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Tone based speech recognition

  • US 6,553,342 B1
  • Filed: 02/02/2000
  • Issued: 04/22/2003
  • Est. Priority Date: 02/02/2000
  • Status: Expired due to Term
First Claim
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1. A system for speech recognition comprising:

  • an input terminal for receiving a segment of speech;

    a speech classifier having an input coupled to the input terminal and an output to provide an indication of whether the speech segment comprises voiced or unvoiced speech;

    a speech feature detector having a first input coupled to the input terminal, a second input coupled to the output of the of the speech classifier, and an output to provide a speech feature vector having a plurality of feature values indicating features of the speech segment, the speech feature vector including at least a tonal feature value indicating a tonal feature of the speech segment when the speech segment comprises voiced speech; and

    a speech recogniser having an input coupled to the output of the speech feature detector and an output to provide an indication of which of a predetermined plurality of speech models is a good match to the speech segment.

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