Natural Communication with Computers. Volume 2. Speech Compression Research at BBN

Abstract

This report describes work in developing a linear predictive speech compression system that transmits high quality speech at low bit rates. The authors have developed several methods for reducing the redundancy in the speech signal without sacrificing speech quality. Included among these methods are preemphasis of the incoming speech signal, adaptive optimal selection of predictor order, optimal selection and quantization of transmission parameters, variable frame rate transmission, optimal encoding, and improved synthesis methodology. When all of these were incorporated a floating point simulation of a pitch-excited linear predictive vocoder, synthesized speech with high quality at average transmission rates as 1500 bps was obtained.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1974
Accession Number
ADA003478

Entities

People

  • John Makhoul
  • Lynn Cosell
  • R. Viswanathan
  • Wiliam R. Sutherland
  • William Russell

Organizations

  • BBN Technologies

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Coding
  • Coefficients
  • Compression
  • Computer Programming
  • Databases
  • Dynamic Range
  • Errors
  • Filters
  • Frequency
  • Information Science
  • Power Spectra
  • Probability Distributions
  • Signal Processing
  • Simulations
  • Speech Quality
  • Statistics

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Speech Processing/Speech Recognition.