METHOD FOR SPATIAL FILTERING OF AT LEAST ONE SOUND SIGNAL, COMPUTER READABLE STORAGE MEDIUM AND SPATIAL FILTERING SYSTEM BASED ON CROSS-PATTERN COHERENCE

摘要

Method for spatial filtering of at least one sound signal (M₀; W(n) ) includes the steps of: generation of a first, a second and a third captured sound signal by capturing of the respective sound signals by microphones characterized by directivity patterns of different orders; performing a short-time Fourier transformation of the captured, sound signal s; measuring a cross-pattern correlation or a cross-pattern coherence towards a desired direction (φ); calculation of a gain factor (G +) using a cross -pattern correlation based on time-averaged correlation or coherence between the first captured sound signal and the second captured sound signal; and applying the gain factor (G +) to the corresponding time-frequency positions in the third captured sound, signal (2.3; M0; W(n) ). Independent patent claims also for a system and computer readable storage medium.