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Video media watermark protection method

A video and media technology, applied in the field of multimedia signal processing, can solve the problems of complex encoding and decoding calculation, and achieve the effect of high imperceptibility, good versatility and easy implementation.

Inactive Publication Date: 2012-07-04
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the existing watermark embedding method that requires complex codec calculations, and provide a simple and convenient watermark protection method for video media

Method used

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  • Video media watermark protection method

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Embodiment Construction

[0037] Concrete operation of the present invention is divided into two processes of watermark embedding and video authentication, and embedding process is as follows:

[0038] 1) Read the code stream information of a certain size, find the bit rate identifier (bit rate, 18bits) in the code stream, and find the representation information of the bit rate;

[0039] 2) The lowest 2 bits of the 18-bit information are selected for modification, and the information to be embedded is directly modified. For example, "0" is set when "0" is embedded, and "1" is set when "1" is embedded;

[0040] 3) Return to step 1 and search for the next identifier until the watermark information is embedded.

[0041] The video watermark extraction steps are as follows:

[0042] 1) Use the same size window to read the code stream and find the bit rate identifier (bit rate);

[0043] 2) Determine whether the extracted watermark information is "1" or "0" according to the lowest two bits of 18 bits;

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Abstract

The invention provides a video media watermark protection method and belongs to the field of multimedia signal processing. By modifying a frame structure of the video media, the watermark data is embedded into each frame respectively, and watermark embedding is implemented by directly modifying the control information of the video media. The method has the advantages of: 1) simple principle, easyimplementation, direct operation on code streams, and strong practicality; 2) no need of encoding / decoding process during embedding, no influence of watermark information on the video substantially, and high imperceptible property; and 3) good universality, and capacity of embedding the watermark by only knowing the format of the code streams and finding a proper embedding position.

Description

technical field [0001] The invention belongs to the field of multimedia signal processing, in particular to a watermark method for protecting video media. Background technique [0002] In the past ten years, digital multimedia has gradually penetrated into people's daily life. Among various multimedia information, digital video occupies a very important position. With the rapid development of multimedia processing technology and the Internet, it is more convenient for people to obtain video, but there are many problems such as copyright disputes, illegal transmission and so on. Therefore, video watermarking technology has become an important research topic in the field of information security. [0003] Watermarking technology can embed user information, copyright information, etc. into video files without affecting video quality, and can be used for identification of work ownership and tracking illegal users. With the advent of the Internet age, online transactions have b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00H04N5/14
Inventor 李煌刘红梅黄继武
Owner SUN YAT SEN UNIV
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