高速率AVS整数变换的汇编实现与优化  

Implementation and Optimization of High-speed AVS Integer Transform Based on Assembly Language

作　　者：侯兆然[1] 方勇[1] 

机构地区：[1]上海大学通信与信息工程学院,上海200072

出　　处：《电视技术》2008年第1期26-28,共3页Video Engineering

基　　金：教育部高等学校博士学位点专项科研基金项目(20060280003)

摘　　要：简要介绍了AVS视频编码中耗时较长的整数变换部分,深入分析了不同的算法模式,分别应用MMX,SSE2和侧重乘法操作的SSE2等单指令多数据技术对AVS整数变换的关键算法模块进行优化。实验结果表明:3种优化方法均提高了整数变换的编码速率,性能最优的SSE2优化算法比未优化时的编码速度提高了约6.3倍,单次变换平均时延减少到0.5ms以内。The time-consuming integer transform in AVS video coding is briefly introduced, and different algorithm modes are deeply analysed. Then, three Single Instruction Multiple Data （SIMD） technologies including MMX, SSE2 and multiplication-oriented SSE2 are used to optimize the key algorithm modes of AVS integer transform. The experimental, results indicate that all of the three optimized algorithms can improve the coding speed of integer transform, especially the multiplication-oriented SSE2. The coding speed optimized by multiplication-oriented SSE2 is significantly improved up to 6.3 times than the original speed, and the average time delay of single transform is reduced to less than 0.5 ms.

关 键 词：AVS标准 整数变换 汇编语言 多媒体扩展技术 SSE2指令集 

分 类 号：TN919.81[电子电信—通信与信息系统]