[Ekiga-list] Aliasing in audio codecs

[Damien Sandras]

Le vendredi 26 janvier 2007 à 23:08 +0100, go music a écrit :
> I'm discovering Ekiga using it with success including audio/video for
> two days now on a Mandriva 2007 system, and I really congratulate
> everyone who give and have given their contribution to that great
> project! Diamondcard works fine as well BTW.
> Here is my question for upcoming developments.
> I have noticed that both SPEEX (8 and 16kHz bandwidth) and the iLBC
> codecs produce aliasing either due to inadapted frequency filtering of
> the audio bandwidth with respect to the raw sample rate or low (8?)
> bit conversion without interpolation or both. Is there any way to fix
> this? it would really be necessary to improve the audio quality of
> these codecs, and can be achieved by using matched filters and
> interpolation. 

That's probably a question for Jean-Marc Valin (I'm cc'ing him).
-- 
 _      Damien Sandras
(o-      
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