For sure. Guess we will have to wait and sound like a robot for a while. Regards Michael Knill
On 28/11/2012, at 9:02 AM, Lonnie Abelbeck wrote: > Hey Michael, > > That means a lot coming from the CODEC guru ! > > Here is a nice reference: > > https://developer.skype.com/resources/SILKDataSheet.pdf > > If only there was a SILK support backport for Asterisk 1.8 . > > Lonnie > > > On Nov 27, 2012, at 2:56 PM, <mgra...@mstvp.com> <mgra...@mstvp.com> wrote: > >> I'd expect SILK to outperform iLBC at similar bit rates. >> >> Michael Graves >> mgraves mstvp.com >> o(713) 861-4005 >> c(713) 201-1262 >> sip:mjgra...@mstvp.onsip.com >> skype mjgraves >> >>> -------- Original Message -------- >>> Subject: [Astlinux-users] Mobile SIP clients, Bria vs. Groundwire >>> From: Lonnie Abelbeck <li...@lonnie.abelbeck.com> >>> Date: Tue, November 27, 2012 1:25 pm >>> To: AstLinux Users Mailing List <astlinux-users@lists.sourceforge.net> >>> >>> >>> Greetings, >>> >>> I have been testing mobile SIP client access to AstLinux, and the combo of >>> SIP TLS, plus SRTP encryption, using either Bria or Groundwire works well >>> for both incoming and outgoing calls. Possibly others have additional >>> comments... >>> >>> Bria iPhone Edition >>> http://www.counterpath.com/bria-iphone-edition.html >>> >>> Groundwire, Business Caliber SIP for the iPhone >>> http://www.acrobits.cz/11/acrobits-groundwire-for-iphone >>> >>> Either work quite well on my iPod Touch 4th gen. I'm not the first to >>> mention this here on this list, thanks to others, you know who you are. :-) >>> >>> Groundwire has a lot more features than Bria, but I personally find that >>> Bria's voice quality is noticeably better than Groundwire's voice quality, >>> which is still OK. If you require Groundwire's features, go with it, if >>> the simpler Bria suits your needs, go with Bria. Your milage may vary. >>> >>> The key feature of both Bria and Groundwire, using iOS at least, is support >>> of a power efficient background TCP process for handling incoming calls, >>> not requiring the power hungry technique of the whole application running >>> in the background. Groundwire also supports push notifications for >>> incoming calls, but this requires Groundwire to upload your SIP credentials >>> to their server, something I'm not willing to do, particularly when SIP/TLS >>> works so well. >>> >>> CODEC's >>> >>> My standard setting is using G.711 CODEC, over WiFi, either via a public AP >>> or using a Verizon LTE MiFi. This works the best for me, but not the most >>> efficient. >>> >>> I tried using the iLBC CODEC, with mixed results. The common issues with >>> 30 ms iLBC packet length in Asterisk vs 20 ms for G.711 and transcoding. >>> >>> iLBC (30ms packet) to G711 (20ms) ULAW transcoding sounds "robotic" >>> https://issues.asterisk.org/jira/browse/ASTERISK-18094 >>> >>> normally using the iLBC CODEC it sounds 'pretty good', though noticeable >>> artifacts compared to G.711 . Additionally when placing callers on hold, >>> etc. I see (Asterisk 1.8)... >>> -- many of these -- >>> Nov 27 12:09:06 gw-lan local0.warn asterisk[4679]: WARNING[18388]: >>> translate.c:206 in framein: no samples for ilbctolin >>> -- >>> -- and these -- >>> Nov 27 12:09:20 gw-lan local0.warn asterisk[4679]: WARNING[18388]: >>> translate.c:225 in framein: ilbctolin did not update samples 0 >>> Nov 27 12:09:20 gw-lan local0.warn asterisk[4679]: WARNING[18388]: >>> codec_ilbc.c:104 in ilbctolin_framein: Huh? An ilbc frame that isn't a >>> multiple of 50 bytes long from RTP (60)? >>> -- >>> >>> Are there other tricks getting iLBC to transcode between 30 and 20 ms >>> properly ? Possibly later Asterisk versions than 1.8 ? >>> >>> Possibly down the road, when Asterisk 11 is production quality, is the >>> (Skype) SILK CODEC the solution ? >>> >>> Asterisk 10 Codecs and Audio Formats >>> https://wiki.asterisk.org/wiki/display/AST/Asterisk+10+Codecs+and+Audio+Formats >>> >>> Notice the "codec_silk.so" is provided as a binary by Digium for free, I'm >>> not sure we could automatically provide it in the AstLinux image for the >>> same reason Digium doesn't. >>> >>> Does the lower bitrate SILK CODEC provide the best solution vs iLBC ? Bria >>> currently supports both a NB and WB SILK CODEC. >>> >>> Comments? >>> >>> Lonnie >>> >>> >>> ------------------------------------------------------------------------------ >>> Keep yourself connected to Go Parallel: >>> DESIGN Expert tips on starting your parallel project right. >>> http://goparallel.sourceforge.net >>> _______________________________________________ >>> Astlinux-users mailing list >>> Astlinux-users@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/astlinux-users >>> >>> Donations to support AstLinux are graciously accepted via PayPal to >>> pay...@krisk.org. >> >> ------------------------------------------------------------------------------ >> Keep yourself connected to Go Parallel: >> DESIGN Expert tips on starting your parallel project right. >> http://goparallel.sourceforge.net >> _______________________________________________ >> Astlinux-users mailing list >> Astlinux-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/astlinux-users >> >> Donations to support AstLinux are graciously accepted via PayPal to >> pay...@krisk.org. >> >> > > > ------------------------------------------------------------------------------ > Keep yourself connected to Go Parallel: > DESIGN Expert tips on starting your parallel project right. > http://goparallel.sourceforge.net > _______________________________________________ > Astlinux-users mailing list > Astlinux-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/astlinux-users > > Donations to support AstLinux are graciously accepted via PayPal to > pay...@krisk.org. ------------------------------------------------------------------------------ Keep yourself connected to Go Parallel: DESIGN Expert tips on starting your parallel project right. http://goparallel.sourceforge.net _______________________________________________ Astlinux-users mailing list Astlinux-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/astlinux-users Donations to support AstLinux are graciously accepted via PayPal to pay...@krisk.org.
