Tracking and beamforming for multiple simultaneous speakers with probabilistic data association filters

  title={Tracking and beamforming for multiple simultaneous speakers with probabilistic data association filters},
  author={Tobias Gehrig and Ulrich Klee and John W. McDonough and Shajith Ikbal and Matthias W{\"o}lfel and Christian F{\"u}gen},
In prior work, we developed a speaker tracking system based on an extended Kalman filter using time delays of arrival (TDOAs) as acoustic features. While this system functioned well, its utility was limited to scenarios in which a single speaker was to be tracked. In this work, we remove this restriction by generalizing the IEKF, first to a probabilistic data association filter, which incorporates a clutter model for rejection of spurious acoustic events, and then to a joint probabilistic data… CONTINUE READING
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Key Quantitative Results

  • In a set of automatic speech recognition experiments conducted on the output of a 64 channel microphone array which was beamformed using automatic speaker position estimates, applying the JPDAF tracking system reduced word error rate from 67.3% to 66.0%. Moreover, the word error rate on the beamformed output was 13.0% absolute lower than on a single channel of the array.


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