Echo canceller employing dual-H architecture having variable...

Echo canceller employing dual-H architecture having variable...

Echo canceller ensuring further reduction in residual echo

Echo canceller for a full-duplex communication system and...

Echo canceller for non-linear circuits

Echo canceller having improved noise immunity

Echo canceller having improved non-linear processor

Echo canceller having improved non-linear processor

Echo canceller having improved non-linear processor

Echo canceller in a communication system at a terminal

Echo canceller with interference-level controlled step size

Echo canceller with reduced requirement for processing power

Echo cancellers for sparse channels

Echo cancelling/suppression for handsets

Echo cancellor

Echo detection and monitoring

Echo path change detection using dual sparse filtering

Echo prevention circuit having adaptive digital filter

Echo processing apparatus

Echo processing devices for single-channel or multichannel...