二维DCT在MVP上的并行实现研究  

Implemention of 2D DCT on MVP

作　　者：沈国斌[1] 杨绿溪[1] 茅一民[1] 

机构地区：[1]东南大学无线电系

出　　处：《电子科技大学学报》1997年第3期267-272,共6页Journal of University of Electronic Science and Technology of China

基　　金：国家自然科学基金

摘　　要：ＤＣＴ是一种被广泛应用于图像压缩编码中的正交变换。ＤＣＴ的运算量极大，因而在一些高速或实时场合，能否快速实现ＤＣＴ就成为一个关键因素。ＴＭＳ３２０Ｃ８０（ＭＶＰ）作为新一代可编程的通用数字信号处理芯片，它支持ＳＩＭＤ和ＭＩＭＤ两种并行模式。文中描述了ＤＣＴ的快速算法和ＴＭＳ３２０Ｃ８０的基本结构及特性，并详述了并行实现的策略，对两种并行模式的加速比作了比较，然后选用了一种高效算法，在ＴＭＳ３２０Ｃ８０上实现。并对结果进行了理论上的分析。DCT is an orthogonal transformation widely used in image compression applications.Because of its high computational cost,the operating speed of DCT will be a key factor in the case where real time processing are required.TMS320C80(MVP) is a recently developed general purpose programmable digital signal processor,which can operate in both SIMD and MIMD concurrent modes.This paper presents the fast algorithms of DCT and the advantages of TMS320C80 architecture,and discusses the parallel strategy of 2D DCT on MVP.The speedups of SIMD and MIMD modes are compared.Finally,Lees fast algorithm is chosen and mapped onto MVP with SIMD mode.The results show that the implemention can meet the requirements of real time applications.

关 键 词：微处理机 多媒体 数字处理器 离散余弦变换 

分 类 号：TN911.72[电子电信—通信与信息系统] TP368.1[电子电信—信息与通信工程]