Real-Time Distant Sound Source Suppression Using Spectral Phase Difference

Kazuhiro MURAKAMI
Arata KAWAMURA
Yoh-ichi FUJISAKA
Nobuhiko HIRUMA
Youji IIGUNI

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences      No.3    pp.604-612
Publication Date: 2021/03/01
Publicized: 2020/09/24
Online ISSN: 1745-1337
DOI: 10.1587/transfun.2020EAP1031
Type of Manuscript: PAPER
Category: Engineering Acoustics
Keyword: 
blind source separation,  two-channel,  phase difference,  single voice activity,  real-time,  

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Summary: 
In this paper, we propose a real-time BSS (Blind Source Separation) system with two microphones that extracts only desired sound sources. Under the assumption that the desired sound sources are close to the microphones, the proposed BSS system suppresses distant sound sources as undesired sound sources. We previously developed a BSS system that can estimate the distance from a microphone to a sound source and suppress distant sound sources, but it was not a real-time processing system. The proposed BSS system is a real-time version of our previous BSS system. To develop the proposed BSS system, we simplify some BSS procedures of the previous system. Simulation results showed that the proposed system can effectively suppress the distant source signals in real-time and has almost the same capability as the previous system.