Re: [MMUSIC] Channel descriptions

"Charles Eckel (eckelcu)" <eckelcu@cisco.com> Wed, 18 July 2012 15:57 UTC

Return-Path: <eckelcu@cisco.com>
X-Original-To: mmusic@ietfa.amsl.com
Delivered-To: mmusic@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C6BCE11E808F for <mmusic@ietfa.amsl.com>; Wed, 18 Jul 2012 08:57:53 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -10.517
X-Spam-Level:
X-Spam-Status: No, score=-10.517 tagged_above=-999 required=5 tests=[AWL=0.082, BAYES_00=-2.599, RCVD_IN_DNSWL_HI=-8]
Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ztAcSwCKcsct for <mmusic@ietfa.amsl.com>; Wed, 18 Jul 2012 08:57:52 -0700 (PDT)
Received: from rcdn-iport-8.cisco.com (rcdn-iport-8.cisco.com [173.37.86.79]) by ietfa.amsl.com (Postfix) with ESMTP id A507F21F8738 for <mmusic@ietf.org>; Wed, 18 Jul 2012 08:57:52 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=eckelcu@cisco.com; l=1213; q=dns/txt; s=iport; t=1342627123; x=1343836723; h=from:to:subject:date:message-id:references:in-reply-to: content-transfer-encoding:mime-version; bh=9k7DdEEOT/6xH32GAVGEoR5oEtInxAPn6EVCkaWKPqg=; b=EF2cpJvr9nhPAPxTRdjo91fTaos2OyK8VfZJ0CQUeBQE902CgOJkJMK2 ur5mP+YDsGNeSD4j3iZFEXqNzGYLVdFoqBJGbh5UBMsH7tMAfBnCr+Nqm A6neiCTS026tOyPqYdkZ0lxI5pskjcIcHKhmUdf/UWgizwTivUO5o14/x o=;
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-Anti-Spam-Result: Av8EABncBlCtJXHA/2dsb2JhbABCA7kzgQeCIAEBAQQSAScPPAQCAQgHCgQBAQsUCQcyFAkIAgQBEggah2oBngegIYtAgy6CQWADo2eBZoJf
X-IronPort-AV: E=Sophos;i="4.77,610,1336348800"; d="scan'208";a="103087231"
Received: from rcdn-core2-5.cisco.com ([173.37.113.192]) by rcdn-iport-8.cisco.com with ESMTP; 18 Jul 2012 15:58:42 +0000
Received: from xhc-aln-x08.cisco.com (xhc-aln-x08.cisco.com [173.36.12.82]) by rcdn-core2-5.cisco.com (8.14.5/8.14.5) with ESMTP id q6IFwgPh021963 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Wed, 18 Jul 2012 15:58:42 GMT
Received: from xmb-aln-x08.cisco.com ([169.254.3.205]) by xhc-aln-x08.cisco.com ([173.36.12.82]) with mapi id 14.02.0298.004; Wed, 18 Jul 2012 10:58:42 -0500
From: "Charles Eckel (eckelcu)" <eckelcu@cisco.com>
To: Kevin Gross <kevin.gross@avanw.com>, mmusic <mmusic@ietf.org>
Thread-Topic: [MMUSIC] Channel descriptions
Thread-Index: AQHNZHfyc1XdTdXTo0CfyBNZ0pB4ZJcvMZ+g
Date: Wed, 18 Jul 2012 15:58:42 +0000
Message-ID: <92B7E61ADAC1BB4F941F943788C0882803F488@xmb-aln-x08.cisco.com>
References: <CALw1_Q3GRbgOBB=-rHD1MCu1ii8HQUfi4V+qRe2RmwceOfW4Ug@mail.gmail.com>
In-Reply-To: <CALw1_Q3GRbgOBB=-rHD1MCu1ii8HQUfi4V+qRe2RmwceOfW4Ug@mail.gmail.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-originating-ip: [171.68.122.35]
x-tm-as-product-ver: SMEX-10.2.0.1135-7.000.1014-19048.005
x-tm-as-result: No--42.279700-8.000000-31
x-tm-as-user-approved-sender: No
x-tm-as-user-blocked-sender: No
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
Subject: Re: [MMUSIC] Channel descriptions
X-BeenThere: mmusic@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: Multiparty Multimedia Session Control Working Group <mmusic.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/mmusic>, <mailto:mmusic-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/mmusic>
List-Post: <mailto:mmusic@ietf.org>
List-Help: <mailto:mmusic-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/mmusic>, <mailto:mmusic-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 18 Jul 2012 15:57:53 -0000

Hi Kevin,

Just to clarify my understanding of what you are asking, you can already have an i-line at the session level and/or at the media level (i.e. per m-line). Are you looking for something that lets you differentiate between multiple channels within a single m-line?

Cheers,
Charles  

> -----Original Message-----
> From: mmusic-bounces@ietf.org [mailto:mmusic-bounces@ietf.org] On
> Behalf Of Kevin Gross
> Sent: Tuesday, July 17, 2012 4:58 PM
> To: mmusic
> Subject: [MMUSIC] Channel descriptions
> 
> The i= attribute provides a means to describe a session. Sessions often have
> multiple media streams or channels. Although RFC 3551 (page 8) suggests a
> convention for ordering of channels for surround sound applications, other
> applications use multiple channels in different ways. It would be useful if
> there were a mechanism analogous to i= for describing individual channels
> in a session. Does such a thing exist anywhere? I've searched the archives
> here and didn't find anything.
> 
> Kevin Gross
> 
> +1-303-447-0517
> Media Network Consultant
> 
> AVA Networks - www.AVAnw.com <http://www.avanw.com/> ,
> www.X192.org