Title :
Multiple delta modulation of a speech signal
Author :
Jayant, N.S. ; Shipley, K.
Author_Institution :
Bell Telephone Labs., Murray Hill, N. J.
Abstract :
A speech signal was passed through a cascade of identical delta modulators. Signal degradation (as a function of the number of delta modulations I) was initially more rapid when the delta modulation was adaptive (ADM) than if it was linear (LDM). However, the rate of degradation was nearly constant in LDM, while for ADM it decreased monotonically with I (as in PCM); and at I=6, the ADM still maintained a significant SNR advantage.
Keywords :
Band pass filters; Computer simulation; Degradation; Delta modulation; Encoding; Equations; Low pass filters; Phase change materials; Speech; Statistics;
Journal_Title :
Proceedings of the IEEE
DOI :
10.1109/PROC.1971.8439
