TY - GEN
T1 - HRTF aided broadband DOA estimation using two microphones
AU - Talagala, Dumidu S.
AU - Abhayapala, Thushara D.
PY - 2012
Y1 - 2012
N2 - Two sensor broadband direction of arrival (DOA) estimation suffers from an inherent lack of dimensionality due to having just two sensors, yet humans and other animals are able to overcome this limitation using subtle variations introduced by the ears. Application of existing DOA estimation techniques to such systems becomes complicated due to the ill-behaved nature of the Head Related Transfer Function (HRTF). In this paper we present a subband signal extraction and focussing technique which retains the diversity information of the HRTF. We then develop a framework for combining these signals for subspace DOA estimation and investigate the constraints imposed on the single and multi-source DOA estimation problems. Finally, estimation performance is compared with existing techniques and we find performance has improved to be comparable to human localisation abilities.
AB - Two sensor broadband direction of arrival (DOA) estimation suffers from an inherent lack of dimensionality due to having just two sensors, yet humans and other animals are able to overcome this limitation using subtle variations introduced by the ears. Application of existing DOA estimation techniques to such systems becomes complicated due to the ill-behaved nature of the Head Related Transfer Function (HRTF). In this paper we present a subband signal extraction and focussing technique which retains the diversity information of the HRTF. We then develop a framework for combining these signals for subspace DOA estimation and investigate the constraints imposed on the single and multi-source DOA estimation problems. Finally, estimation performance is compared with existing techniques and we find performance has improved to be comparable to human localisation abilities.
KW - Direction of arrival (DOA)
KW - MUSIC
KW - head related transfer function (HRTF)
KW - source localisation
UR - http://www.scopus.com/inward/record.url?scp=84872158757&partnerID=8YFLogxK
U2 - 10.1109/ISCIT.2012.6380863
DO - 10.1109/ISCIT.2012.6380863
M3 - Conference contribution
SN - 9781467311571
T3 - 2012 International Symposium on Communications and Information Technologies, ISCIT 2012
SP - 1133
EP - 1138
BT - 2012 International Symposium on Communications and Information Technologies, ISCIT 2012
T2 - 2012 International Symposium on Communications and Information Technologies, ISCIT 2012
Y2 - 2 October 2012 through 5 October 2012
ER -