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Speech improvement in noisy reverberant environments using virtual microphones along with proposed array geometry

Authors :
Mohammad Ebrahim Sadeghi
Hamid Sheikhzadeh
Mohammad Javad Emadi
Source :
EURASIP Journal on Advances in Signal Processing, Vol 2022, Iss 1, Pp 1-20 (2022)
Publication Year :
2022
Publisher :
SpringerOpen, 2022.

Abstract

Abstract This paper proposes a novel approach for improving the speech of a single speaker in noisy reverberant environments. The proposed approach is based on using a beamformer with a large number of virtual microphones with the suggested arrangement on an open sphere. Our method takes into account virtual microphone signal synthesizing using the non-parametric sound field reproduction in the spherical harmonics domain and the popular weighted prediction error method. We obtain entirely accurate beam steering towards a known source location with more directivity. The suggested approach is proven to perform effectively not just in boosting the directivity factor but also in terms of improving speech quality as measured by subjective metrics like the PESQ. In comparison to current research in the area of speech enhancement by beamformer, our experiments reveal more noise and reverberation suppression as well as improved quality in the enhanced speech samples due to the usage of virtual beam rotation in the fixed beamformer. Text for this section.

Details

Language :
English
ISSN :
16876180
Volume :
2022
Issue :
1
Database :
Directory of Open Access Journals
Journal :
EURASIP Journal on Advances in Signal Processing
Publication Type :
Academic Journal
Accession number :
edsdoj.4c45880c09ac4660ab55e75cea8565fe
Document Type :
article
Full Text :
https://doi.org/10.1186/s13634-022-00951-7