It's a good question Glen, off the top of my head I'm not sure. When one or more codecs are combined it's called transcoding and IIRC often causes problems.
Alaw/mulaw are rather non-linear operations. That could upset the parameter estimation algorithms. - David On 17/09/16 11:38, glen english wrote: > David > you are the man to ask this one > > Why do (or why do you think) relatively benign companding algorithms > like Alaw, uLaw, that are commonly used for encoding for VOIP links for > radio systems (and other) , sounds so awful when they pass AMBE/ AMBE2 > etc processed speech ? > > Must be something to do we the re distribution of the quantizating noise > characteristics? > > Not sure what the effect is yet with codec2, but that would be a cinch > to test up. > > > g > > > > > ------------------------------------------------------------------------------ > _______________________________________________ > Freetel-codec2 mailing list > Freetel-codec2@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > ------------------------------------------------------------------------------ _______________________________________________ Freetel-codec2 mailing list Freetel-codec2@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freetel-codec2
