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Video frequency data copying control system and method

A technology of video data and copy control, applied to TV system components, image data processing, image data processing, etc., can solve the problems of undetectable information re-dissemination and content changes

Inactive Publication Date: 2004-07-14
TIANJIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

First of all, the encryption method is only used in the communication channel. Once it is decrypted, the information will completely become plaintext; in addition, the integrity authentication in cryptography is realized through digital signatures, which are not directly embedded in multimedia information. Therefore, it is impossible to detect the redistribution of information and the change of content after passing through the encryption system

Method used

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  • Video frequency data copying control system and method
  • Video frequency data copying control system and method
  • Video frequency data copying control system and method

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Embodiment Construction

[0027] In view of the application characteristics of digital watermarking technology in the copyright protection of video products, the DHSG group put forward some system suggestions and corresponding technical requirements in summary, and gave watermark information embedding, basic playback control and basic recording control in the video watermarking system And the basic flow of a copy control. figure 1 It shows the process of embedding watermark in video data. Firstly, watermark is embedded in video source, and specific information is loaded into video data to prove the legitimacy of video digital products. Then compress the video data embedded with the watermark, and then embed a watermark to prevent the video data from being illegally copied in the compressed video data. The video data stream embedded with the two watermarks is provided to the production equipment through physical or electronic transmission to make a video digital product. During the playback process, th...

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Abstract

This invention relates to a video data duplication control system including a video compound water-mark inserting system for inserting a fixed and a variable water marks into a video signal source, a pick-up and detection system for detecting fixed and variable water-mark information inserted in video data to determine the source allowance duplication state, a modification system for modifying variable water-mark information. The method includes detecting variable water-mark information to determine its allowance duplication state and to modify variable water-mark information when it expresses it can duplicate the video data to register the data and modified information on media.

Description

technical field [0001] The invention relates to a video data duplication control system and method, in particular to a video data duplication control system and method for adding fixed watermarks and variable watermarks to video data to prevent illegal duplication of video data. Background technique [0002] With the rapid development of information technology and computer network, the storage, copying and dissemination of digital information (image, text, audio, video) has become very convenient. People can not only obtain multimedia information conveniently and quickly through the Internet and CD-ROM, but also obtain copies that are exactly the same as the original data. But the resulting piracy and copyright disputes have become increasingly serious social problems. [0003] Traditional encryption methods also have certain limitations on the protection and integrity authentication of multimedia content. First of all, the encryption method is only used in the communicati...

Claims

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Application Information

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IPC IPC(8): G06T1/00H04N1/387H04N5/913
Inventor 苏育挺田玉静张春田朱长峰李坤
Owner TIANJIN UNIV
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