SYSTEMS AND METHODS FOR RESPONDING TO NATURAL LANGUAGE SPEECH UTTERANCE

  • US 20100204986A1
  • Filed: 04/22/2010
  • Published: 08/12/2010
  • Est. Priority Date: 06/03/2002
  • Status: Active Grant
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First Claim
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1. A method for filtering and eliminating noise from natural language speech utterances, comprising:

  • receiving a natural language utterance from a user at a microphone array, wherein the microphone array directs a beam pattern in a direction of the user, the beam pattern including one or more nulls that notch out point or limited area noise sources;

    establishing parameters for a band shaping and notch filtering mechanism, the parameters established by comparing environmental noise to the signal representing the utterance;

    removing narrow-band noise from the signal representing the utterance using the band shaping and notch filtering mechanism, the band shaping and notch filtering mechanism optimized according to the established parameters;

    suppressing cross-talk and environmentally caused echoes in the signal representing the utterance using adaptive echo cancellation;

    removing momentary gaps from the signal representing the utterance using adaptive lossy compression; and

    storing a digitized representation of the signal representing the utterance in an output buffer.

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