[MMUSIC] SDP Directorate: Review of draft-ietf-xrblock-rtcp-xr-loss-conceal-05

"Ali C. Begen (abegen)" <abegen@cisco.com> Mon, 03 June 2013 10:59 UTC

Return-Path: <abegen@cisco.com>
X-Original-To: mmusic@ietfa.amsl.com
Delivered-To: mmusic@ietfa.amsl.com
Received: from localhost (localhost []) by ietfa.amsl.com (Postfix) with ESMTP id 8195321F9455 for <mmusic@ietfa.amsl.com>; Mon, 3 Jun 2013 03:59:25 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -10.599
X-Spam-Status: No, score=-10.599 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, RCVD_IN_DNSWL_HI=-8]
Received: from mail.ietf.org ([]) by localhost (ietfa.amsl.com []) (amavisd-new, port 10024) with ESMTP id HYaDnNFXdGfa for <mmusic@ietfa.amsl.com>; Mon, 3 Jun 2013 03:59:18 -0700 (PDT)
Received: from rcdn-iport-4.cisco.com (rcdn-iport-4.cisco.com []) by ietfa.amsl.com (Postfix) with ESMTP id 0409621F93BA for <mmusic@ietf.org>; Mon, 3 Jun 2013 03:59:16 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=1249; q=dns/txt; s=iport; t=1370257157; x=1371466757; h=from:to:cc:subject:date:message-id:content-id: content-transfer-encoding:mime-version; bh=myWBsqCEYmKMsQ7itZornkwpE/RsVng13bubOP7S72s=; b=ku1Vlxvpce3+la4UvvtJCkuDwSMjpJTf5tSRCs988KpjSEVD71sC0mBH I2d7KZmwZf8JjttG3fvVqjuxkY971opJfx8jx83CxgvFG9vaJ/UQOaC5s 033Gjt3U/7gWkDM3qf3UlsWN5EMUEaRp8lQZG/Sga7R8uMpU7dCuAChbo Y=;
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-AV: E=Sophos;i="4.87,792,1363132800"; d="scan'208";a="218090379"
Received: from rcdn-core2-6.cisco.com ([]) by rcdn-iport-4.cisco.com with ESMTP; 03 Jun 2013 10:58:59 +0000
Received: from xhc-rcd-x02.cisco.com (xhc-rcd-x02.cisco.com []) by rcdn-core2-6.cisco.com (8.14.5/8.14.5) with ESMTP id r53AwxmQ003819 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Mon, 3 Jun 2013 10:58:59 GMT
Received: from xmb-aln-x01.cisco.com ([fe80::747b:83e1:9755:d453]) by xhc-rcd-x02.cisco.com ([]) with mapi id 14.02.0318.004; Mon, 3 Jun 2013 05:58:59 -0500
From: "Ali C. Begen (abegen)" <abegen@cisco.com>
To: "draft-ietf-xrblock-rtcp-xr-loss-conceal@tools.ietf.org" <draft-ietf-xrblock-rtcp-xr-loss-conceal@tools.ietf.org>
Thread-Topic: SDP Directorate: Review of draft-ietf-xrblock-rtcp-xr-loss-conceal-05
Thread-Index: AQHOYElZgyXNkt/U/0+WIwSPFpWz0g==
Date: Mon, 03 Jun 2013 10:58:58 +0000
Message-ID: <C15918F2FCDA0243A7C919DA7C4BE9940D1076B4@xmb-aln-x01.cisco.com>
Accept-Language: en-US
Content-Language: en-US
x-originating-ip: []
Content-Type: text/plain; charset="us-ascii"
Content-ID: <56803ABD1204DF4AB58427CE3A1CB8D7@emea.cisco.com>
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
Cc: xrblock-chairs <xrblock-chairs@tools.ietf.org>, mmusic <mmusic@ietf.org>
Subject: [MMUSIC] SDP Directorate: Review of draft-ietf-xrblock-rtcp-xr-loss-conceal-05
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: Mon, 03 Jun 2013 10:59:25 -0000

I am the assigned SDP directorate reviewer for this draft. For background on the SDP directorate, please see the FAQ at

Please wait for direction from your document shepherd or AD before posting a new version of the draft.

- The RTCP XR extension syntax seems to have an issue, see below
- There are a few editorial issues

1) Section 1.4: Can I use these metrics for the audio component of A/V applications? If yes, then section 1.4 sounds overly restrictive.

2) Capitalization of the block/metric names is inconsistent.

3) Section 5.1, first parag.: The document defines two blocks not one.

4) Section 5.1:

Why are using 

   xr-format =/ xr-conceal-block
   xr-format =/ xr-conc-sec-block

instead of

   xr-format =/ xr-conceal-block / xr-conc-sec-block

5) Section 6.1: Where do "NCS" and "NLC" come from? Why not choose more appropriate acronyms? Also use the correct registry name: "RTP Control Protocol Extended Reports (RTCP XR) Block Type Registry"

6) Section 6.2: Please use the correct registry name: "RTP Control Protocol Extended Reports (RTCP XR) Session Description Protocol (SDP) Parameters Registry".