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  • Research Article
  • Open Access

Virtual Microphones for Multichannel Audio Resynthesis

  • 1Email author,
  • 1 and
  • 1
EURASIP Journal on Advances in Signal Processing20032003:876167

  • Received: 30 May 2002
  • Published:


Multichannel audio offers significant advantages for music reproduction, including the ability to provide better localization and envelopment, as well as reduced imaging distortion. On the other hand, multichannel audio is a demanding media type in terms of transmission requirements. Often, bandwidth limitations prohibit transmission of multiple audio channels. In such cases, an alternative is to transmit only one or two reference channels and recreate the rest of the channels at the receiving end. Here, we propose a system capable of synthesizing the required signals from a smaller set of signals recorded in a particular venue. These synthesized "virtual" microphone signals can be used to produce multichannel recordings that accurately capture the acoustics of that venue. Applications of the proposed system include transmission of multichannel audio over the current Internet infrastructure and, as an extension of the methods proposed here, remastering existing monophonic and stereophonic recordings for multichannel rendering.


  • multichannel audio
  • Gaussian mixture model
  • distortion measures
  • virtual microphones
  • audio resynthesis
  • multiresolution analysis

Authors’ Affiliations

Electrical Engineering Systems Department, Integrated Media Systems Center (IMSC), University of Southern California, 3740 McClintock Avenue, Los Angeles, CA 90089-2564, USA


© Copyright © 2003 Hindawi Publishing Corporation 2003