产生H.263+ 和MPEG4编码标准的一个重要动机就是为了提高压缩视频质量双向实时通讯的质量。在这些应用中，由数据累计的编码器缓冲产生的延迟非常的小，大多小于100ms，并且码率控制策略能有效提高编码高质量和降低编码延迟。-Produce H.263+ and MPEG4 encoding standards is an important motivation is to improve the quality of compressed video quality two-way real-time communication. In these applications, the data accumulated by the encoder buffering delay produced is very small, mostly less than 100ms, and the rate control strategy can effectively improve coding quality and lower coding delay.