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A Method of Embedding and Extracting Video Watermark

A technology of watermark embedding and video watermarking, which is applied in digital video signal modification, image communication, selective content distribution, etc., to improve the ability of noise and other attacks, improve versatility and security, and achieve the effect of good universality.

Inactive Publication Date: 2016-08-17
INST OF AUTOMATION CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 invisibility, strong robustness and high efficiency, which is used to solve the copyright protection problem of digital video content

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  • A Method of Embedding and Extracting Video Watermark
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  • A Method of Embedding and Extracting Video Watermark

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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 and extraction method. Wherein the watermark embedding method includes: for the selected video frame image for watermark embedding, perform small-scale enlargement as required and perform adaptive segmentation processing of macroblocks and sub-blocks; based on the singular value decomposition SVD of the sub-blocks and based on the The discrete cosine transform DCT of the macroblock selects the transform coefficient and embeds the watermark; reconstructs the video frame image through the inverse discrete cosine transform, the inverse process of singular value decomposition, and small-scale image reduction. The video watermark extraction method corresponds to the embedding method, and the watermark extracted from the video frame needs to undergo a series of post-processing to obtain the final watermark sequence. The invention has good universality, and the selection of the video frame and its transformation coefficient used for watermark embedding improves the invisibility and robustness of the watermark, and is resistant to transcoding, noise, frame insertion, frame deletion, resolution While changing and other attacks, the efficiency of watermark embedding and extraction is improved.

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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Patent Type & Authority Patents(China)
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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