We are not happy overall (when using GSM), actually the worst is for remote side which experiences loss of syllabisis, some time stuttering and echo is present. We have good results with default codec PCMU but we wanted to have a more performant codec with lower bit rate. After all tests made I start to think that at least on Nokia E71 because of resource limitation (mostly CPU) we can not use GSM or iLBC external codecs. I test iLBC and did a profiling which shows a 60% CPU load which cause application blocking (not dead, no crash) but don't respond to Hung-up but could use application Exit button. I thing we should try as you suggested "Audio Proxy Server" which use internal codecs and should give better results. Thank you, George. _____ From: pjsip-bounces@xxxxxxxxxxxxxxx [mailto:pjsip-bounces at lists.pjsip.org] On Behalf Of Benny Prijono Sent: Tuesday, May 12, 2009 6:26 PM To: pjsip list Subject: Re: audio problem with GSM on Symbian On Tue, May 12, 2009 at 7:29 PM, George Evi <george.evi at ctcinc.ca> wrote: The problem is the voice when we using the GSM-FR (full rate) codec on Nokia 71 connected on wireless network (case Rogers Canada). The "wav" file is a registration of my voice when I leave a message on my voicemail at home on a PSTN phone. We try to improve the voice quality :-). What I meant to ask was, are you not happy with the overall quality of the recording, or some parts of it (in which case, which one, e.g. from what time/duration), or both. I noticed that initially the recording is quite audible, but some parts of it later are just garbled/blips. cheers Benny -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20090513/ac6da827/attachment.html>
