The Research Of Digital Video Watermarking Technology

In the wake of the rapid development of multimedia information technology, the use of digital multimedia information is widespreaded, more and more people enjoy the convenience. But everything has advantages and disadvantages, the tamper through the network and other method could facilitate access to the digital media information, and then they could be altered the digital media information by use some advanced processing software. The proper rights of digital products can not be effectively protected. Protection of digital multimedia information security becomes a very important topic in the information age. multimedia information applications more widely, its security work is increasingly important. Though embedding watermarking into digital video products, could encrypting the digital video product, and helping protect the copyright of the digital video products,it is called digital video watermarking technology. Owing to one kinds of the video encoding formats is quite different from another and the human visual system for video models are not established well, video watermarking technology couldn't meet the needs of people. As much as possible to present more and better digital video watermarking technology is in urgent demand. In this paper, some digital video watermarking technology has been studied and the following research work carried out in three areas:(1) In this paper, the video coding technology relate to the watermark embedded have been analysised. And then analysis the research status, the development trend of the video watermarking technology and the difficulties encountered in embedding video watermarks,the problem how to embed watermark and the performance evaluation of video watermarking system.(2) The current mainstream digital video watermarking technology is summarized and analyzed. On this basis, a number of algorithms made some improvements,and proposed a digital video double watermarking technology. Digital video double watermarking technology utilization the characteristics of H.264 video coding,embed the robust watermarking in the I frame by modifying the mid-high frequency DCT coefficient for copyright protection,embed the fragile watermark in the motion vector of the P-frame to the integrity of certification.(3) With the use of multiple watermarking, the interaction of multiple watermarking coexist increasingly highlighted, and in this paper, we analyze the problem:a watermark embedding may affect another watermark embedding.