Title :
Exact localization of acoustic reflectors from quadratic constraints
Author :
Canclini, A. ; Antonacci, F. ; Thomas, M.R.P. ; Filos, J. ; Sarti, A. ; Naylor, P.A. ; Tubaro, S.
Author_Institution :
Politec. di Milano, Vinci, Italy
Abstract :
In this paper we discuss a method for localizing acoustic reflectors in space based on acoustic measurements on source-to-microphone reflective paths. The method converts Time of Arrival (TOA) and Time Difference of Arrival (TDOA) into quadratic constraints on the line corresponding to the reflector. In order to be robust against measurement errors we derive an exact solution for the minimization of a cost function that combines an arbitrary number of quadratic constraints. Moreover we propose a new method for the analytic prediction of reflector localization accuracy. This method is sufficiently general to be applicable to a wide range of estimation problems.
Keywords :
acoustic measurement; acoustic radiators; acoustic signal processing; measurement errors; microphone arrays; minimisation; quadratic programming; time-of-arrival estimation; acoustic measurements; acoustic reflector localisation; cost function minimization; measurement errors; quadratic constraints; source-to-microphone reflective paths; time difference of arrival; time of arrival estimation; Acoustics; Lips; Software; World Wide Web; Microphone arrays; acoustic reflector localization; environment reconstruction; space-time audio processing;
Conference_Titel :
Applications of Signal Processing to Audio and Acoustics (WASPAA), 2011 IEEE Workshop on
Conference_Location :
New Paltz, NY
Print_ISBN :
978-1-4577-0692-9
Electronic_ISBN :
1931-1168
DOI :
10.1109/ASPAA.2011.6082277