Speech Enhancement Using Compact Microphone Array and Applications in Distant Speech Acquisition  

作　　者：ZHANG Heng FU Qiang YAN Yonghong 

机构地区：[1]ThinkIT Speech Laboratory, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China

出　　处：《Chinese Journal of Electronics》2009年第3期481-486,共6页电子学报（英文版）

基　　金：This work is partially supported by the National High Technology Research and Development Program of China （863 Program）, （No.2006AA010102, No.2006AA01Z195）, MOST （973 Program）, （No.2004CB318106）, National Natural Science Foundation of China （No.10574140, No.60535030）.

摘　　要：In this paper, a novel two-element- microphone-array-based speech enhancement algorithm is proposed. This algorithm is designed to achieve better overall performance with relatively small array size. A frequency domain adaptive null-forming is used, in which adaptive noise cancelation is implemented in auditory subbands. And an OM-LSA based postfiltering stage further purifies the output. The algorithm also features interaction between the array processing and the postfilter to make the filter adaptation more robust. This approach achieves considerable improvement on Signal-to-noise ratio （SNR） and subjective quality of the desired speech. Experiments confirm the effectiveness of the proposed system.

关 键 词：Microphone array Null-forming Auditory subbands Post filtering Robust ASR 

分 类 号：TN912.35[电子电信—通信与信息系统] TN912.3[电子电信—信息与通信工程]