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General video digital watermark method

A digital watermarking and watermarking technology, applied in TV, color TV, image communication, etc., can solve the problems of no system design to provide a feasible general solution, high embedding ratio, and models that cannot be directly copied and used, etc., to achieve enhanced resistance to frame editing The ability to attack, the effect of low embedding ratio and small number of extractions

Inactive Publication Date: 2012-08-15
SHANDONG COMP SCI CENTNAT SUPERCOMP CENT IN JINAN
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Problems solved by technology

[0006] At present, there are not many researches on general model methods for video digital watermarking. With the development of digital video technology, the research of video digital watermarking is becoming more and more important. Although image digital watermarking and video digital watermarking have similarities, for image The watermarking model still cannot be used directly, and it is necessary to study the model that can guide the design and practical application of video digital watermarking system
Although there are some studies on video watermarking at present, they are basically aimed at realizing a certain algorithm, and there is no practical and general solution for system design in this field.
The existing method to solve the robustness of video digital watermarking is to divide the watermark into several parts and add index information or synchronization information to embed a large number of them repeatedly. Even if some frames are selected for embedding in this method, the embedding ratio is relatively high, and only The detection process can only be ended after all sub-parts of the watermark are detected, and there are inherent deficiencies in time and effect

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Embodiment Construction

[0048] Combine below figure 1, Figure 2 and image 3 The method steps of system design scheme analysis, watermark embedding and watermark extraction in a general video digital watermarking method of the present invention are described.

[0049] Such as Figure 1 and Figure 2 The system design scheme analysis and watermark embedding flow chart shown in the figure, the specific steps are as follows:

[0050] (1) Determine the system function: according to the actual application environment of the video file, comprehensively analyze the characteristics that the watermarked file should have, such as which attacks can be resisted, and the possibility of various attacks.

[0051] (2) According to the system requirements, select or write the best algorithm A that can resist the attacks listed in (1) 1 、A 2 ,...,A m , a total of m types (m≥2); and according to the probability of each attack to determine its embedding ratio k 1 、k 2 ,...,k m . For an attack with a high pr...

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Abstract

The invention discloses a general video digital watermark method mainly comprising analysis, embedding and extraction processes of a system design scheme. The analysis of the system design scheme comprises determination of a system function, watermark algorithms Ai to be embedded, embedding proportions of all algorithms and minimum extraction frame number Fmin; the watermark embedding process comprises frame distribution of a video file, watermark information pre-processing, embedding of watermark algorithms and formation of video files containing watermarks, wherein the embedding of watermark algorithms comprises the steps of: calculating embedding frame numbers, selecting embedding frames and embedding the watermark; and the watermark extracting process comprises frame distribution of the video file, selection of video frames to be detected, extraction of watermark information and calculation similarity. In the invention, the plurality of watermark algorithms are embedded at the same time and the embedding proportions can be selected, thereby the watermark method obviously enhances attack-resistant property; the watermark embedding ensures the appreciation and the embedding speed of the video file by using a non-frame-by-frame embedding way; in the watermark extracting process, the number of the detecting frames is less and the detection efficiency is improved; in addition, the general video digital watermark method also intensifies the capability of resisting frame edition.

Description

technical field [0001] The present invention relates to a general video digital watermarking method, more specifically, especially to a method that can flexibly select two or more algorithms to embed watermarks at random, and the method can accurately Extract watermark information and can significantly improve the performance of the design system. Background technique [0002] With the development of digital technology and the Internet, the publication and dissemination of multimedia digital works (images, video, audio, etc.) has become easier and faster, and its copyright protection has become an urgent problem to be solved. Since digital watermarking is an effective way to realize copyright protection, it has become a hot spot in the field of multimedia information security research, and it is also an important branch of information hiding technology research field. [0003] Theoretical model research is also an important part of the basic research of digital watermarking...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/913G06T1/00
Inventor 郑晓势赵彦玲刘广起李娜廖卢方丁元玉
Owner SHANDONG COMP SCI CENTNAT SUPERCOMP CENT IN JINAN
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