[Asterisk-Users] Compare to Skype

[Ronald Wiplinger]

mgraves at mstvp.com wrote:
>> -------- Original Message --------
>>
>> Skype uses iLBC codec, which has great jitter compensation.  IIRC, the
>> newer SIP channels of * are supposed to have the same capabilities, but
>> I have not tested.  I really do not like Skype (prefer FWD), but I must
>> say, over satellite, etc, they provide quality..  All about the codec in
>> this case..
>>     
>
>
> Errr...no...this is wrong. 
>
> Skype uses ISAC from Global IP Sound. iLBC is something different see
> http://www.globalipsound.com/solutions/solutions_Codecs.php
>
> One of the reasons Skype sounds good is that its a closed system and so
> can leverage a wideband codec. Instead of the normal 8khz sample rate
> it uses 16khz. That makes for clearer sound. Since ISAC is a
> proprietary relative of iLBC its jitter compensation is also very good.
>
> My understanding is that Asterisk cannot presently use any wideband
> codecs as it is hard coded to the 8khz sample rate at its core.
> Adapting Asterisk to wideband capability has been discussed but will be
> a huge amount of work. Further, only if you know that the calls will
> stay wideband end-to-end will the benefits of wideband be apparent.
> That means no PSTN segments.
>
> Michael Graves
> mgraves at mstvp.com
>
>   

Sadly to say, but users do not care about the why, they only care about 
the quality! and they simple ask to "fix" it!

I hope there is soon a solution, otherwise, we have to skip all our 
effort and just use skype!!!!!
And I would hate to see that. I just lost 20 US$ to Ebay - the newly 
parent company of skype, for a not received parcel, but the rules says, 
below 25 US$ there is no guarantee that you get anything!!!!


bye

Ronald Wiplinger