The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Nous proposons une nouvelle méthodologie d'estimation de DOA (direction d'arrivée) nommée SPIRE (Stepwise Phase dIfference REstoration) qui est capable d'estimer les directions d'une source sonore même s'il y a plus d'une source dans un environnement réverbérant. L'estimation de la DOA dans les environnements réverbérants est difficile car la variance de la direction d'une source sonore estimée augmente dans les environnements réverbérants. Nous souhaitons donc que la distance entre les microphones soit longue. Cependant, en raison du problème de repliement spatial, la distance ne peut pas être supérieure à la moitié de la longueur d'onde de la fréquence maximale d'une source. Les performances d'estimation DOA de SPIRE ne sont pas limitées par le problème d'alias spatial. La caractéristique majeure de SPIRE est la restauration de la différence de phase d'une paire de microphones (M1) en utilisant la différence de phase d'une autre paire de microphones (M2) à condition que la distance entre les microphones M1 soit plus longue que la distance entre les microphones M2. Ce processus de restauration permet de réduire la variance d'une direction de source sonore estimée et peut atténuer le problème de repliement spatial qui se produit avec la différence de phase M1 à l'aide d'une estimation de direction des microphones M2. Les résultats expérimentaux dans un environnement réverbérant (temps de réverbération = environ 300 ms) indiquent que même lorsqu'il existe plusieurs sources, la méthode proposée peut estimer la direction de la source avec plus de précision que les méthodes conventionnelles. De plus, les performances d'estimation DOA de SPIRE avec une longueur de réseau de 0.2 m se révèlent presque équivalentes à celles de GCC-PHAT avec une longueur de réseau de 0.5 m. SPIRE peut exécuter l'estimation DOA avec un réseau de microphones plus petit que GCC-PHAT. Du point de vue de la taille du matériel et du problème de cohérence, la longueur du tableau doit être aussi petite que possible. Cette fonctionnalité de SPIRE est préférable.
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Masahito TOGAMI, Yasunari OBUCHI, "Stepwise Phase Difference Restoration Method for DOA Estimation of Multiple Sources" in IEICE TRANSACTIONS on Fundamentals,
vol. E91-A, no. 11, pp. 3269-3281, November 2008, doi: 10.1093/ietfec/e91-a.11.3269.
Abstract: We propose a new methodology of DOA (direction of arrival) estimation named SPIRE (Stepwise Phase dIfference REstoration) that is able to estimate sound source directions even if there is more than one source in a reverberant environment. DOA estimation in reverberant environments is difficult because the variance of the direction of an estimated sound source increases in reverberant environments. Therefore, we want the distance between microphones to be long. However, because of the spatial aliasing problem, the distance cannot be longer than half the wavelength of the maximum frequency of a source. DOA estimation performance of SPIRE is not limited by the spatial aliasing problem. The major feature of SPIRE is restoration of the phase difference of a microphone pair (M1) by using the phase difference of another microphone pair (M2) under the condition that the distance between the M1 microphones is longer than the distance between the M2 microphones. This restoration process enables the reduction of the variance of an estimated sound source direction and can alleviates the spatial aliasing problem that occurs with the M1 phase difference using direction estimation of the M2 microphones. The experimental results in a reverberant environment (reverberation time = about 300 ms) indicate that even when there are multiple sources, the proposed method can estimate the source direction more accurately than conventional methods. In addition, DOA estimation performance of SPIRE with the array length 0.2 m is shown to be almost equivalent to that of GCC-PHAT with the array length 0.5 m. SPIRE can executes DOA estimation with a smaller microphone array than GCC-PHAT. From the viewpoint of the hardware size and coherence problem, the array length is required to be as small as possible. This feature of SPIRE is preferable.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1093/ietfec/e91-a.11.3269/_p
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@ARTICLE{e91-a_11_3269,
author={Masahito TOGAMI, Yasunari OBUCHI, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Stepwise Phase Difference Restoration Method for DOA Estimation of Multiple Sources},
year={2008},
volume={E91-A},
number={11},
pages={3269-3281},
abstract={We propose a new methodology of DOA (direction of arrival) estimation named SPIRE (Stepwise Phase dIfference REstoration) that is able to estimate sound source directions even if there is more than one source in a reverberant environment. DOA estimation in reverberant environments is difficult because the variance of the direction of an estimated sound source increases in reverberant environments. Therefore, we want the distance between microphones to be long. However, because of the spatial aliasing problem, the distance cannot be longer than half the wavelength of the maximum frequency of a source. DOA estimation performance of SPIRE is not limited by the spatial aliasing problem. The major feature of SPIRE is restoration of the phase difference of a microphone pair (M1) by using the phase difference of another microphone pair (M2) under the condition that the distance between the M1 microphones is longer than the distance between the M2 microphones. This restoration process enables the reduction of the variance of an estimated sound source direction and can alleviates the spatial aliasing problem that occurs with the M1 phase difference using direction estimation of the M2 microphones. The experimental results in a reverberant environment (reverberation time = about 300 ms) indicate that even when there are multiple sources, the proposed method can estimate the source direction more accurately than conventional methods. In addition, DOA estimation performance of SPIRE with the array length 0.2 m is shown to be almost equivalent to that of GCC-PHAT with the array length 0.5 m. SPIRE can executes DOA estimation with a smaller microphone array than GCC-PHAT. From the viewpoint of the hardware size and coherence problem, the array length is required to be as small as possible. This feature of SPIRE is preferable.},
keywords={},
doi={10.1093/ietfec/e91-a.11.3269},
ISSN={1745-1337},
month={November},}
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TY - JOUR
TI - Stepwise Phase Difference Restoration Method for DOA Estimation of Multiple Sources
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 3269
EP - 3281
AU - Masahito TOGAMI
AU - Yasunari OBUCHI
PY - 2008
DO - 10.1093/ietfec/e91-a.11.3269
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E91-A
IS - 11
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - November 2008
AB - We propose a new methodology of DOA (direction of arrival) estimation named SPIRE (Stepwise Phase dIfference REstoration) that is able to estimate sound source directions even if there is more than one source in a reverberant environment. DOA estimation in reverberant environments is difficult because the variance of the direction of an estimated sound source increases in reverberant environments. Therefore, we want the distance between microphones to be long. However, because of the spatial aliasing problem, the distance cannot be longer than half the wavelength of the maximum frequency of a source. DOA estimation performance of SPIRE is not limited by the spatial aliasing problem. The major feature of SPIRE is restoration of the phase difference of a microphone pair (M1) by using the phase difference of another microphone pair (M2) under the condition that the distance between the M1 microphones is longer than the distance between the M2 microphones. This restoration process enables the reduction of the variance of an estimated sound source direction and can alleviates the spatial aliasing problem that occurs with the M1 phase difference using direction estimation of the M2 microphones. The experimental results in a reverberant environment (reverberation time = about 300 ms) indicate that even when there are multiple sources, the proposed method can estimate the source direction more accurately than conventional methods. In addition, DOA estimation performance of SPIRE with the array length 0.2 m is shown to be almost equivalent to that of GCC-PHAT with the array length 0.5 m. SPIRE can executes DOA estimation with a smaller microphone array than GCC-PHAT. From the viewpoint of the hardware size and coherence problem, the array length is required to be as small as possible. This feature of SPIRE is preferable.
ER -