Research on separation and enhancement of speech micro-vibration from macro motion  

作　　者：CHEN Hong-kai WANG Ting-feng WU Shi-song LI Yuan-yang 陈鸿凯;王挺峰;吴世松;李远洋(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100059,China)

机构地区：[1]Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China [2]University of Chinese Academy of Sciences,Beijing 100059,China

出　　处：《Optoelectronics Letters》2020年第6期462-466,共5页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.61805234);the Key Research Program of Frontier Science,CAS (No.QYZDB-SSWSLH014);the Foundation of State Key Laboratory of Laser Interaction with Matter (No.SKLLIM1704)。

摘　　要：Based on the 1 550 nm all-fiber pulsed laser Doppler vibrometer(LDV) system independently developed by our laboratory, empirical mode decomposition(EMD) and optimally modified Log-spectral amplitude estimator(OM-LSA) algorithms are associated to separate the speech micro-vibration from the target macro motion. This combined algorithm compensates for the weakness of the EMD algorithm in denoising and the inability of the OM-LSA algorithm on signal separation, achieving separation and simultaneous acquisition of the macro motion and speech micro-vibration of a target. The experimental results indicate that using this combined algorithm, the LDV system can functionally operate within 30 m and gain a 4.21 d B promotion in the signal-to-noise ratio(SNR) relative to a traditional OM-LSA algorithm.

关 键 词：Doppler LDV LSA EMD Research on separation and enhancement of speech micro-vibration from macro motion 

分 类 号：TN912.3[电子电信—通信与信息系统]