[Freeswitch-users] g729 and AMR codec requirements

[Michael Jerris]

Yes, I have seen it work.  We can't offer legal advice about what IPR is required to use it, but I suspect it requires licenses regardless of purpose.  You'd have to contact the patent holders for licensing details.


On Mar 19, 2013, at 5:39 AM, Daniel Ivanov <sertys at gmail.com> wrote:

> But has anyone actually succeded in obtaining AMR. I am not too crazy about AMR, because improvement over g.729 is very slight. Undernote : can you compile mod_amr for tanscoding against the lib if you don't care about licensing(test/educational purposes)?
> 
> On Mar 19, 2013 9:31 AM, "Steven Ayre" <steveayre at gmail.com> wrote:
> And G729 most definitely is not a HD codec either. :o)
> 
> Abdul, have you seen this list of supported codecs?
> http://wiki.freeswitch.org/wiki/Codecs#Transcodable_codecs
> 
> G.722, AMR-WB, SILK, CELT, iSAC, Broadvoice are supported HD codecs.
> 
> FreeSWITCH doesn't have any transcoding implementations of AMR-WB. The others do.
> 
> For AMR(-WB) you'd need either a 3rd-party software implementation or the Sangoma transcoding hardware. FreeSWITCH's modules can be compiled against a AMR library implementation if you can find that library and obtain the required licenses. If you're worried about load, the Sangoma hardware takes most of the workload off of the CPU onto the chipset. Either way as already noted you're going to have to obtain the AMR licenses yourself.
> 
> -Steve
> 
> 
> 
> On 18 March 2013 23:57, Steve Underwood <steveu at coppice.org> wrote:
> Hi,
> 
> AMR is not an HD codec. There is a wideband version of AMR, called
> AMR-WB, but when people just says AMR they are talking about the narrow
> band codec.
> 
> Steve
> 
> On 03/19/2013 05:29 AM, Abdul Basit wrote:
> > Thank you for responses.
> >
> > What other HD codes are supported? actually blackberry has AMR support
> > only. Thats why AMR should be in the shelf.
> > Also is there any option to buy bulk license for g729 rather than
> > managing 2500 licenses.
> >
> > Any idea on hardware, CPU and RAM required to deal with such conf. load?
> >
> >
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