Speech Compression and Synthesis

Abstract

This document reports progress in the development of a phonetic speech synthesis algorithm, implementation and development of a real-time LPC vocoder, and development of a new high-frequency regeneration method for the excitation signal of voice-excited coders. The speech synthesis system now produces speech using an input string consisting only of triplets of phoneme identity, pitch, and duration, as required for the goal of very low transmission data rate. In real-time vocoder development, the implementation of an effective vocoder testing and debugging program and the implementation of the first two planned vocoder algorithm modifications are reported. The high-frequency regeneration method for voice-excited coders produces quite good voice quality at the cost of little or no extra computation. Keywords include: Speech synthesis, phonetic synthesis, diphone, LPC synthesis, vocoder, speech compression, linear prediction, voice-excited coder, and high-frequency regeneration.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1978
Accession Number
ADA155416

Entities

People

  • J. Klovstad
  • J. Makhoul
  • Jean Wolf
  • L. Cosell
  • Robert E. Schwartz

Organizations

  • BBN Technologies

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Acquisition
  • Algorithms
  • Classification
  • Computations
  • Computer Programs
  • Continuity
  • Contracts
  • Data Rate
  • Debugging
  • Excitation
  • Frequency
  • Frequency Bands
  • Security
  • Spectra
  • Speech Compression
  • Speech Quality
  • Statistics

Fields of Study

  • Engineering

Readers

  • Speech Processing/Speech Recognition.

Technology Areas

  • AI & ML