IETF Logo Mail Archive

Re: [video-codec] Minor comments on draft-fuldseth-netvc-thor-00

Jean-Marc Valin <jmvalin@jmvalin.ca> Fri, 10 July 2015 19:01 UTC

Return-Path: <jmvalin@jmvalin.ca>
X-Original-To: video-codec@ietfa.amsl.com
Delivered-To: video-codec@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4DF511A1ADF for <video-codec@ietfa.amsl.com>; Fri, 10 Jul 2015 12:01:03 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.6
X-Spam-Level:
X-Spam-Status: No, score=-2.6 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7] autolearn=ham
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 E-0X3ftoFr3o for <video-codec@ietfa.amsl.com>; Fri, 10 Jul 2015 12:01:01 -0700 (PDT)
Received: from mail-qk0-f179.google.com (mail-qk0-f179.google.com [209.85.220.179]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 326341B2A84 for <video-codec@ietf.org>; Fri, 10 Jul 2015 12:00:52 -0700 (PDT)
Received: by qkhu186 with SMTP id u186so213229652qkh.0 for <video-codec@ietf.org>; Fri, 10 Jul 2015 12:00:51 -0700 (PDT)
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-type :content-transfer-encoding; bh=dTtTXv37HqevccY/jNb/GQhAU6wOG0EdsFRx2wRHgsQ=; b=dW4dwLthn+YgGI7Ly1iHZHu/XaFbTd+/AsUrdiC/0/Gsk0jqFiv1FJzpfpxjhe0/kZ UAG+jS1rUValObH3tqatm8o/ZEjkc+JuVDBf+XYXq4hmqeOZ4OwtXFGDK3+5YWuKR4D8 iZVBvtq9qwiptbTjCREFxDDmCn4ElWw8Sj8NhUupWbheRiYYaXU4sGzqkDFQgJUvHfPu 10C2uBGZAWvq4LwJUOmcGsL5McgpnXF5EPEy8jOxvFNQEQMhB3Ng2kAO36clLGV1TXMU vUwy72kL5xcihsR4Z0sgPk6raXdiaD2J5N50SLSWQ3MYtccIzoGbl1QK/K4p31ABM+yE fHfw==
X-Gm-Message-State: ALoCoQm7cXW6SzWYFT+jr9irYryJnTnJkfnOar84PMMESn+yMrUAvLBeTwgW/Mm+spNkgK4W9m6p
X-Received: by 10.140.25.208 with SMTP id 74mr34301447qgt.104.1436554851450; Fri, 10 Jul 2015 12:00:51 -0700 (PDT)
Received: from panoramix.jmvalin.ca (modemcable074.170-201-24.mc.videotron.ca. [24.201.170.74]) by smtp.gmail.com with ESMTPSA id 20sm5926834qkz.30.2015.07.10.12.00.50 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 10 Jul 2015 12:00:50 -0700 (PDT)
To: "Mo Zanaty (mzanaty)" <mzanaty@cisco.com>, "Arild Fuldseth (arilfuld)" <arilfuld@cisco.com>, "Timothy B. Terriberry" <tterribe@xiph.org>, "video-codec@ietf.org" <video-codec@ietf.org>
References: <559C3EAA.2060809@xiph.org> <D93780CEB41CE1419C1A7542E3096BC210FED1C8@xmb-aln-x08.cisco.com> <D1C40F34.514DA%mzanaty@cisco.com>
From: Jean-Marc Valin <jmvalin@jmvalin.ca>
Message-ID: <55A01661.309@jmvalin.ca>
Date: Fri, 10 Jul 2015 15:00:49 -0400
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.0.1
MIME-Version: 1.0
In-Reply-To: <D1C40F34.514DA%mzanaty@cisco.com>
Content-Type: text/plain; charset="windows-1252"
Content-Transfer-Encoding: 7bit
Archived-At: <http://mailarchive.ietf.org/arch/msg/video-codec/Dt1EqkEnZOVLZEoVHVIPLVvLU8k>
Subject: Re: [video-codec] Minor comments on draft-fuldseth-netvc-thor-00
X-BeenThere: video-codec@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: Video codec BoF discussion list <video-codec.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/video-codec>, <mailto:video-codec-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/video-codec/>
List-Post: <mailto:video-codec@ietf.org>
List-Help: <mailto:video-codec-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/video-codec>, <mailto:video-codec-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 10 Jul 2015 19:01:03 -0000

I see in section 4 that there are only 8 intra modes including DC,
rather than 9. I didn't understand why "upright" is missing, nor what
"The upright and upleft directions are exactly 45 degrees" means in that
context. Can you explain?

Cheers,

	Jean-Marc


On 07/09/2015 12:11 PM, Mo Zanaty (mzanaty) wrote:
> Another correction in section 9.2.6:
> Table 3, Index=2 should show abs(coeff)=4 and level=4.
> Figure 10, the last 0 should be removed.
> All corrections will be updated in a new draft version once submission
> reopens.
> 
> Mo
> 
> On 7/8/15, 4:36 PM, video-codec on behalf of Arild Fuldseth (arilfuld)
> <video-codec-bounces@ietf.org on behalf of arilfuld@cisco.com> wrote:
> 
> Tim,
> 
> Yes, you are right on all points.
> 
> Thank you for pointing that out.
> 
> Regards,
> 
> Arild
> 
> -----Original Message-----
> From: video-codec [mailto:video-codec-bounces@ietf.org] On Behalf Of
> Timothy B. Terriberry
> Sent: 7. juli 2015 23:04
> To: video-codec@ietf.org
> Subject: [video-codec] Minor comments on draft-fuldseth-netvc-thor-00
> 
> In section 8.1.1, step 4, the calculations of c' and d' are supposed to
> use subtractions instead of additions, right?
> 
> A similar question applies to the calculation of c' in 8.2.1 step 3.
> 
> In Table 3 in Section 9.2.6, index 9 should code (run=2,level>1), right?
> 
> _______________________________________________
> video-codec mailing list
> video-codec@ietf.org
> https://www.ietf.org/mailman/listinfo/video-codec
> 
> _______________________________________________
> video-codec mailing list
> video-codec@ietf.org
> https://www.ietf.org/mailman/listinfo/video-codec
> 
> _______________________________________________
> video-codec mailing list
> video-codec@ietf.org
> https://www.ietf.org/mailman/listinfo/video-codec
>

v2.23.0 | Report a Bug | By Email