Patent ID: 11937054
Assignee: SYNAPTICS INCORPORATED
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 14:
15. The audio processing device of claim 12, wherein the one or more processors are further configured to:
for each microphone pair:
compute a covariance matrix using time-frequency representations of the one or more multi-source audio signals from the respective microphone pair for every frequency band;
construct a steering matrix for every frequency band based on TDOA locations for different scans of azimuth and elevation angles corresponding to the respective microphone pair;
construct a directional covariance matrix aligned across all frequency band based on the constructed steering matrix and the computed covariance matrix; and
determine a pseudo-likelihood solution that minimizes a beam power based on the constructed directional covariance matrix.