On the Problem of Detection and Discrimination of Double Talk and Change in the Echo Path
1995 (English)Report (Other academic)
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.
LiTH-ISY-R, ISSN 1400-3902 ; 1790
Telephone channels, Echo path, Double talk, Signals
Telefonteknik, Elektronik: kretsar
National CategoryControl Engineering
IdentifiersURN: urn:nbn:se:liu:diva-55281ISRN: LiTH-ISY-R-1790OAI: oai:DiVA.org:liu-55281DiVA: diva2:315845