Extraction of reverberation sound using microphone array

摘要

The method includes estimating spatial coherence between a first spreading sound portion in the first microphone signal and a second spreading sound portion in the second microphone signal. The first microphone signal is captured by the first microphone and the second microphone signal is captured by a second microphone spaced from the first microphone in a known manner. The method further includes defining a linear constraint on filter coefficients of the diffuse sound filter, wherein the linear constraint is based on spatial coherence. The method also includes calculating at least one of signal statistics and noise statistics for the first microphone signal and the second microphone signal. The method also includes determining the filter coefficients of the diffuse sound filter by solving the optimization problem for at least one of the signal statistics and the noise statistics while taking linear constraints on the filter coefficients into account.