We Need a Definition Of A High Dynamic Range Display

November 1, 2015

"Here is a tentative partial definition, which mostly follows the definition put forward by CEA, but is it enough?.

• An HDR display must support a new gamma curve that can provide better gray scale rendering for a wider range of luminance values. That will likely mean support for the SMPTE ST 2084 HDR Electro-Optic Transfer Functions (EOTF), the so-called PQ gamma curve at a minimum, with other EOTFs, like the BBC/NHK Hybrid Log Gamma (HLG) EOTF, implemented as an option. It should also support SMPTE ST 2086 Mastering Display Metadata. CEA 861.3 provides for such support.
• An HDR display must support signaling to allow the TV to identify HDR content and to allow the source to know the capabilities of the HDR display. That means the display EDID data block has details on the max and min luminance and other parameters that can help optimize the HDR rendering. It also means that the display should support HDMI 2.0a, which allows for delivery of HDR signaling and 4K content at 60 fps.

So far, so good. The problems start to crop up when you want to specify color, contrast or luminance ranges."

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http://www.displaydaily.com/articles/32103?utm_source=Weekly+News+Update+10/30/2015&utm_campaign=Weekly&utm_medium=email