The Study and Analysis of Video Coding Algorithm at Low Bit Rates

This paper study and analysis the video coding algorithms, which are standard for low bit rate communication. The image source format and picture structure and type are introduced at first. Then the coding algorithms employed in H.263+ and H.264 are introduce, which are a hybrid DPCM/transform algorithm, prediction ,DCT, motion estimation, variable run-length coding,. Furthermore, the generally used mode such as advanced prediction, unrestricted motion vectors, advanced intra coding, deblocking filter, improved PB Frames are explained and analyzed. Finally, using example video, we test the image quality and compression efficiency with different mode.