Direct methods estimate the position of an acoustic source by sampling the environment through a set of properly placed microphones. SRP-Phat is probably the most popular direct method. It is based on computation of the generalized cross-correlation (GCC) of signals on a grid of preselected points. Anyway, in the presence of reverberation, the functional employed by SRP-Phat can be very irregular from point to point, thus making the source localization a difficult task. In this paper, a new functional is presented that regularizes the SRP-Phat approach and makes it more efficient the use of optimization algorithms to further refine the source position estimation. After a brief introduction, the proposed approach is described and compared to SRP-Phat on simulated and real data at different reverberation levels. ©2008 IEEE.
Sound mapping in reverberant rooms by a robust direct method / Cirillo, Albenzio; Parisi, Raffaele; Uncini, Aurelio. - (2008), pp. 285-288. (Intervento presentato al convegno 2008 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP tenutosi a Las Vegas; United States nel March 30 – April 4, 2008) [10.1109/ICASSP.2008.4517602].
Sound mapping in reverberant rooms by a robust direct method
CIRILLO, ALBENZIO;PARISI, Raffaele;UNCINI, Aurelio
2008
Abstract
Direct methods estimate the position of an acoustic source by sampling the environment through a set of properly placed microphones. SRP-Phat is probably the most popular direct method. It is based on computation of the generalized cross-correlation (GCC) of signals on a grid of preselected points. Anyway, in the presence of reverberation, the functional employed by SRP-Phat can be very irregular from point to point, thus making the source localization a difficult task. In this paper, a new functional is presented that regularizes the SRP-Phat approach and makes it more efficient the use of optimization algorithms to further refine the source position estimation. After a brief introduction, the proposed approach is described and compared to SRP-Phat on simulated and real data at different reverberation levels. ©2008 IEEE.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
