Patent Document ID: 20090262950
Application ID: 12403938
Patent Status: 0

Claim One:
1. A multi-channel acoustic echo cancellation system comprising: a plurality of first microphones disposed within a first acoustic space and configured to generate a plurality of first electronic signals, the plurality of first electronic signals derived from acoustic signals received from a first acoustic source within the first acoustic space; a plurality of speakers disposed within a second acoustic space and coupled to the plurality of first microphones to generate a plurality of second acoustic signals corresponding to the plurality of first electronic signals; a plurality of second microphones disposed within the second acoustic space and configured to generate a plurality of second electronic signals, the second electronic signals derived from acoustic signals received from a second acoustic source within the second acoustic space and echoes of the plurality of second acoustic signals generated within the second acoustic space; and an adaptive filter coupled to the plurality of second microphones and configured to adaptively filter the plurality of second electronic signals to form a plurality of echo-reduced second electronic signals using the plurality of first electronic signals as a reference, wherein the adaptive filter comprises a lattice predictor of order M coupled to a LMS/Newton adaptive filter of length N, wherein M<N.