An Improved Diagonal Loading-Based Minimum Variance Distortionless Response Beamformer

Quan Trong The

2022

Abstract

The MVDR beamformer has more prominent solution and much better noise reduction and interference suppression capability than the conventional beamforming method, which required that the associated microphone array steering vector to sound source is accurately known. However, whenever the a priori information about the direction of arrival of the interest signal is not imprecise, microphone mismatch or different microphone sensitivities; the evaluation of MVDR beamformer is often degraded, thus speech distortion, which decreases the speech quality, is unavoidable. For mitigating the drawbacks, diagonal loading has been imposed to enhance MVDR’s performance in terms of improving the signal-to-noise ratio (SNR) and removing background noise. So diagonal loading has been a common widely used method to enhance the robustness of MVDR beamformer. The inherent problem of diagonal loading is the choice of optimal parameter l to increase the effective working of diagonal loading in complex acoustical situation. In this correspondence, the author presented a method for calculating the necessary parameter l to improve the speech enhancement in dual-microphone system. The illustrated experiment has proven the capability of considered technique via a numerical example.

Paper Citation

in Harvard Style

Trong The Q. (2022). An Improved Diagonal Loading-Based Minimum Variance Distortionless Response Beamformer. In Proceedings of the 5th Workshop for Young Scientists in Computer Science and Software Engineering - Volume 1: CS&SE@SW; ISBN 978-989-758-653-8, SciTePress, pages 19-26. DOI: 10.5220/0012009100003561

in Bibtex Style

@conference{cs&se@sw22,
author={Quan Trong The},
title={An Improved Diagonal Loading-Based Minimum Variance Distortionless Response Beamformer},
booktitle={Proceedings of the 5th Workshop for Young Scientists in Computer Science and Software Engineering - Volume 1: CS&SE@SW},
year={2022},
pages={19-26},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0012009100003561},
isbn={978-989-758-653-8},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 5th Workshop for Young Scientists in Computer Science and Software Engineering - Volume 1: CS&SE@SW
TI - An Improved Diagonal Loading-Based Minimum Variance Distortionless Response Beamformer
SN - 978-989-758-653-8
AU - Trong The Q.
PY - 2022
SP - 19
EP - 26
DO - 10.5220/0012009100003561
PB - SciTePress