| 雷世伟*,刘祖斌* **.基于GSMDS超指向性波束形成的室内定向语音增强方法[J].高技术通讯(中文),2024,34(12):1307~1317 |
| 基于GSMDS超指向性波束形成的室内定向语音增强方法 |
| An indoor directional speech enhancement method based on GSMDS superdirectivity beamforming |
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| DOI：10. 3772 / j. issn. 1002-0470. 2024. 12. 007 |
| 中文关键词: 室内定向语音增强； Gram-Schmidt模态波束分解与综合（GSMDS）； 超指向性； 自动增益控制； 端射线阵 |
| 英文关键词: indoor directional speech enhancement, Gram-Schmidt mode-beam decomposition and synthesis（GSMDS）, superdirectivity, automatic gain control, endfire array |
| 基金项目: |
| 作者 | 单位 | | 雷世伟* | （*浙江工业大学特种装备制造与先进加工技术教育部重点实验室杭州 310014）
（**浙江工业大学台州研究院台州 318014） | | 刘祖斌* ** | |
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| 中文摘要: |
| 针对室内定向语音增强时常出现的混响干扰、语音失真问题，本文提出一种基于Gram Schmidt模态波束分解与综合（GSMDS）的超指向性波束形成室内定向语音增强方法。首先进行基于加权预测误差的去混响前处理，然后采用GSMDS超指向性波束形成进行定向目标语音增强，再利用归一化最小均方误差自动增益控制算法对增强语音信号进行增益调节来控制响度的稳定，从而完成对目标语音的定向增强。以4阵元端射线阵进行数值仿真，结果表明，该方法相比于常规波束形成（CBF）方法增益提高了10.1dB，最高平均增益达到了22.7dB，同时端射方向的语音质量感知语音质量评价（PESQ）值相比于原接收混响语音信号PESQ值提高了0.2。在经过装修的房间内进行4阵元端射线阵实验，实验结果表明，该方法能获得较好的定向增强效果。 |
| 英文摘要: |
| Aiming at the problems of reverberation interference and poor directivity of the main lobe during indoor directional speech enhancement, an indoor directional speech enhancement method for superdirectivity beamforming based on Gram-Schmidt mode-beam decomposition and synthesis (GSMDS) is proposed. Firstly, the weighted prediction error is used for dereverberation, then GSMDS superdirectivity beamforming is used for directional target speech enhancement, and then the normalized minimum mean square error automatic gain control algorithm is used for gain adjustment of the enhanced speech signal to control the loudness stability, so as to complete directional enhancement of the target speech. Among them, the gain regulation step also compares the frequency band equalization control algorithm. The numerical simulation results show that compared with conventional beamforming（CBF） method, the gain of the proposed method is improved by 10.1dB and the maximum average gain is up to 22.7dB. Meanwhile, the perceptual evaluation of speech quality（PESQ） value of the speech quality in the endfire direction is improved by 0.2, compared with the original received reverb speech signal. The four-element endfire array experiment is carried out in a decorated room. The experimental results show that this method can obtain good directional enhancement effect in a decorated room. |
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