-
公开(公告)号：US20220295175A1
公开(公告)日：2022-09-15
申请号：US17191253
申请日：2021-03-03
Applicant: Northwestern Polytechnical University
Inventor： Jingdong CHEN , Jilu Jin , Gongping Huang , Xuehan Wang
IPC: H04R1/40 , H04R3/00 , G10L21/0216
Abstract: An Nth order linear differential microphone array (LDMA) with a steerable beamformer may be constructed by specifying a target beampattern for the LDMA at a steering angle θ. An Nth order polynomial associated with the target beampattern may then be generated. A relationship between the nulls of the polynomial and the steering angle θ is determined and then a value of one of the nulls is determined based on N−1 assigned values for the other nulls and the determined relationship between the nulls of the polynomial and the steering angle θ. The steerable beamformer may be generated based on the determined null value and the N−1 assigned null values. The N−1 assigned null values may be associated with the N−1 nulls of the polynomial that are of less than Nth order and the determined null value may be associated with the null of the polynomial that is of Nth order.
-
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
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：US11956590B2
公开(公告)日：2024-04-09
申请号：US17413111
申请日：2019-03-19
Applicant: Northwestern Polytechnical University
Inventor： Jingdong Chen , Gongping Huang
Abstract: A beamformer, for a differential microphone array (DMA) including a number M of microphones, is constructed based on a specified target directivity factor (DF) value for the DMA. An N order beampattern is generated for the DMA, wherein N is an integer and a first DF value corresponding to the N order beampattern is greater than the target DF value. An N−1 order beampattern is generated for the DMA, wherein a second DF value corresponding to the N−1 order beampattern is greater than the target DF value. A fractional order beampattern is generated for the DMA, wherein a third DF value corresponding to the fractional order beampattern matches the target DF value and the fractional order beampattern comprises a first fractional contribution from the N order beampattern and a second fractional contribution from the N−1 order beampattern.
-
Patent Agency Ranking
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.
-
6.发明申请公开(公告)号：US20190069086A1
公开(公告)日：2019-02-28
申请号：US16117186
申请日：2018-08-30
Applicant: Northwestern Polytechnical University
Inventor： Jingdong Chen , Gongping Huang
Abstract: A multi-ringed differential microphone array includes a first number of microphones situated along a first substantial circle having a first radius, a second number of microphones situated along a second substantial circle having a second radius, and a processing device, communicatively coupled to the first number microphones and the second number of microphones, to receive a plurality of electronic signals generated by the first number of microphones and the second number of microphones, determine a differential order (N) based on the second number, and execute an N-th order minimum-norm beamformer to calculate an estimate of the sound source based on the plurality of electronic signals.
-
公开(公告)号：US11509998B2
公开(公告)日：2022-11-22
申请号：US17191253
申请日：2021-03-03
Applicant: Northwestern Polytechnical University
Inventor： Jingdong Chen , Jilu Jin , Gongping Huang , Xuehan Wang
IPC: H04R1/40 , H04R3/00 , G10L21/0216
Abstract: An Nth order linear differential microphone array (LDMA) with a steerable beamformer may be constructed by specifying a target beampattern for the LDMA at a steering angle θ. An Nth order polynomial associated with the target beampattern may then be generated. A relationship between the nulls of the polynomial and the steering angle θ is determined and then a value of one of the nulls is determined based on N−1 assigned values for the other nulls and the determined relationship between the nulls of the polynomial and the steering angle θ. The steerable beamformer may be generated based on the determined null value and the N−1 assigned null values. The N−1 assigned null values may be associated with the N−1 nulls of the polynomial that are of less than Nth order and the determined null value may be associated with the null of the polynomial that is of Nth order.
-
8.发明授权公开(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
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：US10951981B1
公开(公告)日：2021-03-16
申请号：US16717644
申请日：2019-12-17
Applicant: Northwestern Polytechnical University
Inventor： Jingdong Chen , Jilu Jin , Gongping Huang
Abstract: An Nth order linear differential microphone array (LDMA) including at most M microphones, where M is greater than N, is constructed by identifying a number K of combinations of at least (N+1) of the M microphones. A target cost function is specified based on at least one of a directivity factor, a beampattern, or a white noise gain associated with the LDMA. For each frequency band of a plurality of frequency bands: an optimal combination of microphones, from the K combinations, is determined based on an evaluation of the target cost function for the band and beamforming is performed using the determined optimal combination for the band. A union of the optimal combinations of microphones for the plurality of bands may be determined and the LDMA may be constructed, using microphones in the union, based on an evaluation of the target cost function across the plurality of bands.
-
-
-
-
-
-
-
-
Search Results
9
records
(took 0.013 seconds)
