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SPEECH ANALYSIS APPARATUS, SPEECH ANALYSIS METHOD AND COMPUTER PROGRAM

  • US 20090030690A1
  • Filed: 07/21/2008
  • Published: 01/29/2009
  • Est. Priority Date: 07/25/2007
  • Status: Active Grant
First Claim
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1. A speech analysis apparatus analyzing prosodic characteristics of speech information and outputting a prosodic discrimination result, comprising:

  • an input unit performing input of speech information;

    an acoustic analysis unit analyzing frequency characteristics of respective analysis frames set in time series with respect to speech information inputted from the input unit and calculating relative pitch variation as variation information of frequency characteristics of respective analysis frames; and

    a discrimination unit performing speech discrimination processing based on the relative pitch variation generated by the acoustic analysis unit, andwherein the acoustic analysis unit calculates a current template relative pitch difference which is a relative pitch difference between a frequency characteristic of a current analysis frame and a previously set template frequency characteristic, determining whether a difference absolute value between the current template relative pitch difference and a previous template relative pitch difference which is a relative pitch difference between a frequency characteristic of a previous frame which is temporally previous to the current analysis frame and the template frequency characteristic is equal to or less than a predetermined threshold or not, when the value is not less than the threshold, calculating an adjacent relative pitch difference which is a relative pitch difference between the frequency characteristic of the current analysis frame and the frequency characteristic of the previous frame, and when the adjacent relative pitch difference is equal to or less than a previously set margin value, executing correction processing of adding or subtracting an octave of the current template relative pitch difference to calculate the relative pitch variation by applying the relative pitch difference as the relative pitch difference of the current analysis frame.

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