Speex dev - Mar 2005 - Openphone implementation of Speex Codec's descriptions help

Would someone kindly share some definition into the following?

Openphone version 1.91 includes dual sets of Speex codec's starting with:

SpeexNarrow-5.95k{sw}
SpeexNarrow-5.95k{Xiph}
 
Through

SpeexNarrow-18.2k{sw}
SpeexNarrow-18.2k{Xiph}

I do not understand what the differences are between {sw} & {Xiph} given the
same bit rate for both?

Are all of these Narrow or Wide or Ultrawide sampling rates? My guess is
Narrow since that is what the tag suggests in openphone's gui application,
but still uncertain since the codec's are presented in pairs.

In the design and implementation of Speex Codec's does the code contain any
form of Pre and Post processing that may handle / curtail the loss of voice
packets on the start of audio stream (turn-up) and the end of audio stream
(tear-down) - our application may require constant stream interruption in
each direction. I presume this type of processing may possible and or
typically be accomplished outside of the Codec - appreciate your inputs.



Regards,
:-[PdV]-: REN
Peter D. Vouvounas
Vice President & GM
VoIPCO LLC
peterv@voipco.com

Hi, 

I honestly have no idea what the sw and Xiph "versions" are. It's
still
the same codec, same quality and (approximately) same bit-rate. The only
difference is probably in the way the frames are packed and/or the way
the negotiation is made. The modes that have "Narrow" in them are of
course narrowband.
> In the design and implementation of Speex Codec's does the code contain
any
> form of Pre and Post processing that may handle / curtail the loss of voice
> packets on the start of audio stream (turn-up) and the end of audio stream
> (tear-down) - our application may require constant stream interruption in
> each direction. I presume this type of processing may possible and or
> typically be accomplished outside of the Codec - appreciate your inputs.
I'm not sure what you mean here. 

	Jean-Marc

-- 
Jean-Marc Valin <Jean-Marc.Valin@USherbrooke.ca>
Universit? de Sherbrooke