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On the Problem of Detection and Discrimination of Double Talk and Change in the Echo Path
Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
Royal Institute of Technology, Sweden.
Royal Institute of Technology, Sweden.
1996 (English)In: Proceedings of the 1996 IEEE International Conference on Acoustics, Speech and Signal Processing, 1996, 2742-2745 vol.5 p.Conference paper, Published paper (Refereed)
Abstract [en]

The problem of detection and discrimination of double talk and change in the echo path in a telephone channel is considered. The phenomenon echo path change requires fast adaptation of the channel model to be able to equalize the echo dynamics. On the other hand, the adaption rate should be reduced when double talk occurs. Thus, it is critical to quickly detect a change in the echo path while not confusing it with double talk, which gives a similar effect. The proposed likelihood based approach compares a global channel model with a local one over a sliding window, both estimated with the recursive least squares algorithm.

Place, publisher, year, edition, pages
1996. 2742-2745 vol.5 p.
Keyword [en]
Acoustic signal detection, Acoustic signal processing, Adaptive signal detection, Echo suppression, Least squares approximations, Maximum likelihood detection, Recursive estimation
National Category
Control Engineering
Identifiers
URN: urn:nbn:se:liu:diva-93744DOI: 10.1109/ICASSP.1996.550120ISBN: 0-7803-3192-3 (print)OAI: oai:DiVA.org:liu-93744DiVA: diva2:628093
Conference
1996 IEEE International Conference on Acoustics, Speech and Signal Processing, Atlanta, GA, USA, May, 1996
Available from: 2013-06-13 Created: 2013-06-10 Last updated: 2013-06-13

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Gustafsson, Fredrik

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Language
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  • nn-NB
  • sv-SE
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Output format
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