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A Perspective on Stereophonic Acoustic Echo Cancellation

  • Book
  • © 2011

Overview

Authors:
  1. Jacob Benesty

    1. INRS-EMT, University of Quebec, Montreal, Canada

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  2. Constantin Paleologu

    1. Telecommunications Department, University Politehnica of Bucharest, Bucharest, Romania

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  3. Tomas Gänsler

    1. mh acoustics LLC, Summit, USA

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  4. Silviu Ciochină

    1. Telecommunications Department, Politehnica University of Bucharest, Bucharest, Romania

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  • Delivers a new convenient formulation with single-input/single-output
  • System with complex random variables for stereo acoustic echo canceller
  • Includes experimental studies Written by well-knows experts in the area

Part of the book series: Springer Topics in Signal Processing (STSP, volume 4)

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Table of contents (9 chapters)

  1. Front Matter

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  2. Introduction

    • Jacob Benesty, Constantin Paleologu, Tomas Gänsler, Silviu Ciochină
    Pages 1-4

  3. Problem Formulation

    • Jacob Benesty, Constantin Paleologu, Tomas Gänsler, Silviu Ciochină
    Pages 5-11

  4. System Identification with the Wiener Filter

    • Jacob Benesty, Constantin Paleologu, Tomas Gänsler, Silviu Ciochină
    Pages 13-27

  5. A Class of Stochastic Adaptive Filters

    • Jacob Benesty, Constantin Paleologu, Tomas Gänsler, Silviu Ciochină
    Pages 29-48

  6. A Class of Affine Projection Algorithms

    • Jacob Benesty, Constantin Paleologu, Tomas Gänsler, Silviu Ciochină
    Pages 49-62

  7. Recursive Least-Squares Algorithms

    • Jacob Benesty, Constantin Paleologu, Tomas Gänsler, Silviu Ciochină
    Pages 63-69

  8. Double-Talk Detection

    • Jacob Benesty, Constantin Paleologu, Tomas Gänsler, Silviu Ciochină
    Pages 71-79

  9. Echo and Noise Suppression as a Binaural Noise Reduction Problem

    • Jacob Benesty, Constantin Paleologu, Tomas Gänsler, Silviu Ciochină
    Pages 81-94

  10. Experimental Study

    • Jacob Benesty, Constantin Paleologu, Tomas Gänsler, Silviu Ciochină
    Pages 95-135

  11. Back Matter

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Keywords

About this book

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.

Authors and Affiliations

  • INRS-EMT, University of Quebec, Montreal, Canada

    Jacob Benesty

  • Telecommunications Department, University Politehnica of Bucharest, Bucharest, Romania

    Constantin Paleologu

  • mh acoustics LLC, Summit, USA

    Tomas Gänsler

  • Telecommunications Department, Politehnica University of Bucharest, Bucharest, Romania

    Silviu Ciochină

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