Table of contents

  1. Front Matter
  2. Jacob Benesty, Constantin Paleologu, Tomas Gänsler, Silviu Ciochină
    Pages 1-4
  3. Jacob Benesty, Constantin Paleologu, Tomas Gänsler, Silviu Ciochină
    Pages 5-11
  4. Jacob Benesty, Constantin Paleologu, Tomas Gänsler, Silviu Ciochină
    Pages 13-27
  5. Jacob Benesty, Constantin Paleologu, Tomas Gänsler, Silviu Ciochină
    Pages 29-48
  6. Jacob Benesty, Constantin Paleologu, Tomas Gänsler, Silviu Ciochină
    Pages 49-62
  7. Jacob Benesty, Constantin Paleologu, Tomas Gänsler, Silviu Ciochină
    Pages 63-69
  8. Jacob Benesty, Constantin Paleologu, Tomas Gänsler, Silviu Ciochină
    Pages 71-79
  9. Jacob Benesty, Constantin Paleologu, Tomas Gänsler, Silviu Ciochină
    Pages 81-94
  10. Jacob Benesty, Constantin Paleologu, Tomas Gänsler, Silviu Ciochină
    Pages 95-135
  11. Back Matter

About this book

Introduction

Single-channel hands-free teleconferencing systems are becoming popular. In order to enhance the communication quality of these systems, more and more stereophonic sound devices with two loudspeakers and two microphones are deployed. Because of the coupling between loudspeakers and microphones, there may be strong echoes, which make real-time communication very difficult. The best way we know to cancel these echoes is via a stereo acoustic echo canceller (SAEC), which can be modelled as a two-input/two-output system with real random variables. In this work, the authors recast this problem into a single-input/single-output system with complex random variables thanks to the widely linear model. From this new convenient formulation, they re-derive the most important aspects of a SAEC, including identification of the echo paths with adaptive filters, double-talk detection, and suppression.

Keywords

FRLS fast recursive least-squrares IPNLMS improved proportionate normalized least-mean-square PAPA proportionate affine projection algorithm RLS recursive least-squares VSS-NLMS variable step size normalized least-mean-square Wiener filter double-talk detection stereophonic acoustic echo cancellation suppression widely linear model

Authors and affiliations

  • Jacob Benesty
    • 1
  • Constantin Paleologu
    • 2
  • Tomas Gänsler
    • 3
  • Silviu Ciochină
    • 4
  1. 1.INRS-EMTUniversity of QuebecMontrealCanada
  2. 2.Telecommunications DepartmentUniversity Politehnica of BucharestBucharestRomania
  3. 3.mh acoustics LLCSummitUSA
  4. 4.Telecommunications DepartmentPolitehnica University of BucharestBucharestRomania

Bibliographic information

  • DOI https://doi.org/10.1007/978-3-642-22574-1
  • Copyright Information Springer-Verlag GmbH Berlin Heidelberg 2011
  • Publisher Name Springer, Berlin, Heidelberg
  • eBook Packages Engineering
  • Print ISBN 978-3-642-22573-4
  • Online ISBN 978-3-642-22574-1
  • Series Print ISSN 1866-2609
  • Series Online ISSN 1866-2617
  • About this book