[Freeswitch-users] Audio Codecs over Mobile Connection

[Volodymyr Fedorov]

Question is what kind of mobile connection do you use? If it is UMTS/CDMA,
so even not compressed codecs like g711u/a or g722 are working fine.
Regarding bandwidth usage you have to choose between SILK,Opus or even old
one iLBC or GSM.



On Sat, Jan 30, 2016 at 9:40 AM, Stanislav Sinyagin <ssinyagin at gmail.com>
wrote:

> Of course jitter buffer is independent from codec, but its functionality
> affects the quality.
>
> Yes SILK is inherited by Opus, but in general SILK is much cheaper in
> terms of CPU cycles for encoding and decoding.
>
> You can see the difference here:
> https://txlab.wordpress.com/2015/04/10/testing-freeswitch-performance-on-scaleway-c1/
> On 30 Jan 2016 06:41, "Oleg Stolyar" <olegstolyar at gmail.com> wrote:
>
>> Thanks Stanislav!
>>
>> I understand that jitter buffer is not necessarily codec dependent and
>> that SILK is actually the foundation of Opus, so I assume their quality is
>> comparable.
>>
>> On Fri, Jan 29, 2016 at 8:26 PM, Stanislav Sinyagin <ssinyagin at gmail.com>
>> wrote:
>>
>>> add SILK to the list (it's actually what Skype uses), and jitter buffer.
>>>
>>> but I don't have much practical experience.
>>>
>>> The quality of the sound depends also on the particular SIP client
>>> implementation.
>>>
>>>
>>>
>>> On Fri, Jan 29, 2016 at 11:32 PM, Oleg Stolyar <olegstolyar at gmail.com>
>>> wrote:
>>> > Hi guys,
>>> >
>>> > does anyone have experience using different codecs to reduce
>>> choppiness and
>>> > metallic/robotic sound when connecting to FreeSWITCH from a mobile
>>> device?
>>> >
>>> > I know both OPUS and G.722 have packet loss concealment but I wonder if
>>> > someone actually has practical experience with different codecs over
>>> iffy
>>> > mobile connections.
>>> >
>>> > OPUS vs. G.722 vs G.711
>>> >
>>> >
>>> >
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>>
>>
>> _________________________________________________________________________
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>>
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>>
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>
> _________________________________________________________________________
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> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> Official FreeSWITCH Sites
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> http://confluence.freeswitch.org
> http://www.cluecon.com
>
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-- 
Best regards,
Volodymyr
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