Digital cellular telecommunications system (Phase 2+); Adaptive Multi-Rate (AMR); Speech processing functions; General description (GSM 06.71 version 7.0.2 Release 1998)
The present document is an introduction to GSM 06.90 [7], GSM 06.91 [8], GSM 06.92 [9], GSM 06.93 [10] and GSM 06.94 [11] specifications dealing with the speech processing functions in the adaptive multi-rate channel of the GSM system. A general overview of the speech processing functions is given, with reference to the documents where each function is specified in detail.