用改进的MPEG-4分层算法实现网络视频

实现网络视频首先要在发送端对连续的图像图形进行压缩编码，其次要将编码的比特流分层表示，第三要解决图像在网上传输时出现的包丢失问题。本文从上述三个方面出发，对MPEG－4分层编码算法进行改进，并用改进的算法实现基于物体的编码和比特流的分层表达；采用传输解码缓存模型实现图象传输的连续性，用优先重传技术解决包丢失问题，实验结果表明，上述理论是实现网络视频的较为优选的方案。

Net Video Realizing by Using The Modified MPGE -4 Multiscale Algorithm

To transmit video in int ernet,three steps must be done.First,the video should be encoded in transm it ter.Second,bit stream must be represented as mul tilayer stream.Then,the que stion of package losing when video image going through net.In this paper,We pr oposed a new css -based shape cod ing al-gorithm to modify the image encoder a lgorithm in MPEG -4.Using the modified algorithm,we encode the video and re present the stream as multilayer bit stream.The integrated transport -decoder buffer ensure the video be continuously transmitted.Losing package can be reco vered by using re -transmission.