- From: Sebastian Wick via GitHub <sysbot+gh@w3.org>
- Date: Fri, 21 Jun 2024 18:03:48 +0000
- To: public-css-archive@w3.org
> Source: https://www.nhk.or.jp/strl/english/publica/bt/70/2.html Funnily it says, and I quote "The video signals of the HLG and PQ formats can be mutually converted. A framework for the conversion is described in Report ITU-R BT.2390." If that's the case, then the PQ signal which got converted to HLG will be re-rendered by the HLG OOTF on the display to adjust for the viewing environment and whatever luminance was encoded in the PQ signal isn't the one which will be displayed. PQ is no different than any other display referred signal. They all describe the absolute luminance on the reference display (i.e. the "absolute" luminance is referring to the reference display). Displays do re-render the images to adjust between the differences between the reference display and reference viewing environment and the actual display and actual viewing environment. Mostly crude methods until now of backlight control, brightness and contrast sliders. -- GitHub Notification of comment by swick Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/10460#issuecomment-2183203950 using your GitHub account -- Sent via github-notify-ml as configured in https://github.com/w3c/github-notify-ml-config
Received on Friday, 21 June 2024 18:03:49 UTC