Statistical properties of fluctuation of pitch intervals and its modeling for natural synthetic speech

Tetsunori Kobayashi*, Hidetoshi Sekine

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)


Statistical properties of the fluctuation of pitch intervals are investigated, and pitch generation models considering fluctuation are discussed. Experimental results of natural speech analysis show that the distribution of pitch fluctuation can be approximated by shifted gamma distribution and that the correlation coefficients of 0th-5th and 30th-60th order show strong positive values. Several pitch generation models dealing with fluctuation are tested with the aim of realizing natural synthetic speech. The results of perceptual experiments recommend the fluctuation model using a 15th-order autoregressive filter excited by a uniform random number. The quality of the synthetic speech using the above fluctuation model is comparable to that of speech with the original fluctuation.

Original languageEnglish
Pages (from-to)321-324
Number of pages4
JournalICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
Publication statusPublished - 1990
Externally publishedYes
Event1990 International Conference on Acoustics, Speech, and Signal Processing: Speech Processing 2, VLSI, Audio and Electroacoustics Part 2 (of 5) - Albuquerque, New Mexico, USA
Duration: 1990 Apr 31990 Apr 6

ASJC Scopus subject areas

  • Software
  • Signal Processing
  • Electrical and Electronic Engineering


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