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Tracking talkers using virtual broadside scan and directed beams

  • US 20060256974A1
  • Filed: 04/11/2006
  • Published: 11/16/2006
  • Est. Priority Date: 04/29/2005
  • Status: Active Grant
First Claim
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1. A method comprising:

  • (a) identifying one or more angles of one or more acoustic sources from peaks in an amplitude envelope, wherein the amplitude envelope corresponds to an output of a virtual broadside scan on blocks of input signal samples, one block from each microphone in an array of microphones;

    (b) for each of the source angles, operating on the input signal blocks with a directed beam pointed in the direction of the source angle to obtain a corresponding beam signal;

    (c) classifying each source as intelligence or noise based on analysis of spectral characteristics of the corresponding beam signal;

    (d) of those one or more sources that are classified as intelligence, identifying one or more sources whose corresponding beams signals have highest energies;

    (e) generating an output signal from the one or more beam signals corresponding to the one or more intelligence sources having highest energies.

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