TY - GEN
T1 - Blind multi-channel source separation by circular-linear statistical modeling of phase differences
AU - Traa, Johannes
AU - Smaragdis, Paris
N1 - Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2013/10/18
Y1 - 2013/10/18
N2 - We address the problem of blind separation of speech signals with a microphone array. We demonstrate that a signal propagating towards the array at an angle corresponds to interchannel phase difference (IPD) data that lies on a wrapped line (i.e helix) in a circular-linear domain. Thus, the problem reduces to that of fitting helices to data that lies on a cylinder. However, outliers abound because of reverberation, noise, and signal overlap in the time-frequency domain, so we perform the clustering with a sequential variant of Random Sample Consensus (RANSAC). We show that this method can easily be applied to arrays with many microphones and that it is robust in reverberant experimental conditions.
AB - We address the problem of blind separation of speech signals with a microphone array. We demonstrate that a signal propagating towards the array at an angle corresponds to interchannel phase difference (IPD) data that lies on a wrapped line (i.e helix) in a circular-linear domain. Thus, the problem reduces to that of fitting helices to data that lies on a cylinder. However, outliers abound because of reverberation, noise, and signal overlap in the time-frequency domain, so we perform the clustering with a sequential variant of Random Sample Consensus (RANSAC). We show that this method can easily be applied to arrays with many microphones and that it is robust in reverberant experimental conditions.
KW - RANSAC
KW - blind source separation
KW - circular statistics
KW - von Mises distribution
UR - http://www.scopus.com/inward/record.url?scp=84890464823&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84890464823&partnerID=8YFLogxK
U2 - 10.1109/ICASSP.2013.6638475
DO - 10.1109/ICASSP.2013.6638475
M3 - Conference contribution
AN - SCOPUS:84890464823
SN - 9781479903566
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 4320
EP - 4324
BT - 2013 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2013 - Proceedings
T2 - 2013 38th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2013
Y2 - 26 May 2013 through 31 May 2013
ER -