2009/3/17 George Evi <george.evi at ctcinc.ca> > Hi, > > > > I created an application based on pjlib on Symbian OS and have some > problems with the sound. > > The SIP session is OK but during the media session the sound is interrupted > at the caller side and the destination has an echo (during of all > conversation) and the sound is interrupted also. > > By "interupted", did you mean like stuttering? Does it happen often? If it is stutter, it could be caused by network jitter, or some activity in the application (we found that even simple activity such as printing log message to console screen could delay the audio). Regarding the echo, I realize that the echo suppressor in pjmedia is still work in progress, so "a bit" of echo is quite expected. I did the tests with Nokia E71 on 3G network. > > Do we need a 3G network? > > I would say Wi-Fi would work better. > What are the minimum requirements (Phone hardware: processor, memory and > others) to have a good quality of sound? > > > Minimum requirement is an S60 3rd ed device. For best quality, use APS-Direct ([1], to be included in release 1.1). It uses native/handset's codec and echo canceller, and in my personal test there is zero echo with this. Though the drawback is it needs Symbian signing. cheers Benny [1] http://trac.pjsip.org/repos/wiki/Nokia_APS_VAS_Direct > Thanks, > > George. > > > > > > > > _______________________________________________ > 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 > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20090319/0476aa98/attachment-0001.html>
