| 基于传声器阵列超增益波束形成的语音增强--频域方法 |
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| 引用本文： | 李博,杨益新.基于传声器阵列超增益波束形成的语音增强--频域方法[J].电声技术,2006(1):44-47. |
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| 作者姓名： | 李博 杨益新 |
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| 作者单位： | 西北工业大学,声学工程研究所,陕西,西安,710072 |
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| 摘 要： | 提出了一种在频域实现的基于传声器阵列超增益波束形成的语音增强方法。该方法利用小孔径线列阵端射方向具有超增益的特性,针对均匀噪声场,设计出相应的超增益权,形成超增益波束。基于超增益波束形成的输出相对常规处理,可大幅度提高信噪比。仿真了间距为0.05m的5元均匀线性传声器阵列接收到的端射方向带噪线性调频信号和语音信号,并进行超增益处理,获得12dB左右的阵增益,从而表明超增益传声器阵列具有优越的性能。
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| 关 键 词： | 传声器阵列 超增益 波束形成 语音增强 频域 |
| 文章编号： | 1002-8684(2006)01-0044-04 |
| 收稿时间： | 2005-07-06 |
| 修稿时间： | 2005年7月6日 |
Speech Enhancement Based on Super Gain Beamforming of Microphone Array --Frequency Domain Approach |
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| LI Bo,YANG Yi-xin.Speech Enhancement Based on Super Gain Beamforming of Microphone Array --Frequency Domain Approach[J].Audio Engineering,2006(1):44-47. |
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| Authors: | LI Bo YANG Yi-xin |
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| Abstract: | A speech enhancement approach based on super gain beamforming of microphone array in frequency domain is proposed in this paper. The super gain property of small aperture linear microphone array at endfire direction is used to design beamforming weights for spherical isotropic noise field. The array output from super gain beamformer can significantly improve the signal-to-noise ratio (SNR). Simulation experiments were carried out for a five element superdirective microphone array with 0.05 m inter-element spacing. The array gain about 12 dB was obtained for linear frequency modulation signal and speech signal with additive noise, which showed the superiority of super gain microphone array. |
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| Keywords: | microphone array super gain beamforming speech enhancement frequency domain |
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