[asterisk-dev] 16khz/8khz Translation path

[David Vossel]

----- Original Message -----
> From: asterisk at ntplx.net
> To: "Asterisk Developers Mailing List" digium.com>
> Sent: Sunday, September 26, 2010 1:23:41 PM
> Subject: [asterisk-dev] 16khz/8khz Translation path
> Looking at the translation in 1.8, asterisk uses G722 between SLIN and
> SLIN16 and back... I saw that codec_resample was not compiled because
> the
> non-included resample library was not installed. I built libresample
> and
> now codec_resample is correctly installed.
> 
> But G722 still shows as the fastest path. If I unload G722 then the
> direct SLIN/SLIN16 translation is used (codec_resample).
> 
> Has anyone else looked into this?
> 
> 


I have noticed this as well and this needs to be investigated.  It is possible that the second of audio we use to calculate the the least cost translation path is not accurate enough.   If it turns out that G722 is actually somehow more cost efficient than using the libresample library then we need to come up with a way to force lossless codec translations when they are available.


David Vossel
Digium, Inc. | Software Developer, Open Source Software
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at: www.digium.com & www.asterisk.org