Research On Integer Pixel Motion Estimation Technology Based On H.264 Standard

The emerging H.264 advanced video coding standard (H.264/AVC) achieves significant improvement in coding efficiency compared with the previous standards. This standard can obtain excellent coding efficiency and outperforms the MPEG-4 in the low bit rate environment. So it can meet the requirement of the network-video with low bandwidth and high quality. Motion estimation is one of the core techniques of video coding. Motion estimation and motion compensation can reduce the large amount of temporal redundancy that exists between frames of video sequences, which leads to high compression. The research on looking for a motion estimation algorithm that can get an effective and accurate motion vector quickly becomes a hot topic at present.Firstly, this thesis discusses the basic principle and the essential technologies in H.264 video coding standard. Secondly, introduces several popularly fast block matching motion estimation algorithms and analyzes their advantages and disadvantages. Then in order to cover the shortage of the fast block matching motion estimation algorithms, this thesis proposes an efficient and fast block matching motion estimation algorithm——the improved and enhanced three-step search (ENTSS) algorithm. A series of skills, such as initial search center prediction, early termination, search template based on hybrid technology are also adopted in this algorithm.Experimental results by testing different video sequence show that the ENTSS algorithm can highly reduce computational complexity with little video quality dropping compared with FS and UMHeaxgonS. Also this algorithm can improve the speed of motion estimation, reduce encoder computation efficiently and improve the coding efficiency.