Accession Number:

ADA045079

Title:

A Digital Microprocessor Channel Vocoder

Descriptive Note:

Technical note

Corporate Author:

MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s):

Report Date:

1977-08-10

Pagination or Media Count:

90.0

Abstract:

A complete, real-time, channel vocoder delivering good speech quality with a 2400-bitsecond 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- 89 satellite communications system.

Subject Categories:

  • Electrical and Electronic Equipment
  • Computer Hardware
  • Voice Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE