Inter-channel de-correlation for perceptual audio coding

doi:10.1016/j.apacoust.2004.12.003

Inter-channel de-correlation for perceptual audio coding

2005-08-01

5

PRE

AI

S

Soledad Torres

J

Jon A. Beracoechea-Álava

L

Luis I. Ortiz-Berenguer

DOI：10.1016/j.apacoust.2004.12.003

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Sound reproduction is evolving towards multi-channel systems with a growing number of channels. Consequently, high quality multi-channel codecs are required. Last generation perceptual audio codecs, represented by MPEG advanced audio coder (AAC), can efficiently code typical surround multi-channel material but may benefit from a previous block of inter-channel de-correlation, for certain audio recordings. These recordings present high correlation between non-symmetric channels, or correspond to loudspeaker arrangements different from surround, such as linear loudspeaker arrays. In order to valuate the advantages of this new coding approach, a multi-channel perceptual quality measure is developed. (c) 2005 Elsevier Ltd. All rights reserved.

Keyword:

multi-channel audio coding

perceptual quality

inter-channel de-correlation

Karhunen-Loeve transform

linear microphone array

Inter-channel de-correlation for perceptual audio coding

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