Dominant speech extraction in the presence of diffused and directional noise sources

摘要

A method of dominant speech extraction is provided that includes acquiring a primary audio signal from a microphone and at least one additional audio signal from at least one additional microphone, wherein the acquired audio signals include speech and noise, decomposing each acquired audio signal 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 having an estimate 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 having a low frequency estimate of the speech, applying noise suppression beamforming to the high frequency sub-band signals to generate a second signal having a high frequency estimate of the speech, and combining the first and second signals to generate a full-band audio signal.

主权项

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.