| ▲ | astrange 2 days ago | |||||||||||||||||||||||||||||||
The screen is literally getting darker so the HDR video will appear to have more contrast. | ||||||||||||||||||||||||||||||||
| ▲ | kllrnohj 2 days ago | parent [-] | |||||||||||||||||||||||||||||||
No, it literally isn't. It's literally doing the opposite, it increases the display brightness in order to show the HDR content. The SDR content is dimmed proportional to the increase such that SDR has the same emitted brightness before & after the change. SDR brightness is not reduced to "add contrast". The blog post doesn't seem to say that anywhere, either, but if it does it's simply wrong. As a general note it seems wrong about a lot of aspects, like saying that Apple does this on non-HDR displays. They don't. It then also conflates EDR with whether or not HDR is used. EDR is simply the representation of content between apps & the compositor. It's a working space not entirely unlike scRGB where 0.0-1.0 is simply the SDR range, and it can go beyond that. But going beyond the maximum reported EDR range, which can be as low as 1.0, the result is simply clipped. So they are not "simulating" HDR on a non-HDR display. | ||||||||||||||||||||||||||||||||
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