[Speex-dev] RTP profile draft!

Jean-Marc Valin Jean-Marc.Valin at USherbrooke.ca
Wed Nov 30 13:45:05 PST 2005

Hi Aymeric,

> mode:  Speex encoding mode.  Can be {1,2,3,4,5,6,any} defaults to
>        3 in narrowband, 6 in wide and ultra-wide.
> Is mode equivalent to the "quality" parameter of speex?

No. The quality parameters all map to a certain mode, but they are not
the same. See http://www.speex.org/manual2/node9.html for a list of the

> Just for additionnal note, it seems the word "mode" is also
> used for talking about the *-band things:
>    "Each frame contains both "mode" (narrowband, wideband or
>     ultra-wideband)"
> that's an additionnal confusion that may need a fix...

I think the draft only uses "mode" for bitrate and uses "bandwidth" for
narrowband vs wideband. I guess it may be confusing that libspeex uses
mode for the sampling rate and sub-mode for the bitrate. Can you suggest
a better term to use in the draft?


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