该文阐述了音频压缩编码器的系统构成及基本原理，并且详细地的说明了硬件电路设计思想及相关时序波形的分析。
Not only the system architecture and basic principle are described in this paper, but also the design ideas are proposed and timing sequence of hardware is analyzed in detail.
运动估计是视频编码器的重要组成部分，占整个压缩编码50%以上的计算量。
Motion Estimation plays a very important part in video encoder, which accounted for more than 50% of the amount of coding.
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