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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

Inactive Publication Date: 2007-01-10
GK BRIDGE 1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, as a general structure that needs to be protected to be properly usable in the AVS-M file format, there is no specified detailed protection information

Method used

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  • Media file protection method
  • Media file protection method
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Embodiment Construction

[0029] Next, preferred embodiments of the present invention will be described with reference to the drawings.

[0030] figure 1 and figure 2 Indicates prior art.

[0031] figure 1 Indicates the structure of the general-purpose AVS-M file format at the highest level. The general nature of the ISO media form, is fully mounted by the AVS-M file. The AVS-M file is mainly composed of various boxes such as a file type box 101, a moving image box 102, and a media data box 104 including interlaced actual AVS-M video frames arranged in time order. The main brand indicator 105 in the form of an AVS-M file, must be "avsl". The actual AVS-M video track frame 103 must be included in the moving picture frame 102 . The handle type (handler_type) used by the AVS-M video track handler box (HandlerBox) 106 must be "vide"; the 4-character code of the sample description of the AVS-M video track must be "avsm". exist figure 1 The media content contained in the AVS-M file format shown is i...

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PUM

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/00G06F21/10G06F21/60H04L9/08H04N7/167H04N21/2347H04N21/235H04N21/266
Inventor 黄仲阳申省梅上野孝文
Owner GK BRIDGE 1
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