See
https://datatracker.ietf.org/ipr/search/?option=rfc_search&rfc_search=3951
for page of Global IP Sound's Statement About IPR Claimed in
draft-ietf-avt-ilbc-codec
https://datatracker.ietf.org/ipr/319/ and for Global IP Sound AB's
Patent Statement pertaining to draft-andersen-ilbc-00.txt
https://datatracker.ietf.org/ipr/64/
Kevin, are you stating these assurances are no longer valid?
George T. Willingmyre, P.E.
President, GTW Associates
Spencerville, MD USA 20868
301.421.4138
www.gtwassociates.com
----- Original Message -----
From: "Kevin P. Fleming" <kpfleming(_at_)digium(_dot_)com>
To: <ietf(_at_)ietf(_dot_)org>
Sent: Wednesday, September 07, 2011 11:18 AM
Subject: RFC 3951 source code usage situation just got murkier
RFC 3951 is the specification of iLBC, and includes the reference
implementation in C source code. This is distributed by the IETF under its
normal license terms (BSD-style). However, the creators of the codec
claimed to have patents that would be infringed by distribution/usage of
that code (and made appropriate IPR disclosures to the IETF), and they
offered a free patent non-assert license via the 'ilbcfreeware.org' web
site. Many people have been taking advantage of this license for years
now, in order to ensure they could safely use the code from RFC 3951.
After Google's acquisition of GIPS, the situation has changed. There is a
new implementation of iLBC on the WebRTC site, under a different license,
with an explicit patent grant. However, that patent grant applies *only*
to the WebRTC implementation, not the implementation in RFC 3951. The
previous license mechanism on 'ilbcfreeware.org' has been removed and is
no longer available.
This leaves the community in the unfortunate situation of having an RFC
that contains a reference implementation, which has had IPR disclosures
made against it, but for which no free licensing terms are available (even
though they were in the past).
--
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
Jabber: kfleming(_at_)digium(_dot_)com | SIP: kpfleming(_at_)digium(_dot_)com |
Skype: kpfleming
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at www.digium.com & www.asterisk.org
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