Interspeech'2005 - Eurospeech
Time delay of arrival (TDOA) estimation between signals input to two or more microphones plays an important role in speaker localization. Most methods employ a linear array of two or more microphones and use the generalized cross correlation method or eigenspace analysis (AEDA) methods. TDOA estimation with linear arrays, however, is highly sensitive to estimation errors when the signals arrive from an endfire direction. In this paper we propose a novel adaptive algorithm which makes use of a three-microphone planar array. This algorithm exhibits a much smaller estimation error over the complete azimuth range of 0-360 degrees as compared to other algorithms. The computational complexity of this approach is comparable to other state-of-the-art algorithms.
Bibliographic reference. Madhu, Nilesh / Martin, Rainer (2005): "Robust speaker localization through adaptive weighted pair TDOA (AWEPAT) estimation", In INTERSPEECH-2005, 2341-2344.