一种快速DCT变换方法的优化  

An Improvement of a Fast DCT Method

作　　者：朱学涛[1] 张志伟[1] 

机构地区：[1]西安电子科技大学技术物理学院,陕西西安710071

出　　处：《电子科技》2004年第9期31-33,共3页Electronic Science and Technology

摘　　要：对用查表法实现DCT变换的方法进行了优化,将有用的余弦乘积值简化至71个,从而缩小了系数表的规模,加快了变换速度,并详细给出了实现的过程。This paper first presents some improvements on DCT using the method of searching tables, which reduces the number of the useful cosine products to seventy-one, thus simplifying the coefficient table and improving the transform speed. This paper also offers a detailed implementation process.

关 键 词：DCT变换 查表法 余弦乘积值 系数表 多媒体压缩 

分 类 号：TN919.81[电子电信—通信与信息系统]