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What is HDR, anyway?

(www.lux.camera)
789 points _kush | 1 comments | 14 May 25 12:46 UTC | HN request time: 0.205s | source
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NelsonMinar ◴[14 May 25 15:57 UTC] No.43986063[source]▶
Is there a consensus definition of what counts as "HDR" in a display? What is the "standard dynamic range" of a typical TV or computer monitor? Is it roughly the same for devices of the same age?

My understanding is most SDR TVs and computer screens have displays about 200-300 nits (aka cd/m²). Is that the correct measure of the range of the display? The brightest white is 300 nits brighter than the darkest black?

replies(2): >>43986432 #>>43986557 #
1. adgjlsfhk1 ◴[14 May 25 16:38 UTC] No.43986557[source]▶
this isn't a correct definition. human perception of brightness is roughly logarithmic, so it also matters how deep the blacks get. For a good HDR experience, you need a monitor that gets to 600 nits at a bare minimum, but also which can get very close to 0 nits (e.g. via OLED or less optionally local dimming)