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Linear predictive coding parameter manipulation/synthesis of incorrectly produced /r/

L I Shuster1

  • 1West Virginia University, Morgantown, 26506. u5050@wvnvm.wvnet.edu

Journal of Speech and Hearing Research
|August 1, 1996
PubMed
Summary
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This study shows how manipulating sound parameters like formant frequencies can fix speech errors and create high-pitched synthesized voices. This technique offers a reliable way to alter voice perception and improve speech synthesis quality.

Area of Science:

  • Speech synthesis
  • Acoustic phonetics
  • Digital signal processing

Background:

  • Incorrectly produced utterances pose challenges in speech therapy and synthesis.
  • Understanding the acoustic correlates of voice perception is crucial for speech modification.

Purpose of the Study:

  • To investigate the manipulation of Linear Predictive Coding (LPC) parameters for editing speech.
  • To determine if formant frequency manipulation can reliably alter speech perception.
  • To assess the feasibility of producing high-quality synthesized voices using this method.

Main Methods:

  • Manipulation of LPC parameters, specifically focusing on formant frequencies.
  • Synthesis of utterances with altered acoustic properties.
  • Perceptual evaluation of synthesized speech to assess changes in perceived characteristics.

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Main Results:

  • Demonstrated consistent and reliable changes in speech perception through formant frequency manipulation.
  • Successfully produced quality synthesized high-pitched voices.
  • Validated the effectiveness of LPC parameter editing for correcting speech production errors.

Conclusions:

  • LPC parameter manipulation is an effective technique for editing and synthesizing speech.
  • Formant frequency adjustments offer a precise method for controlling voice perception.
  • This approach holds promise for applications in speech therapy and advanced voice synthesis.