Digital Cellular Telecommunications System (Phase 2); Half Rate Speech; Part 7: ANSI-C Code for the GSM Half Rate Speech Codec (Second Edition; GSM 06.06 Version 4.2.0)
This European Telecommunication Standard (ETS) part 7 contains an electronic copy of the ANSI-C code for the GSM half rate codec. The ANSI-C code is necessary for a bit exact implementation of the half rate speech transcoder (GSM 06.20 (ETS 300 581-2) [2])@ Voice Activity Detection (GSM 06.42 (ETS 300 581- 6) [6])@ comfort noise (GSM 06.22 (ETS 300 581-4) [4])@ Discontinuous Transmission (GSM 06.41 (ETS 300 581-5) [5]) and example solutions for substituting and muting of lost frames (GSM 06.21 (ETS 300 581-3) [3])