Patent ID: 9437181
Filing Date: 2016-09-06
CPC Classification: G10K,G10L,H04R

Claim Text:
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; calculating a direction error between the calculated phase difference and a target slope, 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 processing the first and second audio signals based on the calculated direction error to determine if the first and second audio signals correspond to audio originating from the region of interest and to suppress off-axis audio relative to the positions of the first and second microphones and the region of interest and further comprising adjusting the 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.