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
먼 소리의 획득은 항상 뜨거운 연구 주제였습니다. 소리는 진동에 의해 발생하므로 멀리 있는 소리를 측정하는 가장 좋은 방법 중 하나는 레이저 도플러 진동계(LDV)를 사용하는 것입니다. 이 레이저는 지향성이 높아 먼 곳의 소리를 포착할 수 있어 재난 구호 및 기타 상황에서 매우 실용적으로 활용됩니다. 그러나 조사된 물체 자체의 진동 특성과 표면의 반사율(또는 기타 이유)로 인해 획득된 사운드는 특정 주파수 대역의 주파수 성분이 부족하고 명백한 소음과 혼합되는 경우가 많습니다. 따라서 LDV를 사용하여 원거리 음성을 획득할 때 음성의 실제 내용을 인식하려면 획득한 음성 신호를 어떤 방식으로든 향상시켜야 합니다. 기존의 음성 향상 방법은 관찰된 음성의 다양한 유형의 저하로 인해 일반적으로 적용 가능하지 않습니다. 또한, LDV에 대한 여러 가지 음성 향상 방법이 제안되었지만 조사된 물체가 알려진 경우에만 효과적입니다. 본 논문에서는 알려지지 않은 조사 대상을 처리할 수 있는 LDV의 음성 향상 방법을 제시합니다. 제안된 방법은 잡음 감소, 피치 검출, 전력 스펙트럼 포락선 추정, 전력 스펙트럼 재구성 및 위상 추정으로 구성됩니다. 실험 결과는 알려지지 않은 조사 대상을 사용하여 획득한 음성을 향상시키는 방법의 효율성을 보여줍니다.
Chengkai CAI
Ritsumeikan University
Kenta IWAI
Ritsumeikan University
Takanobu NISHIURA
Ritsumeikan University
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부
Chengkai CAI, Kenta IWAI, Takanobu NISHIURA, "Speech Enhancement for Laser Doppler Vibrometer Dealing with Unknown Irradiated Objects" in IEICE TRANSACTIONS on Fundamentals,
vol. E106-A, no. 4, pp. 647-656, April 2023, doi: 10.1587/transfun.2022EAP1036.
Abstract: The acquisition of distant sound has always been a hot research topic. Since sound is caused by vibration, one of the best methods for measuring distant sound is to use a laser Doppler vibrometer (LDV). This laser has high directivity, that enables it to acquire sound from far away, which is of great practical use for disaster relief and other situations. However, due to the vibration characteristics of the irradiated object itself and the reflectivity of its surface (or other reasons), the acquired sound is often lacking frequency components in certain frequency bands and is mixed with obvious noise. Therefore, when using LDV to acquire distant speech, if we want to recognize the actual content of the speech, it is necessary to enhance the acquired speech signal in some way. Conventional speech enhancement methods are not generally applicable due to the various types of degradation in observed speech. Moreover, while several speech enhancement methods for LDV have been proposed, they are only effective when the irradiated object is known. In this paper, we present a speech enhancement method for LDV that can deal with unknown irradiated objects. The proposed method is composed of noise reduction, pitch detection, power spectrum envelope estimation, power spectrum reconstruction, and phase estimation. Experimental results demonstrate the effectiveness of our method for enhancing the acquired speech with unknown irradiated objects.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/transfun.2022EAP1036/_p
부
@ARTICLE{e106-a_4_647,
author={Chengkai CAI, Kenta IWAI, Takanobu NISHIURA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Speech Enhancement for Laser Doppler Vibrometer Dealing with Unknown Irradiated Objects},
year={2023},
volume={E106-A},
number={4},
pages={647-656},
abstract={The acquisition of distant sound has always been a hot research topic. Since sound is caused by vibration, one of the best methods for measuring distant sound is to use a laser Doppler vibrometer (LDV). This laser has high directivity, that enables it to acquire sound from far away, which is of great practical use for disaster relief and other situations. However, due to the vibration characteristics of the irradiated object itself and the reflectivity of its surface (or other reasons), the acquired sound is often lacking frequency components in certain frequency bands and is mixed with obvious noise. Therefore, when using LDV to acquire distant speech, if we want to recognize the actual content of the speech, it is necessary to enhance the acquired speech signal in some way. Conventional speech enhancement methods are not generally applicable due to the various types of degradation in observed speech. Moreover, while several speech enhancement methods for LDV have been proposed, they are only effective when the irradiated object is known. In this paper, we present a speech enhancement method for LDV that can deal with unknown irradiated objects. The proposed method is composed of noise reduction, pitch detection, power spectrum envelope estimation, power spectrum reconstruction, and phase estimation. Experimental results demonstrate the effectiveness of our method for enhancing the acquired speech with unknown irradiated objects.},
keywords={},
doi={10.1587/transfun.2022EAP1036},
ISSN={1745-1337},
month={April},}
부
TY - JOUR
TI - Speech Enhancement for Laser Doppler Vibrometer Dealing with Unknown Irradiated Objects
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 647
EP - 656
AU - Chengkai CAI
AU - Kenta IWAI
AU - Takanobu NISHIURA
PY - 2023
DO - 10.1587/transfun.2022EAP1036
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E106-A
IS - 4
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - April 2023
AB - The acquisition of distant sound has always been a hot research topic. Since sound is caused by vibration, one of the best methods for measuring distant sound is to use a laser Doppler vibrometer (LDV). This laser has high directivity, that enables it to acquire sound from far away, which is of great practical use for disaster relief and other situations. However, due to the vibration characteristics of the irradiated object itself and the reflectivity of its surface (or other reasons), the acquired sound is often lacking frequency components in certain frequency bands and is mixed with obvious noise. Therefore, when using LDV to acquire distant speech, if we want to recognize the actual content of the speech, it is necessary to enhance the acquired speech signal in some way. Conventional speech enhancement methods are not generally applicable due to the various types of degradation in observed speech. Moreover, while several speech enhancement methods for LDV have been proposed, they are only effective when the irradiated object is known. In this paper, we present a speech enhancement method for LDV that can deal with unknown irradiated objects. The proposed method is composed of noise reduction, pitch detection, power spectrum envelope estimation, power spectrum reconstruction, and phase estimation. Experimental results demonstrate the effectiveness of our method for enhancing the acquired speech with unknown irradiated objects.
ER -