Title :
A New Efficient Method of Computing MDCT in MP3 Audio Coding
Author :
Wu, Guixing ; Yang, En-Hui
Author_Institution :
Sch. of Software Enginerring, USTC, Suzhou, China
Abstract :
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 MDCTalgorithms developed in the literature in terms of computational complexity.
Keywords :
audio coding; computational complexity; discrete cosine transforms; MP3 audio coding; N-point MDCT; N/2-point SDCT; computational complexity; modified discrete cosine transform; scaled discrete cosine transform; Audio coding; Digital audio players; Discrete cosine transforms; Matrix converters; Matrix decomposition; Mirrors; Signal processing algorithms; MDCT; MP3 audio coding; SDCT; computational complexity;
Conference_Titel :
Multimedia Information Networking and Security (MINES), 2010 International Conference on
Conference_Location :
Nanjing, Jiangsu
Print_ISBN :
978-1-4244-8626-7
Electronic_ISBN :
978-0-7695-4258-4
DOI :
10.1109/MINES.2010.21
