SECURE VOICE COMMUNICATION SYSTEM WITH LOW BIT RATE AND HIGH VOICE QUALITY (FROM CARNAHAN CONFERENCE ON ELECTRONIC CRIME COUNTERMEASURES, 1973 - PROCEEDINGS, BY J S JACKSON AND R W DEVORE - SEE NCJ-10890)

• NCJ Number: 27556
• Author(s): L K TIMOTHY; S F BOLL
• Date Published: 1973
• Length: 4 pages
• Corporate Author: University of Kentucky; Institute of Electrical and Electronics Engineers
• Publication Format: Document
• Language: English
• Country: United States of America

Annotation

A DIGITAL VOICE COMMUNICATION SYSTEM WHICH IS BASED ON ADAPTIVE LINEAR PREDICTIVE CODING IS DESCRIBED, WITH COMMENTS MADE RELATIVE TO COMPUTER IMPLEMENTATION PROBLEMS.

Abstract

THE BASIC THEORY INVOLVES MODELING THE SPEECH TRACK AS AN ALL POLE DIGITAL FILTER BEING DRIVEN BY A TIME SEQUENCE OF PULSES FROM THE VOCAL CORDS. THE SYSTEM PRODUCES HIGH VOICE QUALITY WITH CHANNEL RATES IN THE RANGE OF 2400 TO 5400 BITS PER SECOND. (AUTHOR ABSTRACT MODIFIED)