[AVTCORE] New version - draft-hellstrom-avtcore-multi-party-rtt-source-02.txt
Gunnar Hellström <gunnar.hellstrom@omnitor.se> Thu, 26 March 2020 21:02 UTC
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Subject: [AVTCORE] New version - draft-hellstrom-avtcore-multi-party-rtt-source-02.txt
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A new version of draft-hellstrom-avtcore-multi-party-rtt-source on the topic of multi-party real-time text is available. The main modifications are results of the discussions in the list: 1. The transmission interval is decreased to 100 ms as one action to improve mixer switching performance. 2. A requirement is introduced that if the multi-party capability negotiation fails, then the mixer should mix for a multi-party unaware endpoint. 3. Details and example figures are added to the presentation considerations. 4. A short description of multi-party mixing for multi-party-unaware endpoints is added including example figures 5. A note about deviation of use of the CSRC list between RFC 2198 and the draft specification is introduced. 6. A number of minor editorial enhancements. See below for links. Regards Gunnar --------- Ämne: I-D Action: draft-hellstrom-avtcore-multi-party-rtt-source-02.txt Datum: Thu, 26 Mar 2020 13:36:59 -0700 Från: internet-drafts@ietf.org Svar till: internet-drafts@ietf.org Till: i-d-announce@ietf.org A New Internet-Draft is available from the on-line Internet-Drafts directories. Title : Indicating source of multi-party Real-time text Author : Gunnar Hellstrom Filename : draft-hellstrom-avtcore-multi-party-rtt-source-02.txt Pages : 20 Date : 2020-03-26 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. 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 with redundancy. An enhancement for RFC 4103 real-time text mixing is provided in the present specification, suitable for a centralized conference model that enables source identification and efficient source switching. The intended use is for real-time text mixers and multi-party-aware participant endpoints. The mechanism builds on use of the CSRC list in the RTP packet. 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 an sdp media attribute "rtt-mix". A brief description about 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-hellstrom-avtcore-multi-party-rtt-source/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-hellstrom-avtcore-multi-party-rtt-source-02 https://datatracker.ietf.org/doc/html/draft-hellstrom-avtcore-multi-party-rtt-source-02 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-hellstrom-avtcore-multi-party-rtt-source-02 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/ _______________________________________________ I-D-Announce mailing list I-D-Announce@ietf.org https://www.ietf.org/mailman/listinfo/i-d-announce Internet-Draft directories: http://www.ietf.org/shadow.html or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
- [AVTCORE] New version - draft-hellstrom-avtcore-m… Gunnar Hellström