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arXiv 2102.09838eess.ASeess.SP
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基于复广义高斯分布的鲁棒最大似然无失真响应波束形成器

A Robust Maximum Likelihood Distortionless Response Beamformer based on a Complex Generalized Gaussian Distribution

Weixin Meng, Chengshi Zheng, Xiaodong Li

摘要:

对于多通道语音增强,这封信推导出一个强大的最大似然无失真响应波束形成器建模语音稀疏先验与复杂的广义高斯分布,我们称为CGGD-MLDR波束形成器。该波束形成器可以看作是最小功率无失真响应波束形成器及其改进形式的推广。对于窄带应用,我们还发现,所提出的波束形成器减少到最小的色散无失真响应波束形成器,这已与${{\ell}_{p}}$范数最小化。明确指出了该波束形成器提高鲁棒性的机制,实验结果表明其在PESQ改善方面具有更好的性能。

英文摘要:

For multichannel speech enhancement, this letter derives a robust maximum likelihood distortionless response beamformer by modeling speech sparse priors with a complex generalized Gaussian distribution, where we refer to as the CGGD-MLDR beamformer. The proposed beamformer can be regarded as a generalization of the minimum power distortionless response beamformer and its improved variations. For narrowband applications, we also reveal that the proposed beamformer reduces to the minimum dispersion distortionless response beamformer, which has been derived with the ${{\ell}_{p}}$-norm minimization. The mechanisms of the proposed beamformer in improving the robustness are clearly pointed out and experimental results show its better performance in PESQ improvement.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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