On 17/09/16 18:28, glen english wrote:
> Yeah.
>
> Cascading codecs is always trouble.
>
> BTW My understand of the word TRANSCODING is going between one encoded
> method and another without going back all the way to uncompressed. Going
> between different video encoding methods usually done
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
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
