AVS变长解码的DSP优化  

Optimization of AVS variable length decoding on DSP

作　　者：于新涛[1] 张宏波[1] 马磊[1] 

机构地区：[1]山东大学信息科学与工程学院,济南250100

出　　处：《计算机工程与应用》2008年第20期93-95,共3页Computer Engineering and Applications

摘　　要：在DM642上对AVS变长解码部分进行了优化。针对指数哥伦布码的特性调整了存储器访问的方式,并通过对循环结构的调整及寄存器资源的合理分配使编译器能够进行高效的软件流水编排。经过优化后代码执行时间降低了70%以上,达到了标清尺寸实时解码要求。The part of AVS variable length decoding is optimized based on DM642.The accessing method is changed according to the property of Exp-Golomb code.By altering the loop structure and assigning the registers appropriately,the compiler can process an effective software pipeline.The executive time is deduced by 30% after optimization,which satisfies the requirements of real-time decoding of standard definition video sequences.

关 键 词：AVS 变长解码 指数哥伦布码 软件流水 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]