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Semantic information transmission and protection method based on H264

A semantic information, H264 technology, applied in the field of H264-based semantic information transmission and protection, can solve problems such as digital video information redundancy, positioning video, etc., to achieve the effect of solving bandwidth bottlenecks, ensuring robustness, and ensuring security

Active Publication Date: 2012-11-28
SOUTHWEAT UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

In the information space, URL (Uniform Resource Locator) does not locate the video according to the semantic information of the digital video at all, resulting in a large amount of information redundancy in the digital video.

Method used

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  • Semantic information transmission and protection method based on H264
  • Semantic information transmission and protection method based on H264
  • Semantic information transmission and protection method based on H264

Examples

Experimental program
Comparison scheme
Effect test

example

[0109] In this example, the reference software JM14.2 based on the H264 encoding standard is used for testing. The video sequence used in the test is mother-daughter and Akiyo in QCIF format (176×144). The length of the Carphone test sequence is 300 frames. The rate is 30HZ.

[0110] 1. Evaluation of imperceptibility of watermark

[0111] Imperceptibility is the most basic performance requirement of watermarking, which means that the watermark embedded in the digital video does not affect the use value of the original data, that is, the change of the digital video caused by the embedded watermark should be imperceptible to the user's visual system. Otherwise the watermark loses its value. Figure 7 , Figure 8 They are the comparisons before and after embedding the robust semantic watermark and the fragile watermark in the I and P frames of the Akiyo and mother-daughter sequences when the quantization parameter QP=28.

[0112] From the perspective of human subjectivity, the...

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Abstract

The invention discloses a semantic information transmission and protection method based on H264. The semantic information transmission and protection method comprises the following steps of: firstly, carrying out semantic information indexing on a digital video of an H264 standard to obtain n-dimensional semantic information and pre-treating the n-dimensional semantic information into n binary images; and taking the binary images as robust watermarks to be embedded into a middle-frequency coefficient of a DCT (Discrete Cosine Transformation) region of an I frame of the digital video of the H264 standard. A semantic watermark in the I frame has the better robustness so that the stability of semantic information transmission is guaranteed; and the semantic information transmission and protection method is good for various expanded applications of a user terminal and guarantees the safety and the integrity of the robust watermarks, namely the semantic information. Meanwhile, the middle-frequency coefficient is used as characteristic information to be converted into a fragile watermark; and finally, the fragile watermark is embedded into a movement vector of a P frame. The movement vector of the P frame has the good vulnerability so that the robust semantic watermark, namely the safety and the integrity of the semantic information, can be verified by utilizing the fragile watermark, and the safety of the semantic information is sufficiently guaranteed.

Description

technical field [0001] The invention belongs to the technical field of digital video information security, and more specifically relates to an H264-based semantic information transmission and protection method. Background technique [0002] With the rapid development of electronic integration technology, computer network technology, multimedia technology and many other technologies, multimedia information (text, image, audio and digital video, etc.), especially visualized digital video, has been widely disseminated and applied on the Internet. [0003] However, due to the editability and copyability of digital video, more and more people enjoy the convenience brought by digital video, but also give opportunities for piracy and infringement for different purposes. Therefore, it has become an increasingly serious social problem to take effective measures to protect the copyright and economic interests of digital video authors, and to ensure the safety and credibility of digita...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/913H04N7/26H04N7/50H04N19/467H04N19/625
Inventor 邢玲李国斌张琦何燕玲
Owner SOUTHWEAT UNIV OF SCI & TECH
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