Fast decomposition of filterbanks for the state-of-the-art audio coding

Shih Way Huang; Tsung Han Tsai; Liang Gee Chen

doi:10.1109/LSP.2005.855550

Fast decomposition of filterbanks for the state-of-the-art audio coding

Shih Way Huang, Tsung Han Tsai, Liang Gee Chen

電機工程學系

研究成果: 雜誌貢獻 › 期刊論文 › 同行評審

8 引文斯高帕斯（Scopus）

摘要

This letter derives fast decomposition for the quadrature mirror filterbanks (QMFs) of the low power spectral band replication (SBR) tools in the MPEG high efficiency advanced audio coding (HE AAC) decoder. In contrast with the standard method where computation-intensive matrix operations are employed in the QMF, the proposed method decomposes the matrix operations into conventional discrete cosine transform of type II and III (DCT-II and DCT-III) and simple permutations for easy implementation. The computational complexity can be also reduced effectively by using fast algorithms for DCT.

原文	???core.languages.en_GB???
頁（從 - 到）	693-696
頁數	4
期刊	IEEE Signal Processing Letters
卷	12
發行號	10
DOIs	https://doi.org/10.1109/LSP.2005.855550
出版狀態	已出版 - 10月 2005

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10.1109/LSP.2005.855550

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AB - This letter derives fast decomposition for the quadrature mirror filterbanks (QMFs) of the low power spectral band replication (SBR) tools in the MPEG high efficiency advanced audio coding (HE AAC) decoder. In contrast with the standard method where computation-intensive matrix operations are employed in the QMF, the proposed method decomposes the matrix operations into conventional discrete cosine transform of type II and III (DCT-II and DCT-III) and simple permutations for easy implementation. The computational complexity can be also reduced effectively by using fast algorithms for DCT.

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Fast decomposition of filterbanks for the state-of-the-art audio coding

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