The paper derives fast decomposition for the Quadrature Mirror Filter (QMF) banks of the Low power Spectral Band Replication (SBR) tools in the MPEG High Efficiency Advanced Audio Coding (HE AAC) decoder. The matrix operations in the filterbanks are decomposed into elementary Discrete Cosine Transform (DCT) types and simple permutations. The computational complexity can be effectively reduced by using fast algorithms for DCT.

Authors: Chen, Liang-Gee; Huang, Shih-Way; Tsai, Tsung-Han
Affiliations: National Central University; National Taiwan University(See document for exact affiliation information.)
AES Convention: 118 (May 2005) Paper Number: 6336
Publication Date: May 1, 2005 Import into BibTeX
Subject: Signal Processing
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=13052

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