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jbrower at signalogic.com
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 Posted: Mon Apr 07, 2014 11:15 pm Post subject: [asterisk-users] is g729 codec free? or under license??? |
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Darryl Moore <darryl <at> moores.ca> writes:
| Quote: |
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.
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.
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.
cheers.
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Darrel-
The G729 essential patents were *granted* in 1996, but applied for prior to
June 8 1995. That means their lifespan is either 20 years from their
application date, or 17 years from their grant date, whichever is greater
(http://www.uspto.gov/main/faq/p120013.htm).
Either way, they expire in 2014.
-Jeff
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steveu at coppice.org
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| Posted: Tue Apr 08, 2014 9:20 pm Post subject: [asterisk-users] is g729 codec free? or under license??? |
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Hi Jeff,
On 04/08/2014 12:13 PM, Jeff Brower wrote:
| Quote: | Darrel- The G729 essential patents were *granted* in 1996, but applied
for prior to June 8 1995. That means their lifespan is either 20 years
from their application date, or 17 years from their grant date,
whichever is greater (http://www.uspto.gov/main/faq/p120013.htm).
Either way, they expire in 2014. -Jeff
|
Where did you get the cutoff date of June 8 1995, and how does 20 years
from that date lead to the last of the patents expiring in 2014? Nobody
uses G.729. They use G.729A. The G.729A spec is somewhat later than the
original G.729, but I don't know if there are any additional patents
which specifically relate to Annex A. You could use G.729 instead, but
it roughly doubles the compute needed.
There are various things on the web saying the last of the patents on
G.723.1, which was around in draft form long before G.729, expires in
2014. However, there seem to be patents related to that codec which
don't really expire until some time in 2015. Its really hard to find
solid information. The ITU patent database rarely identifies the actual
patents being claimed, so its damned hard to look them up.
Regards,
Steve
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tzafrir.cohen at xorco...
Guest
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| Posted: Wed Apr 09, 2014 5:54 am Post subject: [asterisk-users] is g729 codec free? or under license??? |
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On Wed, Apr 09, 2014 at 10:19:59AM +0800, Steve Underwood wrote:
| Quote: | Hi Jeff,
On 04/08/2014 12:13 PM, Jeff Brower wrote:
| Quote: | Darrel- The G729 essential patents were *granted* in 1996, but
applied for prior to June 8 1995. That means their lifespan is
either 20 years from their application date, or 17 years from
their grant date, whichever is greater
(http://www.uspto.gov/main/faq/p120013.htm). Either way, they
expire in 2014. -Jeff
|
Where did you get the cutoff date of June 8 1995, and how does 20
years from that date lead to the last of the patents expiring in
2014? Nobody uses G.729. They use G.729A. The G.729A spec is
somewhat later than the original G.729, but I don't know if there
are any additional patents which specifically relate to Annex A. You
could use G.729 instead, but it roughly doubles the compute needed.
|
If it allows me to avoid the trolls: I'll pay that performance hit. In
many caces there are CPU cycles to spare. But the licensing is a hard
limit.
| Quote: |
There are various things on the web saying the last of the patents
on G.723.1, which was around in draft form long before G.729,
expires in 2014. However, there seem to be patents related to that
codec which don't really expire until some time in 2015. Its really
hard to find solid information. The ITU patent database rarely
identifies the actual patents being claimed, so its damned hard to
look them up.
|
Nice.
--
Tzafrir Cohen
icq#16849755 jabber:tzafrir.cohen@xorcom.com
+972-50-7952406 mailto:tzafrir.cohen@xorcom.com
http://www.xorcom.com
--
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-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
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steveu at coppice.org
Guest
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| Posted: Wed Apr 09, 2014 6:59 am Post subject: [asterisk-users] is g729 codec free? or under license??? |
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On 04/09/2014 06:54 PM, Tzafrir Cohen wrote:
| Quote: | On Wed, Apr 09, 2014 at 10:19:59AM +0800, Steve Underwood wrote:
| Quote: | Hi Jeff,
On 04/08/2014 12:13 PM, Jeff Brower wrote:
| Quote: | Darrel- The G729 essential patents were *granted* in 1996, but
applied for prior to June 8 1995. That means their lifespan is
either 20 years from their application date, or 17 years from
their grant date, whichever is greater
(http://www.uspto.gov/main/faq/p120013.htm). Either way, they
expire in 2014. -Jeff
|
Where did you get the cutoff date of June 8 1995, and how does 20
years from that date lead to the last of the patents expiring in
2014? Nobody uses G.729. They use G.729A. The G.729A spec is
somewhat later than the original G.729, but I don't know if there
are any additional patents which specifically relate to Annex A. You
could use G.729 instead, but it roughly doubles the compute needed.
|
If it allows me to avoid the trolls: I'll pay that performance hit. In
many caces there are CPU cycles to spare. But the licensing is a hard
limit.
|
Well, you do get the benefit of higher quality for your extra compute.
G.729 sounds distinctly better than G.729A on a lot of material.
| Quote: | | Quote: | There are various things on the web saying the last of the patents
on G.723.1, which was around in draft form long before G.729,
expires in 2014. However, there seem to be patents related to that
codec which don't really expire until some time in 2015. Its really
hard to find solid information. The ITU patent database rarely
identifies the actual patents being claimed, so its damned hard to
look them up.
|
Nice.
|
Regards,
Steve
--
_____________________________________________________________________
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
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asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
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