Patent ID: 8818800
Filing Date: 2014-08-26
Classification: G10K,G10L,H04R

Abstract:
1. A method of off-axis audio suppression in an audio environment comprising: receiving first and second audio signals from first and second microphones positioned within the audio environment; calculating a phase difference between the first and second audio signals; adjusting a target slope based on the calculated phase difference between the first and second audio signals to adapt the region of interest based on a location of a human speaker within the audio environment, the target slope defining a desired phase difference between signals from the first and second microphones corresponding to audio originating from a region of interest, and where adjusting the target slope includes: calculating a direction error between the calculated phase difference and the target slope; and processing the first and second audio signals based on the calculated direction error to suppress off-axis audio relative to the positions of the first and second microphones and the region of interest.