H.264/AVC compressed-domain video watermark embedding and extracting method

A technology of video watermarking and compression domain, which is applied in digital video signal modification, electrical components, image communication, etc. It can solve the problems of not considering the characteristics of video frames, etc., so as to improve the robustness and invisibility of watermarking and reduce the computational complexity , high real-time effect

Active Publication Date: 2015-04-22
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST +1
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Problems solved by technology

This method has better robustness and invisibility, but does not consider the characteristics of the video frame itself

Method used

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  • H.264/AVC compressed-domain video watermark embedding and extracting method
  • H.264/AVC compressed-domain video watermark embedding and extracting method
  • H.264/AVC compressed-domain video watermark embedding and extracting method

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Embodiment Construction

[0040]The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0041] Such as figure 1 As shown, the video watermark embedding steps of this embodiment are as follows:

[0042] Step 1, binarize the N×N watermark image W to produce matrix W N×N , the binary watermark information w is obtained through Arnold transformation, and the number of transformations is m. The steps of an Arnold transformation are as follows:

[0043] i'=(i+j)mod N

[0044] j'=(i+2i)mod N

[0045] In the formula, i, j is the matrix W N×N Element subscripts, i', j' are the new subscripts of the matrix after Arnold transformation, i, j=0,1,...,N-1, mod is the remainder.

[0046] Step 2, utilize the H.2...

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Abstract

The invention discloses an H.264 / AVC compressed-domain video watermark embedding and extracting method. Binaryzation is conducted on watermark images, and binary watermark information is obtained through Arnold transformation; compressed encoding is conducted on original video by using an H.264 / AVC encoder, 16 4*4 luminance blocks of each macro block are extracted out according to the H.264 / AVC video encoding standard, and integer discrete cosine transformation is conducted on each 4*4 luminance block; according to the coefficient of each 4*4 luminance block obtained after integer discrete cosine transformation, each 4*4 luminance block is divided into a texture block body and a non-texture block body; according to the binary watermark information, the local energy difference of each macro block is modulated; entropy encoding is conducted on the 4*4 luminance blocks obtained after binary watermarks are embedded to obtain video streaming with the watermarks. According to the H.264 / AVC compressed-domain video watermark embedding and extracting method, video information (texture and energy) is fully considered, and the robustness and invisibility of the watermarks are improved; operational complexity is low, no complex parameter choice exists, and higher real-time performance is achieved; the original video is not needed in the watermark extraction, and the H.264 / AVC compressed-domain video watermark embedding and extracting method belongs to a blind watermarking method.

Description

technical field [0001] The invention relates to a video compression domain digital watermark, in particular to a H.264 / AVC compression domain video watermark embedding and extraction method. Background technique [0002] Video digital watermarking technology is one of the key technologies of multimedia information security and an important branch of information hiding technology research field. The introduction of a large number of consumer digital video products has made the market demand for digital product property right protection technology with digital watermarking as an important component more urgent. With the large-scale construction of digital and networked video surveillance systems, how to protect surveillance information from tampering, leakage, and counterfeiting makes video digital watermarking a research hotspot in the field of public security. [0003] H.264 / AVC is a new generation of video compression coding standard formulated by ISO / IEC and ITU-T. It has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/467H04N19/625
Inventor 张伟王啟军甘彤李武劲
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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