Title :
A Single-Channel PCM Codec
Author :
Everard, John D.
Author_Institution :
British Post Office Res. Dept., Ipswich, England
fDate :
2/1/1979 12:00:00 AM
Abstract :
A single-channel PCM codec is described which is being manufactured for use in the new British Post Office (BPO) range of digital PABX´s. 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 :
MOS digital integrated circuits; MOS integrated circuits, digital; PCM coding/decoding; Circuits; Codecs; Costs; Decoding; Delta modulation; Large scale integration; Manufacturing; Phase change materials; Semiconductor device manufacture; Testing;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOM.1979.1094400
