The Video Watermarking Algorithms Based On The H.264 In The Compressed Domain

With the rapid development of communication technology, computer and Internet technology, microelectronic computing, people's living habitshave changed dramatically.High-definition digital TV, video on demand(VOD) technology and multimedia sharing site are developing rapidly.Tampering video products become more and more easily, so we have to adopt the effective protection for the video products. In the field of information security research,as a hot area watermarking has gradually entered our attention vision, and in the video products added watermark technology is regarded as a video copyright protection. Because video is a perception of a stroboscopic motion, with the development of digital image, and based on the needs of people's senses. It has been a rapid development, in the Internet digital video products occupies very large proportion. Due to more and more people's attention, some of the effective protection of video products are put forward and get a good application prospects. So in order to get better protection of digital video products, we need to research a better digital video watermarking algorithm.We have entered the era of big data, due to video products' large amount of data, the watermark scheme is difficult to achieve, so we have to solve this problem. Mainstream coding standard h.264/avc has low bit rate, wide application, fault tolerant ability strong, efficient network transmission(with network adaptation layer) and excellent quality of image transmission(1Mbps rate can be reached DVD picture quality) advantages, is widely used in low bit rate wireless applications, network streaming media, network course, video conference and so on many multimedia applications. Because the problem of copyright protection based on video products is becoming more and more serious. Through the research on the characteristics of digital video, a video watermarking scheme based on H.264 is proposed. The paper is as follows:First, brief introduction of digital video watermarking research status and the related theories, including video compression model of H.264 standard, the main features of the embedded video watermarking, we presented below based on H.264 compressed domain video watermarking algorithm conveniently. Human vision system has very important practical significance for the study of the performance of video products, which provides a theoretical basis for the experimental analysis.Second, based on the characteristics of H.264 and the characteristics of the embedded watermark information, this paper proposes a compression domain watermarking algorithm based on H.264 and reference model. The algorithm through on the watermarked image binarization, increase the head information processing, according to the human visual system(HVS), give full consideration to the eye of dynamic video is not sensitive to the characteristics, in predicting the residual blocks of DCT coefficients, is embedded into the low frequency pretreatment of watermark information. The header information which is added in the process of watermark processing can be determined by detecting the watermark information in the video, so that under the premise of being easily detected the algorithm can resist the robustness.Third, using JM8.6 to achieve the watermark embedding and extraction, as well as the video watermark signal processing attacks and synchronization attacks, we compare the changes of the video stream after the attack and video watermarking performance evaluation. Through streameye tools elecard, and MATLAB software simulation, we analyze the experimental data, we fine that the proposed algorithm of the proposed embedding algorithm for the general signal attacks, synchronization attacks have a good anti attack capability. This protection of video products has a very strong practical significance, it is necessary to more in-depth study of video watermarking.with the development of watermarking algorithm there have been so many practical algorithms, and a lot of breakthrough progress, but with the continuous development of current communication technology and multimedia Internet technology, video watermarking is facing more and more problems, and our requirements of video watermarking system were more demanding. But with more in-depth research, the future will be more general and practical video watermarking algorithm is proposed.