KR20070061228A - Metadata production system for protection of contents and its method - Google Patents

Abstract

A system and a method for making metadata for protecting contents are provided to make the metadata for protecting the contents by using MPEG-21 REL(Rights Expression Language) including content use rights and distribution information, and MPEG-21 IPMP(Intellectual Property Management and Protection) for protecting/managing the contents. A network interface(130) receives an MPEG-21 REL document from a license server(300). A metadata generator(110) generates protection/management metadata by combining the MPEG-21 REL document and the MPEG-21 IPMP generated from the MPEG-21 REL document. An integrated controlling/managing part(120) parses the MPEG-21 REL document to obtain media content information, receives a file path of a parsed digital item, and obtains the first/second password setting information by using the MPEG-21 REL document and the protection/management metadata. A digital item encryptor(140) inserts a watermark into the contents and encrypts the protection/management metadata by receiving the watermark and the first/second password setting information from the integrated controlling/managing part.

Description

Metadata production system for content protection and its method {Metadata production system for protection of contents and its method}

1 is a block diagram of an embodiment of a metadata authoring system for content protection according to the present invention;

2 is a flowchart illustrating a content protection method in a metadata authoring system according to the present invention.

Explanation of symbols on the main parts of the drawings

100: metadata authoring system 110: metadata generator

111: IPMP Generator 112: REL Inserter

113: protection management metadata generator 120: integrated control management unit

121: XL parse module 122: state manager

130: network interface unit 131: license receiver

132: tool transmitter / receiver 133: digital item transmitter

140: digital item encryption unit 141: watermark inserter

142: protection management metadata encryptor

200: user interface 300: license server

400: tool server 500: content consumption terminal

The present invention relates to a metadata authoring system for protecting contents and a method thereof, and more particularly, to the contents of a content requested by a consumer in a broadcasting / communication convergence framework (MPEC-21 multimedia framework) environment based on the MPEG-21 standard. AMP-21 REL (REL: Rights Expression Language, REL) containing usage rights and distribution information, and AMP-21 IPMP (IPMP: Intellectual Property Management and Protection, IPMP) for protection management of the contents It relates to a metadata authoring system and method for protecting the content by interworking.

At present, the boundary between the broadcasting network and the communication network is fused with each other, and the boundary between the broadcasting network and the communication network is blurred, and the supply of high quality content service is required to be made through various terminals and heterogeneous networks.

In such a complex environment, content providers are indiscriminately developing copyright-related technologies to protect their contents by maximizing their profit structure by blocking illegal copying of their contents. This copyright management and protection technology is called DRM (Digital Rights Management). However, since DRM was developed as a non-standard, there was a problem that caused confusion and interoperability between different DRM systems. In addition, there was a problem of generating overlapping investment and inefficient distribution structure of contents according to the development of technology with similar functions.

Accordingly, in order to efficiently manage contents that are authored and distributed for each content provider, standardization work for interoperable content protection management in the MPEG-21 IPMP field is currently in progress. At the same time, standardization work in the MPEG-21 REL field on the right to use the authored contents is also in progress.

However, despite standardization work in the fields of MPEG-21 IPMP and MPEG-21 REL, the development of technology for protecting and managing digital content and copyright in the broadcasting and communication convergence framework environment is still possible. There was a problem that was not made.

The present invention has been proposed to solve the above problems, the MPEG-21 standard based broadcasting and communication convergence framework (MPEG-21 multimedia framework) environment containing the authority and distribution information of the content requested by the consumer in the MPEG-21 multimedia framework environment A metadata authoring system and a method for protecting content by interworking REL-21 (REL: Rights Expression Language) and MPEG-21 IPMP (IPMP: Intellectual Property Management and Protection) for the protection and management of the content The purpose is to provide.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

An apparatus of the present invention for achieving the above object is a metadata authoring system for content protection, comprising: network interface means for receiving an MPEG-21 AL document from an external license server; Metadata generating means for generating protection management metadata by combining the MPEG-21 LP document and the MPEG-21 IPMP generated using the MPEG-21 LP document; Parse to obtain media content information from the MPEG-21 AL document, receive a file path of the parsed digital item, and use the MPEG-21 EL document and the protection management metadata to first and second Integrated control management means for obtaining password setting information, respectively; And digital item encryption means for inserting and applying a watermark to content and encrypting the protection management metadata in response to receiving a watermark and first and second encryption setting information from the integrated control management means.

On the other hand, the method of the present invention for achieving the above object, the content protection method in a metadata authoring system, the step of obtaining and parsing an MPEG-21 REL document; Identifying a file path of the parsed digital item (DI) and obtaining first cryptographic setting information to be applied to the digital item from the MPEG-21 REL document; Generating protection management metadata by combining the MPEG-21 REL document and IPMP metadata; Parsing the protection management metadata to obtain second cryptographic setting information to be applied to a digital item; And inserting and applying a watermark to content using the first and second cryptographic setting information and a watermark, and applying an encryption scheme to the protection management metadata.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention provides a link between an MPEG-21 IPMP technology for protecting and managing broadcast content (MPEG content) generated, delivered, and consumed in a broadcast, and an MPEG-21 REL technology for managing a license for a user's broadcast content. In addition, it provides a new broadcast content protection technology with improved interoperability according to the standard.

That is, a technology for protecting and managing broadcast content includes a license server for issuing a license for broadcast content, a tool server for managing and transmitting a tool necessary for a system, a personal computer-based content consuming terminal for actually consuming broadcast content, and It consists of a metadata authoring system (server), the invention relates to a metadata authoring system. In general, each component is referred to as a DRM system.

1 is a block diagram of an embodiment of a metadata authoring system for content protection according to the present invention.

As shown in FIG. 1, the metadata authoring system for content protection according to the present invention transmits / receives an external license server 300 and an MPEG-21 REL document, and transmits / receives various tools from the tool server 400. For example, a player, a software module or an executor such as a dynamic link library), and the MPEG-21 received from the license server 300 and the network interface unit 130 for transmitting / receiving messages with the content consuming terminal 500. Metadata for generating a single packaged protection management metadata (which is a DID document defined in the MPEG-21 standard) by combining the REL document with watermarking metadata information (MPEG-21 IPMP) of watermarked multimedia content. Providing a class and a function commonly used in the generation unit 110 and the metadata authoring system 100, and a message and file storage path generated between each internal module. It controls and manages data information such as and the like, parses an MPEG-21 REL document received from the license server 300 to obtain media content information for encryption, and receives a file path of a parsed digital item (DI). Integrated control management unit 120, the integrated control for obtaining the first and second password setting information to be applied to the digital item, respectively, using the protection management metadata received from the REL document and the metadata generator 110; The watermark is inserted into various multimedia contents (eg, audio, video, still image, text) by using the watermark and setting information of the encryption technique (watermark, encryption technique, and setting value) received from the management unit 120. And a digital item encryption unit 140 for applying and encrypting the protection management metadata (DID document) of the digital item DI.

In this case, the network interface unit 130 may include a license receiver 131 for receiving an MPEG-21 REL document from an external license server 300, and various tools (for example, a player and a dynamic connection library) from the tool server 400. Tool transmitter / receiver 132 for receiving various software modules or executors required by the same consumer, and digital item transmitter for exchanging various messages (eg, packaged digital items) with the content consumption terminal 500. 133.

Here, the received MPEG-21 REL document includes usage rights and distribution information of broadcast content requested by the consumer.

In addition, the metadata generator 110 uses the IPMP generator 111, the REL inserter 112, and the protection management metadata generator 113 therein from the license server 300 through the integrated control manager 120. Combine the received MPEG-21 REL document with IPMP metadata (ie, watermarking metadata information) generated as a result of applying watermarking after parsing multimedia content information described in the MPEG-21 REL document. Into one protection management metadata. Here, the IPMP generator 111 is delivered from the license server 300 and the multimedia content information described in the MPEG-21 REL document parsed by the integrated control manager 120 (consumption of broadcast content requested by the consumer). Receive authority and distribution information) and apply watermarking to generate IPMP metadata.

In this case, the protection management metadata is packaged into a DID document defined in the MPEG-21 standard. The protection management metadata includes all content itself information, distribution information, copyright usage information, and the like.

In addition, the integrated control manager 120 provides a class and a function commonly used in the entire system, that is, the metadata authoring system 100 using the state manager 122, and stores a message and a file path generated between each internal module. Control and manage data information such as

In addition, the integrated control manager 120 parses (translates) the MPEG-21 REL document received from the external license server 300 using the XML parsing module 121 to obtain media content information necessary for encryption. )do. The digital item encryption unit 140 receives first encryption setting information to be applied to the digital item by receiving the file path of the parsed digital item DI through the internal state manager 122 and grasped from the MPEG-21 REL document. To pass. The digital item encryption unit 140 parses metadata DID of the digital item DI generated by the metadata generator 110, that is, second encryption setting information to be applied to the digital item by parsing protection management metadata. To pass.

In addition, the digital item encryption unit 140 uses audio water, video, still image, and text using the watermark and setting information (watermark, encryption method, and setting value) transmitted from the integrated control manager 120. Insert and apply a watermark to various multimedia contents such as the above. The encryption function is applied to the metadata DID of the digital item DI, that is, the protection management metadata (DID document) generated by the metadata generator 110. Here, for example, various multimedia contents may be delivered through the user interface 200 and the integrated control manager 120.

On the other hand, when the integrated control management unit 120 receives the content to be newly registered through the user interface 200 from the user, whether the content is registered in the existing license server 300 registered from the license server 300 It receives the list and searches it to check whether it is illegal content, and notifies the user of illegal messages in case of illegality. If the content is legitimate to be newly registered, the license information, tool information, and digital item of the content author are selected, and the registration information of the data is received. Based on these values, the state manager 122 assigns a setting value of the access server. The setting value distinguishes the connection of the server in the transmitter / receiver and transmits the MPEG-21 REL document and tool in the waiting state. To be delivered to the integrated control management unit 120.

2 is a flowchart illustrating a content protection method in a metadata authoring system according to the present invention.

First, the network interface unit 130 receives an MPEG-21 REL document from an external license server 300 (201). The received MPEG-21 REL document is transmitted to the integrated control manager 120.

Thereafter, the integrated control manager 120 parses the received MPEG-21 REL document in order to obtain media content information necessary for encryption (202). The file path of the parsed digital item DI is checked (203), and the first encryption setting information to be applied to the digital item, which is identified from the MPEG-21 REL document, is transmitted to the digital item encryption unit 140 (204). The received MPEG-21 REL document is transmitted to the metadata generator 110.

Thereafter, the metadata generating unit 110 combines the MPEG-21 REL document with the watermarking metadata information (IPMP metadata) of the watermarked multimedia content to generate one packaged protection management metadata (DID document). (205). The generated protection management metadata is transmitted to the digital item encryption unit 140 through the integrated control manager 120. Accordingly, the watermarking operation of the multimedia content is performed by the digital item encryption unit 140 that receives the watermark from the integrated control manager 120.

Thereafter, the integrated control manager 120 parses the metadata DID of the digital item ID generated by the metadata generator 110, that is, the protection management metadata, to obtain second password setting information to be applied to the digital item. The digital item is transmitted to the encryption unit 140 (206).

Subsequently, the digital item encryption unit 140 inserts and applies a watermark to multimedia content using the first and second encryption setting information and the watermark received from the integrated control manager 120, and protects the metadata. The encryption technique is applied to the (DID document) (207). The metadata including the watermarked content and the protection management information are packaged and stored as digital items DI again.

Thereafter, the packaged digital item DI is provided to the outside through the integrated control manager 120 and the network interface 130.

As described above, the method of the present invention may be implemented as a program and stored in a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form. Since this process can be easily implemented by those skilled in the art will not be described in more detail.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

As described above, the present invention provides high-quality broadcasting contents through various types of terminals (personal computers, set-top boxes, mobile communication terminals, etc.) and various broadcasting and communication convergence networks (Internet, backbone, mobile IP, DMB, DVD, etc.). It is effective to provide.

That is, the present invention has the effect of efficiently protecting and managing digital content and copyright by interworking MPEG-21 REL and MPEG-21 IPMP developed as a standard.

Claims (6)

In the metadata authoring system for content protection, Network interface means for receiving an MPEG-21 AL document from an external license server; Metadata generating means for generating protection management metadata by combining the MPEG-21 LP document and the MPEG-21 IPMP generated using the MPEG-21 LP document; Parse to obtain media content information from the MPEG-21 AL document, receive a file path of the parsed digital item, and use the MPEG-21 EL document and the protection management metadata to first and second Integrated control management means for obtaining password setting information, respectively; And Digital item encryption means for inserting and applying a watermark to the content and encrypting the protection management metadata as the watermark and the first and second encryption setting information are received from the integrated control management means. Metadata authoring system for content protection, including. The method of claim 1, The integrated control management means, Providing a class and a function commonly used in the metadata authoring system, and performing a function of controlling and managing an internally generated message and a file storage path. The method according to claim 1 or 2, The metadata generating means, The metadata management system for content protection, characterized in that for packaging the protection management metadata in the DID (DID) document defined in the MPEG-21 standard. The method of claim 3, wherein The metadata generating means, Metadata authoring system for content protection, characterized in that for generating protection management metadata including the content itself information, distribution information, copyright usage information. The method of claim 3, wherein The metadata generating means, A metadata authoring system for content protection, characterized by generating protection management metadata for multimedia content transmitted / received through a broadcasting / communication convergence network. In the method of protecting content in a metadata authoring system, Obtaining and parsing an MPEG-21 REL document; Identifying a file path of the parsed digital item (DI) and obtaining first cryptographic setting information to be applied to the digital item from the MPEG-21 REL document; Generating protection management metadata by combining the MPEG-21 REL document and IPMP metadata; Parsing the protection management metadata to obtain second cryptographic setting information to be applied to a digital item; And Inserting and applying a watermark to content using the first and second encryption setting information and a watermark, and applying an encryption scheme to the protection management metadata; Content protection method in a metadata authoring system comprising a.

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