Fast multichannel nonnegative matrix factorization with directivity-aware jointly-diagonalizable spatial covariance matrices for blind source separation

K Sekiguchi, Y Bando, AA Nugraha… - … on Audio, Speech …, 2020 - ieeexplore.ieee.org
This article describes a computationally-efficient blind source separation (BSS) method
based on the independence, low-rankness, and directivity of the sources. A typical approach …

Unsupervised speech enhancement based on multichannel NMF-informed beamforming for noise-robust automatic speech recognition

K Shimada, Y Bando, M Mimura… - … on Audio, Speech …, 2019 - ieeexplore.ieee.org
This paper describes multichannel speech enhancement for improving automatic speech
recognition (ASR) in noisy environments. Recently, the minimum variance distortionless …

Signal compaction using polynomial EVD for spherical array processing with applications

VW Neo, C Evers, S Weiss… - IEEE/ACM Transactions …, 2023 - ieeexplore.ieee.org
Multi-channel signals captured by spatially separated sensors often contain a high level of
data redundancy. A compact signal representation enables more efficient storage and …

A joint diagonalization based efficient approach to underdetermined blind audio source separation using the multichannel Wiener filter

N Ito, R Ikeshita, H Sawada… - IEEE/ACM Transactions …, 2021 - ieeexplore.ieee.org
Blind source separation (BSS) of audio signals aims to separate original source signals from
their mixtures recorded by microphones. The applications include automatic speech …

Rotor noise-aware noise covariance matrix estimation for unmanned aerial vehicle audition

B Yen, Y Li, Y Hioka - IEEE/ACM transactions on audio, speech …, 2023 - ieeexplore.ieee.org
A noise covariance matrix (NCM) estimation method for unmanned aerial vehicle (UAV)
audition is proposed with rotor noise reduction as its primary focus. The proposed NCM …

Block coordinate descent algorithms for auxiliary-function-based independent vector extraction

R Ikeshita, T Nakatani, S Araki - IEEE Transactions on Signal …, 2021 - ieeexplore.ieee.org
In this paper, we address the problem of extracting all super-Gaussian source signals from a
linear mixture in which (i) the number of super-Gaussian sources K is less than that of …

[HTML][HTML] Spherical-harmonics-based sound field decomposition and multichannel nmf for sound source separation

M Pezzoli, J Carabias-Orti, P Vera-Candeas… - Applied Acoustics, 2024 - Elsevier
In the context of source separation solutions for virtual reality applications, several
techniques in the spherical harmonics domain have been proposed in the literature. The …

Minimum-volume multichannel nonnegative matrix factorization for blind audio source separation

J Wang, S Guan, S Liu, XL Zhang - IEEE/ACM Transactions on …, 2021 - ieeexplore.ieee.org
Multichannel blind audio source separation aims to recover the latent sources from their
multichannel mixtures without supervised information. One state-of-the-art blind audio …

Time-frequency-bin-wise linear combination of beamformers for distortionless signal enhancement

K Yamaoka, N Ono, S Makino - IEEE/ACM Transactions on …, 2021 - ieeexplore.ieee.org
In this paper, we address signal enhancement in underdetermined situations and propose
new beamforming algorithms. Beamforming in (over) determined situations can successfully …

Autoregressive fast multichannel nonnegative matrix factorization for joint blind source separation and dereverberation

K Sekiguchi, Y Bando, AA Nugraha… - ICASSP 2021-2021 …, 2021 - ieeexplore.ieee.org
This paper describes a joint blind source separation and dereverberation method that works
adaptively and efficiently in a reverberant noisy environment. The modern approach to blind …