TY - GEN
T1 - On the Design of Square Differential Microphone Arrays with A Multistage Structure
AU - Zhao, Xudong
AU - Huang, Gongping
AU - Benesty, Jacob
AU - Chen, Jingdong
AU - Cohen, Israel
N1 - Publisher Copyright:
©2021 IEEE.
PY - 2021
Y1 - 2021
N2 - This paper studies the problem of designing square differential microphone arrays (SDMAs). It presents a multistage approach, which first divides an SDMA composed of M2 microphones into (M - 1)2 subarrays with each subarray being a 2 × 2 square array formed by four adjacent microphones. Then, differential beam- forming is performed with each subarray in the first-stage. The first-stage differential beamformers' outputs are subsequently used as the inputs of the second stage to form (M - 2)2 subarrays and a second-stage differential beamforming is then performed. Continu- ing this process till the (M-1)th stage, we obtain the final output of the SDMA. The SDMA designed in such a multistage structure has two important properties. First, the global weighting matrix is equal to the two dimensional convolution of weighting matrices from the first stage to the last one. Second, the global beampattern is equal to the product of beampatterns from all stages. Consequently, we can combine different kinds of beamformers in different stages and have better control of the performance metrics.
AB - This paper studies the problem of designing square differential microphone arrays (SDMAs). It presents a multistage approach, which first divides an SDMA composed of M2 microphones into (M - 1)2 subarrays with each subarray being a 2 × 2 square array formed by four adjacent microphones. Then, differential beam- forming is performed with each subarray in the first-stage. The first-stage differential beamformers' outputs are subsequently used as the inputs of the second stage to form (M - 2)2 subarrays and a second-stage differential beamforming is then performed. Continu- ing this process till the (M-1)th stage, we obtain the final output of the SDMA. The SDMA designed in such a multistage structure has two important properties. First, the global weighting matrix is equal to the two dimensional convolution of weighting matrices from the first stage to the last one. Second, the global beampattern is equal to the product of beampatterns from all stages. Consequently, we can combine different kinds of beamformers in different stages and have better control of the performance metrics.
KW - Differential beamforming
KW - Frequency invariance
KW - Microphone arrays
KW - Multistage structure
KW - Square arrays
UR - http://www.scopus.com/inward/record.url?scp=85115095480&partnerID=8YFLogxK
U2 - 10.1109/ICASSP39728.2021.9413759
DO - 10.1109/ICASSP39728.2021.9413759
M3 - 会议稿件
AN - SCOPUS:85115095480
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 746
EP - 750
BT - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2021 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2021
Y2 - 6 June 2021 through 11 June 2021
ER -