FreeCalypso > hg > themwi-system-sw

annotate doc/Codec-library-depend @ 173:36cce9b0bbe2

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
doc/RTP-BFI-extension: article written
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 21 Nov 2022 12:17:55 -0800
parents 4f1f3f799295
children 623c64ae6102
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
171
4f1f3f799295 doc/Codec-library-depend: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 One important component of Themyscira Wireless system sw, specifically
4f1f3f799295 doc/Codec-library-depend: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 themwi-mgw, implements speech transcoding between GSM codecs on the inside and
4f1f3f799295 doc/Codec-library-depend: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 G.711 on the outside. This essential function creates a dependency on some
4f1f3f799295 doc/Codec-library-depend: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 specialized libraries that implement the codecs which need to be supported.
4f1f3f799295 doc/Codec-library-depend: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 The following codec libraries are currently required:
4f1f3f799295 doc/Codec-library-depend: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6
4f1f3f799295 doc/Codec-library-depend: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 1) libgsm, the original GSM 06.10 implementation from 1990s;
4f1f3f799295 doc/Codec-library-depend: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8
4f1f3f799295 doc/Codec-library-depend: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 2) gsm-codec-lib developed by Mother Mychaela:
4f1f3f799295 doc/Codec-library-depend: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10
4f1f3f799295 doc/Codec-library-depend: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 https://www.freecalypso.org/hg/gsm-codec-lib/
4f1f3f799295 doc/Codec-library-depend: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12
4f1f3f799295 doc/Codec-library-depend: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 This gsm-codec-lib collection provides two libraries; as of this writing, one
4f1f3f799295 doc/Codec-library-depend: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 is already implemented while the other is in the plans:
4f1f3f799295 doc/Codec-library-depend: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15
4f1f3f799295 doc/Codec-library-depend: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 2a) libgsmfrp is the Rx DTX handler for the original FR codec, a front-end
4f1f3f799295 doc/Codec-library-depend: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 preprocessor that sits in front of libgsm decoder. This preprocessor
4f1f3f799295 doc/Codec-library-depend: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 implements functions specified in GSM 06.11, 06.12 and 06.13, and these
4f1f3f799295 doc/Codec-library-depend: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 functions are required (not optional) for a network-side implementation of
4f1f3f799295 doc/Codec-library-depend: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 GSM FR codec in a TRAU-like component.
4f1f3f799295 doc/Codec-library-depend: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21
4f1f3f799295 doc/Codec-library-depend: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 2b) libgsmefr will be a librified (turned into a library) version of the
4f1f3f799295 doc/Codec-library-depend: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 official reference implementation (from ETSI) of GSM EFR codec.