【作者】 王彩霞； 宋建斌； 李波；

【Author】 WANG Cai-xia SONG Jian-bin LI Bo (School of Computer Science and Engineering,Beihang University,Beijing 100083,China)

【机构】 北京航空航天大学计算机学院；

【摘要】 基于 TI 公司 TMS320C6455DSP(以下简称 C6455)快速实现了 H．264整数变换。首先分析了 H．264整数变换原理及其蝶形算法快速实现方法；然后针对 C6455DSP 的硬件特点和专有指令,通过调整 H．264整数变换过程,将列变换等价转换成矩阵转置与行变换,使用线性汇编语言实现了 H．264整数变换的优化；最后对优化前后的 H．264整数变换速度进行了测试,测试结果表明,经过本文的优化措施后,其效率提高了2．4～2．7倍。更多还原

【Abstract】 Based on TMS320C6455 DSP made by TI Company,integer transform in H.264 is fast realized. Firstly the theory of the integer transforms in H.264 and its butterfly arithmetic fast realization method are analyzed;then the hardware characteristic and particular instructions of C6455 DSP are aimed at,the process of H.264 integer transform is adjusted,line transform to row transform through matrix transfer is switched,line compile language to realize H.264 integer transform optimization is used.At last the speed of the H.264 integer transform before optimization and after optimization is tested,the result is that the efficiency improves 2.4～2.7 times through this paper’s optimization measure.更多还原