公开(公告)号：US20040032796A1

公开(公告)日：2004-02-19

申请号：US10414421

申请日：2003-04-15

Applicant: Polycom, Inc.

Inventor： Peter L. Chu ,  Michael Kenoyer ,  Richard Washington

IPC: G01S003/80

CPC classification number: H04R3/005 ,  G01S5/18 ,  H04N7/142 ,  H04R2201/401 ,  H04R2430/23

Abstract: In accordance with the present invention, a system and method for computing a location of an acoustic source is disclosed. The method includes steps of processing a plurality of microphone signals in frequency space to search a plurality of candidate acoustic source locations for a maximum normalized signal energy. The method uses phase-delay look-up tables to efficiently determine phase delays for a given frequency bin number k based upon a candidate source location and a microphone location, thereby reducing system memory requirements. Furthermore, the method compares a maximum signal energy for each frequency bin number k with a threshold energy Et(k) to improve accuracy in locating the acoustic source.

Abstract translation: 根据本发明，公开了一种用于计算声源的位置的系统和方法。 该方法包括在频率空间中处理多个麦克风信号以搜索多个候选声源位置以获得最大归一化信号能量的步骤。 该方法使用相位延迟查找表来有效地确定基于候选源位置和麦克风位置的给定频率仓数k的相位延迟，从而减少系统存储器要求。 此外，该方法将每个频率仓数k的最大信号能量与阈值能量Et（k）进行比较，以提高定位声源的精度。

公开(公告)号：US20040032487A1

公开(公告)日：2004-02-19

申请号：US10414420

申请日：2003-04-15

Applicant: Polycom, Inc.

Inventor： Peter L. Chu ,  Michael Kenoyer ,  Richard Washington

IPC: H04N007/14

CPC classification number: H04N7/148 ,  G01S5/18 ,  H04N7/142

Abstract: A system and method for acoustic source location using a horizontal and vertical microphone array. Tilt sensors are provided within each array to allow full determination of the tilt of each array. Based on the acoustic source location results, an image capture device may be maneuvered to focus in the direction of the acoustic source location.

Abstract translation: 使用水平和垂直麦克风阵列的声源位置的系统和方法。 在每个阵列中提供倾斜传感器以允许完全确定每个阵列的倾斜。 基于声源位置结果，可以操纵图像捕获装置以在声源位置的方向上聚焦。