摘要
H.264视频编码标准采用整数离散余弦变换(DCT)算法,避免了反变换中的误匹配问题,与传统的余弦变换相比,整数DCT加快了变换速度,且易于硬件实现.本文分析了H.264的整数DCT的原理及采用蝶形快速算法的实现方法,对整数DCT的变换核进行了优化,并对新的变换核应用MATLAB软件进行了仿真.结果表明,采用优化后的变换核的整数DCT更接近于离散余弦变换,且提高了重建视频图像的主观质量.
Using the integer Discrete Cosine Transform（ DCT）, H. 264 avoids the mismatch problem, and in-creases the computation speed and make hardware implementation easy. This paper analysed the principle of the H. 264 integer DCT and fast papilionaceous algorithm, and changed its transform core, simulated the new core using MATLAB. The results show that integer DCT with new transform core is closer than DCT, and enhances the subjective quality of reconstruction image.
出处
《哈尔滨理工大学学报》
CAS
北大核心
2009年第5期27-30,34,共5页
Journal of Harbin University of Science and Technology
关键词
整数DCT
蝶形快速算法
变换核
integer DCT
fast papilionaceous algorithm
transform core
