一种基于通用DSP的快速余弦变换算法

A Fast Discrete Cosine Transform Algorithm Based on General DSP

在对传统快速DCT算法进行分析的基础上 ,充分考虑到通用DSP乘加速度相同等指令特点 ,并且结合DCT变换的性质 ,同时还考虑了对于通用DSP实现相当重要的存取操作的因素 ,提出了一种新的基于通用DSP的快速余弦变换 (FDCT)算法 ,以使总操作数最少。与传统快速DCT相比 ,速度有了明显的提高 ,并且易于实现。

Based on the analysis of the traditional fast DCT algorithm,a new fast DCT algorithm is presented, which takes the advantages of the characteristic of General DSP operands and DCT features.The effect of load and store operation ats also considered in the new algorithm in order to minimize the total operation and reduce the execute time.In addition,a diagram of digital still camera is presented in this paper where we used our new algorithm.