A New Efficient Method of ComputingMDCT in MP3 Audio Coding

摘要：

In this paper, a new efficient method of computing modified discrete cosine transform (MDCT) in MP3 audio coding is proposed. We first define a scaled discrete cosine transform (SDCT), then convert N-point MDCT to N/2-point SDCT. Next we factor N/2-point SDCT matrix mathematically. The factored SDCT matrices are used to develop a fast MDCT algorithm for realizing N-point MDCT. We show that the proposed MDCT algorithm outperforms all fast MDCT algorithms developed in the literature in terms of computational complexity.

关键词： MDCT SDCT MP3 audio coding computational complexity

作者: Guixing Wu En-hui Yang

作者单位: School of Software Enginerring Suzhou Institute for Advanced Technology, USTC Suzhou, Jiangsu, P. R. Dept. of Electrical and Computer Eng. University of Waterloo Waterloo, Ontario,Canada

会议类型: 国际会议

会议名称: 2010年IEEE多媒体信息网络与安全国际会议

会议地点: 南京

会议语种:英文

页码: 63-67

在线出版日期: 2010-11-01（万方平台首次上网日期，不代表论文的发表时间）