| Paper: | AE-P1.2 | ||
| Session: | Loudspeaker and Microphone Array Signal Processing | ||
| Time: | Wednesday, May 19, 13:00 - 15:00 | ||
| Presentation: | Poster | ||
| Topic: | Audio and Electroacoustics: Loudspeaker and Microphone Array Signal Processing | ||
| Title: | AN IMPROVED TDOA-BASED LOCATION ESTIMATION ALGORITHM FOR LARGE APERTURE MICROPHONE ARRAYS | ||
| Authors: | Ying Yu; Brown University | ||
| Harvey Silverman; Brown University | |||
| Abstract: | Location estimation is a vital aspect of a real-time large-aperture array system. To date, only time-difference-of-arrival(TDOA)-based algorithms run sufficiently fast for a real-time system, so we have been using this kind of locator, LEMSalg, in our real-time environment. In this paper we present an improved location estimation algorithm. In the new method, microphone-pair selection is made dynamic, rather than fixed a priori. Dynamic selection requires derivation of parameters and criteria. Here we use theoretical analysis, real system statistics and experimental results to obtain: 1) a suitable range for microphone-pair separation, 2) an ideal length for the TDOA vector, and 3) an effective TDOA quality assessment criterion. Experimental results based on real speech recorded in a moderately noisy environment at 5 different SNR levels are given to show the performance improvements. | ||
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