<html>
<head>
<style>
P
{
margin:0px;
padding:0px
}
body
{
FONT-SIZE: 10pt;
FONT-FAMILY:Tahoma
}
</style>
</head>
<body>I've pretty much implemented my 3G gateway using Asterisk.<BR>
I can currently handle H223 annexe A and B with Golay, AL1 and <FONT>AL2 with 16bit CRC, </FONT>H245 , AMR-NB in if2 format, + H263 qcif.<BR>
I need to do some fixing to make it clear.<BR>
I could eventually transcode the AMR-NB using ffmpeg but that wouldn't let it be LGPL anymore and wouldnt be able to implement it insize chan_zap.c but if I don't decode the AMR, then the SIP phone behind has to be capable of handling AMR-NB...<BR>
If someone wants some info, you are welcome!<BR>
<BR><BR><BR><BR><BR> <BR>
<HR id=stopSpelling>
<BR>
> Subject: RE: [Asterisk-video] Asterisk and video contents for 3G network<BR>> Date: Thu, 24 Aug 2006 12:03:56 +0200<BR>> From: proudel@nortel.com<BR>> To: proudel@nortel.com; asterisk-video@lists.digium.com<BR>> CC: <BR>> <BR>> The video codecs optimized for 3G are 3GP or 3GP2<BR>> <BR>> -----Original Message-----<BR>> From: ROUDEL, PHILIPPE (CTF:8R50) <BR>> Sent: jeudi 24 août 2006 12:02<BR>> To: 'Development discussion of video media support in Asterisk'<BR>> Subject: RE: [Asterisk-video] Asterisk and video contents for 3G network<BR>> <BR>> 3G video do not use H... (H263 or H245) protocols only AMR video conversion (transcoding) is required.<BR>> <BR>> -----Original Message-----<BR>> From: asterisk-video-bounces@lists.digium.com [mailto:asterisk-video-bounces@lists.digium.com] On Behalf Of Sergio García Murillo<BR>> Sent: lundi 24 juillet 2006 12:23<BR>> To: Development discussion of video media support in Asterisk<BR>> Subject: RE: [Asterisk-video] Asterisk and video contents for 3G network<BR>> <BR>> tech@i6net.com wrote:<BR>> > Have any one test an Asterisk throw a 3G gateway (constuctor,<BR>> > reference) ? <BR>> I have made some test calls against some 3G video gateways, they are much nicer in the h245 negotiations and don't complaint with slight differences in the order of the messages. <BR>> <BR>> > How to you generate the video contents to pass throw the 3G GW (tool<BR>> > to manage the video files .h263)? <BR>> > The encoding, bitrate and timing seems to be very important to have a<BR>> > good quality on the 3G phone... how control this parameters ? <BR>> <BR>> Currently we don't have transcoding capabilities in asterisk for video (and I don't think we will have it in the near future) the h263 should be optimized in the source for 3G. GSM Amr need also to be supported, at least be able to pass trough (I have seen many phones supporting g723 but I think you can't grant that all terminals support it).<BR>> <BR>> Greetings<BR>> Sergio<BR>> <BR>> > <BR>> > <BR>> > i6net<BR>> > <BR>> > <BR>> > Selon Sergio García Murillo <Sergio.Garcia@ydilo.com>:<BR>> > <BR>> >> <BR>> >> H223 Annex B without double headres (H324M level 2).<BR>> >> If you are looking at the UCLA/Samsung h223 simulator i understand<BR>> >> that you think it's not easy, but i have still not found any device<BR>> >> (phone or gateway), that implements annex C.<BR>> >> I use zaptel and a libpri, it would need some modification in order<BR>> >> to <BR>> >> be configurable, but hardcoding the q931 setup info is quite easy.<BR>> >> <BR>> >> ________________________________<BR>> >> <BR>> >> From: asterisk-video-bounces@lists.digium.com<BR>> >> [mailto:asterisk-video-bounces@lists.digium.com] On Behalf Of Ramtin<BR>> >> Amin<BR>> >> Sent: lunes, 24 de julio de 2006 8:26<BR>> >> To: Development discussion of video media support in Asterisk<BR>> >> Subject: RE: [Asterisk-video] H324M 3G ISDN<BR>> >> <BR>> >> <BR>> >> Well I'm working on ir currently<BR>> >> So if we want to do it, since it doesn't look that easy, we better<BR>> >> share our knowledge about it.<BR>> >> Sergio: In H223, which annexe is used ?<BR>> >> I've found some interesting stuff capable of handling the H223+245<BR>> >> but <BR>> >> I wanted to understand it more and when you look at the ITU, and it<BR>> >> gets into the Golay(24,12) and BCH code, it starts to become more<BR>> >> complicated :) Tell us more about your expiriance: you modified the<BR>> >> libpri for answering correctly the q.931 ? You use /don't use zaptel<BR>> >> ? How do you capture raw data ? cat /dev/zap/12 ? or with an<BR>> >> app_zapgrab ? <BR>> >> DO you use BRI or PRI ?<BR>> >> <BR>> >> <BR>> >> <BR>> >> <BR>> >> <BR>> >> <BR>> >> <BR>> >> <BR>> >> <BR>> >> ________________________________<BR>> >> <BR>> >> Subject: RE: [Asterisk-video] H324M 3G ISDN<BR>> >> Date: Mon, 24 Jul 2006 08:15:06 +0200<BR>> >> From: Sergio.Garcia@ydilo.com<BR>> >> To: asterisk-video@lists.digium.com<BR>> >> <BR>> >> <BR>> >> Hi everyone,<BR>> >> <BR>> >> It's good to see that i'm not the only one developping int this<BR>> >> subject. I have been working on an h234M library, i have finished<BR>> >> AL1 and AL2 <BR>> >> of h223 (level 2 profile), and almost finished the h245 negotiators.<BR>> >> I <BR>> >> have been able to establish a videocall between an asterisk box and a<BR>> >> motorola phone, but i'm having problems with the negotiations on<BR>> >> other phones. Are any one of you going to start an open source<BR>> >> proyect? <BR>> >> <BR>> >> Greetings<BR>> >> Sergio<BR>> >> <BR>> >> <BR>> >> <BR>> >> ________________________________<BR>> >> <BR>> >> Be one of the first to try Windows Live Mail.<BR>> >> <BR>> > <http://ideas.live.com/programpage.aspx?versionId=5d21c51a-b161-4314-9b0e-4911fb2b2e6d><BR>> >> <BR>> >> <BR>> > --------------------------------------------------------------------------------------<BR>> >> This message and any files transmitted with it are confidential and<BR>> >> intended solely for the use of the individual or entity to whom they<BR>> >> are addressed. No confidentiality or privilege is waived or lost by<BR>> >> any wrong transmission.<BR>> >> If you have received this message in error, please immediately<BR>> >> destroy <BR>> >> it and kindly notify the sender by reply email.<BR>> >> You must not, directly or indirectly, use, disclose, distribute,<BR>> >> print, or copy any part of this message if you are not the intended<BR>> >> recipient. Opinions, conclusions and other information in this<BR>> >> message <BR>> >> that do not relate to the official business of Ydilo Advanced Voice<BR>> >> Solutions, S.A. shall be understood as neither given nor endorsed by<BR>> >> it.<BR>> >> <BR>> > --------------------------------------------------------------------------------------<BR>> >> <BR>> > <BR>> > <BR>> > _______________________________________________<BR>> > --Bandwidth and Colocation provided by Easynews.com --<BR>> > <BR>> > asterisk-video mailing list<BR>> > To UNSUBSCRIBE or update options visit:<BR>> > http://lists.digium.com/mailman/listinfo/asterisk-video<BR>> <BR>> --------------------------------------------------------------------------------------<BR>> This message and any files transmitted with it are confidential and intended solely <BR>> for the use of the individual or entity to whom they are addressed. No confidentiality <BR>> or privilege is waived or lost by any wrong transmission. <BR>> If you have received this message in error, please immediately destroy it and kindly <BR>> notify the sender by reply email.<BR>> You must not, directly or indirectly, use, disclose, distribute, print, or copy any <BR>> part of this message if you are not the intended recipient. Opinions, conclusions and <BR>> other information in this message that do not relate to the official business of <BR>> Ydilo Advanced Voice Solutions, S.A. shall be understood as neither given nor endorsed by it. <BR>> --------------------------------------------------------------------------------------<BR>> _______________________________________________<BR>> --Bandwidth and Colocation provided by Easynews.com --<BR>> <BR>> asterisk-video mailing list<BR>> To UNSUBSCRIBE or update options visit:<BR>> http://lists.digium.com/mailman/listinfo/asterisk-video<BR>> _______________________________________________<BR>> --Bandwidth and Colocation provided by Easynews.com --<BR>> <BR>> asterisk-video mailing list<BR>> To UNSUBSCRIBE or update options visit:<BR>> http://lists.digium.com/mailman/listinfo/asterisk-video<BR><BR><br /><hr />Exprimez-vous en direct avec Windows Live Messenger ! <a href='http://imagine-msn.com/messenger/launch80/default.aspx?locale=fr-fr&source=joinmsncom/messenger' target='_new'>Windows Live Messenger !</a></body>
</html>