Re: [AVTCORE] I-D Action: draft-ietf-avtcore-multi-party-rtt-mix-06.txt
Gunnar Hellström <gunnar.hellstrom@ghaccess.se> Thu, 11 June 2020 21:36 UTC
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From: Gunnar Hellström <gunnar.hellstrom@ghaccess.se>
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Date: Thu, 11 Jun 2020 23:36:20 +0200
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Subject: Re: [AVTCORE] I-D Action: draft-ietf-avtcore-multi-party-rtt-mix-06.txt
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A new version -06 of the rtt multi-party mixing draft is available. The sections about media subtype registration and mapping of media subtype parameters to sdp are improved. I have mentioned a question on alternative codings and I would like to have a discussion on these alternatives. 1) replace the PT in the data headers with a sequence number per source for improved handling of loss. 2)Use RFC 5109 general FEC format with RFC 2198 to get a format completely based on existing RFCs. Assuming that we stay with the current format, I have no more issues, and would appreciate comments to progress the draft. /Gunnar Den 2020-06-11 kl. 23:18, skrev internet-drafts@ietf.org: > 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-06.txt > Pages : 40 > Date : 2020-06-11 > > 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 this > document, 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 and an extended packet format "text/rex". > > 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 the media subtype "text/rex". > > The document updates RFC 4102[RFC4102] and RFC 4103[RFC4103] > > 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-ietf-avtcore-multi-party-rtt-mix/ > > There are also htmlized versions available at: > https://tools.ietf.org/html/draft-ietf-avtcore-multi-party-rtt-mix-06 > https://datatracker.ietf.org/doc/html/draft-ietf-avtcore-multi-party-rtt-mix-06 > > A diff from the previous version is available at: > https://www.ietf.org/rfcdiff?url2=draft-ietf-avtcore-multi-party-rtt-mix-06 > > > 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 > avt@ietf.org > https://www.ietf.org/mailman/listinfo/avt -- Gunnar Hellström GHAccess gunnar.hellstrom@ghaccess.se
- [AVTCORE] I-D Action: draft-ietf-avtcore-multi-pa… internet-drafts
- Re: [AVTCORE] I-D Action: draft-ietf-avtcore-mult… Gunnar Hellström