Bidirectional adaptive voice frequency repeater.

摘要

A large signal detector (106) is employed to detect large amplitude signals incoming to a bidirectional repeater. An output from the detector is supplied (via 115) to echo cancelers (114, 115) in the repeater and is used to inhibit (via 230, Figure 2) updating of the echo canceler impulse response characteristic during intervals that such large incoming signals are present.