Patent ID: 9697848
Date: 2017-07-04
CPC Classifications: G10L

Claim:
1. A noise suppression device comprising: a memory; and a processor coupled to the memory and configured to generate a first input signal and a second input signal by converting a first sound signal and a second sound signal from time domain to frequency domain, the first sound signal and the second sound signal being collected by a first microphone and a second microphone, respectively, based on the first input signal and the second input signal, determine a stationary noise model, calculate a signal to noise ratio (SNR) based on the first input signal and the stationary noise model, based on the SNR, set a range of phase difference to suppress the first input signal so that the range of phase difference to suppress the first input signal under a condition that the SNR is lower than a first value is set narrower than the range of phase difference under a condition that the SNR is higher than the first value, calculate a phase difference between the first input signal and the second input signal, and when the phase difference is within the range of phase difference, suppress the first input signal.