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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 ----- Ursprüngliche Mail ---- Von: Olle Frimanson <olle.frimanson@keystream.se> An: pjsip@pjsip.org Gesendet: Dienstag, den 4. Dezember 2007, 10:26:33 Uhr Betreff: [pjsip] Performance problems with Speex on ARM9E <!-- /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm;margin-bottom:.0001pt;font-size:12.0pt;font-family:"Times New Roman";} a:link, span.MsoHyperlink {color:blue;text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {color:purple;text-decoration:underline;} span.EmailStyle17 {font-family:Arial;color:windowtext;} _filtered {margin:70.85pt 70.85pt 70.85pt 70.85pt;} div.Section1 {} --> 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 Heute schon einen Blick in die Zukunft von E-Mails wagen? Versuchen Sie´s mit dem neuen Yahoo! Mail. www.yahoo.de/mail

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 > > > ----- Ursprüngliche Mail ---- > Von: Olle Frimanson <olle.frimanson@keystream.se> > An: pjsip@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 für Bastler und Hobby Handwerker. > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip@lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org