Software

iLBC Source Code

The iLBC ANSI C Source code is available through IETF RFC page. In order to extract C code form the draft please use the following extract-cfile (courtesy of Wenju Jiang, Columbia University) and for the command syntax check readme file.

Note: You will have to convert the extract-cfile.txt to extract-cfile.awk.

iLBC Utilities

The following package can be used to verify that your compiled iLBC code works correctly.

Included are:

iLBC_test.txt -- Test script which can be used to produce the .BIT and .OUT files
iLBC_test.exe -- Reference executable created from the code in rfc3951.txt
iLBC.INP -- Input speech file
*.chn -- Channel files
*.BIT -- Output bit-stream from the encoder
*.OUT -- Output speech from the decoder

Note that the iLBC code in rfc3951.txt is a floating point implementation. Due to differences in compilers and optimization settings your output is likely to differ slightly from the output in the package. Generally the .BIT files are bit-exact while the .OUT files might differ +/-1 for some of the samples, but larger differences might be present in some rare occasions. Keep this in mind when doing the verification.

Implementations

Here is the list of available implementations of iLBC.

Demo

Applications/Systems

HW IP Phones/IADs

Chip

Open Source

SIPfoundry
Public Domain SIP client Kphone
Asterisk an open source software IP-PBX, dual-licensed by Digium under the GPL or a commercial license
OpenH323 package
GnomMeeting Open Source videoconferencing and VOIP application

Info

More speech and sound processing tech.
iLBC - White Paper
If you are interested in fix point ANSI C, TI DSP, Motorola Starcore, etc. implementations please send a mail to Global IP Sound here.