This paper presents a novel lossless multichannel audio coding algorithm to remove inter-channel redundancy. We employ an Integer-to-Integer Discrete Cosine Transform (INT-DCT) to perform inter-channel decorrelation after quantization of Modified Discrete Cosine Transform (MDCT) coefficients of individual channels. When compared with a Karhunen-Loeve Transform (KLT) based approach our new method has three major advantages: 1) avoids quantization noise spreading to other channels; 2) computational simplicity; 3) uses less overhead information (a quantized covariance matrix or eigenvector is avoided in our algorithm), while having a similar decorrelation capability.

Authors: Yaroslavsky, Leonid; Vilermo, Miikka; Vaananen, Mauri; Wang, Ye
Affiliations: Speech and Audio Systems Laboratory, Nokia Research Center, Tampere, Finland ; Department of Interdisciplinary Studies, Tel Aviv University, Ramat Aviv, Israel(See document for exact affiliation information.)
AES Convention: 110 (May 2001) Paper Number: 5295
Publication Date: May 1, 2001
Subject: Low-Bit Rate Audio Coding

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