Patent ID: 9173025
Filing Date: 2015-10-27
Classification: G10L,H04R

Abstract:
1. A system for processing audio input signals, comprising: an input processor to accept a plurality of sampled audio input signals to form a mixed-down signal in the sample or frequency domain, and further to form a mixed-down banded instantaneous frequency domain amplitude metric of the input signals for a plurality of frequency bands, at least 90% of the bands having contribution from two or more frequency bins; a banded spatial feature estimator to estimate banded spatial features from the plurality of sampled input signals; a gain calculator to calculate a set of banded suppression probability indicators including a banded out-of-location signal probability indicator determined using two or more of the banded spatial features, and a banded noise suppression probability indicator, expressible for each frequency band as a noise suppression gain and determined using a banded estimate of noise spectral content based on the mixed-down banded instantaneous frequency domain amplitude metric of the input signals, the gain calculator further to combine the set of probability indicators to calculate a combined gain for each band of the plurality of frequency bands; and a suppressor to apply an interpolated final gain determined from the combined gains of the plurality of frequency bands to carry out suppression on the mixed-down signal to form suppressed signal data.