Conventional video encoder needs large amount of extra memory and circuit to implement the motion-detection function, and has a large computational complexity on rate-control function.
传统视频编码器需要增加大量额外的存储器和电路完成以运动检测功能，且码率控制算法也比较复杂。
The comparison shows that the improved gray scale contrast function has simpler time computational complexity and higher focusing sensitivity.
实验对比表明，这种改进的灰度对比度函数，计算时间复杂度较简单，对焦灵敏度高。
If want get a precision result of main ridge slice of ambiguity function, it requires huge computational complexity, so it is disadvantage to practical application.
但是在分数域上，要想提取所要精度的模糊函数主脊切面，则其计算量很大，不利于实际应用。
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