Global IP Solutions, the creator of iLBC, was acquired by Google in January 2011. Google continues to support the iLBC effort and is offering it as part of it's WebRTC open source effort. iLBC is now available under the same license as the WebRTC project. On this page, you will find material taken from the old ilbcfreeware.org page.
Below, you will find legacy information copied from ilbcfreeware.org for archival and reference purposes.
iLBC (internet Low Bitrate Codec) is a FREE speech codec suitable for robust voice communication over IP. The codec is designed for narrow band speech and results in a payload bit rate of 13.33 kbit/s with an encoding frame length of 30 ms and 15.20 kbps with an encoding length of 20 ms. The iLBC codec enables graceful speech quality degradation in the case of lost frames, which occurs in connection with lost or delayed IP packets.
Please read on how you can get the source code and contribute to the code by reading the build information.