TY - GEN
T1 - Blind compensation of inter-channel sampling frequency mismatch with maximum likelihood estimation in STFT domain
AU - Miyabe, Shigeki
AU - Ono, Nobutaka
AU - Makino, Shoji
PY - 2013/10/18
Y1 - 2013/10/18
N2 - This paper proposes a novel blind compensation of sampling frequency mismatch for asynchronous microphone array. Digital signals simultaneously observed by different recording devices have drift of the time differences between the observation channels because of the sampling frequency mismatch among the devices. Based on the model that such the time difference is constant within each time frame, but varies proportional to the time frame index, the effect of the sampling frequency mismatch can be compensated in the short-time Fourier transform domain by the linear phase shift. By assuming the sources are motionless and stationary, a likelihood of the sampling frequency mismatch is formulated. The maximum likelihood estimation is obtained effectively by a golden section search.
AB - This paper proposes a novel blind compensation of sampling frequency mismatch for asynchronous microphone array. Digital signals simultaneously observed by different recording devices have drift of the time differences between the observation channels because of the sampling frequency mismatch among the devices. Based on the model that such the time difference is constant within each time frame, but varies proportional to the time frame index, the effect of the sampling frequency mismatch can be compensated in the short-time Fourier transform domain by the linear phase shift. By assuming the sources are motionless and stationary, a likelihood of the sampling frequency mismatch is formulated. The maximum likelihood estimation is obtained effectively by a golden section search.
KW - Asynchronous microphone array
KW - blind source separation
KW - maximum likelihood estimation
KW - sampling frequency
UR - http://www.scopus.com/inward/record.url?scp=84890491223&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84890491223&partnerID=8YFLogxK
U2 - 10.1109/ICASSP.2013.6637733
DO - 10.1109/ICASSP.2013.6637733
M3 - Conference contribution
AN - SCOPUS:84890491223
SN - 9781479903566
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 674
EP - 678
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 -