Homomorphic Pitch Detection

Abstract

This note describes a homomorphic pitch detector which yields good performance on clear speech and moderate robustness to additive broadband noise, narrowband noise, and to degradation by a telephone simulator. It achieves the performance by the use of an adaptive time window, log-spectral windowing, an adaptive voicing threshold, and pitch track smoothing. It has been implemented in a real-time LPC vocoder for testing. Finally, a pilot study of a preprocessor to improve the performance of any coherence seeking pitch detector is presented.

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Document Details

Document Type
Technical Report
Publication Date
Aug 15, 1978
Accession Number
ADA062412

Entities

People

  • Douglas B. Paul

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies
  • Human Systems
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Algorithms
  • Amplitude
  • Analyzers
  • Broadband
  • Degradation
  • Detection
  • Detectors
  • Digital Signal Processing
  • Frequency
  • Pilot Studies
  • Signal Processing
  • Simulators
  • Sine Waves
  • Speech
  • Telephone Lines
  • Weighting Functions
  • White Noise

Readers

  • Phased Array Antenna Design.
  • Speech Processing/Speech Recognition.