KR20050066482A - Authoring apparatus and method for protection of object based contents and rights - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to an authoring apparatus for object-based content and copyright protection.

2. The technical problem to be solved by the invention

An object of the present invention is to provide an authoring apparatus (MPEG-4 IPMP authoring tool) for allowing an MPEG-4 content author to more easily and conveniently produce object-based broadcasting content protected according to the MPEG-4 standard.

3. Summary of the Solution of the Invention

In the authoring apparatus for object-based content and copyright protection, the present invention provides a form-based interface for authors to edit content and copyright protection (hereinafter referred to as "IPMP") information, and provides control and control for each module. IPMP author interfacing means for receiving XMT (eXtensible MPEG-4 Textual format) information and storing it in an IPMP data structure; An IPMP information processing means for parsing an XMT document based on XML (Extensible Markup Language) and constructing an IPMP information element according to an XMT structure, and generating, modifying, and deleting the IPMP information; IPMP media processing means for processing watermarking and encryption on media data according to a function of each IPMP tool that performs a watermarking or encryption function; And converting the IP format XMP, which is a text format, to an IPMPized MP4 file, which is a binary format, or converting the IP format MP4 file, which is a binary format, to an IPMP format, XMT, to facilitate content editing and modification. Includes IPMPized MP4 conversion means.

4. Important uses of the invention

The present invention is used in digital broadcasting services.

Description

Authoring apparatus and method for protection of object based contents and rights}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of digital content protection management (DRM) technology, and in particular, to protect object-based MPEG-4 (MPEG-4) digital content to be used as multimedia content in set-top boxes and broadcasting terminals. 4 relates to an authoring device for editing and storing content and copyright information in accordance with the Intellectual Property Management & Protection (IPMP) standard.

In general, digital rights management (DRM) technology is a function that protects and manages the rights of digital content creators, and generally stores the content in an encrypted form in a content providing server and responds to a user's purchase request. A method of delivering encrypted content and key information (hereinafter referred to as a "license") to a user.

The most commonly used system for protecting broadcast content is a CAS system. The CAS scrambles content on the broadcast server side, and descrambles using a smart card in the terminal so that only the subscriber can receive a channel.

The broadcast environment provides high-quality digital content as a broadcast service due to the convenience of diffusion of digital devices, cost reduction, and maintenance in the conventional analog broadcasting service. In particular, the value added of the multimedia content service in the recent complex mobile environment is quite high. However, it is difficult to provide an interactive service according to a user's taste in the form of existing multimedia contents. As such, it is highly likely that object-based MPEG-4 contents with high compression ratios that are interactive according to user's taste will be used as digital contents for mobile phones and PDAs.

Since MPEG-4 content is digital content, there is no difference between the original and the copy, unlike the content of the existing analog signal, and the image quality of the original is maintained even after copying or playing several times. MPEG-4 content, which has the characteristics of digital content, provides a service according to the user's taste (called "interactive function"), so that high quality MPEG-4 content is frequently exchanged between content owners and consumers. Have. However, from the viewpoint of the MPEG-4 contents copyright holder, it is difficult to deliver MPEG-4 contents to consumers without any mind. Therefore, there is a need for a method of inserting copyright information such as watermarking into MPEG-4 content or easily inserting, editing, and storing copyright information into MPEG-4 file.

In summary, since MPEG-4 content can be manipulated on a per object basis, it is not only useful for compositing multiple objects into one, conversely disassembling them, but also for producing content according to a user's needs. As such, the application scope can be used in various fields such as mobile, computer, internet streaming, communication, and broadcasting. However, although the user's interactive function is excellent, there is a high possibility that the copyright and privacy of the content creator and the copyright holder are violated in the process of exchanging contents. Therefore, there is a need to manage the contents to be used and distributed according to the usage rights, and a protection system that blocks the access of illegal users is required. In accordance with such requirements, object-based broadcasting contents protected according to the MPEG-4 standard are required. Authoring tools that can be produced easily and conveniently are urgently needed.

The present invention has been proposed in response to the above-described demands, and an authoring apparatus for allowing MPEG-4 content authors to more easily and conveniently produce object-based broadcasting contents protected to the MPEG-4 standard. 4 IPMP authoring tool).

The present invention for achieving the above object, in the authoring device for object-based content and copyright protection, provides a form-based interface for authors to edit content and copyright protection (hereinafter referred to as "IPMP") information, IPMP author interfacing means for receiving control and XMT (eXtensible MPEG-4 Textual format) information for each module and storing them in an IPMP data structure; An IPMP information processing means for parsing an XMT document based on XML (Extensible Markup Language) and constructing an IPMP information element according to an XMT structure, and generating, modifying, and deleting the IPMP information; IPMP media processing means for processing watermarking and encryption on media data according to a function of each IPMP tool that performs a watermarking or encryption function; And converting the IP format XMP, which is a text format, to an IPMPized MP4 file, which is a binary format, or converting the IP format MP4 file, which is a binary format, to an IPMP format, XMT, to facilitate content editing and modification. It characterized in that it comprises an IPMP MP4 conversion means.

The MPEG-4 content and copyright protection authoring apparatus (MPEG-4 IPMP authoring tool) according to the present invention provides an author friendly user interface and is an IPMPed eXtensible MPEG-4 which is a text format that is easy to edit and modify. Create a textual format file. You can also create IPMPized MP4 files in binary format for efficient content transfer and storage.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an embodiment of an authoring apparatus for object-based content and copyright protection according to the present invention.

As shown in FIG. 1, the authoring apparatus for object-based content and copyright protection (MPEG-4 IPMP authoring tool) according to the present invention is a form-based apparatus for authors to edit content and copyright protection information (ie, IPMP information). IPMP authoring user interface unit 10, which provides control of each module, receives eXtensible MPEG-4 Textual format (XMT) information, and stores them in an IPMP data structure, and an XMT document based on Extensible Markup Language (XML). Parsing and constructing an IPMP information element according to the XMT structure, and based on it, an IPMP information processing unit 20 for generating, modifying, and deleting IPMP information, and each IPMP tool 50 performing a watermarking or encryption function. IPMP media processing unit 30 for watermarking and encrypting the media data according to the function of XMP, and XMP, which is a text format, for transferring and storing content, An IPMPized MP4 conversion unit 40 for converting an MPMP file in binary format into an IPMPized XMT in text format to convert the file into an MP4 file or to easily edit and modify contents is included.

An object-based content and copyright authoring apparatus (MPEG-4 IPMP authoring tool) according to the present invention may be used to provide a broadcast authoring server for digital broadcast content and an additional data service for broadcast content. In particular, the MPEG-4 content transmitted due to the user-interactive characteristics and the high compression ratio of the MPEG-4 can be utilized in mobile phones, PDAs, and the like in a mobile environment.

In the present invention, the IPMP tool list allows to select or verify the list of IPMP tools 50 required to protect and manage MPEG-4 content. In addition, the IPMP descriptor that controls the IPMP control describes the IPMP tool 50 or the information that is actually required to control the management and protection scheme for the MPEG-4 contents. XMT, which is used to express MPEG-4 digital contents, is a text-based document that is easily and conveniently edited and edited by the author, and represents an expression format described in XML for the MP4 file format, which is a binary format.

Then, the respective components of the authoring apparatus (MPEG-4 IPMP authoring tool) for object-based content and copyright protection will be described in more detail.

The IPMP authoring user interface unit 10 provides a form-based Graphical User Interface (GUI) 11 as shown in FIG. 2 to easily and conveniently use the IPMP authoring function. Is What You Get) and a control and storage module 12 for efficiently processing IPMP information.

Specifically, as illustrated in FIG. 2, the IPMP authoring user interface unit 10 is provided to select, insert, or edit IPMP information according to an MPEG-4 IPMP configuration class, and select content or an object to select IPMP information. Form-based graphical user interface (GUI) module 11 for easy authoring, and the inputted information is stored according to the IPMP configuration class structure, and then a list of relevant IPMP information is provided for selection and input. In addition, the stored data is transmitted to the IPMP information processing unit 20, a text file (that is, IPMPized XMT information), which is an intermediate file, is returned, stored in an IPMP data structure, edited through a form, and an IPMP tool selected. And a control and storage module 12 having a function of automatically controlling the IPMP media processing unit 30 to insert the IPMP function and return the result.

The GUI module 11 provides a form according to the MPEG-4 IPMP configuration class so that the user can input IPMP information such as an IPMP tool list, an IPMP descriptor, and an IPMP descriptor pointer. The user interface is provided to select, insert or edit, and configures a user interface to select content or an object (video, audio, image) to input IPMP information such as watermarking information.

The control and storage module 12 is designed to store the inputted information according to the IPMP configuration class structure, and then provide a list of relevant IPMP information for selection. Then, the stored data is controlled to be transmitted to the IPMP information processing unit 20, and a text file (that is, IPMPed (IPMPized) XMT information), which is an intermediate file, is returned and stored in the IPMP data structure, and then edited through a form. In addition, when the IPMP tool (IPMP tool) is selected, the IPMP media processor 30 automatically inserts the IPMP function and controls to return the result.

Meanwhile, as illustrated in FIG. 3, the IPMP information processing unit 20 uses an XML parser 22 for parsing an XML-based IPMPed XMT document and an IPMP information element 231 according to the XMT structure. It consists of an IPMPized XMT generator 23 that constitutes.

Specifically, as shown in FIG. 3, the IPMP information processing unit 20 generates an XMT dome structure to use the IPMP information of the IPMP authoring user interface unit 10 in the IPMPized XMT generator 23. After analyzing the location to be added, search and extract the IPMP information from the IPMPized XMT document, and then send it to the IPMP authoring user interface unit 10 and the IPMP tool list according to the user's IPMP information. An IPMPized XMT generator that constructs elements and substructures of an IPMP tool list descriptor, an IPMP descriptor, and an IPMP descriptor pointer through a dome to conform to the IPMPized XMT class structure. 23).

The IPMPized XMT parser 22 analyzes the location to be added after generating the XMT DOM structure to use the IPMP information of the IPMP authoring user interface unit 10 in the IPMPized XMT generator 23, and analyzes the IPMP in the IPMPized XMT document. After searching for and extracting the information, the information is transmitted to the IPMP authoring user interface unit 10.

The IPMPized XMT generator 23 configures elements and substructures, such as an IPMP tool list descriptor, an IPMP descriptor, and an IPMP descriptor pointer, in accordance with the user's IPMP information to fit the IPMPized XMT class structure through the DOM.

The IPMPized XMT manager 232 analyzes the IPMP information of the stored document, and if it does not exist, creates a superstructure such as toolListDescr, ipmpDesc, and ipmpDescrPtr. .

Meanwhile, as illustrated in FIG. 4, the IPMP media processing unit 30 provides an IPMP tool interface module 33 provided to enable standard input and output according to the functions and characteristics of the IPMP tool, such as a watermarking or encryption tool. A media buffer 32 for processing the media and a standard control module 31 for controlling the interface are provided.

Specifically, as shown in FIG. 4, the IPMP media processing unit 30 connects various input parameters or return values of outputs in a standardized input / output form, and connects each of the IPMP tools as an access device for an additional IPMP tool. An IPMP tool interface module 33 in the form of an extension module for processing input and output, a media buffer (video buffer, audio buffer, image buffer, etc.) 32 for loading a media object into memory for processing according to the IPMP tool, It includes a standard control module 31 for applying the functions of the IPMP tool to the media buffer 32 through the standard input and output of the IPMP tool interface module 33 to initialize and create media objects through the tool.

The IPMP tool interface module 33 includes a connection device for connecting various input parameters or return values of the output in a standardized input / output form. The access device for the additional IPMP tool is processed through an extension module for processing each input and output.

The media buffer 32 serves to load media objects such as video, audio, and images into memory for processing according to the IPMP tool.

The standard control module 31 applies the functions of the IPMP tool such as watermarking and encryption to the media buffer 32 through the standard input / output of the IPMP tool interface module 33 to generate a media object. Processed when initializing content.

Meanwhile, the IPMPed MP4 converter 40 converts media related to XMT into a stream format in an encoder analyzing IPMP information, and performs MP4 binary description in which IPMP information is described through a multiplexing process including IPMP information. An IPMPized MP4 file generator for generating files (see FIG. 5A) and an IPMPized XMT parser (see FIG. 5B) for converting IPMPized MP4 to IPMPized XMT for re-editing the IPMPized MPEG-4 content. .

As shown in FIG. 5A, the IPMPized MP4 file generator is configured to process a media related to XMT in an encoder that analyzes IPMP information. for scene (MPS) stream and multiplexing process including IPMP information to generate MP4 binary file describing IPMP information.

In addition, as shown in FIG. 5B, the IPMPized MP4 parser converts the IPMPized MP4 file into IPMPized XMT to modify or re-edit MPEG-4 content.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

The present invention as described above, in the mobile broadcasting environment for mobile phones and PDAs and MPEG-4 additional data services, the reuse of illegal users through the easy insertion / editing / storage of copyright information and copyright of MPEG-4 digital content By controlling, it is possible to prevent reuse of illegal content distribution and storage, thereby protecting the interests and rights of the author and the producer.

1 is a block diagram of an embodiment of an authoring apparatus for object-based content and copyright protection according to the present invention.

Figure 2 is a detailed configuration diagram of an embodiment of the IPMP authoring interface of Figure 1 according to the present invention.

3 is a detailed configuration diagram of an embodiment of the IPMP information processing unit of FIG. 1 according to the present invention;

4 is a detailed configuration diagram of an embodiment of the IPMP media processing unit of FIG. 1 according to the present invention;

FIG. 5A is a diagram illustrating an embodiment of an IPMPized MP4 file generator of the IPMPized MP4 converter of FIG. 1 according to the present invention; FIG.

FIG. 5B is an explanatory diagram illustrating an IPMPized XMT parser of the IPMPized MP4 conversion unit of FIG. 1 according to the present invention; FIG.

* Explanation of symbols on the main parts of the drawing

10: IPMP authoring user interface 20: IPMP information processing unit

30: IPMP media processing unit 40: IPMPized MP4 conversion unit

50: IPMP Tool

Claims (7)

In the authoring device for object-based content and copyright protection, Provides a form-based interface for authors to edit content and copyright protection (hereinafter referred to as "IPMP") information, receives control and controls for each module, and receives eXtensible MPEG-4 Textual format (XMT) information and stores it in an IPMP data structure. IPMP author interfacing means; An IPMP information processing means for parsing an XMT document based on XML (Extensible Markup Language) and constructing an IPMP information element according to an XMT structure, and generating, modifying, and deleting the IPMP information; IPMP media processing means for processing watermarking and encryption on media data according to a function of each IPMP tool that performs a watermarking or encryption function; And IPMP for converting text format IPMPized XMT to binary format IPMPized MP4 file for content transfer and storage, or converting IPMP format MP4 file in binary format to IPMP format XMT text format for easy content editing and modification. MP4 Converter Authoring device for object-based content and copyright protection comprising a. The method of claim 1, The object-based content, Authoring apparatus for object-based content and copyright protection, characterized in that the MPEG-4 digital broadcast content. The method according to claim 1 or 2, The IPMP author interfacing means, A form-based graphical user interface (GUI) module provided to select, insert, or edit IPMP information according to an MPEG-4 IPMP configuration class, and to easily create IPMP information by selecting content or an object; And After the inputted information is stored according to the IPMP configuration class structure, a list of relevant IPMP information is provided for selection and input, and the stored data is transmitted to the IPMP information processing means, and a text file (that is, an intermediate generated file) IPMPized XMT information), stored in an IPMP data structure, edited through a form, and when the IPMP tool is selected, the IPMP media processing means automatically inserts an IPMP function and returns a result. Control and storage module Authoring device for object-based content and copyright protection comprising a. The method according to claim 1 or 2, The IPMP information processing means, After generating an XMT dome (DOM) structure to use the IPMP information of the IPMP authoring interfacing means in the IPMPized XMT generator, analyze the location to be added, search for and extract the IPMP information from the IPMPized XMT document, and then the IPMP authoring interfacing means An IPMPized XMT parser for transmitting to the network; And According to the user's IPMP information, the elements and substructures of the IPMP tool list descriptor, the IPMP descriptor, and the IPMP descriptor pointer correspond to the IPMPized XMT class structure. Configure the IPMPized XMT Generator via Authoring device for object-based content and copyright protection comprising a. The method of claim 4, wherein The IPMPized XMT generator, IPMPized XMT manager that analyzes IPMP information of stored documents and creates a superstructure of toolListDescr, ipmpDesc, ipmpDescrPtr if it does not exist, and adds elements configured according to the structure if it exists. Authoring device for object-based content and copyright protection comprising a. The method according to claim 1 or 2, The IPMP media processing means, An IPMP tool interface module in the form of an extension module for connecting input values of various input parameters or outputs in a standardized input / output form and for processing input / output of each of the IPMP tools as a connection device for an additional IPMP tool; A media buffer that loads the media object into memory for processing according to the IPMP tool; And Standard control module which applies the function of IPMP tool to the media buffer through standard input / output of the IPMP tool interface module, and initializes and creates media objects through this tool. Authoring device for object-based content and copyright protection comprising a. The method according to claim 1 or 2, The IPMPized MP4 conversion means, An IPMPized MP4 file generator for converting media related to XMT into a stream format in an encoder for analyzing IPMP information, and generating an MP4 binary file describing IPMP information through a multiplexing process including IPMP information; And IPMPized XMT parser to convert IPMPized MP4 to IPMPized XMT for re-editing IPMPized MPEG-4 content Authoring device for object-based content and copyright protection comprising a.