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Conference Paper

From SAC to SAOC—Recent Developments in Parametric Coding of Spatial Audio

Authors: Herre, Jürgen; Disch, Sascha; Hilpert, Johannes; Hellmuth, Oliver

AES Conference: UK 22nd Conference: Illusions in Sound · Paper 12 · April 2007

Abstract

One of the most remarkable innovations in low bit rate audio coding during the recent years was the arrival of “Spatial Audio Coding” (SAC) technology. Exploiting the human perception of spatial sound, these coding schemes are capable of transmitting high quality surround sound using bitrates that have been used for carrying traditional two-channel stereo audio so far. Following the recent finalization of the MPEG Surround specification, a next technology generation is envisaged for standardization within ISO/MPEG allowing bit rate-efficient and backward compatible coding of several sound objects. On the receiving side, such a “Spatial Audio Object Coding” (SAOC) system renders the objects interactively into a sound scene on a reproduction setup of choice. The paper reviews the principles and current status of Spatial Audio Coding schemes and discusses their evolution towards Spatial Audio Object Coding with particular focus on the ongoing ISO/MPEG Audio standardization activities in this field.

Details

Published in
AES Conference: UK 22nd Conference: Illusions in Sound
Paper number
12
Publication date
April 6, 2007
Session subject
Audio coding
Affiliation
Fraunhofer Institute for Integrated Circuits (See document for exact affiliation information.)
Type
Conference Paper