On 2013-10-04 5:36 PM, "Steve Underwood" <[email protected]> wrote: > > On 10/05/2013 01:32 AM, Darryl Moore wrote: >> >> I'll explain. >> >> The g.729 compression algorithm is not protected by copyright, though >> specific instances may be. It is protected by a patent. >> >> http://www.sipro.com/G-729.html >> >> An open source version is available here: >> >> http://asterisk.hosting.lv/ >> >> What stops you from using this, or even your own implementation isn't >> copyright, but patent protection. It is the right to use the patented >> technology that you are licensing, not the particular copyrighted coded >> that implements it. > > The G.729 codec software at http://asterisk.hosting.lv/actually uses a codec implementation copyrighted by Intel. You need to obey their copyright conditions. >
correct, and for a few hundred dollars you are free to use it as you see fit, without royalties. note that i also said that the patent license applies even on code that you write yourself. >> Here you will find the various G.729 patents which were all granted in >> 1996. >> >> https://www.itu.int/ITU-T/recommendations/related_ps.aspx?id_prod=3334 >> >> >> I had thought these expired next year because I was thinking patents >> were only 18 years. Turns out they are now 20 years, so they really do >> not expire til some time in 2016. My bad. > > If you use G.729A (which practically everyone does) I think there are one or two patent which run beyond 2016, at least in the US. > perhaps. i do not claim to have fully researched either the patents or the protocol. is 729 compatible with 729a? out of curiosity though i will find out more about these other patents. >> So in countries that honour software patents, you need to have a license >> until some time in 2016. In countries which do not, you are free to use >> these open source codes now. > > What have the essential patents relevant to G.729 got to do with software patents? [blink] umm... they are software patents. > >> >> cheers. >> >> On Fri, 2013-10-04 at 15:55 +0200, Olivier wrote: >> >> >>> Hmmmm, I'm not sure how g729 licence and software patents relate to >>> each other. > > Regards, > Steve > > > -- > _____________________________________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > New to Asterisk? Join us for a live introductory webinar every Thurs: > http://www.asterisk.org/hello > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users
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