Waveform Estimation of Sound Sources in a Reverberant Environment with Inverse Filters

Kiyohito FUJII; Masato ABE; Toshio SONE

Waveform Estimation of Sound Sources in a Reverberant Environment with Inverse Filters

Kiyohito FUJII, Masato ABE, Toshio SONE

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This paper proposes a method to estimate the waveform of a specified sound source in a noisy and reverberant environment using a sensor array. Previously, we proposed an iterative method to estimate the waveform. However, in this method the effect of reflection sound reduces to 1/M, where M is the number of microphones. Therefore, to solve the reverberation problem, we propose a new method using inverse filters of the transfer functions from the sound sources to each microphone. First, the transfer function from each sound source to each microphone is measured by the cross-spectrum technique and each inverse filter is calculated by the QR method. Then the initially estimated waveform of a sound source is the averaged signal of the inverse filter outputs. Since this waveform still contains the effects of the other sound sources, the iterative technique is adopted to estimate the waveform more precisely, reducing the effects of the other sound and the reflection sound. Some computer simulations and experiments were carried out. The results show the effectiveness of our method.

Publication: IEICE TRANSACTIONS on Fundamentals Vol.E75-A No.11 pp.1484-1492

Publication Date: 1992/11/25

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Type of Manuscript: Special Section PAPER (Special Section on Acoustic System Modeling and Signal Processing)

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Kiyohito FUJII, Masato ABE, Toshio SONE, "Waveform Estimation of Sound Sources in a Reverberant Environment with Inverse Filters" in IEICE TRANSACTIONS on Fundamentals, vol. E75-A, no. 11, pp. 1484-1492, November 1992, doi: .
Abstract: This paper proposes a method to estimate the waveform of a specified sound source in a noisy and reverberant environment using a sensor array. Previously, we proposed an iterative method to estimate the waveform. However, in this method the effect of reflection sound reduces to 1/M, where M is the number of microphones. Therefore, to solve the reverberation problem, we propose a new method using inverse filters of the transfer functions from the sound sources to each microphone. First, the transfer function from each sound source to each microphone is measured by the cross-spectrum technique and each inverse filter is calculated by the QR method. Then the initially estimated waveform of a sound source is the averaged signal of the inverse filter outputs. Since this waveform still contains the effects of the other sound sources, the iterative technique is adopted to estimate the waveform more precisely, reducing the effects of the other sound and the reflection sound. Some computer simulations and experiments were carried out. The results show the effectiveness of our method.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/e75-a_11_1484/_p

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@ARTICLE{e75-a_11_1484,
author={Kiyohito FUJII, Masato ABE, Toshio SONE, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Waveform Estimation of Sound Sources in a Reverberant Environment with Inverse Filters},
year={1992},
volume={E75-A},
number={11},
pages={1484-1492},
abstract={This paper proposes a method to estimate the waveform of a specified sound source in a noisy and reverberant environment using a sensor array. Previously, we proposed an iterative method to estimate the waveform. However, in this method the effect of reflection sound reduces to 1/M, where M is the number of microphones. Therefore, to solve the reverberation problem, we propose a new method using inverse filters of the transfer functions from the sound sources to each microphone. First, the transfer function from each sound source to each microphone is measured by the cross-spectrum technique and each inverse filter is calculated by the QR method. Then the initially estimated waveform of a sound source is the averaged signal of the inverse filter outputs. Since this waveform still contains the effects of the other sound sources, the iterative technique is adopted to estimate the waveform more precisely, reducing the effects of the other sound and the reflection sound. Some computer simulations and experiments were carried out. The results show the effectiveness of our method.},
keywords={},
doi={},
ISSN={},
month={November},}

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TY - JOUR
TI - Waveform Estimation of Sound Sources in a Reverberant Environment with Inverse Filters
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 1484
EP - 1492
AU - Kiyohito FUJII
AU - Masato ABE
AU - Toshio SONE
PY - 1992
DO -
JO - IEICE TRANSACTIONS on Fundamentals
SN -
VL - E75-A
IS - 11
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - November 1992
AB - This paper proposes a method to estimate the waveform of a specified sound source in a noisy and reverberant environment using a sensor array. Previously, we proposed an iterative method to estimate the waveform. However, in this method the effect of reflection sound reduces to 1/M, where M is the number of microphones. Therefore, to solve the reverberation problem, we propose a new method using inverse filters of the transfer functions from the sound sources to each microphone. First, the transfer function from each sound source to each microphone is measured by the cross-spectrum technique and each inverse filter is calculated by the QR method. Then the initially estimated waveform of a sound source is the averaged signal of the inverse filter outputs. Since this waveform still contains the effects of the other sound sources, the iterative technique is adopted to estimate the waveform more precisely, reducing the effects of the other sound and the reflection sound. Some computer simulations and experiments were carried out. The results show the effectiveness of our method.
ER -