The Research Of Video Adaptive Motion Estimation Algorithm And The Application In Video Conferencing System

With the rapid development of computer network and communication technology. The demands for high quality of online multimedia services are ever increasing. Many things will become a part of people's life, such as VOD Video-phone Remote education Net meeting and so on. Under this condition, the traditional video coding method is not fit for using in this real-time system because of the peculiarity of this transmission mechanism. How to improve the performance of video coding on condition of narrowband is hotspot research of video coding field recently.MPEG-4 standard can not only provide high compressing rate, but also realize interactive multimedia content and comprehensive saving better. Motion estimation is one of key technologies of MPEG-4. Due to spending much time, it affects efficiency of the video coding seriously. So, researching high speed motion estimation algorithm has very important sense to improve the efficiency of video coding.In this paper, research motion estimation algorithms of MPEG-4 mainly, and apply to video conferencing. An adaptive motion estimation Algorithm is proposed. Simulation result demonstrate the algorithm is obvious advantage at quality and speed of video coding.Finally, the adaptive motion estimation is implemented in video conferencing system. A multifunctional video conferencing software with smart video coding is designed and developed.