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On the problem of detection and discrimination of double talk and change in the echo path
KTH, Superseded Departments, Signals, Sensors and Systems.
KTH, Superseded Departments, Signals, Sensors and Systems.ORCID iD: 0000-0002-1927-1690
1996 (English)In: Acoustics, Speech, and Signal Processing, 1996. ICASSP-96. Conference Proceedings., 1996 IEEE International Conference on, 1996, Vol. 5, 2742-2745 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. Vol. 5, 2742-2745 p.
Keyword [en]
adaption rate;channel model adaptation;double talk detection;double talk discrimination;echo dynamics equalisation;echo path change;global channel model;likelihood based approach;local channel model;recursive least squares algorithm;sliding window;telephone channel;acoustic signal detection;acoustic signal processing;adaptive signal detection;echo suppression;least squares approximations;maximum likelihood detection;recursive estimation;telecommunication channels;telephony;
National Category
Control Engineering
Identifiers
URN: urn:nbn:se:kth:diva-57955DOI: 10.1109/ICASSP.1996.550120OAI: oai:DiVA.org:kth-57955DiVA: diva2:472757
Note
NR 20140805Available from: 2012-01-04 Created: 2012-01-04 Last updated: 2013-09-05Bibliographically approved

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Wahlberg, Bo

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