AVS optical disk duplication control method based on digital watermarking

A technology of copy control and digital watermarking, which is applied in data recording, color TV parts, TV system parts, etc., to achieve the effect of improving detection accuracy, improving subjective quality and peak signal-to-noise ratio, and increasing the amount of watermark embedding

Inactive Publication Date: 2008-08-20
TIANJIN UNIV
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Problems solved by technology

However, the digital watermarking technology based on AVS is still in its infancy, so it is urgent...

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  • AVS optical disk duplication control method based on digital watermarking
  • AVS optical disk duplication control method based on digital watermarking
  • AVS optical disk duplication control method based on digital watermarking

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Embodiment Construction

[0048] The digital watermark-based copying control method for AVS optical discs of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0049] Such as figure 1 Shown, the AVS disc duplication control method based on digital watermark of the present invention includes following stages: (A) video source is embedded into fixed watermark and variable watermark by video watermark embedding system, and burning AVS disc; (B) Perform video watermark detection in the video watermark extraction and detection system to determine the reproducible status of video data; (C) modify variable watermark information in the variable watermark modification system; (D) copy and burn AVS discs.

[0050] Such as figure 2 As shown, the described embedding fixed watermark and variable watermark into the video watermark embedding system includes the following process: (A1) providing a video source, and the video source includes a sour...

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Abstract

The invention discloses an AVS optical disc copying control method based on digital watermark, comprising the steps of: (A) embedding a video source to a fixed watermark and a variable watermark by a video watermark embedding system, and recording an AVS optical disc; (B) testing the video watermark in a video watermark extracting testing system to decide the copyable state of video data; (C) rectifying the variable watermark information in a variable watermark rectifying system; and (D) copying the recorded AVS optical disc. According to the method, an image local activity factor according to visual characteristic of human eyes is introduced, and subjective quality and peak signal-to-noise of image are improved. As the embedding rate is increased, the bit rate of code stream is not changed, and the subjective quality of video is not affected. The testing accuracy of the watermark information is also improved. A variable watermark information embedder provides a code stream watermark embedding algorithm based on Golomb code word modulation, directed at AVC video standard, realizing integrity protection and copy control of video code stream information.

Description

technical field [0001] The invention relates to a copyright protection system for copy control of optical disc video data. In particular, it relates to a digital watermark-based AVS disc that adds fixed and variable watermarks to disc video data conforming to the AVS video standard (GB / T 20090.2), performs video data copyright protection and authentication, and prevents video data from being illegally copied Copy control method. Background technique [0002] The AVS video standard is a digital audio and video coding standard formulated by the Digital Audio and Video Codec Technology Standard Working Group (AVS Working Group), which provides technical support for the leapfrog development of audio and video industries such as digital TV and related chip industries. With the industrialization of AVS, the demand for digital copyright protection system for AVS is increasingly urgent. However, the digital watermarking technology based on AVS is still in its infancy, so it is urg...

Claims

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Application Information

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IPC IPC(8): G11B20/00H04N5/913
Inventor 苏育挺张春田宋星光
Owner TIANJIN UNIV
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