Title :
Survey of voiceband data signal compression
Author :
Ng, Kent W. ; Card, H.C.
Author_Institution :
Dept. of Electr. & Comput. Eng., Manitoba Univ., Winnipeg, Man., Canada
Abstract :
Today´s public switched telephone networks are being upgraded to use digital transmission and switching. The main disadvantage of digital transmission is the higher bandwidth required. To alleviate this problem, much research has been devoted into the compression of digitized voice signals. However, such compression techniques tend to have adverse effects on non-voice signals such as modems and faxes. Only recently has the area of voiceband data signal compression been explored. This paper covers some of the highlights of these publications including DPCM, delta modulation, low delay code excited linear prediction, and vector quantisation
Keywords :
data compression; delta modulation; differential pulse code modulation; digital communication; linear predictive coding; telephone networks; vector quantisation; CELP; DPCM; VQ; bandwidth; delta modulation; digital switching; digital transmission; digital voice signal compression; faxes; low delay code excited linear prediction; modems; nonvoice signals; public switched telephone networks; vector quantisation; voiceband data signal compression; Bandwidth; Modems; Modulation coding; North America; Phase change materials; Pulse modulation; Speech coding; Telecommunication switching; Telephony; Vector quantization;
Conference_Titel :
WESCANEX 95. Communications, Power, and Computing. Conference Proceedings., IEEE
Conference_Location :
Winnipeg, Man.
Print_ISBN :
0-7803-2725-X
DOI :
10.1109/WESCAN.1995.494056
