Active speech source localization by a dual coarse-to-fine search

TitleActive speech source localization by a dual coarse-to-fine search
Publication TypeConference Papers
Year of Publication2001
AuthorsDuraiswami R, Zotkin DN, Davis LS
Conference Name2001 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2001. Proceedings. (ICASSP '01)
Date Published2001///
ISBN Number0-7803-7041-4
Keywordsactive speech source localization, array signal processing, Computer interfaces, Delay effects, delay estimation, delay-based estimators, dual coarse-to-fine search, Frequency, Inverse problems, Laboratories, multiple speech sound sources, Position measurement, real-time implementation, Sensor arrays, Signal processing algorithms, space, speech, Speech processing, Teleconferencing, videoconferencing systems

Accurate and fast localization of multiple speech sound sources is a significant problem in videoconferencing systems. Based on the observation that the wavelengths of the sound from a speech source are comparable to the dimensions of the space being searched, and that the source is broadband, we develop an efficient search strategy that finds the source(s) in a given space. The search is made efficient by using coarse-to-fine strategies in both space and frequency. The algorithm is shown to be robust compared to typical delay-based estimators and fast enough for real-time implementation. Its performance can be further improved by using constraints from computer vision