Hi! I managed to get good quality with Speex/8000 on an Atmel 9263(linux). I changed the thread parameters in portaudio to use the SCHED_RR policy. The sound quality is good but the CPU load went up to 90%. There seems to be some work to de done with optimizing portaudio. Did you compile linphone to use portaudio too ? Regards, Dan On Tue, 2007-12-04 at 11:43 -0800, Thomas Reitmayr wrote: > Hi Olle, > some time ago I did some tests with Speex and different bit-rates, and > I had similar results - even though at 8 kb the CPU usage was below 50 > % the audio quality was not satisfying. These test were done using > linphonec, not pjsip, and the processor was an ARMv5TE with 266 MHz > (TurboSlug), see http://www.devbase.at/voip/yeaphone.php#performance. > I did not perform any in-depth research though... > Regards, > -Thomas > > > ----- Urspr?ngliche Mail ---- > Von: Olle Frimanson <olle.frimanson at keystream.se> > An: pjsip at pjsip.org > Gesendet: Dienstag, den 4. Dezember 2007, 10:26:33 Uhr > Betreff: [pjsip] Performance problems with Speex on ARM9E > > Hi, we are implementing a PJSIP application on a 200 MHz ARM9E > processor (Atmel 9263) and are experiencing some quality problems with > Speex. > > > > With simple codec?s like PCM and GSM everything works great with good > audio quality, but with Speex we get a lot of stutter and noise. > > > > We have turned of VAD, resampling, echo canceller and use ARM5TEJ > optimisations and Speex fixed point but still we get poor audio > quality. > > > > CPU load is around 50% so we don?t expect this to be an issue. > > > > Have anybody experienced similar problems and would an 200 MHz ARM9E > be sufficient? > > > > BR/Olle > > > > > > > > > > > ______________________________________________________________________ > Ihre erste Baustelle? Wissenswertes f?r Bastler und Hobby Handwerker. > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip at lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org
