Multisensory speech enhancement using lower‐frequency components from bone‐conducted speech
Multisensory speech enhancement using lower‐frequency components from bone‐conducted speech
复制标题
使用骨传导语音的低频分量进行多感官语音增强
DOI：
10.1002/tee.22988
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发表时间：
2019
影响因子：
1
通讯作者：
T. Shimamura
中科院分区：
文献类型：
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作者：
M. S. Rahman;Atanu Saha;T. Shimamura
在这篇文章中，我们提出了一种多感官语音增强技术，通过抑制语音信号中的低频带噪声。语音通常会受到颜色噪声的破坏，如汽车和多说话者的串音噪声，这些噪声主要影响语音信号的低频区域。我们提出了一种利用骨传导（BC）语音进行降噪的多感官方法。由于BC语音是由穿过声道壁和头骨的振动引起的，因此它对环境条件具有鲁棒性。不幸的是，BC语音的可懂度较差，因为它缺乏更高频率的成分。然而，BC语音的低频区域是完全可理解的。当正常的空气传导（AC）语音被低频带噪声破坏时，可以通过用BC语音的低频区域替换嘈杂AC语音的低频区域来容易地抑制它。由于所提出的方法不需要任何噪声估计，因此可以避免由于传统增强技术的不完善的噪声估计而引入的失真。评估结果表明，即使在非常低的信噪比（SNR）条件下，该方法也可以有效地用于抑制低频带噪声。2019年日本电气工程师协会由John Wiley & Sons公司出版
In this article, we present a multisensory speech enhancement technique by suppressing low‐frequency band noise from the speech signal. Speech is often corrupted by color noises like car and multi‐talker babble noise that affect mostly the low‐frequency region of the speech signal. We propose a multisensory approach for noise reduction by utilizing bone‐conducted (BC) speech. Since BC speech is caused by the vibrations that travel through the vocal tract wall and skull bone, it is robust against ambient conditions. Unfortunately, BC speech suffers from intelligibility because it lacks higher‐frequency components. However, the low‐frequency region of BC speech is completely intelligible. When the normal air‐conducted (AC) speech gets corrupted by low‐frequency band noise, it can be readily suppressed by replacing the low‐frequency region of noisy AC speech with that of BC speech. Because the proposed method does not require any noise estimation, it is thus possible to avoid distortion introduced due to imperfect noise estimation by the traditional enhancement techniques. Evaluation results show that the method can be effectively used for suppressing low‐frequency band noise even under very low signal to noise ratio (SNR) conditions. © 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.