【摘要】 为提高编码效率,从运动估计匹配法则的特性分析出发,提出一种基于MSE匹配法则的全零块判决算法.在保持编码质量的前提下,推荐算法能够有效地提高运动估计的速度并减少DCT和量化的运算量.MPEG-4下的实验表明,改进的判决条件能够检测出高达92.6%的全零块;推荐算法比常规算法最大能节省65.7%的整体编码时间.更多还原

【Abstract】 To improve encoding efficiency,beginning with property analysis for the block matching algorithms(BMA),a judgment for detecting all-zero block based on mean squared error(MSE) is proposed.Under contralling encoding quality,the proposed algorithm can effectively improve the motion-estimation speed and reduce the amount of computation in discrete cosine transform(DCT) and quantization.Experiments in MPEG-4 show that the improved judgment can detect 92.6% maximal all-zero blocks,the proposed algorithm can save 65.7% maximal encoding time relative to the normal one.更多还原