Speex dev - May 2005 - cpu utilization across speex versions

Hi all,

We are using Speex codec for our P2P Audio conferencing application. Thus, a
node may serve multiple neighbors, requiring multiple encode/decode at a time.

I have observed that Speex consumes alot of CPU power; one machine is Pentium 3
800MHz, 256MB RAM with XP. When this PC serves the other two faster PC's,
CPU utilization soars to maximum. I have tried various versions of speex; 1.0.1,
1.0.4, 1.0.5, and interesting enough, I found that 1.0.1 did a better job,
keeping CPU utilization at acceptable levels, unlike 1.0.4 & 1.0.5. Is this
behaviour normal? Moreover, does anyone have any figures for minimum system
requirements for speex coding in real-time for multiple parties? Or might I be
doing something wrong/inefficient?

By the way, the audio settings are: 32KHz uwband mode, 16 bits, Mono, speex
quality 8, speex encoder complexity 4 (almost same results with complexity 2 or
1).

Any pointers greatly appreciated, thank you.

-Kemal.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
http://lists.xiph.org/pipermail/speex-dev/attachments/20050529/9ab88bae/attachment.htm