[asterisk-users] Wideband g711-HD vs. g711.1?

Steve Underwood steveu at coppice.org
Tue Mar 17 08:43:59 CDT 2009


Philipp von Klitzing wrote:
> Hi!
>
>   
>>> has anyone seen specifications of the codec g711-HD? This is right now
>>> spreading fast in the wake up CATiq (the DECT successor), for example in
>>> the AVM products (www.avm.de).
>>>   
>>>       
>> Googling for G.711-HD only produces hits about AVM. The AVM web site is
>> very vague.
>>     
>
> AVM support answered: g711-HD is g711 A-Law sampled with 16 kHz.
>
> Currently AVM does not have intentions to support Siren7, Siren14, SILK 
> or CELT in the near future, they will stick to g722 and (g711-HD between 
> their own devices with double the bandwidth of g722 when this is readily 
> available).
>
>   
>> G.711.1 is a really brain dead codec. I find it hard to believe there will
>> ever be much take up of it.
>>     
>
> Still I am curious: What exactly is braindead about it?
>   
See for yourself. The spec free, though the ITU patents database lists 
patents on its methods - http://www.itu.int/rec/T-REC-G.711.1-200803-P/en

Steve




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