Based On The Mpeg-4 Motion Estimation And Rate Control Techniques

Efficient video compression techniques are very important to the save and transmission of the increasing data in video processes. Recent years, MPEG-4, the lastest video compression standard has lead the research in related fields. This paper research the MPEG-4 standard and realize the software prototype of the MPEG-4 video codec. The paper emphasize two key techniques in MPEG-4 encoder: Motion Estimation and Bit Rate Control. Motion Estimation takes the largest time in all parts of MPEG-4 encoder. This paper categorize the Motion Estimation algorithms, mainly research the heuristic and time-space related search, and improved two algorithms. Bit Rate Control can guarantee using the bandwidth fully in transmission of the video data. This paper research the technique of Bit Rate Control, based on the analysis of MPEG-4 algorithm, improved some against its existing problems and low bit rate application environment. The test result is satisfied.