Digital Cellular Telecommunications System (Phase 2+); Adaptive Multi Rate (AMR) Speech; ANSI-C Code for the AMR Speech Codec (GSM 06.73 Version 7.1.1 Release 1998)
The present document contains an electronic copy of the ANSI-C code for the GSM Adaptive Multi-Rate codec. The ANSI-C code is necessary for a bit exact implementation of the Adaptive Multi Rate speech transcoder (GSM 06.90 [3])@ Voice Activity Detection (GSM 06.94 [7])@ comfort noise (GSM 06.92 [5])@ Discontinuous Transmission (GSM 06.93 [6]) and example solutions for substituting and muting of lost frames (GSM 06.91 [4]).