Adaptive-Bandwidth Audio Input for the Narrowband Linear Predictive Coder.

Abstract

Digital voice communication systems using linear predictive coders lose intelligibility through failure to reproduce certain speech sounds. Sibilants may have spectra falling entirely outside the input passboard of the digital processor. An adaptive analog input filter allows sibilant energy to enter the processor. Although distortion is produced, intelligibility is improved. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Mar 18, 1983
Accession Number
ADA125728

Entities

People

  • A. F. Thornhill
  • H. O. Murphy

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Adaptive Filters
  • Amplitude
  • Capacitors
  • Circuits
  • Communication Systems
  • Comparators
  • Detectors
  • Distortion
  • Generators
  • High Pass Filters
  • Integrated Circuits
  • Low Pass Filters
  • Power Supplies
  • Switches
  • Tape Recording
  • Voice Communications
  • Warning Systems

Readers

  • Economics
  • Speech Processing/Speech Recognition.