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Acquisition and enhancement of remote voice based on laser coherent method
Lu, T.; H.-Y. Zhang; J. Guo and C.-H. Yan
2017
Source PublicationGuangxue Jingmi Gongcheng/Optics and Precision Engineering
Volume25Issue:3
AbstractAn all-fiber Laser Doppler Vibrometer (LDV) based on laser coherent method was investigated to acquire remote and high quality speech signals, combining with the Wiener speech enhancement technology. First, the heterodyne detection theory and the characteristic of fiber devices were introduced and the all-fiber LDV was established experimentally to detect the throat vibration, thus the remote voice was acquired. Whereas the direct acquisition of speech signals was prone to be disturbed by serious noise, the Wiener Filtering based on Minima Controlled Recursive Averaging (MCRA) was used to suppress the noise and improve the voice quality. The results indicate that the comprehensible speech signals within the range of 70 m can be obtained by the LDV. The speech enhancement technology can suppress the noise effectively and the Signal to Noise Ratio (SNR) was increased by 5 dB, thus the speech intelligibility was improved. This system has ability to acquire remote voice with high quality. 2017, Science Press. All right reserved.
Indexed Byei
Language中文
Document Type期刊论文
Identifierhttp://ir.ciomp.ac.cn/handle/181722/59121
Collection中科院长春光机所知识产出
Recommended Citation
GB/T 7714
Lu, T.,H.-Y. Zhang,J. Guo and C.-H. Yan. Acquisition and enhancement of remote voice based on laser coherent method[J]. Guangxue Jingmi Gongcheng/Optics and Precision Engineering,2017,25(3).
APA Lu, T.,H.-Y. Zhang,&J. Guo and C.-H. Yan.(2017).Acquisition and enhancement of remote voice based on laser coherent method.Guangxue Jingmi Gongcheng/Optics and Precision Engineering,25(3).
MLA Lu, T.,et al."Acquisition and enhancement of remote voice based on laser coherent method".Guangxue Jingmi Gongcheng/Optics and Precision Engineering 25.3(2017).
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