Subject: Re: [video-codec] I-D Action: draft-ietf-netvc-requirements-03.txt

From: Thomas Daede <[email-masked]>
Date: Fri, 28 Oct 2016 17:40:17 -0700

I've reviewed the changes to this draft since the -02 version and it
looks good. I am happy with the new text in section 3.2.

I'm also updating the testing draft to match the new section 4.1 (and
specify all the quantizer points).

Following is a couple of nits that could be addressed if there is
another WGLC, but I'm fine with the document as-is and think it's ready.

"Thus, for each sequence, 30 RD-points for PSNR and 10 that should be
used for testing as well as the 6 values of bit-rates RD-points for
MS-SSIM should be calculated in the case of YCbCr whereas 60 RD-points
(30 for PSNR and 30 for MS-SSIM) should be calculated in the case of RGB."

Instead of saying 10 points vs 30 points, it might be clearer to just
say one curve vs three curves (one for each channel).

Also, my current testing draft encodes all content as YUV 4:2:0 or 4:4:4
(even in the case of an RGB original source, such as the screencasting
scenario). Native RGB is still supported for lossless mode, but the the
special case text in section 4.1. could probably be omitted.

Thanks,
Thomas

On 09/21/2016 12:16 AM, [email-masked] wrote:
> 
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> This draft is a work item of the Internet Video Codec of the IETF.
> 
>         Title           : <Video Codec Requirements and Evaluation Methodology>
>         Authors         : Alexey Filippov
>                           Andrey Norkin
>                           Jose Roberto Alvarez
> 	Filename        : draft-ietf-netvc-requirements-03.txt
> 	Pages           : 24
> 	Date            : 2016-09-21
> 
> Abstract:
>    This document provides requirements for a video codec designed
>    mainly for use over the Internet. In addition, this document
>    describes an evaluation methodology needed for measuring the
>    compression efficiency to ensure whether the stated requirements are
>    fulfilled or not.
> 
> 
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-netvc-requirements/
> 
> There's also a htmlized version available at:
> https://tools.ietf.org/html/draft-ietf-netvc-requirements-03
> 
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-ietf-netvc-requirements-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/
> 
> _______________________________________________
> video-codec mailing list
> [email-masked]
> https://www.ietf.org/mailman/listinfo/video-codec
>