麦克风阵列语音增强的二维FIR滤波器设计  

Design of Two-Dimensional FIR Filter Speech Enhancement in Microphone Array

作　　者：汤永清[1] 王毅[1] 

机构地区：[1]丽水学院工学院,浙江丽水323000

出　　处：《丽水学院学报》2012年第2期19-23,共5页Journal of Lishui University

摘　　要：当不能准确估计声源个数以及波达方向时,基于传统波束形成的语音增强的性能大为降低。根据手持通信设备的特点,提出一种利用麦克风阵列进行噪声及干扰抑制的方法。该方法采用具有扇形结构通带的二维FIR滤波器,利用楔形过渡带,实现指定角度内宽带语音的波束形成,用来抑制期望主瓣外的噪声和干扰。仿真实验表明了该滤波器的有效性。The performance of speech enhancement based on traditional beam-forming is degraded greatly when directivity of arrival of sound and number of sound are not been estimated precisely. In this paper, according to characteristics of hand-communicated equipment, a method on suppression of environmental noise and disturbance is provided. Beam-forming on speech wideband in desired angle is realized by designing a two- dimensional FIR filter which has fan structure pass-band and wedge-shaped transition-band. The filter can suppress noise and disturbance out of main-lobe desired. The simulation demonstrated that the filter designed is effective.

关 键 词：宽带波束 麦克风阵列 二维FIR滤波器 扇形结构 

分 类 号：TN911.7[电子电信—通信与信息系统]