Advanced speech transmission techniques for GSM and beyond
M. Delprat, Cengiz Evci · 2002
The new features and technical improvements will take the world leading European developed GSM system in meeting worldwide new customer demands and will compete successfully with other existing and future cellular systems. Among all, the most significant enhancements are the current development of enhanced full-rate (EFR) GSM high quality speech codec. Both PCS1900 standards and ETSI have selected the US1 codec for this purpose despite some drawbacks. This paper describes the technological developments in the GSM from speech coding point of view along with advanced speech transmission techniques which will take GSM to the turn of century and even beyond.