Patent ID: 9257132
Filing Date: 2016-02-09
CPC Classification: G10L,H04R

Claim Text:
1. A method of dominant speech extraction in a digital system, the method comprising: acquiring a primary audio signal from a primary microphone comprised in the digital system and at least one additional audio signal from at least one additional microphone comprised in the digital system, wherein the acquired audio signals comprise speech and noise; decomposing each of the acquired audio signals into a low frequency sub-band signal and a high frequency sub-band signal; applying speech suppression beamforming to the low frequency sub-band signals to generate a reference channel comprising an estimate of a level of noise in the low frequency sub-band signals; applying noise cancellation to the low frequency sub-band signal of the primary audio signal using the reference channel to generate a first signal comprising a low frequency estimate of the speech; applying noise suppression beamforming to the high frequency sub-band signals to generate a second signal comprising a high frequency estimate of the speech; and combining the first signal and the second signal to generate a full-band audio signal.