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分析了ＭＰＥＧ２ 的时序模型，研究了理想解码器的输入缓冲器工作过程以及实际实时解码器解码开始的时刻、解码非瞬时、码流非平稳等因素对输入缓冲器的影响，指出实际解码器的输入缓冲器必须增大。在输入缓冲器容量受限制的情况下，给出了输入缓冲器控制策略。该策略已经成功地应用于作者研制的高清晰度电视功能样机中。
The time sequence model of MPEG2 is analyzed. The working process of the input buffer of the ideal decoder and the impact of the start of the decoding of the real-time decoder, the non-instantaneous decoding, the non-steady stream and other factors on the input buffer are analyzed. The input buffer of the device must be increased. The input buffer control strategy is given when the input buffer capacity is limited. The strategy has been successfully applied to the author’s HDTV prototype.