Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-simulcast-03.txt

Bo Burman <bo.burman@ericsson.com> Mon, 19 October 2015 23:48 UTC

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From: Bo Burman <bo.burman@ericsson.com>
To: "mmusic@ietf.org" <mmusic@ietf.org>
Thread-Topic: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-simulcast-03.txt
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Date: Mon, 19 Oct 2015 23:48:21 +0000
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Subject: Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-simulcast-03.txt
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This update addresses comments received at the virtual interim, as well as aligning with the RID draft (draft-pthatcher-mmusic-rid-02), and also aligns use case text with what the solution actually describes.

Summary on edits, from the draft:

   o  Removed text on multicast / broadcast from use cases, since it is
      not supported by the solution.

   o  Removed explicit references to unified plan draft.

   o  Added possibility to initiate simulcast streams in paused mode.

   o  Enabled an offerer to offer multiple stream identification (pt or
      rid) methods and have the answerer choose which to use.

   o  Added a preference indication also in send direction offers.

   o  Added a section on limitations of the current proposal, including
      identification method specific limitations.

> -----Original Message-----
> From: mmusic [mailto:mmusic-bounces@ietf.org] On Behalf Of internet-drafts@ietf.org
> Sent: den 20 oktober 2015 01:36
> To: i-d-announce@ietf.org
> Cc: mmusic@ietf.org
> Subject: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-simulcast-03.txt
> 
> 
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
>  This draft is a work item of the Multiparty Multimedia Session Control Working Group of the IETF.
> 
>         Title           : Using Simulcast in SDP and RTP Sessions
>         Authors         : Bo Burman
>                           Magnus Westerlund
>                           Suhas Nandakumar
>                           Mo Zanaty
> 	Filename        : draft-ietf-mmusic-sdp-simulcast-03.txt
> 	Pages           : 25
> 	Date            : 2015-10-19
> 
> Abstract:
>    In some application scenarios it may be desirable to send multiple
>    differently encoded versions of the same media source in different
>    RTP streams.  This is called simulcast.  This document discusses the
>    best way of accomplishing simulcast in RTP and how to signal it in
>    SDP.  A solution is defined by making an extension to SDP, and using
>    RTP/RTCP identification methods to relate RTP streams belonging to
>    the same media source.  The SDP extension consists of a new media
>    level SDP attribute that expresses capability to send and/or receive
>    simulcast RTP streams.  RTP/RTCP identification using either payload
>    types or a separately defined method for RTP stream configuration are
>    defined.
> 
> 
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-mmusic-sdp-simulcast/
> 
> There's also a htmlized version available at:
> https://tools.ietf.org/html/draft-ietf-mmusic-sdp-simulcast-03
> 
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-ietf-mmusic-sdp-simulcast-03
> 
> 
> Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are
> available at tools.ietf.org.
> 
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
> 
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