US 11,871,190 B2
Separating space-time signals with moving and asynchronous arrays
Andrew C. Singer, Champaign, IL (US); and Ryan M. Corey, Glen Ellyn, IL (US)
Assigned to The Board of Trustees of the University of Illinois, Urbana, IL (US)
Appl. No. 17/622,038
Filed by The Board of Trustees of the University of Illinois, Urbana, IL (US)
PCT Filed Jul. 2, 2020, PCT No. PCT/US2020/040603
§ 371(c)(1), (2) Date Dec. 22, 2021,
PCT Pub. No. WO2021/003334, PCT Pub. Date Jan. 7, 2021.
Claims priority of provisional application 62/870,504, filed on Jul. 3, 2019.
Prior Publication US 2022/0272445 A1, Aug. 25, 2022
Int. Cl. H04R 3/00 (2006.01); G10L 21/0216 (2013.01); G10L 21/0208 (2013.01)
CPC H04R 3/005 (2013.01) [G10L 21/0216 (2013.01); G10L 2021/02087 (2013.01); G10L 2021/02166 (2013.01); H04R 2227/003 (2013.01); H04R 2430/20 (2013.01)] 33 Claims
OG exemplary drawing
 
1. A method for separating sound sources, the method comprising:
digitizing acoustic signals from a plurality of sources with a plurality of microphone arrays,
wherein each of the plurality of microphone arrays comprises one or more microphones;
at each of the plurality of microphone arrays, sending first data to a processing node;
estimating spatial parameters of the digitized acoustic signals;
estimating a plurality of time-varying source spectra for the plurality of sources from the digitized acoustic signals as a function of the received first data; and
estimating source signals for one or more of the plurality of sources by filtering the digitized acoustic signals digitized at the microphone arrays using the spatial parameters of the digitized acoustic signals and the plurality of time-varying source spectra from all of the plurality of microphone arrays.