Method and system for embedding and extracting watermark in video

A video watermark and watermark technology, applied in the computer field, can solve problems such as video quality degradation
CN103634699AInactive Publication Date: 2014-03-12TSINGHUA UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2014-03-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for embedding a watermark in a video. The method comprises the following steps of extracting more than one video frame from the video, and performing the following treatment on each extracted video frame X, wherein the treatment comprises the steps of performing singular value decomposition X=UsigmaVT to obtain a singular value matrix sigma=diag(sigma 1, sigma 2,ellipsis sigma n), wherein U and V are two unitary matrixes; grouping the singular values sigma 1, sigma 2, ellipsis sigma n in the singular value matrix; performing quantitative index modulation on the grouped singular values to obtain a singular value matrix sigma` embedded with the watermark; performing singular value decomposition inverse process X`=Usigma`VT on the singular value matrix sigma` embedded with the water mark to obtain a video frame X` embedded with the water mark; processing the more than one video frame to obtain more than one video frame X` and combining into the video embedded with the water mark. The method for embedding the watermark enables the video embedded with the watermark to achieve better video quality.
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Description

technical field

[0001] The invention belongs to the field of computers, in particular to a method and system for embedding and extracting video watermarks. Background technique

[0002] With the development of computer technology, digital video has brought great convenience to human life. Digital TV, high-definition TV, DVD and online video allow people to easily obtain the video content they are interested in. At the same time, it also brings The issue of video copyright content protection, due to the reproducibility of digital video, pirated video has become very easy, how to effectively copyright protection of video content has become an important issue. In recent years, emerging video watermarking technology embeds watermark information in the video, which can realize the copyright protection of the video content. For example, if the copyright information is hidden in the video, after the video has undergone operations such as dissemination and distribution, the copyrig...

Claims

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