Re: [AVTCORE] I-D Action: draft-ietf-avtcore-multi-party-rtt-mix-03.txt

Gunnar Hellström <gunnar.hellstrom@ghaccess.se> Wed, 27 May 2020 19:28 UTC

Return-Path: <gunnar.hellstrom@ghaccess.se>
X-Original-To: avt@ietfa.amsl.com
Delivered-To: avt@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id ED8583A0A34 for <avt@ietfa.amsl.com>; Wed, 27 May 2020 12:28:57 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.899
X-Spam-Level:
X-Spam-Status: No, score=-1.899 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=egensajt.se
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id pBoa9ttThVT8 for <avt@ietfa.amsl.com>; Wed, 27 May 2020 12:28:54 -0700 (PDT)
Received: from smtp.egensajt.se (smtp.egensajt.se [193.42.159.246]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 0C7E23A0A35 for <avtcore@ietf.org>; Wed, 27 May 2020 12:28:52 -0700 (PDT)
Received: from [192.168.2.136] (h79-138-72-251.cust.a3fiber.se [79.138.72.251]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: gunnar.hellstrom@ghaccess.se) by smtp.egensajt.se (Postfix) with ESMTPSA id 80EB82008F for <avtcore@ietf.org>; Wed, 27 May 2020 21:28:50 +0200 (CEST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=egensajt.se; s=dkim; t=1590607730; bh=JEYV0YW37N7b2J2MnjgBuSvgke2Davm8K+HaV/VmMiw=; h=Subject:To:References:From:Date:In-Reply-To:From; b=bk0LdIUQZYpQBf9fSh+t8gG5O4VfTRUXB0bL+/vf1sr/KZzN/nx2cQNAPW4Vh3kWo 7GsfsBnBP+yoSeUhOji8IdE5mtZVZ/Q+3aa48THvMMdRMGY0DoB/esnMQ71WQNGhvQ c8GUKRXc7MI+NyaAOvYTVS12ZmPy7Tjose/UAIVE=
To: "avtcore@ietf.org" <avtcore@ietf.org>
References: <159060682447.20452.11610653988668919408@ietfa.amsl.com>
From: =?UTF-8?Q?Gunnar_Hellstr=c3=b6m?= <gunnar.hellstrom@ghaccess.se>
Message-ID: <dfe2554c-d705-2bcc-49ea-812713ab153b@ghaccess.se>
Date: Wed, 27 May 2020 21:28:50 +0200
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.8.1
MIME-Version: 1.0
In-Reply-To: <159060682447.20452.11610653988668919408@ietfa.amsl.com>
Content-Type: text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding: 8bit
Content-Language: sv
Archived-At: <https://mailarchive.ietf.org/arch/msg/avt/d7XRQMicbeiTjnChTWrYl5niDYQ>
Subject: Re: [AVTCORE] I-D Action: draft-ietf-avtcore-multi-party-rtt-mix-03.txt
X-BeenThere: avt@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Audio/Video Transport Core Maintenance <avt.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/avt>, <mailto:avt-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/avt/>
List-Post: <mailto:avt@ietf.org>
List-Help: <mailto:avt-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/avt>, <mailto:avt-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 27 May 2020 19:28:58 -0000

A new version of draft-ietf-avtcore-multi-party-rtt-mix is available.

A number of clarifications and additions are included. Please see 
changes chapter for details.

One format change: The last data header now has same format as all others.

Modified dynamic transmission interval, shortest interval increased from 
100 to 150 ms as a balance between loss protection and delay.

Brief performance requirements included in terms of number of 
simultaneously transmitting sources with good performance and introduced 
latency.

Regards

Gunnar


Den 2020-05-27 kl. 21:13, 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-03.txt
> 	Pages           : 36
> 	Date            : 2020-05-27
>
> 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 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-03
> https://datatracker.ietf.org/doc/html/draft-ietf-avtcore-multi-party-rtt-mix-03
>
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-ietf-avtcore-multi-party-rtt-mix-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/
>
>
> _______________________________________________
> 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

-- 
Gunnar Hellström
GHAccess
gunnar.hellstrom@ghaccess.se