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.


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' 360deg of a horizontal soundfield to a 60deg 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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