From nobody Tue May 2 07:49:02 2017 Return-Path: X-Original-To: video-codec@ietfa.amsl.com Delivered-To: video-codec@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 949801316D1 for ; Tue, 2 May 2017 07:49:00 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.502 X-Spam-Level: X-Spam-Status: No, score=-14.502 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, RP_MATCHES_RCVD=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=cisco.com 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 eYazg2HLbm6I for ; Tue, 2 May 2017 07:48:56 -0700 (PDT) Received: from rcdn-iport-1.cisco.com (rcdn-iport-1.cisco.com [173.37.86.72]) (using TLSv1.2 with cipher DHE-RSA-SEED-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 7A3381316DA for ; Tue, 2 May 2017 07:44:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=16911; q=dns/txt; s=iport; t=1493736272; x=1494945872; h=from:to:subject:date:message-id:mime-version; bh=ehDtpxPG9NFF7b39PfO7GkMBefUM5b8HbUyAc+N1VeQ=; b=U2S7NNQW2Gz4f9kJkbkQA8l+WNs6renzT145rKiYYieVQnNvbjgzgR1s cxIV3tH9J3hb/8AygfsplScJpBpvErsdDmROW3vxs1BStznw7rMqzOPQu teiH3zh2BTwVf20CNo4KG9KEk9jo/BM6lCF228EZ9vF/684AuRcP73I6u w=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: =?us-ascii?q?A0AfCgBumghZ/4oNJK1cGgEBAQECAQEBA?= =?us-ascii?q?QgBAQEBgm48K2KBDAeDYYoYkU2GLQaKA4U3gg8ugkCDNgKERD8YAQIBAQEBAQE?= =?us-ascii?q?Bax0LhRUBAQkZAwRhBgEZAwECKAQtCBQJCgQTih4OnxaQAQyCJYsbAQEIAQEBA?= =?us-ascii?q?SSGX4FehjyBExIBIzGCT4JeBZAShkSGfgGHGot2ggJVhGKIaIE9lDABHzh/C28?= =?us-ascii?q?VGiqGcHYBhlqBIYENAQEB?= X-IronPort-AV: E=Sophos;i="5.37,405,1488844800"; d="scan'208,217";a="243924446" Received: from alln-core-5.cisco.com ([173.36.13.138]) by rcdn-iport-1.cisco.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 02 May 2017 14:44:31 +0000 Received: from XCH-RCD-001.cisco.com (xch-rcd-001.cisco.com [173.37.102.11]) by alln-core-5.cisco.com (8.14.5/8.14.5) with ESMTP id v42EiVV7029652 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL) for ; Tue, 2 May 2017 14:44:31 GMT Received: from xch-aln-005.cisco.com (173.36.7.15) by XCH-RCD-001.cisco.com (173.37.102.11) with Microsoft SMTP Server (TLS) id 15.0.1210.3; Tue, 2 May 2017 09:44:30 -0500 Received: from xch-aln-005.cisco.com ([173.36.7.15]) by XCH-ALN-005.cisco.com ([173.36.7.15]) with mapi id 15.00.1210.000; Tue, 2 May 2017 09:44:30 -0500 From: "Mo Zanaty (mzanaty)" To: "video-codec@ietf.org" Thread-Topic: WG Last Call for comments on Requirements draft Thread-Index: AQHSw1KaJlgtDtDbE0WVnixk/TBlKg== Date: Tue, 2 May 2017 14:44:29 +0000 Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/14.7.3.170325 x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.82.228.4] Content-Type: multipart/alternative; boundary="_000_D52E0D726D550mzanatyciscocom_" MIME-Version: 1.0 Archived-At: Subject: [video-codec] WG Last Call for comments on Requirements draft X-BeenThere: video-codec@ietf.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: Video codec BoF discussion list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 02 May 2017 14:49:01 -0000 --_000_D52E0D726D550mzanatyciscocom_ Content-Type: text/plain; charset="windows-1251" Content-Transfer-Encoding: quoted-printable This email announces a NETVC Working Group Last Call (WGLC) for comments on= draft-ietf-netvc-requirements-06. Please review and send comments to the list (or just authors and chairs) by= May 16. A summary of the recent changes is included below. Thanks, Mo -----Original Message----- From: video-codec > on behalf of Filippov Alexey > Date: Friday, April 28, 2017 at 7:24 AM To: "video-codec@ietf.org" >, netvc-chairs > Cc: "Timothy B. Terriberry" >, = Thomas Daede >, Andrey Norkin= >, Jose Alvarez >, Zhoujianto= ng > Subject: [video-codec] Version -06 of the requirements draft Dear colleagues, Today, version -06 of the requirements draft was published. The only change= in the document is in Section 3.1.1. The sentence "3.1.1:The most basic requirement is coding efficiency, i.e. compression pe= rformance on both "easy" and "difficult" natural content as well as screen = sharing content (both static and dynamic)." was replaced by "3.1.1:The most basic requirement is coding efficiency, i.e. compression pe= rformance on both "easy" and "difficult" content for applications and use c= ases in Section 2." It is done to keep the requirements draft consistent with the testing draft= where different content is used for estimating compression performance. In addition, we (the authors of the requirements draft) would like to comme= nt on the changes appeared in version -05 of the document and discussed at = the meeting in Chicago. 3.1.3: Bitstream syntax should allow extensibility and backward compatibili= ty. New features can be supported easily by using metadata (e.g., such as S= EI messages, VUI, headers) without affecting the bitstream compatibility wi= th legacy decoders. A newer version of the decoder shall be able to play bi= tstreams of an older version of the same or lower profile and level. Our comment: In fact, this requirement was contained in the previous versio= ns of the draft (starting from version -02). In particular, SEI messages, V= UI and headers were mentioned there. To clarify this point, it is NOT a req= uirement that a new version of the codec with new coding tools has to suppo= rt the older versions of that codec. It merely states that extending the cu= rrent codec with support of new metadata, such as video source information = etc, should not break compatibility with older bitstreams of the same codec= . That is, the syntax for signaling metadata should be extensible and addin= g new metadata should not break compatibility with older decoders. The deco= ders should just ignore metadata they do not understand. Minor changes in Section 3.2.2. "Coding delay": Support of efficient random= access point encoding (such as intra coding and resetting of context varia= bles) as well as efficient switching between multiple quality representatio= ns. Our comment: This requirement was in the description of the use cases in th= e document (e.g., in section 2.1 "Internet Video Streaming"), now it is als= o explicitly mentioned in the requirements 3.2.3. Complexity: Feasible real-time implementation of both an encoder and= a decoder supporting a chosen subset of tools for hardware and software im= plementation on a wide range of state-of-the-art platforms. The real-time e= ncoder tools subset should provide meaningful improvement in compression ef= ficiency at reasonable complexity of hardware and software encoder implemen= tations as compared to current real-time implementations of state-of-the-ar= t video compression technologies such as HEVC/H.265 and VP9. Our comment: This is just a clarification regarding what a feasible real-ti= me implementation means. Your further questions and comments are welcome! -- Best regards, Alexey Filippov -----Original Message----- From: "internet-drafts@ietf.org" Date: Friday, April 28, 2017 at 6:54 AM Subject: New Version Notification for draft-ietf-netvc-requirements-06.txt A new version of I-D, draft-ietf-netvc-requirements-06.txt has been successfully submitted by Alexey Filippov and posted to the IETF repository. Name: draft-ietf-netvc-requirements Revision: 06 Title: