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arXiv 2103.01830cs.SDcs.LGeess.AS
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使用冗余自组织麦克风阵列网络的音频场景监测

Audio scene monitoring using redundant ad-hoc microphone array networks

University of California San Diego(加州大学圣迭戈分校);Université de Sherbrooke(舍布鲁克大学)

Peter Gerstoft, Yihan Hu, Michael J. Bianco, Chaitanya Patil, Ardel Alegre, Yoav Freund, Francois Grondin

摘要:

我们提出了一个系统,用于定位声源在一个房间里有几个特设麦克风阵列。每个圆形阵列使用商业软件独立地执行到达方向(DOA)估计。DOA被馈送到融合中心,级联,并用于执行基于两种方法的定位,这两种方法只需要很少的标记源位置(锚点)进行训练。第一种方法是基于主成分分析(PCA)的观测波达方向,不需要任何知识的锚点。然后,阵列集群可以在由级联的波达方向随时间的PCA定义的流形上执行定位。第二种方法使用DOA向量和房间流形之间的仿射变换进行定位。PCA对训练序列的要求更少,但对来自阵列之一的丢失DOA的鲁棒性较低。这些方法使用五个物联网8麦克风圆形阵列进行演示,这些阵列放置在办公室中未指定的固定位置。PCA和仿射方法都可以很容易地基于几个锚点以相似的精度绘制出矩形。所提出的方法提供了一个步骤,以监测活动的灵巧家庭,并要求很少的安装工作,因为不需要的阵列位置。

英文摘要:

We present a system for localizing sound sources in a room with several ad-hoc microphone arrays. Each circular array performs direction of arrival (DOA) estimation independently using commercial software. The DOAs are fed to a fusion center, concatenated, and used to perform the localization based on two proposed methods, which require only few labeled source locations (anchor points) for training. The first proposed method is based on principal component analysis (PCA) of the observed DOA and does not require any knowledge of anchor points. The array cluster can then perform localization on a manifold defined by the PCA of concatenated DOAs over time. The second proposed method performs localization using an affine transformation between the DOA vectors and the room manifold. The PCA has fewer requirements on the training sequence, but is less robust to missing DOAs from one of the arrays. The methods are demonstrated with five IoT 8-microphone circular arrays, placed at unspecified fixed locations in an office. Both the PCA and the affine method can easily map out a rectangle based on a few anchor points with similar accuracy. The proposed methods provide a step towards monitoring activities in a smart home and require little installation effort as the array locations are not needed.

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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