Dynamic Rate Control Algorithm for Streaming Media Over Wireless Channel

This paper presents a very efficient approach for Streaming wireless video. The method is based on encoding MPEG video streams using differently encoding technique, I-P(Intra)-B(Intra). P(Intra) frames are coded using motion estimation and each one has a dependency, only on to the preceding I- frame. Similarly, B(Intra) frames are coded based on a forward prediction front a previous I - frame as well as a backward prediction front a succeeding I - frame of the next Group Of Pictures (GOP). The requirements of wireless video include controlled jitter, improved packet loss characteristics and mechanism to dynamically adjust the output hit rate of the video encoder to meet the variable wireless channel throughput. Mechanisms for controlling the proposed MPEG-based streams using dynamic rate control algorithm are also presented and their effectiveness is assessed through extensive simulations. Compared with the MPEG-4 rate control algorithm, our proposed algorithm can effectively enhance loss characteristics, adjust the out video bit rate to meet the variable channel throughput channel; thereby. improve the smoothness of the video.