摘要
AVS中的运动搜索和变换域编码是运算量很大的部分,也影响了系统的实时编码效率。该文重点介绍了全零块判决方法的改进,即在运动搜索中对差值块先进行全零块判决,以减少整数变换和相应的量化运算,从而提高了编码效率,以及DCT的相关知识。利用VC6.0对源代码和修改后的代码进行了仿真实验,验证了改进后的代码比源代码在全零块判决效率上有了很大的提高。
The computation in video codec mainly concentrates on transformation and motion search,which are the bottlenecks of realization of real time video codec in AVS.This paper focuses on the improvement of the all-zero blocks decision method ,that is for sum of the absolute differences(SAD) block of the first all-zero blocks decision during motion search to reduce the integer transform and the corresponding quantization operation,thereby increasing the coding efficiency as well as DCT-relevant knowledge.Using VC6.0 to the source code and modified code processes simulation experiment,testing the modified source code having great improvement than the efficiency in the all-zero block judgments.
出处
《电脑知识与技术》
2010年第3X期2161-2162,共2页
Computer Knowledge and Technology
关键词
AVS
全零块判决
整数DCT变换
绝对误差和
AVS
all-zero blocks decision
integer DCT transform
sum of the absolute differences(SAD)
