摘要
结合H.264中具体的量化算法,介绍一种基于ADSP-BF533的H.264反量化功能的实现方法,以及利用Blackfin的系统资源和BF533指令特点,对H.264的反量化算法的过程。通过调整查找表和语句结构,充分利用并行操作指令和向量操作指令,提高了反量化的效率。经过测试,和原JM反量化模块代码进行比较,优化后的反量化模块汇编代码执行效率提高了近10倍。
This paper introduces a method of the H. 264 inverse quantization implementation based on the AD- SP-BF533 combining with specific quantization algorithm in H. 264. And we describe the procedure of algorithm optimization using Blackfin system and the feature of BF533 instructions. By adjusting the searching table and structure of sentences, based on parallel and vector instructions, the algorithm improves the efficiency of inverse quantization. It is proved that the executive efficiency of the inverse quantization has been increased significantly compared with the inverse quantization in JM.
出处
《南京邮电大学学报（自然科学版）》
2007年第1期46-50,共5页
Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition
