Re: [AVTCORE] I-D Action: draft-ietf-avtcore-multi-party-rtt-mix-11.txt

[Gunnar Hellström <[e-mail]>]

A new version is available with corrections and clarifications, mainly 
in sections 3.10 - 3.23 about composition of packets interleaved from 
multiple sources.

Den 2020-11-22 kl. 22:57, skrev [e-mail]:
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> This draft is a work item of the Audio/Video Transport Core Maintenance WG of the IETF.
>
>          Title           : RTP-mixer formatting of multi-party Real-time text
>          Author          : Gunnar Hellstrom
> 	Filename        : draft-ietf-avtcore-multi-party-rtt-mix-11.txt
> 	Pages           : 41
> 	Date            : 2020-11-22
>
> Abstract:
>     Real-time text mixers for multi-party sessions need to identify the
>     source of each transmitted group of text so that the text can be
>     presented by endpoints in suitable grouping with other text from the
>     same source, while new text from other sources is also presented in
>     readable grouping as received interleaved in real-time.
>
>     Regional regulatory requirements specify provision of real-time text
>     in multi-party calls.  RFC 4103 mixer implementations can use
>     traditional RTP functions for source identification, but the mixer
>     source switching performance is limited when using the default
>     transmission characteristics with redundancy.
>
>     Enhancements for RFC 4103 real-time text mixing is provided in this
>     document, suitable for a centralized conference model that enables
>     source identification and source switching.  The intended use is for
>     real-time text mixers and multi-party-aware participant endpoints.
>     The specified mechanism build on the standard use of the CSRC list in
>     the RTP packet for source identification.  The method makes use of
>     the same "text/t140" and "text/red" formats as for two-party
>     sessions.
>
>     A capability exchange is specified so that it can be verified that a
>     participant can handle the multi-party coded real-time text stream.
>     The capability is indicated by use of a media attribute "rtt-mixer".
>
>     The document updates RFC 4103[RFC4103]
>
>     A specifications of how a mixer can format text for the case when the
>     endpoint is not multi-party aware is also provided.
>
>
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-avtcore-multi-party-rtt-mix/
>
> There is also an HTML version available at:
> https://www.ietf.org/archive/id/draft-ietf-avtcore-multi-party-rtt-mix-11.html
>
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-ietf-avtcore-multi-party-rtt-mix-11
>
>
> 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/
>
>
> _______________________________________________
> Audio/Video Transport Core Maintenance
> [e-mail]
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-- 
Gunnar Hellström
GHAccess
[e-mail]