| Paper: | SAM-P7.7 | ||
| Session: | Applications of Multichannel Signal Processing | ||
| Time: | Thursday, May 20, 13:00 - 15:00 | ||
| Presentation: | Poster | ||
| Topic: | Sensor Array and Multichannel Signal Processing: Source localization, separation, classification, and tracking | ||
| Title: | NONNEGATIVE DECONVOLUTION FOR TIME OF ARRIVAL ESTIMATION | ||
| Authors: | Yuanqing Lin; University of Pennsylvania | ||
| Daniel Lee; University of Pennsylvania | |||
| Lawrence Saul; University of Pennsylvania | |||
| Abstract: | The interaural time difference (ITD) of arrival is a primary cue for acoustic sound source localization. Traditional estimation techniques for ITD based upon cross-correlation are related to maximum-likelihood estimation of a simple generative model. We generalize the time difference estimation into a deconvolution problem with nonnegativity constraints. The resulting nonnegative least squares optimization can be efficiently solved using a novel iterative algorithm with guaranteed global convergence properties. We illustrate the utility of this algorithm using simulations and experimental results from a robot platform. | ||
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