Hello, Could someone confirm if VAD/DTX (Annex B) is supported when accessing the G.729 codec through APS/VAS direct on Nokia S60 version 3 ? Thanks in advance. Regards, Vikram.

Hi, Yes, it is supported, please check doxygen doc in pjmedia/include/pjmedia-codec/passthrough.h for more info (the online doc hasn't been updated yet). BR, nanang On Fri, Sep 3, 2010 at 8:43 AM, Vikram Ragukumar <vragukumar@signalogic.com> wrote: > Hello, > > Could someone confirm if VAD/DTX (Annex B) is supported when accessing the > G.729 codec through APS/VAS direct on Nokia S60 version 3 ? > > Thanks in advance. > > Regards, > Vikram. > > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip@lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org >

Nanang, > Yes, it is supported, please check doxygen doc in > pjmedia/include/pjmedia-codec/passthrough.h for more info (the online > doc hasn't been updated yet). Thank you for your response. Support for G.729B when accessed through APS/VAS Direct assumes that the firmware running on the phone includes this codec... correct ? So, is it possible that there are Nokia phones running a version of firmware that does not include G729.B? Are there any messages generated in pjsip's log under such a circumstance ? Where can I find a list of firmware level Nokia E-series supported features? With some searching on google i found - Several posts on Nokia's forum where people are complaining about VAD not working when using APS/VAS - Nokia's datasheets do not indicate explicitly that G729B is supported when using APS/VAS Does PJSIP/PJMEDIA implement a VAD/DTX scheme in front of the G729 codec ? Thanks and Regards, Vikram.

Hi Vikram, Just recalled that we also have problems with APS/VAS G729, e.g: ticket #735 (http://trac.pjsip.org/repos/ticket/735). So the APS/VAS G729 behaviour will be: - G.729 encoder always disables VAD, so no SID/DTX frames will be generated. - G.729 decoder will be able to handle SID/DTX frames (when VAD is enabled). Also see inline comments. On Sat, Sep 4, 2010 at 2:40 AM, Vikram Ragukumar <vragukumar@signalogic.com> wrote: > Nanang, > >> Yes, it is supported, please check doxygen doc in >> pjmedia/include/pjmedia-codec/passthrough.h for more info (the online >> doc hasn't been updated yet). > > Thank you for your response. > > Support for G.729B when accessed through APS/VAS Direct assumes that the > firmware running on the phone includes this codec... correct ? APS/VAS can enumerate supported codecs in runtime, and yes, annex B is always assumed to be there when G729 is supported. > > So, is it possible that there are Nokia phones running a version of firmware > that does not include G729.B? Are there any messages generated in pjsip's > log under such a circumstance ? Don't know. Will be no explicit log message. > > Where can I find a list of firmware level Nokia E-series supported features? Don't know. > > With some searching on google i found > > - Several posts on Nokia's forum where people are complaining about VAD not > working when using APS/VAS As mentioned before, we experienced it too (in encoding side). > > - Nokia's datasheets do not indicate explicitly that G729B is supported when > using APS/VAS I think I read it somewhere, couldn't remember. > > Does PJSIP/PJMEDIA implement a VAD/DTX scheme in front of the G729 codec ? Not for APS/VAS direct. BR, nanang > > Thanks and Regards, > Vikram. >

Nanang, > Just recalled that we also have problems with APS/VAS G729, e.g: > ticket #735 (http://trac.pjsip.org/repos/ticket/735). So the APS/VAS > G729 behaviour will be: > - G.729 encoder always disables VAD, so no SID/DTX frames will be generated. > - G.729 decoder will be able to handle SID/DTX frames (when VAD is enabled). Thank you for those clarifications. Regards, Vikram.