EBU clearly states 2.35 gamma (2.2-2.5 leeway) in its recommendations for video mastering monitors. EBU recommend for consumer flat panels 2.35. The British film council recommends for projectors being used with material mastered to REC 709 like blu-rays 2.45 gamma. So maybe in the UK we do things a bit differently.
I believe gamma should be dictated by the environment room lighting, screen brightness and field of view. Not the display contrast.
Video material should be mastered to look OK at 2.2-2.5 gamma so if the room is brightly lit you could tweak gamma down a bit, or if the room is pitch black you could tweak gamma up a bit, to retain the perception of contrast.
Originally Posted by Chronoptimist
Source contrast (film type used, digital camera dynamic range etc.) has no relevance to display/final image contrast.
The post I referred to was the entire chain camera to review room screen, or video mastering monitor. I was trying to figure out if there was anything to see down there except for black, answer I came to is no, you just get darker black no detail is present to be revealed by having higher contrast.
I guess if you want higher contrast than the review room cinema or video monitor depends on if you are only trying to reproduce a reference cinema, or what the director saw, and so only need a setup that is good enough. Or you desire an exaggerated black for exaggerated contrast especially in dark scenes, a setup that is as good as possible.
You can display the source at lower contrast than was used during mastering.
When the master is encoded the lowest code value of luminance is assigned to the lowest luminance / black level it can display. When displayed with a higher black level - lower contrast than the master the bottom (5 or 10% depending on cinema or video) curve is made gentler - compressed so all the shadow detail is displayed.
You can also display it at a higher contrast than was used during mastering, but some standards do not recommend it.
Commercial cinema DCI standards state "Reference Image Parameters and Tolerances. In order to eliminate unwanted detail or discoloration in near blacks, it is critical that Mastering Projectors have an equal or higher sequential contrast than all exhibition projectors."