[AVTCORE] I-D Action: draft-hellstrom-avtcore-multi-party-rtt-solutions-03.txt
Gunnar Hellström <gunnar.hellstrom@ghaccess.se> Sun, 09 August 2020 14:10 UTC
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From: Gunnar Hellström <gunnar.hellstrom@ghaccess.se>
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Subject: [AVTCORE] I-D Action: draft-hellstrom-avtcore-multi-party-rtt-solutions-03.txt
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Thee is a new version of draft-hellstrom-avtcore-multi-party-rtt-solutions available. The main differences are that the performance requirements are more elaborated, and clear recommended solutions provided with preference for rapidly standardised and easily implemented solutions. The topic was presented and briefly discussed in IETF 108. Here is a link to the presentation: https://www.ietf.org/proceedings/108/slides/slides-108-avtcore-multi-party-real-time-text-00 The focus is now proposed to be on the method for mixing for multi-party unaware endpoints based on RTP and on the RTP-mixer based version using RFC 4103 with 100 ms transmission interval when more than one participant is sending text simultaneously. Regards Gunnar ----------------------------------------------------------------------------------------------- A New Internet-Draft is available from the on-line Internet-Drafts directories. Title : Real-time text solutions for multi-party sessions Author : Gunnar Hellstrom Filename : draft-hellstrom-avtcore-multi-party-rtt-solutions-03.txt Pages : 45 Date : 2020-08-08 Abstract: This document specifies methods for Real-Time Text (RTT) media handling in multi-party calls. The main discussed transport is to carry Real-Time text by the RTP protocol in a time-sampled mode according to RFC 4103. The mechanisms enable the receiving application to present the received real-time text media, separated per source, in different ways according to user preferences. Some presentation related features are also described explaining suitable variations of transmission and presentation of text. Call control features are described for the SIP environment. A number of alternative methods for providing the multi-party negotiation, transmission and presentation are discussed and a recommendation for the main ones is provided. The main solution for SIP based centralized multi-party handling of real-time text is achieved through a media control unit coordinating multiple RTP text streams into one RTP stream. Alternative methods using a single RTP stream and source identification inline in the text stream are also described, one of them being provided as a lower functionality fallback method for endpoints with no multi-party awareness for RTT. Bridging methods where the text stream is carried without the contents being dealt with in detail by the bridge are also discussed. Brief information is also provided for multi-party RTT in the WebRTC environment. The intention is to provide background for decisions, specification and implementation of selected methods. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-hellstrom-avtcore-multi-party-rtt-solutions/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-hellstrom-avtcore-multi-party-rtt-solutions-03 https://datatracker.ietf.org/doc/html/draft-hellstrom-avtcore-multi-party-rtt-solutions-03 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-hellstrom-avtcore-multi-party-rtt-solutions-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/
- [AVTCORE] I-D Action: draft-hellstrom-avtcore-mul… Gunnar Hellström