Research And Implementation Of H.264 Intra-prediction

H.264 is the newest video coding standard of the ITU-T Video Coding Experts Group (VCEG) and the ISO/IEC Moving Picture Experts Group (MPEG). H.264 adopted many effective methods to improve compression performance.So it can achieve considerable higher coding efficiency than previous standards.Besides, H.264 processes the provision of"network -friendly".However, the high complexity comes with the high compression, so it is difficult to implement in real-time applications.Thus, we must optimize the algorithm to reduce the complexity.The article provides an overview of technical features of H.264, introduce the theory of intra prediction in detail, and advance two novel improved fast algorithms of intra prediction.Intra prediction of H.264 utilizes the spatial relativity to compress. H.264 adoptes Full Search algorithm based on Rate Distortion Optimization (RDO) to select the best predictive mode.In this way, the computation is drastically increased. The article,firstly, optimize the Pan's algorithm, and the simulation results show that without considerable performance degradation, the proposed method decreases complexity of the intra-prediction mode decision.Secondly, the paper analyze another two methods of edge detection, and proposed its improvement algorithm. Experimental results show that the proposed algorithm reduces coding time without considerable performance degradation.Besides, it is easily to apply to hardware.