HiGame

Last week, AMD hosted its first RTG (Radeon Technology Group) tech conference in Sonoma, California since restructuring the company to give discrete graphics more independence. The company laid out its plans for graphics technology in 2016, including new FreeSync options and support for High Dynamic Range (HDR) monitors.

Current monitors and displays are only capable of reproducing a fraction of the luminance the human eye can perceive. The chart below shows the luminance values of common light sources, from sunlight at 1.6 billion nits down to ultra-black, at 0.01 nits. According to AMD, the average PC LCD only supports 0-250 nits, while a high-end LCD TV might stretch to 350-400 nits, at most.


That’s going to start changing in the next 12 months, thanks to new HDR support from high-end 4K televisions and cutting-edge OLED technology. HDR LCD’s can theoretically hit 1K today with 2K on the market by the end of next year, while OLEDs can push 500 nits today and up to 1K in 12 months.

Improving display quality isn’t just about increasing luminance; HDR support requires a new color standard as well. The diagram below shows a number of color space standards used in various applications and fields. The outer horseshoe is known as the chromaticity diagram — those are all the colors that a human with normal color vision can perceive. The innermost triangle with the purple dot at the top is the SRGB color space that both Blu-ray and Windows use by default. (Whether or not your LCD actually displays this space correctly is an entirely different topic).



If you work in professional editing or design and have a high-end monitor and 10-bit-capable display, you probably work in AdobeRGB (shown in green), while the Digital Cinema P3 standard is shown in yellow. The latest standard to arrive on the scene with UHD Blu-ray is known as Rec2020. Rec2020 covers 75.8% of the human chromaticity diagram, compared to the 35.9% that SRGB covers. The P3 standard is smaller, at just 53.6%, but still represents a substantial upgrade over SRGB.



SDR on the left, HDR on the right

Not every Rec2020 display is going to qualify as an HDR display, but there should be some overlap between the two capabilities on both consumer monitors and upcoming 4K HDTVs. AMD’s Radeon Technologies Group highlights next-gen HDR, new FreeSync capabilities gamers may remember HDR as a DX9 feature that debuted in Half Life 2’s Lost Cost demo, but there’s a critical difference between that implementation and the upcoming capability. Back then, internally rendered HDR was mapped back to SDR (Standard Dynamic Range) for output to a conventional display. The effect, while still striking, wasn’t identical to what an HDR display would offer.

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