Open AccessPhase Differences Based Coherence Filter for Dual-Microphone System
Author(s) -
Quan Trong The
Publication year - 2020
Publication title -
international journal of recent technology and engineering
Language(s) - English
Resource type - Journals
ISSN - 2277-3878
DOI - 10.35940/ijrte.e6150.018520
Subject(s) - microphone , computer science , dual (grammatical number) , speech enhancement , noise canceling microphone , speech recognition , noise reduction , noise (video) , coherence (philosophical gambling strategy) , filter (signal processing) , algorithm , microphone array , artificial intelligence , mathematics , computer vision , telecommunications , art , statistics , literature , sound pressure , image (mathematics)
This paper proposes a dual-microphone coherence filter, which based on phase difference of two noisy signals. This method passes, without dirtortion target speaker. In real noisy environment, it’s difficult to get exactly information of condition noise field, especially in complex environment. Therefore a post-filtering, which is a function depends on speech presence probability, is suitable for compact dual-microphone and is adapted in the author's approach. The performance of suggested algorithm proved the stability and efficiency of the algorithm. This approach allows increasing performance of speech enhancement in term of signal-to-noise ratio and the amount of noise reduction. The author intends to continue using phase differences as conditions for different algorithms speech quality improvement under various noise conditions.