Based on baseline H.263 video coding, many refinedcoding methods,such as Improved PB-frames and Advanced Intra Coding, and so on,are discussed toimprove the coding efficiency and to optimize video encoder.

• 在给出H.；263主体编码算法的基础上，本文讨论了诸如改进的PB帧和先进的帧内预测编码等多种精细的编码方法来提高编码效率、优化视频编码器。