A Research And Design On Robust Video Watermarking Based On H.264Standard

With the rapid development of computer and Internet technology, storage and dissemination of digital video products becomes very convenient. However, the video easy to tamper with the characteristics of the product itself, and the resulting negative impact is also very obvious, piracy, theft and other illegal infringement and video products continue to infringe the copyright of publishers, resulting in product copyright owners’ interests are significant losses. Video watermarking technology can solve video as a copyright information hiding technology, the main research information hidden in the video of copyright works to achieve the purpose of copyright protection and authentication. Video watermarking video information security has become a major research focus.From the wide range of applications in terms of video, video watermarking technology should be highly transparent. From video watermarking technology in terms of copyright protection, video watermarking technology has higher requirements for robustness. However, these two requirements are in conflict. So this study is not affecting the video quality under the premise, try to improve the robustness of the algorithm.This paper presents a multi-coefficient quantization watermarking algorithms. The algorithm is based on the quantification of the relative value using the four coefficients F, to obtain the quantized value F’ Then, modify the four coefficients, so that the newly generated relative size of the four coefficients equal to F. Algorithm has been tested shown a good performance in invisibility and robustness.Finally, this paper presents the characteristics of the H.264standard is based on DCT compressed video watermarking scheme. The program will quantify the relative size of multi-factor watermarking algorithm integrated in the H.264decoder. To enhancing the robustness of the watermark, scrambling the watermark information, the spreading and add header information such pretreatment. In the video the visual test, you can see both the subjective and objective evaluation of the visual, the algorithm watermarked video maintaining a good quality. Similarly, in robustness tests, the program shows a good robustness in the common attacks.