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提出了一种改进的预先判断视频编码中全零系数的判别准则 ,用于减少低比特率视频编码过程中的冗余计算及运动估计算法的计算复杂性 .实验结果表明 ,对典型的可视电话视频序列 (如Claire) ,有 5 0 %以上的亮度块被判别为全零系数块 ,运动估计的平均搜索次数也减少了 30 %以上 .该方法可被用于减少软件编码器的运算量及其硬件电路的功耗 .
An improved criterion for predicting all-zero coefficients in video coding is proposed to reduce the computational complexity of redundant and motion estimation algorithms in low-bit-rate video coding.The experimental results show that the typical visual In the video sequence of telephone (such as Claire), more than 50% of luma blocks are judged as all-zero coefficient blocks, and the average search times of motion estimation are also reduced by more than 30% .The method can be used to reduce the computation of software encoder And its hardware circuit power consumption.