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Apparatus and method for determining articulatory-orperation speech parameters

  • US 5,913,188 A
  • Filed: 09/11/1995
  • Issued: 06/15/1999
  • Est. Priority Date: 09/26/1994
  • Status: Expired due to Term
First Claim
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1. An apparatus for determining, from an input speech signal, parameters defining the articulatory operation of a speech production system that generated the input speech signal, the apparatus comprising:

  • dividing means operable for dividing the input speech signal into a succession of frames;

    a feature analyzer operable for determining acoustic features of the input speech signal during each frame;

    a segmenter operable for defining a succession of segments as a number of frames by (i) comparing signals representative of the acoustic features for a current frame with signals representative of the acoustic features of previous frames in a current segment;

    (ii) including he current frame in the current segment if said signals differ by less than a threshold value; and

    (iii) beginning a new segment with the current frame if said signals differ by more than said threshold value; and

    determining means operable for determining, for each segment, said articulatory speech production parameters using the acoustic features of the input speech signal during the segment and using stored reference data which relates said acoustic features to said articulatory speech production parameters.

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