[Freeswitch-users] Hardware phones that do 48Khz Celt: Was Re: Is there any license G729?

[Tim St. Pierre]

Even if you did have a phone that could do it, you would have to design 
a completely different handset with high end audio components to hear 
any difference.

Having said that, I can see an application for a hardware "phone" that 
has balanced line in and out connections, so you could use it for 
broadcast applications.  This could replace all the hybrids you normally 
have in an audio control room, and allow for full-quality phone links if 
both sides support it.



curriegrad2004 wrote:
> Unless you want to spend loads of money on prototyping an VoIP IC that
> does 48KHz, then be my guest and build one
>
> On Mon, Sep 26, 2011 at 9:32 AM, Steve Underwood <steveu at coppice.org> wrote:
>   
>> On 06/30/2009 09:26 AM, Craig Askings wrote:
>>     
>>> Are there any hardware phones that support 48 Khz Celt and
>>> automated/mass deployment?
>>>
>>> Craig.
>>>       
>> Most of the pure VoIP chipsets aren't capable of running at 48k
>> samples/second, so off the shelf phone hardware platforms probably won't
>> cut it. The phones with video capabilities might have 48k sample/second
>> facilities.
>>     
>>> 2009/6/30 Jason White<jason at jasonjgw.net>:
>>>       
>>>> Brian West<brian at freeswitch.org>  wrote:
>>>>         
>>>>> Everyone has this need for lower bandwidth calls... I tend to march the
>>>>> other way. 48kHz baby!  (btw you can do 48kHz in the same bandwidth as a
>>>>> single ulaw call)
>>>>>           
>>>> 48khz Celt (celt at 48000 in your codec preferences) sounds wonderful with
>>>> FreeSWITCH. To test, run two FreeSWITCH instances, both with mod_portaudio.
>>>> This also works well in 48khz conferences.
>>>>
>>>> I wouldn't use G.729 even if it weren't encumbered by patents - it's G.711,
>>>> G.722, G.722.1 and (my current favourite) Celt all the way.
>>>>         
>> Steve
>>
>>
>>
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>>     
>
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