Title :
A segmented /spl mu/-255 law PCM voice encoder utilizing NMOS technology
Author :
Tsividis, Yannis P. ; Gray, Paul R. ; Hodges, David A. ; Chacko, Jacob, Jr.
Abstract :
A technique for pulse code modulation (PCM) encoding according to the 15-segment approximation to the /spl mu/-255 nonlinear encoding law is described. The technique makes possible the realization of a one-channel encoder together with the associated sample/hold function as a single NMOS integrated circuit. The requirements imposed on the individual components for satisfactory system performance are investigated, and it is shown that a performance can be achieved which is comparable with that required in toll quality PCM telephone transmission. Experimental results from a partially integrated prototype are presented.
Keywords :
Digital communication systems; Encoding; Field effect integrated circuits; Large scale integration; Pulse-code modulation; Telephone equipment; Voice communication; digital communication systems; encoding; field effect integrated circuits; large scale integration; pulse-code modulation; telephone equipment; voice communication; Analog-digital conversion; Decoding; Encoding; Jacobian matrices; Laboratories; MOS capacitors; MOS devices; Phase change materials; Pulse modulation; Transversal filters;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.1976.1050812
