Title :
Companded pulse-code modulation voice codec using monolithic weighted capacitor arrays
Author :
Gray, Paul R. ; Hodges, David A. ; Tsividis, John P. ; Chacko, Jacob, Jr.
fDate :
12/1/1975 12:00:00 AM
Abstract :
Monolithic arrays of binary-weighted MOS capacitors may be used in nonlinear as well as linear A/D and D/A converters. A proposed design for a standard 15-segment approximation to the μ255 law coder for pulse-code modulation (PCM) telephony is presented here. Analysis and simulation suggest that a per-channel voice coder should be realizable in a single MOS chip. The decoder is similar to the coder.
Keywords :
Analogue-digital conversion; Carrier telephony; Compandors; Convertors; Digital communication systems; Encoding; Field effect transistors; Monolithic integrated circuits; Pulse-code modulation; analogue-digital conversion; carrier telephony; compandors; convertors; digital communication systems; encoding; field effect transistors; monolithic integrated circuits; pulse-code modulation; Analytical models; Code standards; Codecs; Decoding; MOS capacitors; Modulation coding; Phase change materials; Pulse modulation; Speech analysis; Telephony;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.1975.1050646
