| 麦克风阵列语音增强的二维FIR滤波器设计 |
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| 引用本文： | 汤永清,王毅.麦克风阵列语音增强的二维FIR滤波器设计[J].丽水学院学报,2012,34(2):19-23. |
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| 作者姓名： | 汤永清 王毅 |
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| 作者单位： | 丽水学院工学院,浙江丽水32300 |
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| 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。
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| 关 键 词： | 宽带波束 麦克风阵列 二维FIR滤波器 扇形结构 |
Design of Two-Dimensional FIR Filter Speech Enhancement in Microphone Array |
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| Tang Yongqing
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Wang Yi.Design of Two-Dimensional FIR Filter Speech Enhancement in Microphone Array[J].Journal of Lishui University,2012,34(2):19-23. |
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| Authors: | Tang Yongqing Wang Yi |
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| Institution: | (College of Engineering,Lishui University,Lishui Zhejiang 323000,China) |
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| Abstract: | 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. |
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| Keywords: | wideband beam-forming microphone array two dimensional FIR filter fan-shaped |
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