprehensive data distribution service basically refers to data that describes the content of the definition for the content defined in the unit intended on the broadcast side. The image is data such as a tag which specifically describes each content in FIG. 4, and by reading this data at the receiving terminal, presentation, storage, accounting processing, encryption / decryption processing, Causes the receiving side to perform contract processing and the like. It should be noted that the metadata can exist in a one-to-one relationship with the content due to the nature of describing a definition or the like corresponding to each content. Also, the content may exist one-to-many or many-to-one. However, in this comprehensive data distribution service, the metadata itself may be regarded as content.

Here, the major role of the metadata will be described. FIG. 6 is an explanatory diagram of metadata for controlling the inside of the receiving terminal. The metadata 100 is transmitted to the receiving terminal 3 together with the content 1 encrypted for protecting the copyright and the like.
Will be delivered to Note that the content may be transmitted without being encrypted when it is not necessary to protect the content by copyright, viewing control by pay broadcast, or the like.

The receiving terminal 3 controls the reception of the content 1, controls the storage of the content 1 and the metadata 100 on the storage medium 4, and controls the copy of the external device 15 based on the content described in the metadata 100 distributed together with the content. In the receiving terminal, authentication control of the application 35 that uses the content, decryption of the encrypted content by the scrambler / descrambler 36, and use of the license information on the content generated from the metadata are used by the receiving terminal. It performs encryption / decryption control of data requiring protection by the scrambler / descrambler 36, authentication control for the user, and the like.

That is, the metadata describes information for controlling the user's use of the content in addition to the content description of the content itself, and furthermore, the metadata is generated by defining the content on the broadcast side. It is possible to control the user's content usage range, usage conditions, and the like on the broadcast side. As another role of the metadata, when searching for the content stored in the receiving terminal, the metadata is also used for an EPG (Electronic Program Guide) for presenting information on the content to be distributed now and in the future.

(Metadata Classification) Next, description will be given of metadata classified according to the contents included in the metadata and the information requested by the receiving terminal. FIG. 7 is an explanatory diagram of classification by the function of metadata. In this comprehensive data distribution service, the metadata 100
For example, storage metadata 110, EPG metadata 1
20, key distribution metadata 130, metadata list 1
Classified into 40.

First, the storage metadata 110 is metadata that is distributed together with the content when the content is distributed, and the receiving terminal uses the storage metadata to control the reception, storage, viewing contract, various authentications and the like of the content. When the content is stored, the storage metadata is also stored. Therefore, when searching for stored content, the storage metadata is used to search for the content. Also, due to the above-described properties, the storage metadata exists one-to-one with respect to the content.

The EPG metadata 120 is not directly related to the control of the content being distributed, but is mainly used when displaying the EPG in the receiving terminal, and is not related to the storage of the content. It is also stored in the receiving terminal and is used for searching for contents to be distributed in the future, and for viewing / storing / storage of contents. Therefore, the EPG metadata does not necessarily exist in a one-to-one relationship with the contents when the functions of the EPG, for example, when the functions such as display and reservation are limited in units of programs without displaying or making reservations in units of contents. is not. However, when a function of the EPG, such as a viewing contract or charging for each content at the time of reservation, is performed, the same contents as the storage metadata are required.
There may be one to one. In this case, among the metadata for the EPG, the metadata for the currently distributed content can be the storage metadata.

The key distribution metadata 130 is an encryption key used when encrypting the content (the content key in the present invention).
Kk). Depending on the operation conditions of this service, this key can be present only when the content is distributed, or distributed before the content is distributed or after the content is distributed (after the content is acquired). The case where the contents are distributed together when the contents are distributed will be described.

Due to the above-described properties, the key distribution metadata 130 always exists on a one-to-one basis for contents encrypted by the content key Kk, and exists for contents that are not encrypted. Sometimes not. It can be embedded in the storage metadata 110 distributed at the time of content distribution, but in the present invention, it is distributed separately from the storage metadata 110.

The metadata list 140 in the present service is mainly used to identify the position of metadata from a stream being distributed, and stores mapping information between content and metadata. The generation unit of the metadata list can be generated in units of each TS, each service, each event, and the like. However, in the present invention, all metadata, that is, one metadata The description is based on the assumption that a list is generated.

(Example of description of metadata) The method of describing metadata in the present comprehensive data distribution service can be roughly divided into, for example, PSI / SI used in conventional digital broadcasting and the like, in particular, SI. Main description method in binary format that expands based on tables such as SDT and EIT in HTML, description method mainly in text format such as HTML, BML, XML, etc., and binary such as SDT, EIT etc. directly to text format such as XML It is divided into mixed format description methods that embed formats.

Here, as an example, a description will be given using a text format such as XML. FIG. 8 is an explanatory diagram of a description example of metadata. This figure shows the contents 1_27 of the service (100ch) 24 in the service model of FIG.
This is an image when metadata is defined for the content 3_29. Here, the metadata 1_111 is an image of storage (for EPG) metadata for the content 1_27, and the metadata 3_113 is an image of storage (for EPG) metadata for the content 3_29. When describing in text format such as XML, tag the items you want to define on the broadcast side as shown in the figure,
The value is described in a format in which the value is embedded in the tagged area (the end tag such as </ version> is omitted in the figure).

Here, a case will be described in which charging settings for each content are defined on the broadcast side. FIG.
FIG. 9 is an explanatory diagram in the case where a charge is defined in metadata. Here, for example, content 1_27 is free, content 2
When the definition is made on the broadcast side to be free, while the content 3_29 is paid for 100 yen, a tag indicating the charge is prepared in the information description area 37 regarding the metadata of each content, and the charge, the charge unit, and the like are described. . In the content description area 37 of the metadata 1_111, which is the metadata for the content 1_27, the content is specified in the broadcasting side as free for each content. Describe the information. Similarly, in the content description area 37 of the metadata 2_112 and the metadata 3_113 corresponding to the content 2_28 and the content 3_29, the charge and the charge of the content unit defined for each content are free (0 yen) and 100 yen. Is described.

In the case where the billing definition on the broadcast side is not a content unit but an event unit, for example, billing information for preparing and setting a billing tag in the description area 38 for events higher than the content description area. May be described. In this case, since the content 1_27, the content 2_28, and the content 3_29 have the same event, the metadata 1_11 for each
1, the same information is described in the event description areas of the metadata 2_112 and the metadata 3_113. A similar description is made for definitions other than billing, such as encryption, content structure, and information on copyrights and other rights.

(Encryption of Metadata) The metadata (storage metadata, EPG metadata, and key distribution metadata) in the present comprehensive data distribution is, as described above, information on an encryption key for content encryption, Since the information on the copyright of the content, the information on the storage of the content and the information on the control of the copy, etc., includes information which must be protected and must not be falsified, etc., the center encrypts the necessary parts. Therefore, there is a case where all information other than information necessary for identifying the metadata is encrypted.

Here, an image of encryption of metadata will be described. FIG. 10 is an explanatory diagram of encrypting information to be protected in metadata. In the metadata generated when defining the content, that is, the metadata 101 before distribution, the content 39 of the content, the configuration, and the like are described, information 39 for performing a search, information about encryption of the content, Information 40 to be protected such as rights, storage copy control, accounting, contract, etc., and information 41 for identifying the metadata itself are described. This metadata 101
Is distributed, the information part to be protected is encrypted 48 like the metadata 102, and the encryption information for the metadata is described and distributed in the description area 41 for the metadata itself. If there is no information to protect, encryption may not be performed.

3. Distribution Form (Distribution Image of Content / Metadata) Next, distribution of metadata and content defined as described above will be described. There are various distribution forms of the metadata, such as a case where the broadcast is distributed together with the content using a broadcast wave, and a case where the metadata is distributed using a terrestrial line or the like separately from the content. A case in which the content is distributed by broadcast waves together with other content will be described.

FIG. 11 is an explanatory diagram (1) of a distribution form of metadata, contents, and other control information. This figure is a distribution image of 1TS in this comprehensive data distribution service. The stream configuration is divided into a control-based stream group related to control of the receiving terminal such as PSI / SI and metadata, and a content-based stream group that distributes data constituting the content. Content 1_2
7, a service (channel) 100ch2 composed of a content group of content 2_28 and content 3_29
4 and a stream of a service (channel) 101ch25 composed of contents 4_30. ES1_44 and ES2_45 are a video stream and an audio stream constituting the content 1_27 distributed in 100 ch, ES3_46 is a data carousel including a file group constituting the content 2_28 and the content 3_29, and ES4_47 is a 101ch2.
5 is a data carousel including a group of files constituting the content 4_30.

In the most basic method for distributing metadata of the present comprehensive data distribution service, the metadata for these contents is transmitted by PSI / SI for receiving the stream (ES) for transmitting the contents at the receiving terminal. Stream group 42 (for example, when information equivalent to the SI part is described in the metadata, the SI part may not be delivered),
The content is transmitted as a stream group 43 different from the stream (ES) for distributing the content. This eliminates the need to extract metadata from the stream that transmits each content, and can simplify the metadata acquisition process on the receiving terminal side.

Also, the metadata stream group 43 is
When all metadata is transmitted as a single stream by the operation of this service, the metadata is composed of a single stream.
0, EPG metadata 120, key distribution metadata 13
0, the metadata list 140 may be distributed as a separate stream, or the EPG metadata 120 alone may be distributed as a separate stream.

FIG. 12 is an explanatory diagram (2) of a distribution form of metadata, content, and other control information. This figure is a distribution image of 1TS114 in the present comprehensive data distribution service, and includes content 1_27, content 2
_28, a service (channel) 100ch composed of a group of contents 3_29 and a service (channel) 101ch composed of a content 4_30
This is an image of each of the 25 streams. ES3
_117 and ES4_118 are a video stream and an audio stream constituting the content 1_27 distributed in the 100ch24, and ES5_119 is a content 2_28,
The data carousel includes a group of files constituting the content 3_28. The ES6_152 is a data carousel including a group of files constituting the content 4_30 of 101ch25.

In the most basic method of distributing metadata of the comprehensive data distribution service, metadata for these contents, metadata 1-4_111, 11
PSI / SI 115 for causing a receiving terminal to receive a stream (ES) for transmitting contents at 2, 113, 151
(For example, when describing information equivalent to the SI part in the metadata
In some cases, the SI portion is not distributed), and the content is transmitted as a stream 116 different from the stream (ES) for distributing the content. This eliminates the need to extract metadata from the stream that transmits each content, and can simplify the metadata acquisition process on the receiving terminal side.

(Metadata and Metadata List) Information required for metadata distribution in the comprehensive data distribution service will be described. In conventional digital broadcasting,
The content was recognized and received by the receiving terminal using PSI / SI, but if the unit of the content is defined as the unit intended on the broadcast side as in this comprehensive data distribution service, the meta Since it is necessary for the receiving terminal to further recognize the data, conventional PSI / SI alone is not sufficient. For this reason, information that complements PSI / SI is required to receive metadata and content. (If information equivalent to the content described in the SI is included in the metadata and the SI itself is not used, In particular, it is information that complements PSI.) The information that enables the receiving terminal to identify the metadata and the content and enable reception is called a metadata list in the present comprehensive data distribution service.

Here, the structure of the metadata list will be described. FIG. 13 is a diagram illustrating functions of the metadata list. This figure is an image of the metadata list 140 for the contents 1_27, 2_28, and 3_29 in the service (100ch) 24 described above.

The metadata list 140 includes information 1 for identifying a corresponding content from a plurality of contents.
27, information 128 for identifying corresponding metadata from a plurality of metadata, and version 12 of metadata
9, information 150 for identifying where in the transmission stream the metadata is distributed, date and time 131 when the metadata list is distributed, version 132 of the metadata list itself, and the like. When a content selection request from the user or the receiving terminal occurs, the corresponding metadata identification information 128 is determined based on the identification (ID) information 127 of the requested content and the like, and the stream whose metadata is being distributed is determined by the metadata position 150. , And the corresponding content can be obtained from information such as the configuration and position of the content described in the metadata.

Here, for example, the carousel 119 of ES5
Module 1 distributed within the case of acquiring content 2_28 by program introduction.bml123 will be described. First, the same identification (ID) value portion is identified from the content identification (ID) 127 of the metadata list 140 from the information of the content 2_28 which is a request from the user, and the metadata 2_112 corresponding to the content 2_28 is recognized. , Position 1 during distribution of metadata 2
The module 2 receives the metadata 2_112 from the 50 information and analyzes the structure and the position of the content, thereby recognizing the distribution position of the module 1: program introduction.bml123. This makes it possible to extract the necessary module 123, module 1: program introduction.bml, from the ES5 carousel. The above is the basic role and structure of the metadata list.

The method of obtaining the metadata list varies depending on the operating conditions of the system of the comprehensive data distribution service.
Considering the case of operation with the most basic PSI and metadata, specify the PID, stream format, etc. for transmitting metadata to the PMT in the PSI, and create a metadata list with the default module in the stream When the content is transmitted and the receiving terminal always obtains the content, by obtaining the default module, the metadata list can be obtained. When performing conditional reception of the metadata list and the metadata, it becomes possible by defining the conditional reception in the PID setting area for transmitting the metadata in the PMT.

(Positioning in Receiver) Here, other roles of the metadata list will be described together with the positioning of the metadata, the metadata list, and the content in the receiving terminal. In the present comprehensive data distribution service, the method of distributing metadata is broadly divided into a case of distributing the content at the time of distribution and beforehand, and a case of distributing only at the time of distribution or when necessary. The former is an effective distribution method in a form of distributing metadata using broadcast waves, and the latter is an effective distribution method in a distribution form using a terrestrial line or the like. In this example, the former distribution method will be mainly described.

The metadata is generated and distributed one-to-one with the content. Due to its characteristics used by the EPG function 133 in the receiving terminal, the metadata is determined not only by the content being distributed but also by the operating conditions. The content to be distributed for a given period (for example, one week) is also generated and distributed. Therefore, as the amount of content increases, the amount of metadata increases accordingly. In a mechanism that always receives and accumulates metadata when necessary, when a large amount of metadata is required by the EPG 133 or the like, processing for acquiring the metadata is performed. An enormous amount of time is required.

In the comprehensive data distribution service, in consideration of the above, metadata distributed in advance is stored in the storage medium 4 in the receiving terminal in advance, and the content of the stored metadata is stored in a time baseball broadcast or the like. By acquiring and updating only the corresponding metadata when updated by an extension or special program, etc., it is possible to cope with a case where a large amount of metadata is required by an EPG or the like. In addition, the metadata for EPG and the metadata required for storing the content are basically the same metadata (although it may be rarely different depending on the update timing), but the functions required for EPG, For example, when a content viewing contract is not performed from the EPG, or when a charging process for storage reservation is not performed, metadata in which some information of the metadata when the content is stored is deleted may be transmitted for EPG.

Here, the difference between the metadata at the time of content storage and the metadata for EPG in the present comprehensive data distribution service will be described. FIG. 14 is a diagram illustrating positioning within the receiving terminal. Here, the metadata at the time of storing the content is metadata corresponding to the content currently being distributed, which is metadata 1_111 in the figure.
Since the EPG metadata is metadata for the content to be distributed during distribution, the metadata at the time of content accumulation corresponds to a part of the EPG metadata. Therefore, even if information is partially deleted in the metadata for EPG, part of the information is not basically deleted in the metadata for the content being distributed.

In this comprehensive data distribution service, the metadata of the content to be stored is deleted in order to effectively use the capacity of the storage medium 4 in the receiving terminal, and delete the metadata whose content distribution time has passed since the receiving terminal. Data is stored in an area different from the EPG metadata stored in advance. Furthermore, in this comprehensive distribution service, the metadata required at the time of content storage includes the metadata distributed according to conditions such as the timing of updating the metadata and the metadata storage processing time at the receiving terminal, and the metadata stored in the storage medium. Since the contents may be different from the metadata stored in advance, the corresponding metadata is always reacquired from the metadata being distributed.

Further, the metadata for the content being distributed and the metadata for the content to be distributed are:
It may be transmitted as the same metadata stream, but may be transmitted as another stream.
Similarly, the distribution of the metadata list and the metadata can also be transmitted in separate streams.

(Concept of All-Station Metadata) Next, this comprehensive data distribution service is performed by a plurality of broadcasters by a plurality of TSs.
A description will be given of a method of distributing metadata in the case of using (Transport Stream).

FIG. 15 is an explanatory diagram of the distribution form of metadata when a service is provided by a plurality of TSs. As shown in the figure, the distribution form of metadata when operation is performed with a plurality of TSs is case 1_51, case 2_52, and case 3_5.
There are three possible configurations.

Case 1 is a distribution form in which metadata for contents in each TS is distributed only in each TS. Therefore, a receiving terminal that can receive 1 TS at the same time can update the metadata of its own TS while receiving the TS, but it is difficult to update the metadata of another TS. For example, if the metadata of TS2 is updated while watching a real-time drama on TS1, the metadata of TS2 cannot be acquired while watching the drama. And need to receive TS2. However, in the delivery mode of Case 1, since the metadata required for each TS only needs to be delivered by each TS, the transmission area in the TS occupied by the metadata is small.

Case 2 is a delivery mode in which not only the metadata for the contents in each TS is transmitted in each TS, but also the metadata of other TSs is similarly transmitted in one TS. As a result, the transmission area in the TS occupied by the metadata is significantly increased as compared with the case 1 (other TSs).
), And it is possible to cope with the update of the metadata of another TS even while the content is being viewed by the receiving terminal having the number of simultaneously receivable TSs of 1TS. Case 3 is a case where metadata is transmitted as dedicated TS0. Since the metadata is distributed only in the dedicated TS0, the transmission area occupied by the distribution of the metadata in each TS can be zero. However, the receiving terminal with 1 TS that can receive
Even if the metadata of S is updated, the movement of the TS for acquiring the metadata occurs. However, the major difference from case 1 is that, in case 1, a receiving terminal capable of simultaneously receiving the number of TSs in the total data distribution service is required in order to support updating of the metadata of all TSs. In case 3, if the number of simultaneously receivable TSs is 2TS, the receiving terminal can cope with all metadata updates.

In consideration of these conditions, the present comprehensive data distribution service operates in a two-stage metadata distribution mode depending on the performance of the receiving terminal. For example, TS of the receiving terminal
At the stage where the number of simultaneous receptions is 1, the operation according to Case 2 is performed, and at the stage where the number of simultaneous receptions of the TS of the receiving terminal becomes 2 or more and the environment becomes complete, the distribution of the metadata using the dedicated slot as in Case 3 is performed.

4. Use of metadata (How to use metadata) Next, the usage of metadata in this comprehensive data distribution service will be limited
G, search, reservation, viewing contract, authentication, switching of content being presented will be described as an example.

(Conditional Reception System Using Metadata) First, a conditional access system using metadata will be described. FIG. 16 is an explanatory diagram of a metadata encryption method for performing conditional access. For example, terminal (group) contract information 82 and personal contract information 83 as information related to conditional access possessed by the receiving terminal 3 on the receiving side when the initial contract before receiving the content is completed in order to receive the paid service.
Is raised. The terminal (group) contract information 82 includes a contract carrier code and a work key Kw that have contracted in the group.
1, including contract code, terminal ID, etc., and personal contract information 83
Includes a business code, a work key Kw1, a contract code, a personal ID, and the like relating to a personal contract with which a contract has been made for each user. The limited reception in the present service is to perform limited reception of the content by using the information, the metadata information, the content, and the key used for encrypting the metadata.

As described above, the content 1 is encrypted with the content encryption key Kk. The storage metadata 110 includes information such as the content ID of the corresponding content, the company code, the work key Kw1_ID, the encryption method of the content, the encryption method of the metadata itself, and the distribution position of the encryption key, and is the same as the content. The part storing the information to be protected by the content key Kk is encrypted. Key distribution metadata 130
Includes the business code, the work key Kw1_ID, the contract code, the encryption method of the key distribution metadata itself, the corresponding content ID, the content key Kk, etc. Work key Kw1 assigned to
Is encrypted by

Next, the flow of these encrypted contents and metadata at the receiving terminal in conditional access will be described. FIG. 17 is a flowchart of metadata and content reception and accumulation in conditional access. The flow of content and metadata in conditional access is basically the same as the flow of content reception, and starts with a user request 306. When a content reception request by a user such as a content ID occurs, as described above, the storage metadata is received by the PSI process and the metadata list process (84). The receiving terminal compares the provider code, Kw1_ID, contract code, etc. stored in the storage metadata with the terminal contract information and the personal contract information in the receiving terminal (8).
5) If there is no corresponding company code, contract code, etc. in the receiving terminal, it is out of the contract and the reception of the limited reception content is rejected (92).

On the other hand, if the corresponding company code, contract code, and the like exist in the terminal contract information and the personal contract information, the contents are determined to be contents in the contract, and the contents key of the storage metadata is determined.
The key distribution metadata is acquired from the Kk position (86). The receiving terminal uses the work key identification Kw1_ID stored in the metadata for key distribution or the metadata for storage, and the work unique to each business that is stored in the receiving terminal in advance by EMM1 and EMM2 described above. The key Kw1 is identified, the encrypted content key Kk in the key distribution metadata is decrypted by the work key Kw1, and stored in the receiving terminal (87).

Next, the encrypted part of the storage metadata is decrypted using the acquired content key Kk, and it is determined whether or not the user can use the content based on the content usage restriction information such as the parental rate and the regional restriction information (88). If the content is out of the usage range of the user, the reception of the content is rejected as in the case of the content out of the contract (92). On the other hand, if the content is within the usage range of the user, it is determined whether the content is to be stored or to be reproduced in real time based on a user request and information such as whether or not the content is stored in the storage metadata (89).

At the same time, the encrypted content is obtained based on the configuration of the content stored in the storage metadata, position information during distribution, and the like. Content is divided into a case where the content is viewed in real time and a case where the content is viewed after being stored in the storage medium. When viewing in real time (reproduction), a viewing contract process (91) is performed, and decryption / reproduction of the encrypted content is performed using the content key Kk obtained from the key distribution metadata. On the other hand, when viewing after storage, the encrypted content is stored, and then the content is extracted again (90).
1) is performed. When storing encrypted content for storage metadata, copy it in the receiving terminal and perform the process involving decryption, or receive it again from the stream being distributed and store it with the content as encrypted, When viewing in real time, it is discarded in the receiving terminal after decoding. The method of using metadata when performing conditional access using the metadata in this service has been described above.

(EPG) As an EPG presentation method in the present comprehensive data distribution service, presentation by an EPG as an application prepared in advance in the receiving terminal and presentation by EPG content as a service are conceivable. Below, E
The method of using metadata by PG will be described.

FIG. 18 is an explanatory diagram of a method of using metadata in the EPG. The method of using EPG metadata as an application or service is basically the same for quoting the contents of a program to be displayed, but the quoting method for quoting information from the metadata is different. Since the EPG as an application is prepared in the receiving terminal in advance, it is not possible to directly specify the metadata to be displayed, so the current date and time is obtained from the time in the receiving terminal, the date and time information, the network, channel, etc. displayed by the user Then, the corresponding metadata is identified by the designated information and the necessary information is embedded in the prepared frame to display the EPG. In the case of the EPG image 93 here, “CS digital broadcasting”, “06/27/2000”, “8:00 to 9:00”, “10
The information is extracted from the EPG area 94 of the EPG metadata 1_121 from information such as "0ch" and displayed.

On the other hand, in the case of the EPG as a service, since the content is sent each time, it is possible to directly determine which metadata information is to be embedded in which frame, so that the necessary portion of the metadata is directly designated and displayed. It is possible. However, in both cases, when detailed information such as the availability of storage and the fee for pay broadcasting is displayed on the EPG, the information stored in the EPG metadata also includes information to be protected in the same manner as the storage metadata. At times, encryption is performed.

In this service, metadata for EPG is encrypted with a work key Kw1 unique to each business entity, and a work key Kw1all common to each business entity is used. In the case of using the work key Kw1 unique to each business operator, and when all the information of the metadata for EPG is to be shown to all users, the work keys Kw1 of all the business operators are previously stored in the receiving terminal by the EMM1 or EMM2 described above. It is necessary to store the common work key Kw1all in the receiving terminal in advance by using EMM1 or EMM2 when using the common work key.
Is stored.

(Search) Next, a description will be given of a method of using metadata in a search in the present comprehensive data distribution service. FIG. 19 is an explanatory diagram of a method of using metadata in a search. The search is basically performed when searching for a content that the user wants to view from a group of contents stored in the storage medium 4 of the receiving terminal.
5 is performed. 9 is a search screen image at the time of search
Reference numeral 7 denotes a list display image of the contents extracted by the keyword search, and a detailed screen image 98 is an image in which information of a certain content in the list of contents is displayed in detail, and both are stored together with the contents. Information on the content is displayed from the stored metadata 110. However, in the case of searching for contents scheduled to be broadcast in the future, the metadata for EPG 12
It may be indicated by 0.

In the present embodiment, as an example, a case where a search is performed from the storage metadata 110 will be described. When acquiring information from the storage metadata, the storage metadata itself is encrypted as described above in the present comprehensive data distribution service. It is necessary to display the encrypted internal information, which may involve a process of decrypting the metadata once. Therefore, in this comprehensive data distribution service, in order to improve the search processing speed between the search application 95 and the storage metadata in the receiving terminal, it is necessary to encrypt keywords, genres, and the like necessary for the search in the metadata in advance. Search table 96 that extracts information without information
Prepare etc.

Here, when performing a search for narrowing down the contents and metadata such as the screen image 97, an indirect access is made through the search table 96 or the like to improve the processing speed, and a more detailed contract, copyright In a case 98 in which encrypted information such as information relating to the content is presented, if the metadata is directly accessed and encrypted, the encrypted portion of the metadata is decrypted and content information is presented. However, in this comprehensive data distribution service,
Since all data related to copyrights and other rights are performed by the RMP function described above, metadata access is RMP
This is performed by the function, and only necessary information is presented to the search application.

(Reservation Processing) The metadata processing at the time of reservation of contents and the like in the present comprehensive data distribution service will be described. FIG. 20 is an explanatory diagram of a method of using metadata in reservation. The reservation processing of contents and the like is performed by registering user preferences (preferences) and user requests 306 such as reservation requests by EPG / search, by preference management, EP
G, application 350 such as search application
It is started by handing over to. Application 350
Is started, authentication for accessing the permitted area in the storage medium 4 is performed with the RMP 14, and when the access permission is returned from the RMP 14, the search table 96 in the access permitted area, an EPG similar to the search table, and the like. Table 99
For example, a metadata ID, a content ID, and the like for the content meeting the user's request are extracted.

Next, the application confirms the reservation to the RMP 14 based on the extracted metadata ID, content ID, and the like. The RMP 14 determines the actual EPG from the metadata ID and content ID passed from the application.
For example, the storage metadata 110 is obtained from the broadcast wave if the content is a content being distributed, and the content is decrypted in the RMP 14 if there is an encrypted part, and it is determined whether the content is viewable by the user. For example, a determination is made on a content use restriction such as whether the channel is a channel to which the user has subscribed or the content is permitted to be stored.

If the content is permitted to be viewed by the user, the RMP 14
, The reservation permission is returned. If the application is permitted to make a reservation, the application is directly encrypted if it is not encrypted.
And the schedule management function 35 in the receiving terminal 3
Register the reservation in 2. Then schedule management function 35
2 confirms the time, and when the distribution time comes, sends a content reception request to the reception processing function 353. In this example, only the content unit is described, but the unit of the reservation in the comprehensive data distribution service can be an element unit to a service unit in a similar manner.

Here, the above-described specification of the content that meets the user's preference and request will be specifically described. FIG. 33A is an explanatory diagram when the user specifies information for determining preference in advance to the receiving terminal. First, in the case where the user designates information on which the preference is to be determined in advance to the receiving terminal 3, the user designates his / her favorite genre, hobby, age, etc. from the menu screen of the receiving terminal 3 in advance. (Here, hobbies: watching sports, genre often seen: professional baseball).

Next, the genre of the content is inserted into the metadata (EPG metadata) corresponding to the content (here, the genre of metadata 1: sports,
The genre of metadata 2 is movie, the genre of metadata 3 is drama, content and metadata are distributed. Thereby, the receiving terminal 3 can automatically reserve and automatically accumulate the content (here, sports) based on the registered user preference information such as the genre.

FIG. 33 (b) is an explanatory diagram when the receiving terminal automatically judges the user's preference and stores the content. Next, in a case where the receiving terminal 3 automatically judges the user's preference and accumulates the content in accordance with the user's preference, the content genre is received when the viewing contract is made from the storage metadata. It is registered in a profile (sometimes stored in the personal authentication device 200) in the terminal 3. At this time, the genre and the like are described in the storage metadata in advance and distributed.

The receiving terminal 3 collects information such as genres registered in the profile or the like (here,
Content x1: sports, content x2: sports, content x3: movie), and a genre that the user often views are specified. Next, the genre of the content is included in the metadata (EPG metadata) corresponding to the content (here, the genre of metadata 1: sports, the genre of metadata 2: movie, the genre of metadata 3: drama ), Content, and metadata. Thereby, the receiving terminal 3 can automatically reserve and automatically accumulate the content (here, sports) based on the user preference information such as the totaled genre.

(Reserved content reception / storage processing)
Reception and storage processing of reserved content and metadata in the present comprehensive data distribution service will be described. FIG.
FIG. 8 is an explanatory diagram of reception and accumulation processing of content and metadata at the time of reservation. As described above, the schedule management function 352 in the receiving terminal 3 that has been registered by the reservation processing makes a reception request to the reception processing function 353 when the distribution time comes. Upon receiving the reception request, the reception processing function 353 first receives the storage metadata 110 for the content 1 from the broadcast wave, similarly to the flow at the time of conditional access. If there is no storage metadata for the content, or if the PSI or metadata has information specifying a conventional broadcast (BS digital broadcast, CS digital broadcast, etc.), the content 1 is transferred to the conventional CAS function 354. Then, the CAS decrypts the content, and then reproduces the content on the TV 9.

If the content encryption in the CAS and the service is duplicated, the CAS returns the content to the RMP after decryption. On the other hand, if the metadata exists, is acquired, and the information indicating the comprehensive data distribution service is described in the metadata, the storage metadata 110 is passed to the RMP 14.

In the RMP 14, if the storage metadata 110 is encrypted, the key distribution metadata 130 is acquired in the same manner as in the flow for conditional access, and is stored in the terminal (in the RMP).
The content key Kk is obtained by decrypting with the work key Kw stored in advance in. Next, the RMP 14 decodes the storage metadata 110. The RMP 14 checks whether the user is permitted to store the content 1 and
If permitted, the storage metadata 110 and the content 1 are received and stored in the storage location indicated by the storage metadata 110 while being encrypted.

The metadata may be decrypted in the RMP 14 and then re-encrypted. However, basically, as described above, the above-described processing is performed using the stored metadata copied in the RMP 14, and The use metadata 110 is stored as it is. Similarly, at the time of reproduction, after the metadata for the content is determined by the RMP 14, if the content requires the license information, the content is also determined together with the license information, and if permitted, the content is reproduced. In this service, a part or all of the reception processing function may be included in the RMP function in order to handle metadata.

(Viewing Contract Process) Next, a description will be given of a viewing contract process using metadata in the present comprehensive data distribution service. FIG. 22 is an explanatory diagram of the metadata processing in the viewing contract. In this service, the viewing contract process is performed by storing metadata 1 to be stored together with the content.
10 is used. However, the same information as the storage metadata is stored in the EPG metadata, and when the EPG has a contract function, the EPG metadata can be used. When the user performs the viewing contract process, the receiving terminal
On the TV screen or the monitor, the information 355 of the content stored in the storage metadata 110, the contract 356,
A contract screen 550 including information on the billing 357 is presented.

[0099] When there are a plurality of contract forms for making a content viewing contract according to the contract screen 550, the user selects one of them. When the contract is made, the receiving terminal generates the license information 358 from the information on the contract selected from the storage metadata and the information such as the content key Kk stored at the time of receiving the content when the content is received in the receiving terminal. Then, the data is encrypted in the receiving terminal and transferred to the personal authentication device 200. Alternatively, the receiving terminal uses a secure transmission path to transfer the data to the personal authentication device 200 and perform encryption in the personal authentication device.

When the viewing contract processing is performed, the storage metadata is copied in the receiving terminal in the same manner as when the content is received, and when it is discarded after the processing, it is decrypted for processing. It is possible not to perform encryption again. However, in contract processing for moving or copying content to a removable medium or the like, encryption may be performed again after storing necessary items for copying storage metadata. When presenting information on the contracted content in the personal authentication device, information on the content such as the title and content of the content is stored in the permission information from the storage metadata.

(Authentication) Next, authentication using storage metadata in the present comprehensive data distribution service will be described. FIG. 23 is an explanatory diagram of a method of using metadata at the time of authentication. When the content is reproduced in the present service, the permission information 358 and the personal information 359 of the content generated by the viewing contract process described above and stored in the personal authentication device 200, and the storage metadata 110
Using RMP14, authentication for content viewing is
Done in The authentication information required at the time of reproduction includes a viewing expiration date of the contracted content, an age limit of an individual, and the like.
When generating viewing history, charging history information, and the like, it is also generated based on the storage metadata 110, the personal information 359 in the personal identification device 200, the permission information 358, and the like. Therefore, the metadata in the present comprehensive data distribution service is used as a base for generating information such as billing information in addition to generating license information in the receiving terminal.

Here, the personal authentication device 200 stores personal information and permission information for each content, and the personal information is mainly used for authentication at the time of content contract.
The permission information is mainly used when authenticating whether the reproduction right (viewing right) is valid at the time of reproducing the content. At the time of contract, the usage restriction information stored in the storage metadata (here,
(20 years old or older) is compared with the personal information (20 years old in this case) in the personal authentication device 200, and it is authenticated whether or not the user can view. Next, when content viewing is permitted, permission information is generated.

The authentication of the reproduction right (viewing right) at the time of reproduction is performed based on the information such as the expiration date and the payment status stored in the license information, the time in the receiving terminal 3, and the like. Authenticate. Here, the determination is made based on the expiration date of three days, the fee paid, and the time in the receiving terminal 3. Here, when it is confirmed by the RMP in the receiving terminal 3 that the fee has been paid and the expiration date has been reached, the content can be reproduced.

(Switching Process During Content Presentation) Next, a method of using metadata during content presentation of the present comprehensive data distribution service will be described. FIG.
FIG. 8 is an explanatory diagram of metadata processing when switching the content being presented. Here, a case in which the content is switched during presentation of one content is shown. For example, the content 1_27 can refer to the content 2_28 and the content 3_29 by a link or the like while presenting the content. Similarly, a link can be made from the content 2_28 to the content 1_27 and the content 3_29.
29 is a case where only a link to the content 2_28 is allowed.

When it is considered that the content 1_27 is currently being presented, the receiving terminal for the present comprehensive data distribution service uses the information of the metadata 1_111 to transmit the content 1_27.
27 is presented to the user. Then, jump 2 in content 1 to allow the user to present content 2
When the button or the like is pressed, the receiving terminal acquires link information for the content 2_28, and displays the content 1 currently being presented.
Recognition of a change to another content ID or the like from the ID_27 or the like is recognized.

The receiving terminal acquires the ID of the corresponding content, the metadata ID, the metadata position, and the like from the information of the reference destination in the metadata.
The metadata 2_112 is acquired from the location information “100ch..content2..metadata2.xml”, and the content 2_28 is presented based on the content described therein. As described above, the method of using metadata during content presentation in the present comprehensive data distribution service means that when a link or a move between contents is performed, the link destination and the meta data of the destination are determined by reference content information described in the metadata. This refers to acquiring data, its storage position, and the like, reading metadata for the corresponding content based on the information, and presenting the corresponding content.

5. Service form (Service flow) Here, the flow of the service actually received by the user in the comprehensive data distribution service is from the time the user obtains the terminal to the time the content is viewed, before and after receiving the content. The description will be made in two broad categories.

FIG. 25 is an explanatory diagram of a service procedure in the comprehensive data distribution service. First, the pre-content reception 300 will be described. In this service, before receiving the content 300, the user obtains the receiving terminal 30
1 until the content is ready to be received.
If the user receives this service at the end of the acquisition / installation 301 of the receiving terminal, the user can receive free broadcast content that does not require content protection, that is, unencrypted content. However,
An initial contract 302 is required to receive encrypted content of a protected service or a paid service, which is a feature of the present service.

The initial contract 302 in this service is
This is to register the information of the receiving terminal owned by the user and the personal information of the user on the center side. The information of the receiving terminal includes the terminal ID, a service contracted for each terminal (that is, a contract for each group such as a family), a settlement method thereof, and the like. The user's personal information includes the name, address, age, contracted service (channel), event (program), and information on the payment method for pay broadcast viewing (such as a designated bank account, Credit card, settlement ability, etc.).

As a method of registering such information, a postcard obtained at the same time when the terminal is obtained, registration by telephone, registration on the Internet, and the like can be considered. In this service, the contract before receiving the content with the center is passed by the information of the receiving terminal and the personal information as described above, and the center forms the basic information of the customer management by the information.

At the same time, the center side generates contract information 303 generated based on the above information, and distributes the contract information to the receiving terminal owned by the user. The receiving terminal receives 304 the contract information. In this way,
Reception of contents with protected contents, pay broadcasts, etc., which is a feature of this service, becomes possible. The contract information in this service includes the encryption key required to receive the content to be protected, the contracted business operator,
Refers to information such as channels and programs. The distribution method can be various means such as a communication line such as a telephone line, a memory medium, and a radio wave such as a broadcast wave. In the present invention, a case where distribution is performed using a broadcast wave will be described as an example.

Next, a description will be given of the time 305 when the content is received. The reception of the content means that the user who has completed the initial contract receives a request 306 to actually receive the content.
(For example, channel selection by the remote controller) until the requested content is reproduced 310. When the user makes a reception request 306 to the receiving terminal, a content acquisition process 307 is performed at the receiving terminal. In the content acquisition process 307, if the content is a storage-type service described above, the content is stored 308 in a storage medium in the receiving terminal, and the viewing contract 3
09 is performed and reproduced 310. On the other hand, if the content is a real-time service, a viewing contract 309 is made as it is and the user can view the content by being reproduced 310.

[0113] Also, regarding the charging for the pay broadcast in the present service, 311 is charged in advance and 3 is charged in the case of PPV (Pay Per View) which is charged each time when viewing or the like.
It is divided into twelve. The case of charging in advance is a case where a fee is paid monthly from a bank account or the like registered when the initial contract is made. On the other hand, PPV charging refers to a case where a fee is paid to a bank account for which an initial contract has been made, as in the case of pre-charging, at the time of a viewing contract. The above is the major flow of this service. Next, each of them will be described in detail.

(Initial contract before receiving contents) Here,
Before receiving content 3 in the service flow chart shown in FIG.
The initial contract 302 of 00 is specifically described. FIG. 26 is an explanatory diagram of the initial contract before receiving the content.
First, when the user obtains a terminal 301, the center side 10
The description will be made from the information held by the receiving terminal 3 on the receiving side. In this service, the center side 10 has a unique terminal ID and terminal key Km1 for each terminal allocated when the receiving terminal is manufactured.
And a unique work key Kw1 for each service provider and a unique service key for encryption. The center side 10 hands over the receiving terminal 3 in which the terminal ID and the terminal key Km1 are embedded to the user's hand.
And the terminal key Km1. Therefore, this terminal ID, terminal key Km
1. An initial contract is made using the company code, work key Kw1, etc.

After receiving the terminal, the receiving side registers the information of the group (family) using the terminal, the information of each user who uses the terminal, the service (channel) of the business operator who wants to view, the information of the event (program), and the like on the center side. I do. In the present invention, this is referred to as initial contract information 70. The initial contract information 70 includes, for example, an ID of a terminal to be used, information on a bank account or a credit card as a payment destination when viewing a pay broadcast, whether the user has a payment ability, a group (representative of a user), a user. The information includes information such as name, address, age, date of birth, etc., contracted services, whether the event is a group contract, an individual contract valid only for each user, and the like.

On the center side 10, the terminal ID of the receiving terminal used by the group is determined from the above initial contract information, and the group can be managed. Also, since the center side 10 can also determine the user who uses the terminal within the group based on the initial contract information, the individual authentication device 200 for each user can be distributed to the user. The information stored in the personal authentication device at the time of distribution to the user is referred to as personal information 201 in the present invention. The personal information includes an individual ID assigned to each user, a personal key Km2 different for each user, a terminal ID that is a group ID, contract information with a business operator, and the like.

The contract information (personal information) may be stored in advance in the personal authentication device 200 based on the initial contract information 70 and distributed to users, but is basically distributed by broadcast waves. The center side 10 can manage the information of the group to which the user belongs and the information of the individual user by distributing the personal authentication device to the individual user, and perform key management, customer management and the like based on the information. Here, if the number of users (users), names, other contracted channels, addresses, and the like are registered in the center side 10 by a postcard or telephone attached when purchasing the terminal, the center side 10 confirms the information. Then, the personal authentication devices 200 for the number of persons are distributed to the user side.

Next, the contract information of the group and each user will be described. The center side 10 generates contract information based on the initial contract information 70 registered by the user, and distributes the contract information to the user.
ssage) and ECM (Entitlement Control Message). However, in the conventional technology, contract information can be distributed only for each terminal.
2_72 is defined so that contract information can be distributed to individual users. The EMM that distributes the contract information for each terminal in the related art will be described as EMM1_71.

Both EMM1 and EMM2 have different terminal keys for each terminal.
It is encrypted at the center side by Km1 and distributed to each group. EMM1 is the terminal ID, group contract operator code which is group contract information, work key unique to the contract operator
Kw1, Kw1_ID for identifying the key, a contract code such as tier / flat, and the like are included. EMM2 includes a terminal ID, a personal contract operator code which is individual contract information contracted by an individual, a work key Kw1 unique to the contract operator, a Kw1_ID for identifying the key, a contract code such as tier / flat, etc. ,
A personal ID for filtering information for each user in the receiving terminal (within the group) is included.

[0120] With these pieces of information, the receiving terminal 3 on the receiving side can recognize the contract information. EM
For the information of M1 and EMM2, not only in the receiving terminal 3,
Part of the content is also transferred to the personal authentication device 200, stored as personal information, and used when the content in the receiving terminal 3 is portable. Since the ECM 73 is encrypted and distributed using the work key Kw1 of each business operator in the same manner as the conventional digital broadcasting CAS technology, the ECM 73 can receive only the ECM of the business operator contracted in the initial contract. The information distributed by ECM includes Kw1_ID for identifying the work key, company code,
It includes a contract code such as tier / flat, a scramble key Ks for encrypting a stream for distributing content in the transmission layer, and the like. The ECM 73 is decrypted on the receiving terminal 3 side by Kw1 distributed by the EMM, and the encryption key Ks of the transmission layer can be obtained.

In this service, the value of the work key Kw1 of EMM1, EMM2, and ECM1 can be different, etc., but they are all described as the same key value here. Further, regarding the EMM 2, not only the information of the contracted company but also the information of all the companies may be stored in accordance with the operation method of the metadata for EPG. The above is the mechanism of the initial contract before receiving the content.

(At the time of content reception) The content and metadata acquisition processing 307 at the time of content reception 305 in the above-mentioned service flow chart 25 will be described. FIG.
FIG. 4 is an explanatory diagram of a content acquisition procedure when receiving content. Content and metadata acquisition processing 307
Starts with a user request 306 which is a content reception request by the user. In the user request, the ID of the content, the ID of the event, and the like are specified. Based on the content ID and the ID of the event, the receiving terminal performs PSI processing 313 similar to the conventional digital broadcasting. Extract and obtain a metadata list from the distribution stream group.

Next, the metadata corresponding to the content is identified by the acquired metadata list, and the metadata list processing 314 is performed to obtain information such as the position of the identified metadata on the distribution stream. Get more metadata. The receiving terminal performs metadata processing 315 to obtain information such as content reception control and storage control described in the acquired metadata, a configuration in the content, and positional information during distribution.
Perform Step 6. The above is a series of flow of content and metadata acquisition processing in this service. Next, details of each process will be described.

(PSI Process 306) First, a method of obtaining a metadata list in the PSI process will be described. FIG.
FIG. 4 is an explanatory diagram of a metadata list acquisition method. The method of acquiring the metadata list in the PSI processing varies depending on the operating conditions of the system of the comprehensive data distribution service, but taking into account the most basic operation using PSI and metadata, the following is an example.

Transmit metadata to PMT 320 in PSI
A module 321 (module 0) which designates a PID, a stream format, etc., and becomes a default in the stream
Transmits the metadata list 140. When the content is always acquired on the receiving terminal side, the metadata list 140 can be acquired by acquiring the default module 321. When performing conditional reception of a metadata list and metadata, it is possible to define conditional reception in a PID setting area for transmitting metadata in a PMT as in the case of conventional digital broadcasting.

In conventional digital broadcasting, contents are recognized and received by the receiving terminal using PSI / SI.
If the unit of content is defined as the unit intended on the broadcast side as in this comprehensive data distribution service, it is necessary to make the receiving terminal further recognize the metadata that defines the content. Insufficient.

From this, in order to receive metadata and content, information that complements PSI / SI and the like is required (information equivalent to the content described in the SI is included in the metadata.
If it is not used itself, it will be information that complements PSI in particular). The information that enables the receiving terminal to identify the metadata and the content and enable reception is referred to as a metadata list 140 in the present comprehensive data distribution service.

(Metadata List Processing) Next, the metadata list processing 314 and the metadata processing 315 will be described. FIG. 29 is an explanatory diagram of a metadata list and a method of acquiring content using metadata. The metadata list 140 includes the content 1_27, the content 2_28, and the content 3_ in the service (100ch) 24 described above.
This is an image of the metadata list for the image 29. The metadata list 140 includes a content for identifying the corresponding content from a plurality of contents.
ID information 141, metadata ID information 142 for identifying the corresponding metadata from a plurality of metadata, version 143 of the metadata, information 14 for identifying where in the transmission stream the metadata is distributed
4. The date and time at which the metadata list is distributed, the version of the metadata list itself, other event IDs to which the content belongs, service IDs, and the like are included.

Further, in order to present a content in response to a request for only a service ID and an event ID as a user request, information 145 and the like for identifying default content in an event are also included. When a content reception request and a selection request are issued from the user, the receiving terminal receives the metadata list by the above-described PSI processing, and transmits the corresponding metadata 142 by the identification (ID) 141 of the content requested by the metadata list processing. Determine and its metadata location 14
In step 4, metadata is extracted and obtained from the stream being distributed.

Next, the metadata processing 315 that enables the acquisition of the corresponding content from the information such as the configuration and the position of the content described in the metadata includes, for example, ES1_44 and ES2_45 in the same manner as the distribution image described above. The case of acquiring the content 1_27 to be performed will be described.

First, the metadata list 14 based on information such as the content ID as the request 306 from the user.
0, the description position 146 relating to the corresponding content ID is identified, and the corresponding metadata ID 142, metadata position 14
Based on the information such as 4, the corresponding module 147 of the stream group 43 (carousel) for transmitting the metadata is obtained. By receiving the metadata 1_111 from the module 147 and analyzing the structure and position of the content,
The distribution positions of ES1_44 and ES2_45 are recognized, and thereby, ES1 and ES2 as contents 1_27 can be obtained.

The metadata includes information for identifying the default content in the event as in the metadata list, and further includes a start element in the content such as which element in the content to present. Is also included. In this example, the content 1 is described as the default content and the video stream as the start element. The above is the basic role of the metadata list processing and the metadata processing in this service.

(Positioning in Receiver) Next, positioning at the time of distribution of metadata and a metadata list and positioning in a receiving terminal will be described. FIG. 30 is an explanatory diagram of a metadata updating method. In the present comprehensive data distribution service, the method of distributing metadata is broadly divided into a case of distributing the content at the time of distribution and beforehand, and a case of distributing only at the time of distribution or when necessary. The former is an effective distribution method particularly in the form of distributing metadata using broadcast waves, and the latter is an effective distribution method particularly in a distribution form using a terrestrial line or the like. In this example, the former distribution method will be mainly described.

As described above, the metadata is classified into storage metadata 110, EPG metadata 120, key distribution metadata 130, and metadata list 140. The storage metadata and the key distribution metadata are generated and distributed one-to-one with the content due to their characteristics, and are required when receiving and storing the encrypted content 1. for that reason,
The storage metadata and the key distribution metadata may be distributed simultaneously with the distribution of the encrypted content, and may be stored together with the encrypted content when necessary.

The EPG metadata is used not only for the content being distributed, but also for a certain period (for example, one week) determined by the operating conditions, due to its characteristics used in the EPG function and the like in the receiving terminal. The content to be distributed is also generated and distributed. Therefore, as the amount of content increases, the amount of metadata for EPG also increases, and the mechanism that always receives and accumulates when necessary will acquire metadata when a large amount of metadata is required by EPG etc. Requires an enormous amount of time.

In consideration of the above, the comprehensive data distribution service stores a predetermined period of EPG metadata distributed in advance in the storage medium 4 in the receiving terminal in advance, and the content of the stored metadata is By acquiring and updating only the corresponding metadata when the time is extended due to a baseball broadcast or a special program or the like, it is possible to cope with a case where a large amount of metadata is required by an EPG or the like. The respective metadata also differs in the storage area of the storage medium 4 in the receiving terminal, and the storage metadata and the key distribution metadata include the content area 80 together with the content.
The EPG metadata is stored in the EPG area 81 collectively without being diffused and stored in the content area due to the characteristics used in the EPG and the like.

(Update of Metadata) Next, update of EPG metadata stored in the EPG area will be described.
In this comprehensive data distribution service, if there is no data in the EPG area 81 in the receiving terminal, such as when the receiving terminal is turned on for the first time after purchase, the metadata list described in the metadata stream group being distributed is used. EP with 140
All the G metadata 120 are accumulated. Thereafter, the receiving terminal compares the version number, distribution date, and the like of the metadata list 148 accumulated according to operation conditions such as a fixed time with the version number, distribution date, and the like of the metadata list 149 being distributed. The updated metadata is identified by the metadata version number or the like in the metadata list, and only the corresponding metadata is extracted from the stream being distributed based on the position information of the corresponding metadata and stored in the receiving terminal.

As described above, the metadata list has metadata position management for extracting metadata from a stream being distributed, association between contents and metadata, metadata version management function, and the like. However, regarding the association between the content and the metadata, when a certain rule is set between the ID for identifying the content and the ID for identifying the metadata, it may not be necessary.
(For example, when the ID of the content is 00001, the ID of the metadata is 00001M, and the rule in which “M” is always added at the end is defined in operation.)

6. Billing Service (Billing) Next, a billing method in this comprehensive data distribution service will be described. In this service, there are two methods: a billing method in the case where there is no return path only for a downlink satellite circuit or the like in which the receiving terminal is not connected to the ground line or the like; and a two-way return path in which the receiving terminal is connected to the ground line or the like and has a bidirectional return path. Billing is performed according to the phase of the step.

(Charge when there is no return path)
A charging method when there is no return path by the ground line 13 will be described. FIG. 31 is an explanatory diagram of a billing method when a return path is not used. In the billing method without a return pass in this service, an initial contract is made when a terminal is obtained, and the information is made using information such as a bank account and credit card information registered at the center. In this service, the contract method is that contract information 700
When paying 3000 yen by a monthly contract as in the above, all pay broadcasts contracted by the business operator (business operator A in this example) can be viewed (contract by channel, program by contract code such as tier / flat, etc.) Is also possible.), Or a case where a certain number of points are purchased by a monthly contract as in the case of the company B or the company C, and viewing is performed within the range of the points.

Regardless of whether or not there is a limit depending on the points, as described above, charging is performed from a bank account or the like registered by an initial contract. The contract information generated by the initial contract is distributed to the receiving terminal by storing the company code, the contract code, and the like in the EMM as described above. In the case of a point-based contract, point information 600 on the number of contracted points is also stored and distributed.

In the receiving terminal 3, if the number of distributed points is a group contract, the group information 60 in the receiving terminal is set.
2 is assigned as a group contract point 603, and if it is a personal contract point 604 according to a personal contract, it is allocated to personal information 359 in the personal authentication device. Point subtraction based on a viewing contract for each content, such as viewing and storage of content, is based on information of no metadata 100, in this example, "-1 point" for rental, "-3 points" for purchase, and the receiving terminal. This is performed by the point control 601 within.

In this service, the extra points are deleted at the time of renewal of the contract such as a monthly contract, a new point is added, and if the number of points purchased by the contract such as the monthly contract becomes excessive, the points are carried over to the next month. It is also possible to add to the number of points distributed again in the month. When adding points, it is possible to limit the upper limit of the number of points that can be added.

On the other hand, when all points have been used up and additional points are requested, it is possible to distribute the point information again by making an additional contract with the center side by telephone inquiry or the like. As a future service, it will be possible to update the number of points using mobile phones.

Here, a charging method when there is no return path described above will be schematically described. First, regarding the use within the number of points distributed on a monthly basis, the center distributes, for example, constant points on a monthly basis to the receiving terminal. On the other hand, the receiving terminal will carry over points from last month,
Plus the distributed points, hold the point information in the receiving terminal, and subtract the number of points from the point information held in the receiving terminal as a purchase fee for viewing rights of the content by the viewing contract process I do.

Next, when the points in the receiving terminal have been used up (when there are no more points in the receiving terminal), the user himself / herself sends the point to the center by using, for example, a telephone or the Internet. Please send me points. " Thereafter, the center distributes the points on a monthly basis in the same manner as the manner in which the points are sent.

That is, the point information managed by the center includes the number of points distributed monthly and the number of points additionally required and distributed. Further, the point information managed by the receiving terminal includes the number of points that can be used by the user (forwarded points + points distributed monthly) + additional points.

(Charging when there is a Return Path) FIG. 32
FIG. 4 is an explanatory diagram of a billing method using a return path.
The billing method when there is a return path is, in addition to the above-mentioned billing method without a return path, for example, adding a point number on a TV monitor and transmitting the contract information to the ground line 13.
Can be recognized by the center 10 customer management. If the number of points to be additionally used is a point related to a group contract, the number of points to be used is stored as group charging history information 608 in the group information 602 in the receiving terminal. Can also be temporarily stored as charging history information 609.

In this case, the history is collected in the receiving terminal 3 based on the call information 605 sent from the center side every fixed period, and the call control 606 uses the terrestrial line 13 to control the ten side customer management. , It is also possible to pay from a bank account or the like registered under the initial contract. In addition, it is also possible to perform billing processing by connecting the personal authentication device to an external terminal such as a public terminal connected to a center installed in a convenience store. Further, when the personal authentication device 200 is equipped with an electronic money function, it is possible to settle the above points as a fee.

Here, a charging method when the above-mentioned return path is present will be schematically described. First, the usage within the number of points distributed on a monthly basis is the same as "when there is no return path" until the center uses up the points distributed on a monthly basis to the receiving terminal. Next, when the points in the receiving terminal have been used up, as a method of distributing the number of additional points, for example, when the intention of purchasing points is displayed on a TV monitor, the receiving terminal connects the center to the ground line, Make a point request. The requested point is distributed via a satellite or a land line.

As a method of outputting the number of additional use points to the center, for example, the number of additional points used is output to the center instead of requesting additional points. Further, the used terminal information is held in the receiving terminal, and the used point information is collectively transmitted to the center according to the call information (the instruction to send the information). Each time a viewing contract is made, the number of points used in this viewing contract is output to the center.

As a billing method using a terminal (here, a KIOSK terminal) installed in a convenience store or the like, for example, the number of distribution points is stored in an IC card. When the number of points stored in the IC card is used, the points are subtracted, and can be added by the KIOSK terminal.

Further, the number of points used is stored in the IC card, the number of points used in the IC card is entered, and the used points are distributed to the center using the KIOSK terminal. That is, the point information managed by the center includes the number of points distributed monthly and the number of additional points used. In addition, since it is connected by the ground line,
The number of points stored in the receiving terminal can also be known. The point information managed by the receiving terminal includes the number of points that can be used by the user (carried-over points +
Monthly points + additional points).

With the above-mentioned metadata, the present comprehensive data distribution service enables the broadcast side to control the method of presenting content to the user, the use conditions, and the like, thereby enabling the protection of content rights and the protection of individual user rights. Service can be provided.

[0155] 7. Conclusion Here, some of the features of the present invention are exemplified below. -Units intended by the broadcaster (units for restricting viewing to users, such as billing units, which are data groups provided to viewers at the same fee, units for receiving data to viewers, units for storing, etc.) Control unit which is a data group, a rights unit which is a data group to which the same copyright is applied, and an encryption unit which is a data group which is encrypted with the same key. On the other hand, information about contents is created, and this is used as metadata and used as information for EPG (electronic program guide) and search.

In the metadata, the content of the content,
Includes various information such as copyright-related right information such as the use range and usage conditions, and content billing information. Based on this information, processing (reception, storage, search, content management, etc.) in the receiving terminal is performed. . -Metadata can be divided into storage metadata, EPG metadata, key distribution metadata, etc., and distributed after EPG metadata for storage and key distribution.
Except for the service, the delivery time depends on the service method. -Metadata contains highly confidential information that should be protected from tampering, such as information on content encryption, content copyright information, content storage, and copy control, so it must be encrypted. Since the metadata includes information to be encrypted, the metadata has a portion to be encrypted.

In the distribution of metadata, a metadata list in which information of distribution metadata is compiled is created so that the metadata can be updated in a difference manner, and the difference information can be obtained based on the metadata list. To do. -As a distribution method for individuals using the same terminal, contract information can be distributed to individuals using the same terminal using a new terminal ID and terminal key.・ Distribution that defines correspondence between content and metadata attached to the content, and management of content and metadata.

Performing service without using the uplink,
A service that uses the point method, which gives points to users in advance and subtracts these points every time content is purchased, and notifies the center using a telephone or other contact means when points are exhausted, and newly creates points. Obtain points, carry over the current points when renewing the contract, such as monthly, and add new points. -In the above-mentioned service system, the points that have been used up to now will be erased when a contract is renewed on a monthly basis, etc. In the point service system, by paying only the basic fee, and then paying for each purchase of the content, or by purchasing a desired number of points at the time of registration, and notifying the center or the like when it disappears, furthermore, Get points.

Distribution of contract information (EMM) to individual applicants via satellite at the time of notification of points to the center or the like. -As the delivery means, having a downstream delivery means different from a satellite such as a communication line or a convenience store.

[0160]

According to the present invention, as described above, by attaching metadata to each content, fine control over the content becomes possible, and a method of presenting the content to the user, usage conditions, and the like are controlled. As a result, it is possible to protect the right of the content, the right of the user, and the like.

[Brief description of the drawings]

FIG. 1 is a service configuration diagram of a comprehensive data distribution service.

FIG. 2 is an overall configuration diagram of a comprehensive data distribution service system.

FIG. 3 is a diagram showing a relationship between a service and an event in the comprehensive data distribution service.

FIG. 4 is a configuration diagram of content in a certain event.

FIG. 5 is an explanatory diagram of a content unit.

FIG. 6 is an explanatory diagram of metadata for performing control in the receiving terminal.

FIG. 7 is an explanatory diagram of classification by a function of metadata.

FIG. 8 is an explanatory diagram of a description example of metadata.

FIG. 9 is an explanatory diagram in the case where charging is defined in metadata.

FIG. 10 is an explanatory diagram of encrypting information to be protected in metadata.

FIG. 11 is an explanatory diagram (1) of a distribution form of metadata, content, and other control information.

FIG. 12 is an explanatory diagram (2) of a delivery form of metadata, content, and other control information.

FIG. 13 is a diagram showing functions of a metadata list.

FIG. 14 is a diagram showing positioning in a receiving terminal.

FIG. 15 is an explanatory diagram of a distribution form of metadata when a service is provided by a plurality of TSs.

FIG. 16 is an explanatory diagram of a metadata encryption method for performing conditional access.

FIG. 17 is a flowchart of metadata and content reception accumulation in conditional access.

FIG. 18 is an explanatory diagram of a method of using metadata in an EPG.

FIG. 19 is an explanatory diagram of a method of using metadata in a search.

FIG. 20 is an explanatory diagram of a method of using metadata in reservation.

FIG. 21 is an explanatory diagram of reception / storage processing of content and metadata at the time of reservation.

FIG. 22 is an explanatory diagram of metadata processing in a viewing contract.

FIG. 23 is an explanatory diagram of a method of using metadata at the time of authentication.

FIG. 24 is an explanatory diagram of metadata processing at the time of switching the content being presented.

FIG. 25 is an explanatory diagram of a service procedure in the comprehensive data distribution service.

FIG. 26 is an explanatory diagram of an initial contract before receiving content.

FIG. 27 is an explanatory diagram of a content acquisition procedure when receiving content.

FIG. 28 is an explanatory diagram of a metadata list acquisition method.

FIG. 29 is an explanatory diagram of a metadata list and a method of acquiring content using metadata.

FIG. 30 is an explanatory diagram of a metadata updating method.

FIG. 31 is an explanatory diagram of a billing method when a return path is not used.

FIG. 32 is an explanatory diagram of a billing method using a return path.

FIG. 33 is an explanatory diagram of user preference.

[Explanation of symbols]

1 content, 2 reception antenna, 3 reception terminal, 4
... storage medium, 5: removable media, 6 ... real-time viewing, 7 ... real-time + storage viewing, 8 ... storage viewing, 9 ... television, 10 ... center side, 11 ... transmission antenna, 12 ... satellite, 13 ... Ground line, 14 ... RMP, 1
5: external device, 17: charging group 1 (0 yen), 18: charging group 2 (100 yen), 20: service, 21: event A, 22: event B, 23: event C, 24: service 100ch, 25 ... Service 101ch, 26 ... Service 200c
h, 27 ... Content 1, 28 ... Content 2, 29 ... Content 3, 30 ... Content 4, 31 ... Content 5,
32: copyright group a, 33: copyright group b, 34
... Copyright group c, 35 ... Application, 36 ...
Scramble / descramble, 37: content description area, 38: event description area, 39: search information description area, 40: protection required area, 41: metadata identification area,
42: stream group such as PSI, 43: metadata stream group, 44: video stream (ES1), 45: audio stream (ES2), 46: carousel (ES3), 47: carousel (ES4), 48: encryption, 51 ... Case 1, 52
… Case 2, 53… Case 3, 70… Initial contract information, 71
... EMM1, 72 ... EMM2, 73 ... ECM1, 80 ... area for contents, 81 ... area for EPG, 82 ... terminal (group)
Contract information, 83: Individual contract information, 84: Storage metadata reception, 85: Limited reception determination, 86: Key distribution metadata reception, 87: Content key acquisition, 88: Content usage restriction determination, 89: Content storage determination , 90: storage of encrypted content, 91: viewing contract, 92: rejection of reception, 9
3 EPG, 94 EPG display area, 95 Search application, 96 Search table, 97 Search screen, 98
Detail screen, 99: EPG table, 100: metadata, 101: metadata (at generation), 102: metadata (at transmission, storage), 110: metadata for storage, 1
11 ... Metadata 1, 112 ... Metadata 2, 113 ... Metadata 3, 120 ... EPG metadata, 121 ... EPG metadata 1, 122 ... EPG metadata 2, 123 ... EPG
Metadata for key 3, 130 ... Metadata for key distribution, 140
... Metadata list, 141 ... Content ID, 142 ...
Metadata ID, 143 ... Metadata version, 144
... Metadata position, 145 ... Default content identification, 146 ... Corresponding content ID, 147 ... Module
1, 148: metadata list in storage medium, 149: distribution metadata list, 200: personal authentication device, 30
0: before receiving the content, 301: obtaining / installing the terminal, 30
2 Initial contract, 303 Contract information generation, 304 Contract information reception, 305 Content reception, 306 Viewing request, 307 Content acquisition processing, 308 Storage, 30
9: viewing contract, 310: reproduction, 311: billing (prior),
312 ... Charge (PPV), 313 ... PSI processing, 314 ... Metadata list processing, 315 ... Metadata processing, 316 ...
Content acquisition, 320 PMT table, 321 Module 0, 350 Application, 351 Schedule, 352 Schedule management function, 353 Reception processing, 354 CAS, 355 Content ID, 356
Contract information, 357: accounting information, 358: permission information, 35
9 personal information, 550 contract screen, 600 point information, 601 point control, 602 group information, 6
03: group contract point, 604: individual contract point, 605: call information, 606: call control, 607: history collection, 608: group charge history, 609: personal charge history, 700: contract information

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 7/173 630 H04L 9/00 601E H04N 7/167 Z (72) Inventor Iori Yamazaki Kanda, Chiyoda-ku, Tokyo 4-6, Surugadai F-term (Reference) 5C025 BA25 BA27 DA05 DA10 5C064 BA07 BB01 BB02 BC01 BC16 BC20 BC22 BC27 BD02 BD03 BD09 5J104 AA07 AA15 AA16 BA03 EA01 EA18 NA01 NA01 NA35 NA36 PA05 PA11

Claims (8)

[Claims] When a request for receiving an encrypted content constituting an event distributed from a center is made, metadata including content information and control information relating to the content is provided. Kw1) including the storage metadata partially encrypted with the content key (Kk) used when encrypting the content in content units, and including the unencrypted metadata included in the storage metadata. The contract code is compared with the terminal and personal contract code stored in the receiving terminal in advance to determine whether the content can be viewed. If the content can be viewed, the encrypted content included in the stored metadata is encrypted. The key distribution metadata including the content key (Kk) and encrypted with the work key (Kw1) from the position of the content key (Kk) Receiving the data, by the storage metadata or key distribution work key unencrypted included in the metadata (Kw1) identification information,
The work key (Kw1) stored in advance in the receiving terminal is identified, and the encrypted content key (Kk) in the key distribution metadata is decrypted with the work key (Kw1). A) decrypting the encrypted portion of the storage metadata, acquiring the encrypted content, and viewing the encrypted content. 2. When the electronic program metadata includes information to be protected for rights protection based on the electronic program metadata required for presenting the content,
The receiving method according to claim 1, wherein the electronic program is displayed by encrypting the electronic program metadata with the work key (Kw1). 3. When the storage metadata is received, content identification information, metadata identification information including content information and control information relating to the content, and metadata position information are stored correspondingly, and the content and the metadata are stored. The metadata list for enabling reception is obtained, and the storage metadata is identified and received by the position identification information of the storage metadata included in the metadata list, or the metadata is received. 3. The receiving method according to 2. 4. When searching for a desired content from a storage medium in which the content is stored, a search table is created by extracting information necessary for searching the content from the storage metadata and not requiring encryption. A search screen for reading stored information in the search table and displaying a list of contents or a detail screen for displaying detailed information of contents included in the search screen is created and displayed. 4. The receiving method according to claim 1, wherein a desired content is searched based on the received content. 5. When charging is performed using a downlink from the center to the receiving terminal, the center gives in advance points for viewing the content to a user of the receiving terminal, and transmits information on the points to the center. To the receiving terminal, the receiving terminal accumulates the points received from the center as charging history information, subtracts the points for each purchase or rental of the content, and notifies the center when the points are exhausted. The receiving method according to any one of claims 1 to 4, wherein the points are further acquired by doing so. 6. The receiving method according to claim 5, wherein the points accumulated in the receiving terminal are deleted or carried over at the time of contract renewal. 7. The receiving terminal accumulates, in the receiving terminal, the status of use of content viewing points as charging history information based on an individual or group contract, and further establishes an uplink between the center and the receiving terminal. Wherein the charging history information is distributed from the receiving terminal to the center, and the center distributes an additional point to the receiving terminal based on the charging history information. The receiving method described. 8. The accounting history information is stored in a removable medium detachable from the receiving terminal, and by connecting the removable medium to a desired external terminal, the external terminal subtracts the number of points used or goes to the center. 6. The system according to claim 5, wherein the transmission is performed to perform a billing process.
8. The receiving method according to any one of claims 1 to 7.