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
본 논문에서는 높은 음성 품질을 갖춘 거리 기반 하울링 제거기를 제안합니다. 스피커와 마이크 사이의 거리에 따라 하울링이 발생하는 특성에 착안하여 거리 정보만을 이용하는 거리 기반 하울링 제거기를 개발했습니다. 이 방법은 스피커에서 마이크로폰으로 파일럿 신호를 전송하여 거리를 추정하는 방법입니다. 각 하울링에 대한 여러 주파수 후보는 추정된 거리에서 계산되고 null이 있는 계단식 노치 필터에 의해 제거됩니다. 그러나 하울링 제거기 출력에서는 음성 품질 저하가 발생합니다. 첫 번째 원인은 진폭의 불연속적인 변화로 인해 파일럿 신호 전송의 시작과 끝 부분에 샷 노이즈가 발생하는 것입니다. 따라서 우리는 주변 소음에 강한 새로운 파일럿 신호를 개발합니다. 그러면 진폭을 작게 취하여 샷 노이즈 효과를 줄일 수 있습니다. 두 번째는 노치 필터의 저지대역이 겹쳐서 발생하는 음성 저하입니다. 이에 저지대역이 중첩되지 않도록 대역폭에 대한 조건을 도출하고, 거리에 따라 대역폭을 변경하는 적응적 대역폭 방식을 제안한다.
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Akira SOGAMI, Arata KAWAMURA, Youji IIGUNI, "Improvement of Speech Quality in Distance-Based Howling Canceller" in IEICE TRANSACTIONS on Fundamentals,
vol. E92-A, no. 4, pp. 1039-1046, April 2009, doi: 10.1587/transfun.E92.A.1039.
Abstract: In this paper, we propose a distance-based howling canceller with high speech quality. We have developed a distance-based howling canceller that uses only distance information by noticing the property that howling occurs according to the distance between a loudspeaker and a microphone. This method estimates the distance by transmitting a pilot signal from the loudspeaker to the microphone. Multiple frequency candidates for each howling are computed from the estimated distance and eliminated by cascading notch filters that have nulls at them. However degradation of speech quality occurs at the howling canceller output. The first cause is a shot noise occurrence at the beginning and end of the pilot signal transmission due to the discontinuous change of the amplitude. We thus develop a new pilot signal that is robust against ambient noises. We can then reduce the shot noise effect by taking the amplitude small. The second one is a speech degradation caused from overlapped stopbands of the notch filters. We thus derive a condition on the bandwidths so that stopbands do not overlap, and propose an adaptive bandwidth scheme which changes the bandwidth according to the distance.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/transfun.E92.A.1039/_p
부
@ARTICLE{e92-a_4_1039,
author={Akira SOGAMI, Arata KAWAMURA, Youji IIGUNI, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Improvement of Speech Quality in Distance-Based Howling Canceller},
year={2009},
volume={E92-A},
number={4},
pages={1039-1046},
abstract={In this paper, we propose a distance-based howling canceller with high speech quality. We have developed a distance-based howling canceller that uses only distance information by noticing the property that howling occurs according to the distance between a loudspeaker and a microphone. This method estimates the distance by transmitting a pilot signal from the loudspeaker to the microphone. Multiple frequency candidates for each howling are computed from the estimated distance and eliminated by cascading notch filters that have nulls at them. However degradation of speech quality occurs at the howling canceller output. The first cause is a shot noise occurrence at the beginning and end of the pilot signal transmission due to the discontinuous change of the amplitude. We thus develop a new pilot signal that is robust against ambient noises. We can then reduce the shot noise effect by taking the amplitude small. The second one is a speech degradation caused from overlapped stopbands of the notch filters. We thus derive a condition on the bandwidths so that stopbands do not overlap, and propose an adaptive bandwidth scheme which changes the bandwidth according to the distance.},
keywords={},
doi={10.1587/transfun.E92.A.1039},
ISSN={1745-1337},
month={April},}
부
TY - JOUR
TI - Improvement of Speech Quality in Distance-Based Howling Canceller
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 1039
EP - 1046
AU - Akira SOGAMI
AU - Arata KAWAMURA
AU - Youji IIGUNI
PY - 2009
DO - 10.1587/transfun.E92.A.1039
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E92-A
IS - 4
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - April 2009
AB - In this paper, we propose a distance-based howling canceller with high speech quality. We have developed a distance-based howling canceller that uses only distance information by noticing the property that howling occurs according to the distance between a loudspeaker and a microphone. This method estimates the distance by transmitting a pilot signal from the loudspeaker to the microphone. Multiple frequency candidates for each howling are computed from the estimated distance and eliminated by cascading notch filters that have nulls at them. However degradation of speech quality occurs at the howling canceller output. The first cause is a shot noise occurrence at the beginning and end of the pilot signal transmission due to the discontinuous change of the amplitude. We thus develop a new pilot signal that is robust against ambient noises. We can then reduce the shot noise effect by taking the amplitude small. The second one is a speech degradation caused from overlapped stopbands of the notch filters. We thus derive a condition on the bandwidths so that stopbands do not overlap, and propose an adaptive bandwidth scheme which changes the bandwidth according to the distance.
ER -