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A Wideband Automotive Hands-Free System for Mobile HD Voice Services

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Smart Mobile In-Vehicle Systems

Abstract

Wideband mobile telephony supporting a speech bandwidth from 50 to 7,000 Hz gets more and more employed. These so-called mobile HD Voice services consequently find their way into automobile applications. In this chapter we present a wideband hands-free system for automotive telephony applications with a synchronously adapted acoustic echo canceller and postfilter. It is based on a frequency domain adaptive filter approach and Kalman filter theory and makes use of a generalized Wiener postfilter for residual echo suppression and noise reduction in a consistent way. To provide a high convergence rate in case of time-variant echo paths, the echo canceller with very robust double-talk performance is supported by a fast converging shadow filter, which allows for a good tracking performance. A decimation approach is used to decrease algorithmic delay and computational complexity without loss of quality. Experimental results with car cabin impulse responses show good echo cancellation capabilities with fast convergence times along with extraordinary full-duplex performance while still keeping an almost untouched speech component in the converged state.

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Authors and Affiliations

  1. Institute for Communications Technology, Technische Universität Braunschweig, Schleinitzstr. 22, Braunschweig, D-38106, Germany

    Marc-André Jung & Tim Fingscheidt

Authors
  1. Marc-André Jung
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  2. Tim Fingscheidt
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Corresponding author

Correspondence to Marc-André Jung .

Editor information

Editors and Affiliations

  1. Christian-Albrechts-Universität, Kiel, Germany

    Gerhard Schmidt

  2. San Diego State University, San Diego, California, USA

    Huseyin Abut

  3. Nagoya University, Nagoya, Japan

    Kazuya Takeda

  4. The University of Texas at Dallas, Dallas, Texas, USA

    John H.L. Hansen

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Jung, MA., Fingscheidt, T. (2014). A Wideband Automotive Hands-Free System for Mobile HD Voice Services. In: Schmidt, G., Abut, H., Takeda, K., Hansen, J. (eds) Smart Mobile In-Vehicle Systems. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-9120-0_6

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  • DOI: https://doi.org/10.1007/978-1-4614-9120-0_6

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  • Publisher Name: Springer, New York, NY

  • Print ISBN: 978-1-4614-9119-4

  • Online ISBN: 978-1-4614-9120-0

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