Video watermark embedding method and video watermark extracting method

A technology of watermark embedding and video watermarking, which is applied in the fields of digital video signal modification, image communication, selective content distribution, etc., to improve the accuracy, improve the ability to resist common editing processing, and achieve the effect of good universality.

Active Publication Date: 2014-01-22
INST OF AUTOMATION CHINESE ACAD OF SCI +1
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Problems solved by technology

[0006] The purpose of the present invention is to propose a video watermark embedding and extraction method with universality, good

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  • Video watermark embedding method and video watermark extracting method
  • Video watermark embedding method and video watermark extracting method
  • Video watermark embedding method and video watermark extracting method

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Embodiment Construction

[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0032] figure 1 A flow chart of the video watermark embedding and extraction method in the embodiment of the present invention is shown. Such as figure 1 As shown, its left half S1 shows the main flow chart of the video watermark embedding method, as figure 1 As shown, the embedding of the video watermark specifically includes:

[0033] Step S11: Preprocessing the original watermark sequence: mainly including adding flag bits, scrambling positions and repeating sequences.

[0034] Step S12: According to the encoding format of the original video, use a corresponding decoder to decode it, identify the I frame and obtain the data of the decoded I frame image; and save some parameters related to encoding during the video d...

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Abstract

The invention discloses a video watermark embedding method and a video watermark extracting method, wherein the video watermark embedding method comprises the steps as follows: magnifying at a small scale a selected video frame image requiring watermark embedding and conducting self-adaption segmentation processing on a macro block and a subblock; selecting a transformation coefficient and embedding a watermark based on singular value decomposition (SVD) of the subblock and discrete cosine transformation (DCT) of the macro block; reconstructing the video frame image through inverse discrete cosine transformation, inverse process of singular value decomposition and small-scale shrinkage of the image. The video watermark extracting method corresponds to the embedding method, and the watermark extracted from a video frame is subjected to a series of post-processing to obtain a final watermark sequence. The methods provided by the invention have good universality, the video frame for watermark embedding and the selection of the transformation coefficient improve the invisibility and the robustness of the watermark, and the watermark embedding and extracting efficiencies are improved while the attacks against transcoding, noises, frame insertion, frame deletion, resolution change and the like are resisted.

Description

technical field [0001] The invention belongs to the field of digital media content copyright protection, and specifically relates to a video watermark embedding and extraction method. The watermark embedded in the method has better invisibility and robustness, and the algorithm has good versatility and can Resists common editing processing attacks and can be applied to copyright protection of digital videos. Background technique [0002] In recent years, with the rapid development of Internet technology and digital media technology, there are a large number of digital media resources (images, videos, audios, documents, etc.) The content of media resources is copied, modified, disseminated and used. Therefore, the copyright protection of digital media content has attracted more and more attention from academia and business circles. In the process of solving this problem, adding watermark to digital media content is a widely used technical means. Digital watermarking technol...

Claims

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Application Information

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IPC IPC(8): H04N21/8358H04N19/467
Inventor 关虎曾智刘杰张树武
Owner INST OF AUTOMATION CHINESE ACAD OF SCI
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