Title
Principles and Analysis of the Squeezing Approach to Low Bit Rate Spatial Audio Coding
Document Type
Conference Paper
Publication Date
April 2007
Abstract
This paper presents a novel solution to multichannel spatial audio coding: Spatial Squeezing Surround Audio Coding (S3AC). The S3AC scheme analyses a multichannel audio signal and downmixes it into a stereo signal pair containing both the monophonic properties of audio sources and their localization information; this avoids the need for side information. The approach uses time-frequency analysis of a spatial audio scene and exploits virtual sources and amplitude panning techniques to `squeeze' 360° of a horizontal soundfield to a 60° stereo signal pair. In comparison with other spatial audio coding techniques, S3AC significantly advances in-band encoding of the localization information in the original sound scene and achieves accurate recoverability of dynamic localized sources.
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Publication Details
This paper was originally published as: Cheng, B, Ritz, C & Burnett, I, Principles and Analysis of the Squeezing Approach to Low Bit Rate Spatial Audio Coding, IEEE International Conference on Acoustics, Speech and Signal Processing 2007 (ICASSP 2007), Honolulu, Hawaii, USA, 15-20 April 2007, 1, I-13-I-16. Copyright 2007 IEEE.