TS 26.073
ANSI-C Code
for the Adaptive Multi Rate (AMR)
Speech Codec

V19.0.0 (PDF) 2025/09 28 p.

V18.0.0 2024/03 28 p.

V17.0.0 2022/03 28 p.

V16.0.0 2020/06 28 p.

V15.0.0 2018/06 27 p.

V14.0.0 2017/03 28 p.

V13.0.0 2015/12 27 p.

V12.0.0 2014/09 27 p.

V11.0.0 2012/09 27 p.

V10.0.0 2011/04 27 p.

V9.0.0 2009/12 27 p.

V8.0.0 2008/12 27 p.

V7.0.0 2007/06 27 p.

V6.0.0 2005/01 26 p.

V5.3.0 2004/04 26 p.

V4.1.0 2002/01 26 p.

V3.3.0 2002/01 26 p.

GSM Rel-98 v7.6.0 2002/01 26 p.

full Table of Contents for TS 26.073 Word version: 19.0.0

each clause number in 'red' refers to the equivalent title in the Partial Content

Scope p. 5

References p. 5

Definitions and abbreviations p. 5

3.1	Definitions p. 5
3.2	Abbreviations p. 5

C code structure p. 6

Contents of the C source code p. 6

Program execution p. 6

Coding style p. 7

Code hierarchy p. 7

Variables, constants and tables p. 11

4.5.1	Description of constants used in the C-code p. 11
4.5.2	Description of fixed tables used in the C-code p. 11
4.5.3	Static variables used in the C-code p. 13

Homing procedure p. 17

File formats p. 23

6.1	Speech file (encoder input / decoder output) p. 23
6.2	Mode control file (encoder input) p. 23
6.3	Parameter bitstream file (encoder output / decoder input) p. 23

Change history p. 25