Re: [EXTERNAL] [PNG] Meeting minutes - Nov 14th, 2022

Great.  If you can get me the “base chunk”, I can add the rest.

Table 10, 11 can identify the necessary info:
https://www.dropbox.com/s/4l0xt522g21n4ly/T-REC-H.Sup19-202104-I%21%21PDF-E.pdf?dl=0



Best,
Chris

From: Chris Blume (ProgramMax) <programmax@gmail.com>
Date: Monday, November 14, 2022 at 2:06 PM
To: Seeger, Chris (NBCUniversal) <Chris.Seeger@nbcuni.com>
Cc: public-png@w3.org <public-png@w3.org>
Subject: Re: [EXTERNAL] [PNG] Meeting minutes - Nov 14th, 2022
The 3rd Edition of the PNG spec is already in the waiting period for its patent exemption period, so I think we can add this metadata without pushing back the shipping date. We would otherwise be mostly sitting idle. So we might as well add it during this down time.

I think you mentioned NBCUniversal might want this metadata for SDR in addition to HDR?

I'll read through CTA-861-G. I haven't yet.
ST 2086 and CEA-861 (not CTA) seemed to use different units. Maybe CTA normalizes them? I'll check.

On Mon, Nov 14, 2022 at 1:21 PM Seeger, Chris (NBCUniversal) <Chris.Seeger@nbcuni.com<mailto:Chris.Seeger@nbcuni.com>> wrote:
Hi Everyone,

NBCUniversal would like to see ST.2086, MaxCLL, MaxFALL.  I would recommend this be an amendment on not a requirement for the current draft as CICP is the most important signaling needed ASAP and we would prefer this not be delayed.

The Executive Summary may need a little clarification as ST 2086, MaxCLL, MaxFall are all part of CTA-861-G (I think this is correct 😊)



___________________________________

Chris Seeger
Director, Advanced Content Creation Technology
Office of the CTO
NBC Universal, LLC





From: Chris Blume (ProgramMax) <programmax@gmail.com<mailto:programmax@gmail.com>>
Date: Monday, November 14, 2022 at 1:01 PM
To: public-png@w3.org<mailto:public-png@w3.org> <public-png@w3.org<mailto:public-png@w3.org>>
Subject: [EXTERNAL] [PNG] Meeting minutes - Nov 14th, 2022
Attached is a PDF of the meeting minutes from Nov 14th, 2022.

Executive summary:

  *   Two new chunks will be added for ST.2086 and CTA-861-G HDR metadata.
  *   These standards use different units (0.00002 nits, 1 nit) represented in different ways from existing PNG chunks. That is okay. Each chunk will use the units and representations of that standard.
The next meeting will be Nov 28th, 2022.
A future email will list topics for that meeting.