公开(公告)号：US20160118038A1

公开(公告)日：2016-04-28

申请号：US14521104

申请日：2014-10-22

Applicant: GOOGLE INC.

Inventor： D. James EATON ,  Alastair H. MOORE ,  Patrick A. NAYLOR ,  Jan SKOGLUND

IPC: G10K15/08

CPC classification number: G10K15/08 ,  G10L21/0208 ,  G10L25/03 ,  G10L25/18 ,  G10L25/21 ,  G10L2021/02082 ,  G10L2021/02166 ,  H04R3/005

Abstract: Provided are methods and systems for generating Direct-to-Reverberant Ratio (DRR) estimates. The methods and systems use a null-steered beamformer to produce accurate DRR estimates across a variety of room sizes, reverberation times, and source-receiver distances. The DRR estimation algorithm uses spatial selectivity to separate direct and reverberant energy and account for noise separately. The formulation considers the response of the beamformer to reverberant sound and the effect of noise. The DRR estimation algorithm is more robust to background noise than existing approaches, and is applicable where a signal is recorded with two or more microphones, such as with mobile communications devices, laptop computers, and the like.

Abstract translation: 提供了生成直接到混响比（DRR）估计的方法和系统。 这些方法和系统使用零转向波束形成器来在各种房间尺寸，混响时间和源 - 接收器距离之间产生准确的DRR估计。 DRR估计算法使用空间选择性分离直接和混响能量，分别考虑噪声。 该公式考虑了波束形成器对混响声音和噪声影响的响应。 与现有方法相比，DRR估计算法对背景噪声更加鲁棒，并且适用于使用两个或更多个麦克风记录信号，例如使用移动通信设备，膝上型计算机等。