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Convention Paper

Low Bit-Rate Audio Coding in Multichannel Digital Wireless Microphone Systems

Authors: Wray, Stephen

AES Convention 126 · Paper 7714 · May 2009

Abstract

Despite advances in voice and data communications in other domains, sound production for live events (concerts, theatre, conferences, sports, worship, etc) still largely depends on spectrum-inefficient forms of analogue wireless microphone technology. In these live scenarios, low-latency transmission of high-quality audio is mission critical. However, while demand increases for wireless audio channels (for microphones, in-ear monitoring and talkback systems), some of the radio bands available for “Programme Making and Special Events” are to be re-assigned for new wireless mobile telephony and Internet connectivity services: the FCC recently decided to permit so-called White Space Devices to operate in sections of UHF spectrum previously reserved for shared use by analogue TV and wireless microphones. This paper examines the key performance aspects of low bit-rate audio codecs for the next generation of bandwidth-efficient digital wireless microphone systems that meet the future needs of live events.

Details

Published in
AES Convention 126
AES Convention
126
Paper number
7714
Publication date
May 6, 2009
Session subject
Audio Coding
Affiliation
APT Licensing Ltd., Belfast, Northern Ireland, UK (See document for exact affiliation information.)
Type
Convention Paper