Re: [rtcweb] Friday Agenda: Re: Friday Call details for signaling discussion
Harald Alvestrand <harald@alvestrand.no> Thu, 20 October 2011 14:44 UTC
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Date: Thu, 20 Oct 2011 16:44:42 +0200
From: Harald Alvestrand <harald@alvestrand.no>
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To: Iñaki Baz Castillo <ibc@aliax.net>
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Cc: rtcweb@ietf.org
Subject: Re: [rtcweb] Friday Agenda: Re: Friday Call details for signaling discussion
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On 10/20/11 15:31, Iñaki Baz Castillo wrote: > 2011/10/20 Harald Alvestrand<harald@alvestrand.no>: >> In his category of "info signalling", I would quibble a bit in that I see >> "channel-related signalling" (a term I just invented, describing which media >> is sent on which SSRC on which port) as distinct from "identity-related >> signalling", where the whole question of "who am I talking to" is relevant. >> >> I believe "channel-related signalling" needs to be treated together with >> "media signalling". > Hi Harald, after re-reading this mail from you I've realized that I > don't fully understand it. > > For example, a SIP INVITE has: > > 1) Request URI and headers, which contain the identity information, > the destination of the request, and so. This is what I called > "JS-Server Information Signaling". > > 2) An SDP, which contains media description. This is what I've called > "JS-Server Media Signaling". > > Of course both are carried together (the "JS-Server Information > Signaling" carries the "JS-Server Media Signaling"). > > Initially I understood that your "channel-related signalling" is the > same concept as my "JS-Server Information Signaling" (bullet 1), but > then you said: > >> "channel-related signalling" (a term I just invented, describing which media >> is sent on which SSRC on which port) as distinct from "identity-related >> signalling", where the whole question of "who am I talking to" is relevant. > What do you mean with "channel-related signalling"? "which media is sent on which SSRC on which port". This is usually sent as part of SDP, but some of Neil Stratford's messages have indicated a desire to separate the codec negotiation from the channel negotiation, so I thought it was worth pointing out that I think they both need to be considered in the group that you called "media signaling". Hope this helps! Harald
- Re: [rtcweb] Friday Call details for signaling di… Harald Alvestrand
- [rtcweb] Friday Call details for signaling discus… Ted Hardie
- [rtcweb] Friday Agenda: Re: Friday Call details f… Magnus Westerlund
- Re: [rtcweb] Friday Agenda: Re: Friday Call detai… Iñaki Baz Castillo
- Re: [rtcweb] Friday Agenda: Re: Friday Call detai… Harald Alvestrand
- Re: [rtcweb] Friday Agenda: Re: Friday Call detai… Iñaki Baz Castillo
- Re: [rtcweb] Friday Agenda: Re: Friday Call detai… Iñaki Baz Castillo
- Re: [rtcweb] Friday Agenda: Re: Friday Call detai… Harald Alvestrand
- Re: [rtcweb] Friday Agenda: Re: Friday Call detai… Magnus Westerlund
- Re: [rtcweb] Friday Agenda: Re: Friday Call detai… Magnus Westerlund
- Re: [rtcweb] Friday Agenda: Re: Friday Call detai… Wolfgang Beck
- Re: [rtcweb] Friday Agenda: Re: Friday Call detai… Matthew Kaufman
- Re: [rtcweb] Friday Agenda: Re: Friday Call detai… Bernard Aboba
- Re: [rtcweb] Friday Agenda: Re: Friday Call detai… Harald Alvestrand
- Re: [rtcweb] Friday Agenda: Re: Friday Call detai… Hadriel Kaplan
- Re: [rtcweb] Friday Agenda: Re: Friday Call detai… Christer Holmberg