Media file protection method

A media file and file technology, applied in the direction of digital data protection, program/content distribution protection, electrical components, etc., can solve problems such as the absence of detailed protection information
CN1892668AInactive Publication Date: 2007-01-10GK BRIDGE 1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
GK BRIDGE 1
Publication Date
2007-01-10
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The method to signal DRM information in an AVS-M file is disclosed in the present invention. Following the general ISO base media file format box structure to achieve the interoperability and compatibility, the default encryption algorithm and related key management information in an IPMP descriptor is defined and carried in a required protection scheme box. The general IPMP signaling scheme through an IPIP tool ID declared by the IPMP descriptor as well is provided to achieve the flexibility in case the default protection scheme is broken or multiple DRM modules are desirable to protect such one video data. Rights data information to facilitate getting the actual usage rule for the content is also provided. The original content type of the media is kept in the new protected media form. Such file is useful to interchange, edit and playback for AVS-M video, especially for its IP protection.
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Description

technical field

[0001] The invention relates to the field of multimedia content protection. More specifically, the present invention relates to a notification method of protection information used in a media file (ie, an AVS-M file). Background technique

[0002] Along with the rapid and large-scale emergence of digital media resources, user demands for using digital content or wishing for easier access are increasing day by day. The file form is one of the most important content information packet means for sending digital media data (video, audio, image, text, graphics and other content generated by digital devices). The media file format generally conforming to the ISO standard (ISO / IEC 14496-12) is the standard format that most other media files conform to.

[0003] The AVS group is currently developing highly efficient, reliable and scalable audio / video coding algorithms and tools. One of the developed video standards is called "AVS-M", which is a standard for video ...

Claims

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