Speech Transformation System (Spectrum and/or Excitation) without Pitch Extraction

Abstract

A new speech analysis-synthesis system has been developed which is capable of independent manipulation of the fundamental frequency and spectral envelope of a speech waveform. The system deconvolves the original speech with the spectral-envelope estimate to obtain a model for the excitation. Hence, explicit pitch extraction is not required. As a consequence, the transformed speech is more natural sounding than would be the case if the excitation were modeled as a sequence of pulses. The system has applications in the areas of voice modification, baseband-excited vocoders, time-scale modification, and frequency compression as an aid to the partially deaf.

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Document Details

Document Type
Technical Report
Publication Date
Jul 31, 1980
Accession Number
ADA097091

Entities

People

  • Stephanie Seneff

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Automated Speech Recognition
  • Bandpass Filters
  • Bandwidth
  • Cartesian Coordinates
  • Ear
  • Electrical Engineering
  • Engineering
  • Filters
  • Filtration
  • Frequency Bands
  • Frequency Domain
  • Frequency Shift
  • Signal Processing
  • Sine Waves
  • Speech Analysis
  • Speech Transmission
  • Waveforms

Fields of Study

  • Engineering

Readers

  • Speech Processing/Speech Recognition.
  • Theoretical Analysis.