MULTI-CHANNEL ACOUSTIC ECHO CANCELLATION SYSTEM AND METHOD

摘要

Techniques for multi-channel acoustic echo cancellation include adaptive filtering. An adaptive filter can use a lattice predictor of order M coupled to an adaptive LMS/Newton filter of length N, wherein M N. The lattice predictor can provide decorrelation of the input to the LMS/?ewton filter and can provide faster convergence for the LMS/?ewton filter. Efficient operation of the LMS/?ewton filter can also be provided by using output from the lattice predictor to provide low complexity update of weights for the LMS/?ewton filter.