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A Novel Very Low Bit Rate Multi-Channel Audio Coding Scheme using Accurate Temporal Envelope Coding and Signal Synthesis Tools

Multichannel audio is increasingly ubiquitous in consumer audio applications such as satellite radio broadcast systems, surround sound playback systems, multichannel audio streaming and other emerging applications. These applications often present a challenging bandwidth constraint making parametric multichannel coding schemes attractive. Several techniques have been proposed recently to address this problem. Here we present a novel low bit rate 5 channel encoding system that has shown promising results. This technique called the Immersive Soundfield Rendition (ISR) System emphasizes accurate reproduction of multi-band temporal envelope. The ISR system also incorporates a very low over-head (blind upmixing) mode. The proposed multichannel coding system has yielded promising results for multi-channel coding in the 0-12 kbps range. More information and audio demos will be available at http://ww.atc-labs.com/isr

Authors: Dubey, Chandresh; Ferreira, Anibel J. S.; Gupta, Richa; Sinha, Deepen
Affiliations: ATC Labs; University of Porto(See document for exact affiliation information.)
AES Convention:121 (October 2006) Paper Number:6875 Import into BibTeX
Subject:Audio Coding

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