Re: [AVT] comments on draft-ietf-avt-rtp-speex-05.txt

[Randell Jesup <rjesup at wgate.com>]

Jean-Marc Valin <jean-marc.valin at usherbrooke.ca> writes:

>Alex Eleftheriadis a écrit :
>> Given that the Speex bitstream is "embedded", in the sense that
>> narrowband bitstreams are embedded in wideband bitstreams, has there
>> been any thought on allowing each bitstream component to be transported
>> over its own RTP session?

>No. This may make sense for H.264 which has huge data anyway (fragmented
>into multiple packets), but the Speex data is tiny and fits easily into
>one packet. Given the 16 kbps overhead of IP+UDP+RTP, it's just not
>worth it. Also, Speex wideband is embedded, but not scalable. If you
>peel something, it's only the high-frequencies. The narrwband part
>remains the same.

Also, using multiple streams without a good reason complicates session
setup when going through things like SBCs and ICE/TURN.

-- 
Randell Jesup, Worldgate (developers of the Ojo videophone), ex-Amiga OS team
rjesup at wgate.com
"The fetters imposed on liberty at home have ever been forged out of the weapons
provided for defence against real, pretended, or imaginary dangers from abroad."
		- James Madison, 4th US president (1751-1836)

_______________________________________________
Audio/Video Transport Working Group
avt at ietf.org
https://www.ietf.org/mailman/listinfo/avt