Did you tried different codes? Like GSM, G729, AMR, G711? Please consider that the 3G connection and the 'packetizing algorithm' has to be carefully design on Symbian in order not to incurr in overflow and underflow. Did you checked if there's some buffer overflowing or underflowing? Fabio George Evi wrote: > > Hi Benny, > > > > Thanks for your response. > > The flow of sound is disrupted on both sides (caller and callee voice > reception). You can hear the sound but the words are not completed and > on the callee side the voice is metalique (like a robot speech). The > latest tests I made were done with Nokia E61 (S60 3^rd edition -mr) > connected Wi-Fi and I expected to see some improvements but voice > stilled disrupted. > > I?m using iLBC as codec (1^st priority) and UDP transport. > > Do you have any suggestions? > > > > Thank you, > > George. > > > > ------------------------------------------------------------------------ > > *From:* pjsip-bounces at lists.pjsip.org > [mailto:pjsip-bounces at lists.pjsip.org] *On Behalf Of *Benny Prijono > *Sent:* Thursday, March 19, 2009 11:27 AM > *To:* pjsip list > *Subject:* Re: [pjsip] Pjlib on Symbian > > > > 2009/3/17 George Evi <george.evi at ctcinc.ca <mailto: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 <mailto:pjsip at lists.pjsip.org> > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org > > > > ------------------------------------------------------------------------ > > _______________________________________________ > 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/20090319/658f6073/attachment-0001.html>
