Patent ID: 9602922
Date: 2017-03-21
CPC Classifications: H04B,H04M,H04R

Claim:
1. A system, comprising: a speaker; a microphone that captures sound from an environment including the speaker and generates an input audio signal; a first adaptive filter configured to dynamically update a plurality of first filter parameters and to produce a first estimated echo signal representing an echo component of an input audio signal, wherein the echo component is a result of audio propagating over one or more echo paths between the speaker and the microphone; an adaptation controller configured to: a second adaptive filter configured to a parameter update controller configured to update second filter parameters from the first filter parameters under one or more specified conditions, wherein at least one of the one or more specified conditions is based, at least in part, on the change in the one or more echo paths; and a subtraction component configured to subtract the second estimated echo signal from the input audio signal to produce an echo-suppressed audio signal.