Content for TS 46.006 Word version: 16.0.0
1 Scope Word‑p. 5
The present document 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 [2]), Voice Activity Detector (GSM 06.42 [6]), comfort noise (GSM 06.22 [4]), Discontinuous Transmission (GSM 06.41 [5]) and example solutions for substituting and muting of lost frames (GSM 06.21 [3]).
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
- References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
- For a specific reference, subsequent revisions do not apply.
- For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
[1]
GSM 01.04: "Digital cellular telecommunication system (Phase 2+); Abbreviations and acronyms".
[2]
GSM 06.20: "Digital cellular telecommunications system (Phase 2+); Half rate speech; Half rate speech transcoding".
[3]
GSM 06.21: "Digital cellular telecommunications system (Phase 2+); Half rate speech; Substitution and muting of lost frame for half rate speech traffic channels".
[4]
GSM 06.22: "Digital cellular telecommunications system (Phase 2+); Half rate speech; Comfort noise aspects for half rate speech traffic channels".
[5]
GSM 06.41: "Digital cellular telecommunications system (Phase 2+); Half rate speech; Discontinuous Transmission (DTX) for half rate speech traffic channels".
[6]
GSM 06.42: "Digital cellular telecommunications system (Phase 2+); Half rate speech; Voice Activity Detector (VAD) for half rate speech traffic channels".
[7]
GSM 06.07: "Digital cellular telecommunications system (Phase 2+); Half rate speech; Test sequences for the GSM half rate speech codec".
[8]
American National Standards Institute ANSI 9899 (1990): "Programming Language C (ISO)".
3 Definitions and abbreviations
3.1 Definitions
Definition of terms used in the present document can be found in GSM 06.20 [2], GSM 06.21 [3], GSM 06.22 [4], GSM 06.41 [5] and GSM 06.42 [6].
3.2 Abbreviations Word‑p. 6
For the purposes of the present document, the following abbreviations apply:
ANSI
American National Standards Institute
DS HD
Double Sided High Density
ETS
European Telecommunication Standard
GSM
Global System for Mobile communications
I/O
Input/Output
ROM
Read Only Memory
For abbreviations not given in this clause, see GSM 01.04 [1].
