"Google's WebRTC codecs and intellectual property are all
royalty-free, come with a patent grant and the source code is
available under a BSD licence. Google obtained the underlying audio
technology when it acquired Global IP Solutions in May 2010. GIPS
was known for it's narrowband iLBC and wideband iSAC voice codecs.
These codecs, along with Google's VP8 video codec are brought
together in a communications stack which includes network
connection technology, in part from Google Talk's libjingle. The
network components manage NAT and firewall traversal, implement
buffering and error concealment for the audio and video streams and
offer support for peer to peer connections."