Title :
A single-channel PCM codec
Author :
Everard, John D.
Abstract :
A single channel PCM codec is described which is being manufactured for use in the new British Post Office range of digital PABXs. The codec works on the principle of converting to and from PCM using an intermediate delta sigma modulation code format. This technique allows relatively simple analog circuitry to be used in conjunction with a digital LSI chip to perform the conversion between the intermediate code and PCM. The codec meets all the relevant CCITT Recommendations with significant operating margins.
Keywords :
Code convertors; Digital communication systems; Digital integrated circuits; Encoding; Large scale integration; Private telephone exchanges; Pulse-code modulation; code convertors; digital communication systems; digital integrated circuits; encoding; large scale integration; private telephone exchanges; pulse-code modulation; Biographies; Circuit testing; Codecs; Decoding; Electrical engineering; Interpolation; Large scale integration; Phase change materials; Physics;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.1979.1051138
