Spatial localization of sound sources: azimuth and elevation estimation
Spatial localization of sound sources: azimuth and elevation estimation
复制标题
声源的空间定位：方位角和仰角估计
DOI：
10.1109/imtc.1998.679796
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
N. Sugie
中科院分区：
文献类型：
--
作者：
Jie Huang;N. Ohnishi;N. Sugie
针对位于混响环境中的并发连续语音源，提出了一种基于模型的仿生声音定位方法。然而，该方法仅提供声源方位角的估计。当前的论文是通过使用四个麦克风组来扩展先前的方法，使其可用于 3D 空间中存在的声源。作为信号处理的过程，在每个可用的声音分量开始处计算不同麦克风对的到达时间差。然后计算高斯球表面上不同麦克风对的轨迹圆，并通过南极投影将其地形投影到由北极组成的水平面。通过对每个起始点的所有投影图求和来创建与源方向相对应的投影平面中的二维直方图。最后，声源的方向由二维直方图中主峰的位置确定。
A model-based bio-mimetic sound localization method has been proposed for concurrent and continuous speech sources located in reverberant environment. However, the method only provides the estimation of azimuths of sound sources. The current paper is to extend the previous method to be available for sound sources existing in the 3D space by using a four microphone set. As the procedure of signal processing, arrival time differences of different microphone pairs are calculated at each available onset of sound components. The locus circles of different microphone pairs in the surface of Gaussian Sphere are then calculated and projected topographically to a horizontal plane, which consists the north pole, by the south pole projection. A two dimensional histogram in the projected plane corresponding to the source direction is created by summing all the projected maps of every onsets. Finally, the directions of sound sources are determined by the position of the major peaks in the two-dimensional histogram.