The Research On Video Watermarking Based On H.264

With the rapid development of the Internet, multimedia video applications are increasingly popular. Information technology brings convenience to people living, at the same time, its abuse is causing a lot of problems:video copyright, content legality, validity, integrity is threatened. Digital video watermark as a continuation of the information security, it provides reliable to protect copyrights and content integrity protection. Digital Video Watermarking in the Internet age has a vast market value.H.264encoding standard, as currently widely used encoding standards, have a very high research value and market value. Paper presents two video Watermarking scheme based on the H.264encoding standard:robust watermarking algorithm based on mode selection and reference block control watermark embedding and Semi-fragile watermarking scheme based on intra and inter.Robust watermarking algorithm based on mode selection and reference block control watermark embedding, on this basis combined with a Visual property, in the I-frame macroblock prediction coding, according to the two encoding mode (16×16、4×4), with different rules for the choice of watermark embedding block, and according to the characteristics of the module code in the algorithm using the reference module to choose the watermark embedding region, completion of the embedding of watermark. Small modifications to the data in this algorithm, strong robustness and simple program for the blind extraction.Semi-fragile watermarking scheme based on intra and inter-frames. In the I-frame, the use of visual characteristics based on optimal embedding block, by modulating a quantized DCT block achieving watermark embedding with hidden. In the P-frames, select small module segmentation model of watermark embedding, at the same time, choose motion component through the reference Watermarking, dynamic select embedded components. This scheme algorithm for simple, efficient, video quality and bit-rate has little effect. Embed a watermark I frame with strong robustness and fragility of the watermark in the p has a very good.This paper presents two watermarking scheme, on the watermarked video intra and inter-frame predictive coding,using Lagrangian optimization operator to control the choice of the prediction model, which reduces the bit rate and distortion rate of increase in the watermark embedding.