Improved Radix-3 Decimation-in-Frequency Algorithm for the Fast Computation of Forward and Inverse MDCT

摘要：

Shu et al. recently proposed an efficient radix-3 decimation-in-Frequency (DIF) algorithm for the fast computation of forward and inverse modified discrete cosine transform (MDCT). Their algorithm decomposes the MDCT of a sequence with length N=2×3m and the IMDCT of a sequence with length N=4×3m into three N/3-point MDCTs and IMDCTs, respectively. In this paper, we present a refinement of their approach. Comparison with Shu’s algorithm shows that the number of arithmetic operations can be reduced from 17.5％ to 20.5％ for MDCT and from 23.1％ to 27.9％ for IMDCT when N is varying from 36 to 324.

作者: Jiasong Wu Lu Wang Lotfi Senhadji Huazhong Shu

作者单位: LIST, Southeast University, 2 Sipailou, 210096, Nanjing, China;INSERM, U642, Rennes, F-35000, France LIST, Southeast University, 2 Sipailou, 210096, Nanjing, China;Centre de Recherche en Information Bi INSERM, U642, Rennes, F-35000, France;LTSI, Université de Rennes 1, Campus Beaulieu, Rennes, F-35042

会议类型: 国际会议

会议名称: 第十届中国虚拟现实年会

会议地点: 上海

会议语种:英文

页码: 694-699

在线出版日期: 2010-10-20（万方平台首次上网日期，不代表论文的发表时间）