Patent ID: 9301048
Filing Date: 2016-03-29
CPC Classification: G10K,G10L,H04B,H04M,H04R

Claim Text:
1. A signal processing method operating to generate a target blocked signal in which a target signal is suppressed by processing a mixed signal with a first set of adaptive filters, said mixed signal being received by a plurality of microphones and containing at least an interfering signal, a target signal and a noise, generate a pseudo interfering signal by processing said target blocked signal as a reference signal with a second set of adaptive filters, generate a target enhanced signal in which the target signal is enhanced by processing said mixed signal with a set of fixed filters, and remove the interfering signal by subtracting said pseudo interfering signal from said target enhanced signal, said method comprising: estimating a noise contained in said mixed signal to determine an estimated noise; detecting a target signal contained in said mixed signal using a value that corrected similarity with said reference signal and said mixed signal by said estimated noise to determine a value corresponding to a reliability in the detection; and adaptively controlling the degree of coefficient update for said first and second sets of adaptive filters according to said value corresponding to the reliability.