Patent ID: 9084037
Filing Date: 2015-07-14
Classification: H04R

Abstract:
1. An audio beamforming apparatus comprising: a receiving circuit for receiving signals from an at least two-dimensional microphone array comprising at least three microphones; a reference circuit for generating at least three reference beams from the microphone signals; combining circuit for generating an output signal corresponding to a desired beam pattern by combining the reference beams in response to a first direction of a desired sound source and a direction estimate for an interfering sound source; an estimation circuit for generating the direction estimate by: wherein the combining circuit is arranged to determine combination parameters for the combining of the reference beams to provide a notch in an angle corresponding to the direction estimate of an interfering point source and a maximization of a directivity cost measure of the interfering point source, the directivity cost measure being indicative of a ratio between a gain in the first direction and an average gain.