The HDR (High Dynamic Range) video format is a video display
gamma-curve gamut standard updated for the expanded color-rendering
capabilities of today’s ultra high-definition television (both 4K and 8K)
displays. The standard dramatically increases the number of colors that
can be carried in a UHD signal to raise the number and luminescence of
colors a UHD systems can display. The HDR format will replace the
outdated SDR (Standard Dynamtic Range) format, which will become
obsolete at some point in the near future.
The move toward the HDR (High Dynamic Range) video format was
brought to the consumer home video market with the introduction of
4K UHD (Ultra High-Definition) Blu-ray Discs and players in 2016.
HDR UHD is also available from some streaming services. HDR video
displayed on an SDR system will appear as a very flat, almost greyish
picture. The HDR format requires updated home video equipment
(HD monitor and UHD Blu-ray Disc player) to display as desired.
As HDR is applied to home video products, especially to black & white
films of the silent and golden eras, the range of greytones will
dramatically increase and may for the first time ever emulate the
ethereal quality of projected nitrate prints.
More details on the HDR standard video format may be found on Wikipedia.
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