US 12,451,153 B2
Semi-adaptive beamformer
Saeed Mosayyebpour Kaskari, Irvine, CA (US); and Alireza Masnadi-Shirazi, Irvine, CA (US)
Assigned to Synaptics Incorporated, San Jose, CA (US)
Filed by Synaptics Incorporated, San Jose, CA (US)
Filed on Nov. 1, 2022, as Appl. No. 18/051,742.
Prior Publication US 2024/0153521 A1, May 9, 2024
Int. Cl. G10L 21/0272 (2013.01); G10L 21/0232 (2013.01); G10L 25/84 (2013.01); G10L 21/0216 (2013.01)
CPC G10L 21/0272 (2013.01) [G10L 21/0232 (2013.01); G10L 25/84 (2013.01); G10L 2021/02166 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of processing audio signals, comprising:
receiving an audio signal via a plurality of microphones, the audio signal including a plurality of frames each having a respective speech component and a respective noise component;
determining a plurality of first relative transfer functions (RTFs) associated with the plurality of microphones, respectively, based on a first frame of the plurality of frames; and
determining a first minimum variance distortionless response (MVDR) beamforming filter that reduces a power of the noise component, without distorting the speech component, of the first frame based on the plurality of first RTFs, a plurality of fixed RTFs associated with the plurality of microphones, and a covariance of the noise component of the first frame.