Direct-to-Reverberant Ratio estimation using a null-steered beamformer
Direct-to-Reverberant Ratio estimation using a null-steered beamformer
复制标题
使用零点引导波束形成器进行直接混响比估计
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
J. Skoglund
中科院分区：
文献类型：
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作者：
James Eaton;Alastair H. Moore;P. Naylor;J. Skoglund
混响会影响在房间中录制的远距离语音的质量和可懂度。直达混响比（DRR）是用于评估声学配置的有用度量，并且可以用于通知去混响算法。我们描述了一种新的DRR估计算法，适用于用两个或更多个麦克风记录的信号，如移动的通信设备和笔记本电脑。该方法使用调零波束形成器。在仿真中，所提出的方法产生准确的DRR估计在±4 dB范围内的各种房间大小，混响时间和源-接收器的距离。它还表明，所提出的方法是更强大的背景噪声比基线的方法。在-5至5dB的区域中获得最佳估计精度，这是便携式设备的相关范围。
Reverberation affects the quality and intelligibility of distant speech recorded in a room. Direct-to-Reverberant Ratio (DRR) is a useful measure for assessing the acoustic configuration and can be used to inform dereverberation algorithms. We describe a novel DRR estimation algorithm applicable where the signal was recorded with two or more microphones, such as mobile communications devices and laptops. The method uses a null-steered beamformer. In simulations the proposed method yields accurate DRR estimates to within ±4 dB across a wide variety of room sizes, reverberation times and source-receiver distances. It is also shown that the proposed method is more robust to background noise than a baseline approach. The best estimation accuracy is obtained in the region from -5 to 5 dB which is a relevant range for portable devices.