公开(公告)号：US08582783B2

公开(公告)日：2013-11-12

申请号：US12936432

申请日：2009-04-06

Applicant: David Stanley McGrath ,  David Matthew Cooper

Inventor： David Stanley McGrath ,  David Matthew Cooper

IPC: H04B15/00

CPC classification number: H04R3/005 ,  H04R5/027 ,  H04R2430/20 ,  H04S3/002 ,  H04S7/30

Abstract: A signal from each of an array of microphones is analyzed. For at least one subset of microphone signals, a time difference is estimated, which characterizes the relative time delays between the signals in the subset. A direction is estimated from which microphone inputs arrive from one or more acoustic sources, based at least partially on the estimated time differences. The microphone signals are filtered in relation to at least one filter transfer function, related to one or more filters. A first filter transfer function component has a value related to a first spatial orientation of the arrival direction, and a second component has a value related to a spatial orientation that is substantially orthogonal in relation to the first. A third filter function may have a fixed value. A driving signal for at least two loudspeakers is computed based on the filtering.

Abstract translation: 分析来自麦克风阵列中的每一个的信号。 对于麦克风信号的至少一个子集，估计时差，其表征子集中的信号之间的相对时间延迟。 基于至少部分地基于估计的时间差估计从一个或多个声源到达麦克风输入的方向。 麦克风信号相对于与一个或多个滤波器有关的至少一个滤波器传递函数进行滤波。 第一滤波器传递函数分量具有与到达方向的第一空间取向相关的值，并且第二分量具有与相对于第一分量基本正交的空间取向相关的值。 第三个滤波器功能可能具有固定值。 基于滤波计算至少两个扬声器的驱动信号。

公开(公告)号：US20110033063A1

公开(公告)日：2011-02-10

申请号：US12936432

申请日：2009-04-06

Applicant: David Stanley McGrath ,  David Matthew Cooper

Inventor： David Stanley McGrath ,  David Matthew Cooper

IPC: H04R3/00

CPC classification number: H04R3/005 ,  H04R5/027 ,  H04R2430/20 ,  H04S3/002 ,  H04S7/30

Abstract: A signal from each of an array of microphones is analyzed. For at least one subset of microphone signals, a time difference is estimated, which characterizes the relative time delays between the signals in the subset. A direction is estimated from which microphone inputs arrive from one or more acoustic sources, based at least partially on the estimated time differences. The microphone signals are filtered in relation to at least one filter transfer function, related to one or more filters. A first filter transfer function component has a value related to a first spatial orientation of the arrival direction, and a second component has a value related to a spatial orientation that is substantially orthogonal in relation to the first. A third filter function may have a fixed value. A driving signal for at least two loudspeakers is computed based on the filtering.

Abstract translation: 分析来自麦克风阵列中的每一个的信号。 对于麦克风信号的至少一个子集，估计时差，其表征子集中的信号之间的相对时间延迟。 基于至少部分地基于估计的时间差估计从一个或多个声源到达麦克风输入的方向。 麦克风信号相对于与一个或多个滤波器有关的至少一个滤波器传递函数进行滤波。 第一滤波器传递函数分量具有与到达方向的第一空间取向相关的值，并且第二分量具有与相对于第一分量基本正交的空间取向相关的值。 第三个滤波器功能可能具有固定值。 基于滤波计算至少两个扬声器的驱动信号。