Hi,
Regardless of the exact status of the PLC IPR, I don't think it would be a good
idea to just say that "the Internet should just follow ITU-T standards with a
20-year lag". As it has been already shown with the codec proposals received to
date, it should be possible to create RF codecs that are *much* better than
G.722 and G.711.
Jean-Marc
Quoting Steve Underwood <steveu(_at_)coppice(_dot_)org>:
On 01/11/2010 11:00 PM, Christian Hoene wrote:
Dear Herve Taddei,
Besides, I don't think you would have any trouble to propose at ITU-T some
new appendices to G.711 and G.722 that could fit your goals. An appendix
is
non normative (a bit like the informative reference to G.711 PLC in iLBC).
By the way, if I am not wrong, some basic ITU-T G.722 PLCs are RF.
This was my understanding, too.
The G.722 spec is 23 years old, so it would be difficult for any of the
patents on that spec to still be valid. The ITU patent database does
list US patent 5528629 as related to G.722, but I assume this is an
error. The patent dates from so long after G.722 came out, and its
contents do not appear relevant to G.722. However, the recent additions
for PLC are:
G.722 (1988) App IV - Broadcom has claims
G.722 Appendix III - Broadcom has claims
G.722 Appendix IV - France Telecom has claims.
Have you seen any clear statements that those patents may be used
royalty free?
Steve
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