| With the development of video communication is strongly supported by the advances in the research on video compression algorithms and release of coding standards, especially H.264 which can provide equivalent objective quality at a data rate about 50% lower than that required by H.263 (Baseline) and MPEG-4 (SP). However, the algorithm complexity of H.264 dramatically increases due to the adoption of a number of video coding tools. How to cut down the complexity of H.264 and make it be a practical standard in real-time communication has been a popular issue.Firstly, this paper introduces video coding standards and the development of its historical characteristics. introducing some new coding feature of the H.264 and meantime illustrates the improved coding efficiency enabled by H.264 relative to existing video coding standards. Then, a comprehensive analysis of the H.264 Motion Estimation under which the technical issues,and completed experimental analysis, for the rapid algorithm design to draw some useful conclusions. At the same time, some good fast search algorithms, like PMVFAST (Prediction Motion Vector Field Adaptive Search Technology) have been studied. By improving search mode and speed up policy, OMS (Optimization Mode Search) is proposed, and through experiments show that the algorithm achieved good results. |
