Telephony by Pulse Code Modulation*

29 July 1947

journal article
website
Published by Institute of Electrical and Electronics Engineers (IEEE) in Bell System Technical Journal

Vol. 26 (3) , 395-409
https://doi.org/10.1002/j.1538-7305.1947.tb00902.x

Abstract

An experiment in transmitting speech by Pulse Code Modulation, or PCM, is described in this paper. Each sample amplitude of a pulse amplitude modulation or PAM signal is transmitted by a code group of ON-OFF pulses. 2ⁿ amplitude values can...