METHOD FOR DETERMINING A SET OF FILTER COEFFICIENTS FOR AN ACOUSTIC ECHO COMPENSATOR

摘要

Methods and apparatus for beamforming and performing echo compensation for the beamformed signal with an echo canceller including calculating a set of filter coefficients as an estimate for a new steering direction without a complete adaptation of the echo canceller.

主权项

1. A method, comprising:
receiving microphone signals from a plurality of microphones; beamforming of the microphone signals with a beamformer to provide a beamformed signal for a first steering direction; performing echo compensation for the beamformed signal with an echo canceller adapted to the first steering direction using filter coefficients that are stored for a set of steering directions including the first steering direction; receiving an indication of a change to a current steering direction, wherein filter coefficients for the current steering direction are not stored; and calculating a set of filter coefficients as an estimate for the current steering direction corresponding to a time at which the beamformer changes to the current steering direction from microphone time delays for the current steering direction, at least one of the stored sets of filter coefficients, and predetermined microphone time delays associated with the at least one of the stored sets of filter coefficients for enabling echo cancellation at the current steering direction without a complete adaptation of the echo canceller.