A Digital Microprocessor Channel Vocoder

Abstract

A complete, real-time, channel vocoder delivering good speech quality with a 2400-bit/second data transmission rate was implemented using purely digital circuitry in the form of a high-speed programmed microprocessor. Necessary algorithms are presented and their effect on the machine design is discussed in detail. The end product is a very high-speed computing machine (measured in program throughput terms). It turned out to have a high degree of programming flexibility, which would make it adaptable to other tasks. This was a bonus, not an original goal. The project was conceived and successfully realized as the most practical way to build a vocoder for actual use in the LES- 8/9 satellite communications system.

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Document Details

Document Type
Technical Report
Publication Date
Aug 10, 1977
Accession Number
ADA045079

Entities

People

  • Jerzy Gorski-popiel

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Space

DTIC Thesaurus Topics

  • Accumulators
  • Acquisition
  • Algorithms
  • Arithmetic
  • Coding
  • Computations
  • Computer Programming
  • Computers
  • Data Transmission
  • Decoders
  • Decoding
  • Diagrams
  • Filters
  • Instructions
  • Signal Processing
  • Spectrum Analysis
  • Speech Quality

Fields of Study

  • Computer science

Readers

  • Software Engineering
  • Speech Processing/Speech Recognition.
  • Systems Analysis and Design

Technology Areas

  • Space