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On the Problem of Detection and Discrimination of Double Talk and Change in the Echo Path
Royal Institute of Technology, Sweden.
Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
1995 (English)Report (Other academic)
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
Linköping: Linköping University , 1995. , 3 p.
Series
LiTH-ISY-R, ISSN 1400-3902 ; 1790
Keyword [en]
Telephone channels, Echo path, Double talk, Signals
Keyword [sv]
Telefonteknik, Elektronik: kretsar
National Category
Control Engineering
Identifiers
URN: urn:nbn:se:liu:diva-55281ISRN: LiTH-ISY-R-1790OAI: oai:DiVA.org:liu-55281DiVA: diva2:315845
Available from: 2010-04-29 Created: 2010-04-29 Last updated: 2014-08-26Bibliographically approved

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On the Problem of Detection and Discrimination of Double Talk and Change in the Echo Path(156 kB)107 downloads
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Gustafsson, Fredrik

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
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  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf