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".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Kami mencadangkan metodologi baharu anggaran DOA (arah ketibaan) yang dinamakan SPIRE (Stepwise Phase Difference REstoration) yang mampu menganggarkan arah sumber bunyi walaupun terdapat lebih daripada satu sumber dalam persekitaran yang bergema. Anggaran DOA dalam persekitaran bergema adalah sukar kerana varians arah anggaran sumber bunyi meningkat dalam persekitaran bergema. Oleh itu, kami mahu jarak antara mikrofon menjadi panjang. Walau bagaimanapun, disebabkan masalah aliasing spatial, jarak tidak boleh lebih panjang daripada separuh panjang gelombang frekuensi maksimum sumber. Prestasi anggaran DOA bagi SPIRE tidak dihadkan oleh masalah aliasing spatial. Ciri utama SPIRE ialah pemulihan perbezaan fasa pasangan mikrofon (M1) dengan menggunakan perbezaan fasa pasangan mikrofon lain (M2) dengan syarat jarak antara mikrofon M1 lebih panjang daripada jarak antara mikrofon M2. Proses pemulihan ini membolehkan pengurangan varians anggaran arah sumber bunyi dan boleh mengurangkan masalah aliasing spatial yang berlaku dengan perbezaan fasa M1 menggunakan anggaran arah mikrofon M2. Keputusan eksperimen dalam persekitaran bergema (masa dengung = kira-kira 300 ms) menunjukkan bahawa walaupun terdapat berbilang sumber, kaedah yang dicadangkan boleh menganggarkan arah sumber dengan lebih tepat daripada kaedah konvensional. Di samping itu, prestasi anggaran DOA SPIRE dengan panjang tatasusunan 0.2 m ditunjukkan hampir setara dengan GCC-PHAT dengan panjang tatasusunan 0.5 m. SPIRE boleh melaksanakan anggaran DOA dengan susunan mikrofon yang lebih kecil daripada GCC-PHAT. Dari sudut pandangan saiz perkakasan dan masalah koheren, panjang tatasusunan diperlukan sekecil mungkin. Ciri SPIRE ini adalah lebih baik.
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Salinan
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
Salinan
@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},}
Salinan
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 -