Speech-and-channel coding scheme for enhancedfull-rate GSM standard
David Marston, D.Y.-K. Wong, W.T.K. Wong · Electronics Letters · 1995
The enhanced full-rate (EFR) GSM speech channel operates at the same gross data rate as the existing full-rate channel, TCH-FS. It is an upgrade for the latter in both speech quality and channel robustness. In this investigation, a speech and channel coding scheme is devised to produce almost toll quality speech even in severe channel conditions.