Spatially based adaptive filter for a double talk recovery method

Abstract

A method when executed causes data processing hardware to perform operations including receiving a first audio signal and a second audio signal simultaneously at an adaptive filter of an acoustic echo canceler (AEC). The first audio signal corresponds to a third-party source and the second audio signal corresponds to a target source. The operations include estimating an echo signal present in the second audio signal based on the simultaneous first audio signal and the second audio signal received at the adaptive filter and estimating an echo signal directivity of the estimated echo signal, determining a target directivity of the target source, and comparing the estimated echo signal directivity with the determined target directivity. The operations include detecting a divergence of an estimated echo signal direction toward a target source direction to determine AEC divergence due to a double talk scenario and resetting the adaptive filter and the acoustic echo canceler.