Hi, since I reported the initial ticket I think a comment could be in place, we discovered that the old behaviour wasn't inline with a codec from VoiceAge. We doubled checked with them and our common conclution (VA, ourselef and Benny and Nanang) was that there was some mismatching in PJMedia and thus PJSIP made the change. It's not completely clear how this should be implemented but we have tested against a lot of different phones and I would say that G.722 in PJMedia is right as it is now, so perhaps the other phone handles this incorrectly. BR/Olle -----Original Message----- From: pjsip-bounces@xxxxxxxxxxxxxxx [mailto:pjsip-bounces at lists.pjsip.org] On Behalf Of Nanang Izzuddin Sent: den 3 april 2009 16:45 To: pjsip list Subject: Re: G.722 codec distortion Hi, To change this, it can only be done by reverting back ticket 658 modification, i.e: changeset 2342 (http://trac.pjsip.org/repos/changeset/2342). I'm not really sure which behaviour is appropriate, however it seems that the ITU recommendation says that the input should be 14-bit. Any feedback/clarification would be great. Regards, nanang On Fri, Apr 3, 2009 at 9:05 PM, Alexei Kuznetsov <eofster at gmail.com> wrote: > So, can I (or should I) do something from my side to change this? Or > is that inappropriate behaviour from the other side? > > Alexei > > On Fri, Apr 3, 2009 at 5:28 PM, Nanang Izzuddin <nanang at pjsip.org> wrote: >> Hi, >> >> The distortion is about signal saturation, since pjmedia G.722 decoder >> amplifies the output (while the encoder deamplify it). It seems that >> "wbdemo at conf.zipdx.com" & other SIP phones G.722 behave differently, >> they don't do amplifying (in decoder) and deamplifying (in encoder) >> the original signal, as pjmedia G.722 did (please see >> http://trac.pjsip.org/repos/ticket/658). >> >> Regards, >> nanang >> >> >> On Fri, Apr 3, 2009 at 5:30 AM, Alexei Kuznetsov <eofster at gmail.com> wrote: >>> Hi, >>> >>> If you call SIP URI wbdemo at conf.zipdx.com and listen for some time, >>> you'll hear audio distortions. Send DTMF 5 and # to change audio feeds >>> and wideband/narrowband. It looks like this service uses G.722 codec. >>> Other SIP softphones and hardware phones seem to be okay. What do you >>> think about it? >>> >>> pjproject-1.0.2, Mac OS X 10.5.6. >>> >>> Alexei > > _______________________________________________ > 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 > _______________________________________________ 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
