An echo cancellation apparatus (20) and method involves an operation AEPR for analyzing echo path response and thereafter an operation CR for configuring an adaptive FIR filter (52). The configuration of the adaptive filter (52) advantageously results in only a range of filter taps and coefficients between...http://www.google.de/patents/US5920548?utm_source=gb-gplus-sharePatent US5920548 - Echo path delay estimation
