公开(公告)号：US11159879B2

公开(公告)日：2021-10-26

申请号：US16771549

申请日：2018-07-16

Applicant: Northwestern Polytechnical University

Inventor： Jingdong Chen ,  Gongping Huang ,  Jacob Benesty

IPC: H04R3/00 ,  H04R1/40

Abstract: A differential microphone array includes a plurality of microphones situated on a substantially planar platform and a processing device, communicatively coupled to the plurality of microphones, to receive a plurality of electronic signals generated by the plurality of microphones responsive to a sound source and execute a minimum-norm beamformer to calculate an estimate of the sound source based on the plurality of electronic signals, wherein the minimum-norm beamformer is determined subject to a constraint that an approximation of a beampattern associated with the differential microphone array substantially matches a target beampattern.

公开(公告)号：US20220248135A1

公开(公告)日：2022-08-04

申请号：US17273237

申请日：2020-06-04

Applicant: Northwestern Polytechnical University

Inventor： Jingdong CHEN ,  Yuzhu Wang ,  Jilu Jin ,  Gongping Huang ,  Jacob Benesty

IPC: H04R3/00 ,  G10K11/178 ,  H04R5/027 ,  G10L21/0208

Abstract: A binaural beamformer comprising two beamforming filters may be communicatively coupled to a microphone array to generates two beamforming outputs, one for the left ear and the other for the right ear. The beamforming filters may be configured in such a way that they are orthogonal to each other to make white noise components in the binaural outputs substantially uncorrelated and desired signal components in the binaural outputs highly correlated. As a result, the human auditory system may better separate the desired signal from white noise and intelligibility of the desired signal may be improved.

公开(公告)号：US09930448B1

公开(公告)日：2018-03-27

申请号：US15347482

申请日：2016-11-09

Applicant: Northwestern Polytechnical University

Inventor： Jingdong Chen ,  Gongping Huang ,  Jacob Benesty

IPC: H04R3/00 ,  H04R1/40 ,  G01S3/80

CPC classification number: H04R3/005 ,  H04R1/406 ,  H04R2201/401 ,  H04R2430/21

Abstract: A differential microphone array includes a plurality of microphones situated on a substantially planar platform, the plurality of microphones including a total number (M) of microphones and at least two subsets of the plurality of microphones situated along at least two substantially concentric ellipses with respect to a center, and a processing device, communicatively coupled to the plurality of microphones, to receive a plurality of electronic signals generated by the plurality of microphones responsive to a sound source and execute a minimum-norm beamformer to calculate an estimate of the sound source based on the plurality of electronic signals, in which the minimum-norm beamformer has a differential order (N), and wherein M>N+1.

公开(公告)号：US09749745B2

公开(公告)日：2017-08-29

申请号：US14980802

申请日：2015-12-28

Applicant: Northwestern Polytechnical University

Inventor： Jingdong Chen ,  Jacob Benesty

IPC: H04R3/00 ,  H04R3/04 ,  H04R1/40 ,  H04R1/08

CPC classification number: H04R3/04 ,  H04R1/08 ,  H04R1/406 ,  H04R3/005 ,  H04R2201/403 ,  H04R2430/03 ,  H04R2430/21

Abstract: A differential microphone array includes a number (M) of microphone sensors for converting sound to a number of electrical signals, and a processor, operably coupled to the microphone sensors, to specify a target differential order (N) for the differential microphone array, and wherein M>N+1, specify a steering matrix D comprising N+1 steering vectors, calculate a respective one of a plurality of linearly specify a steering matrix D comprising N+1 steering vectors-constrained minimum variance filters based on the steering matrix, apply the respective one of the plurality of linearly-constrained minimum variance filters to a respective one of the electrical signals to calculate a respective frequency response of the electrical signals, wherein the respective frequency response comprises a plurality of components associated with a plurality of subbands, and sum the frequency responses of the electrical signals with respect to each subband to calculate an estimated frequency spectrum of the sound.

公开(公告)号：US09560463B2

公开(公告)日：2017-01-31

申请号：US14792783

申请日：2015-07-07

Applicant: Northwestern Polytechnical University

Inventor： Jingdong Chen ,  Chao Pan ,  Jacob Benesty

IPC: H04R3/00 ,  H04R29/00 ,  H04R1/40

CPC classification number: H04R29/005 ,  G10L21/0216 ,  G10L2021/02166 ,  H04R1/40 ,  H04R1/406 ,  H04R3/005 ,  H04R2201/40 ,  H04R2201/403 ,  H04R2410/01 ,  H04R2430/20 ,  H04R2430/23

Abstract: A system and method relate to receiving, by a processing device, a plurality of sound signals captured at a plurality of microphone sensors, wherein the plurality of sound signals are from a sound source, and wherein a number (M) of the plurality of microphone sensors is greater than three, determining a number (K) of layers for a multistage minimum variance distortionless response (MVDR) beamformer based on the number (M) of the plurality of microphone sensors, wherein the number (K) of layers is greater than one, and wherein each layer of the multistage MVDR beamformer comprises one or more mini-length MVDR beamformers, and executing the multistage MVDR beamformer to the plurality of sound signals to calculate an estimate of the sound source.

Abstract translation: 一种系统和方法涉及通过处理装置接收在多个麦克风传感器处捕获的多个声音信号，其中所述多个声音信号来自声源，并且其中所述多个麦克风的数量（M） 传感器大于3，基于多个麦克风传感器的数量（M）确定用于多级最小方差失真响应（MVDR）波束形成器的层数（K），其中层数（K）大于 一个，并且其中多级MVDR波束形成器的每层包括一个或多个微型长度MVDR波束形成器，并且对多个声音信号执行多级MVDR波束形成器以计算声源的估计。

公开(公告)号：US11546691B2

公开(公告)日：2023-01-03

申请号：US17273237

申请日：2020-06-04

Applicant: Northwestern Polytechnical University

Inventor： Jingdong Chen ,  Yuzhu Wang ,  Jilu Jin ,  Gongping Huang ,  Jacob Benesty

IPC: H04R3/00 ,  G10K11/178 ,  G10L21/0208 ,  H04R5/027 ,  G10L21/0216

Abstract: A binaural beamformer comprising two beamforming filters may be communicatively coupled to a microphone array to generates two beamforming outputs, one for the left ear and the other for the right ear. The beamforming filters may be configured in such a way that they are orthogonal to each other to make white noise components in the binaural outputs substantially uncorrelated and desired signal components in the binaural outputs highly correlated. As a result, the human auditory system may better separate the desired signal from white noise and intelligibility of the desired signal may be improved.

公开(公告)号：US20160277862A1

公开(公告)日：2016-09-22

申请号：US14792783

申请日：2015-07-07

Applicant: Northwestern Polytechnical University

Inventor： Jingdong Chen ,  Chao Pan ,  Jacob Benesty

IPC: H04R29/00 ,  H04R3/00

CPC classification number: H04R29/005 ,  G10L21/0216 ,  G10L2021/02166 ,  H04R1/40 ,  H04R1/406 ,  H04R3/005 ,  H04R2201/40 ,  H04R2201/403 ,  H04R2410/01 ,  H04R2430/20 ,  H04R2430/23

Abstract: A system and method relate to receiving, by a processing device, a plurality of sound signals captured at a plurality of microphone sensors, wherein the plurality of sound signals are from a sound source, and wherein a number (M) of the plurality of microphone sensors is greater than three, determining a number (K) of layers for a multistage minimum variance distortionless response (MVDR) beamformer based on the number (M) of the plurality of microphone sensors, wherein the number (K) of layers is greater than one, and wherein each layer of the multistage MVDR beamformer comprises one or more mini-length MVDR beamformers, and executing the multistage MVDR beamformer to the plurality of sound signals to calculate an estimate of the sound source.

Abstract translation: 一种系统和方法涉及通过处理装置接收在多个麦克风传感器处捕获的多个声音信号，其中所述多个声音信号来自声源，并且其中所述多个麦克风的数量（M） 传感器大于3，基于多个麦克风传感器的数量（M）确定用于多级最小方差失真响应（MVDR）波束形成器的层数（K），其中层数（K）大于 一个，并且其中多级MVDR波束形成器的每层包括一个或多个微型长度MVDR波束形成器，并且对多个声音信号执行多级MVDR波束形成器以计算声源的估计。