[Asterisk-Users] Asterisk compare with Skype

[Michel Brabants]

Steve Underwood wrote:
> Caleb wrote:
>
>> Speaking of audio quality, does anybody know why Skype's audio quality
>> is better than that of Asterisk to most users? I have been trying to
>> figure that out but dont seem to get what may be left out, even on
>> GSM. Am I looking the wrong direction to begin with?
>>
>>
> Skype uses wideband voice. This means you can do things like tell an "f"
> from an "s", which you cannot do on a normal telephone line. The whole
> voice sound is much more "hi-fi". The codec they use is the wideband
> version of iLBC. Although narrowband iLBC is free to use, wideband iLBC
> is not.
>
> Regards,
> Steve
>
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Heya,

I don't really know a lot of this, but I tried encoding with speex a
little bit. I saw that the speex-commandline-encoder has options for
narrow/wide/ultrawide-band. It supports traffic from ~2.5 kB/s up to ~45
kB/s (I suppose it is kilobytes).  I think it also has other nice
properties which are mentionned on the speex.org-site. The gain-control
is also helpfull maybe, ... I don't know if any hardware phones support
speex although this would be interesting maybe. Maybe this wasn't
considered because Asterisk can't use speex in conference-sessions? I
hope it is helpfull. Does asterisk support conferencing using the
speex-codec and if not, is this planned?

thanks,

Michel
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