Patent ID: 9049503
Filing Date: 2015-06-02
Classification: G10L,H04R

Abstract:
1. A method for beamforming using a microphone array, the method comprising: capturing an input, the input including an audio signal of interest and noise, using a microphone array; providing a beamformer including two parallel adaptive filters, to filter the input, a first adaptive filter having low speech distortion (LS) and a second adaptive filter having high noise suppression (SNR), wherein each of the parallel adaptive filters has a different filter weight, a filter weight of the first adaptive filter is determined based on a least squares solution and a filter weight of the second adaptive filter is determined based on a quadratic ratio between an output signal power to an output noise power; and determining a weight (θ) to adjust a percentage of combining the adaptive filter weights; and generating an output of the beamformer by applying the weight (θ) to the adaptive filters.