[Freeswitch-users] G.729

[Steve Underwood]

That's a good question. Many of the patents listed in the ITU database 
have already expired. I think the last one in the ITU database to expire 
will be some time in 2016, so its pretty much 20 years after the spec 
was first published - i.e. people were patenting techniques used by the 
codec until close to its publication data. One or two of those final 
patents might be things you could design your way around. G.729A was 
published a little later, but I don't remember any patents specific to 
it. Not all the relevant patents are listed in the ITU database, so 
there might be further problematic ones, which won't expire until 2016.

The bottom line seems to be that it will be something like 2015 or 2016 
before the G.729. G.729A and G.729B specs are in the clear.

Steve


On 09/25/2011 10:44 PM, curriegrad2004 wrote:
> Steve, do you know around what year when the G.729 patents expire?
>
> On Sun, Sep 25, 2011 at 3:27 AM, Steve Underwood<steveu at coppice.org>  wrote:
>> Hi,
>>
>> On 09/23/2011 12:42 AM, curriegrad2004 wrote:
>>> There is no G729 trial codecs in FreeSWITCH. You need to pay royalties
>>> to SIPPRO regardless. There's always the option of waiting until
>>> somewhere 2014 for the patents to expire ;)
>>>
>> The last of the G.723.1 patents expires in 2014. There are G.729 patents
>> running a bit longer than that, but its hard to find the exact date.
>>
>> Steve