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Message from discussion G.723.1 and G.729 licensing
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Henning Schulzrinne  
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 More options Apr 30 1997, 3:00 am
Newsgroups: ucb.digital-video
From: schulzri...@cs.columbia.edu (Henning Schulzrinne)
Date: 1997/04/30
Subject: Re: G.723.1 and G.729 licensing
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Andrew Chittenden WAVE-SP wrote:

> Perhaps we ought to rename this group Voice over Intellectual Property!

Except that we don't have a voice over intellectual property...

> What's the position with completely independently developed code that can
> interwork with G.723.1 and G.729? Is that allowed to given away free? Or do
> the intellectual property holders have a right to monies anyway?

The short answer: a distinct 'no'. This is not copyright (expression)
[although the code is obviously copyrighted], but patents (ideas). You
do have an option: you can wait 17 or so years for the patents to
expire... Building stuff outside the US won't help either, in case you
are wondering.

Also, the likelihood of developing new codecs similar in performance to
G.723.1 or G.729 that do not infringe on at least one of their patents
(or some other patent) is highly unlikely. Cryptography and audio/video
coding are probably two of the most patent-riddled areas relevant to
communication protocols.

People have complained a lot about the cryptography (RSA, D-H, etc.)
patents. At least they applied only to the US and one could get a
reference library (RSAREF) free for noncommercial use. Same with DES and
IDEA. PGP wouldn't exist without this.

> Rgds, Andy Chittenden

> Email:  achit...@madge.com      Fax:    +44 1753 661011
> Multimedia Development, Madge Networks Ltd
> Sefton Park, Bells Hill, Stoke Poges, Slough SL2 4JS, England


 
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