用球形麦克风阵列测量房间脉冲响应反射的空间减法

T. Deppisch, J. Ahrens, S. V. A. Garí, P. Calamia
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引用次数: 4

摘要

我们提出了一种将测量的定向房间脉冲响应(drir)分解为突出反射和残差的方法。该方法包括获取给定反射所携带的时频信号的指纹,将该时频指纹施加到与反射具有相同传播方向的平面波原型上,最后从DRIR中减去该平面波原型。我们的主要贡献是将问题表述为空间减法,以及将阶截断、空间混叠和径向滤波器的正则化纳入潜在波束形成问题的定义中。基于模拟和测量的阵列脉冲响应,我们证明了我们的方法提高了被测反射模型的精度,从而降低了在空间减法后残留在测量DRIR中的残差能量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Spatial Subtraction of Reflections from Room Impulse Responses Measured with a Spherical Microphone Array
We propose a method for the decomposition of measured directional room impulse responses (DRIRs) into prominent reflections and a residual. The method comprises obtaining a fingerprint of the time-frequency signal that a given reflection carries, imposing this time-frequency fingerprint on a plane-wave prototype that exhibits the same propagation direction as the reflection, and finally subtracting this plane-wave prototype from the DRIR. Our main contributions are the formulation of the problem as a spatial subtraction as well as the incorporation of order truncation, spatial aliasing and regularization of the radial filters into the definition of the underlying beamforming problem. We demonstrate, based on simulated as well as measured array impulse responses, that our method increases the accuracy of the model of the reflection under test and consequently decreases the energy of the residual that remains in a measured DRIR after the spatial subtraction.
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