Video Watermarking Technology Based On Simmons Threshold Theory

With the rapid development multimedia and Internet technology, the network bandwidth has greatly improved. More and more digital works, such as images, audio and video is widely spread on the Internet. On the other hand, it also caused many copyright infringement problems. In recent years, three nets fusion, cloud computing and other technology has made the copyright protection becomes more urgent. Digital watermarking technology is an important solution for copyright protection. These paper mainly researched the robust video watermark scheme which is combing the H.264standard. The main works of this paper are as follows:First of all, in this paper, the related technology about digital video watermark is described in detail, such as the situation of the digital video watermarking, the introduction about H.264. In addition, according to the secret sharing scheme, this paper proposes a modified scheme of Simmons threshold secret image sharing for h.264video watermarking system. In the algorithm, the original watermark image is divided into n secret images. Any t secret images (t<n) can be used to restore the original watermark information. To resist the frame deletion attack, t secret images are embedded in different luma frames.Secondly, another algorithm will be proposed in this paper in order to reduce error drift in h.264intra luma prediction mode. This algorithm can be used to effectively select the watermark embedding position to reduce the error drift.Finally, the proposed scheme is realized by Matlab and C language programming. There is a series simulation test such as invisible, anti-weight-based attacks, anti-noise attack and attacks against frame erasing and a quantitative analysis for test results and qualitative analysis compared with other algorithms. Experimental results show that this video watermarking scheme with the secret image sharing technique greatly increases the security.