【摘要】 因为高清数字电视对图像质量有严格的要求,所以高清数字电视编码采用了计算十分复杂的高精度运动估计方法,而非快速的简单运动估计方法,这就导致了运动估计在视频编码中占用了很多的计算资源。提出了一种结合不同宏块运动特性的方法,以便自适应地选择高精度运动估计方法或简单运动估计方法。该方法通过改变宏块编码顺序与运动向量预测顺序的关系,在减少70%运算时间的情况下仍能保持与高精度方法相同的搜索精度。更多还原

【Abstract】 Because of intense requirement of image quality for digital television,high precision motion estimation algorithms were recommended instead of simple motion estimation algorithms.To benefit from both the speed of simple search and the accuracy of high precision search,a new method making use of inter macroblock characteristic was proposed. According to experiments,a reduction of 70%execution time is attained while still maintaining the same accuracy of high precision search.更多还原