Hi, Check if you have set the clock rate in the conference bridge and on the audio device, so they both are 8 kHz, like codec. If you don't do this you might run a higer sampling rate. If you have different sampling rate on codec - conf. bridge . sound device you might also end up with multiple up/down sampling filters. BR/Olle _____ From: pjsip-bounces@xxxxxxxxxxxxxxx [mailto:pjsip-bounces at lists.pjsip.org] On Behalf Of lcj.liu at gmail.com Sent: den 3 september 2009 04:41 To: pjsip at lists.pjsip.org Subject: Echo cancel consumes too much cpu on ARM I'm using pjsua sample application(SVN 2913) on 270MHZ ARM926EJ-S with Linux 2.6.10. The pjsip is built with arm gcc 4.2. PCMU is used during dialog. If -echo-tail =0, only about 1% cpu is consumed by pjsua. If -echo-tail=20, about 50% cpu is consumed. If -echo-tail=60, about 100% cpu is consumed. I reviewed the report "PJMEDIA Performance Measurement"(http://trac.pjsip.org/repos/wiki/PJMEDIA-MIPS). This report gives much better result than mine on ARM . For 8KHZ echo canceller 100ms tail len, it consumes only about 30% cpu. Where is the problem? Best Regards. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20090903/848a1d9f/attachment-0001.html>
