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Accession Number:
ADA067646
Title:
Delta Modulation Conferencing System.
Corporate Author:
LERNER TECHNOLOGY INC WILLIAMSVILLE NY
Report Date:
1978-01-01
Abstract:
This report describes a Delta Modulation Conferencing unit and Delta Modulator-Demodulator units which were constructed under this contract. The conferencing unit is based on a technique for combining a number of delta modulation speech signals into a single bit stream which, in effect, represents the sum of all the input speech signals. Thus any participant can hear all the participants even when a number are speaking at the same time. The system is a relatively simple one in which the processing can be completely digital, and does not involve recovery of the original speech signal. The technique takes advantages of the statistical property of a delta modulation voice signal that adjacent bits differ about 90 of the time and are the same only about 10 of the time.
Descriptive Note:
Final rept.
Pages:
0031
Contract Number:
N00173-77-C-0216
File Size:
10.71MB
