"Proportionate normalized least mean square adqaptation in echo canceller" by D. L. Duttweiler, IEEE Trans. Speech Audio Processing, sept 2000 --- Sudarini Pushparajah <> wrote: > Hi, > I am working on a time-domain echo canceller > project. > I found out that in network echo cancellers, the > delay is significant > while the active echo path is small (16ms). However, > to model the > entire echo path (delay + active region) a large > number of filter taps is > required. I understand that in many applications, > the echo path delay is > estimated and therfore the active region is > identified. This in turn > reduces the number of filter taps needed to be > updated. Can anyone please > tell me how this time-delay is estimated in echo > cancellers, how accuratly > it is done and where I can get more information on > this?. > Thanks > Sudarini _________________________________________________________________ > Get your FREE download of MSN Explorer at > http://explorer.msn.com/intl.asp > http://travel.yahoo.com.au - Yahoo! Travel - Got Itchy feet? Get inspired! |