The establishment of standards for high dynamic range (HDR) viewing in the home and other 4K UHD performance issues needs to take into account a wide range of parameters including ambient light and its effect on contrast ratio, and not focus merely on peak light.
That was the assessment of some video experts speaking on a Next TV panel at CE Week in New York City Tuesday.
“Research has been released now that has established the dynamic range in peak light output at more than 1,000 Nits, and I am going to take issue with that research,” said Joe Kane (pictured above with mic), video technology consultant to Hollywood and a founder of the Imaging Science Foundation. “We did similar research with Eastman Kodak in the Seventies, and what we found is, yes, consumers want upwards of 1,000 Nits [of peak brightness], as has been proposed, and that’s true, but we also found that when you put somebody in a room to watch a two-hour movie, the ambient light has to be up there as well.”
Kane explained that if a picture is too bright in a dark room it becomes fatiguing to the eyes, and reflected light on the screen impacts on the contrast performance seen by viewers.
“Because contrast ratio goes down as ambient light goes up, I would like to propose that high dynamic range have to do with contrast ratio and not absolute light output,” Kane said. “We can go as high in light output as we want as long as the contrast ratio that we see specifies what is high dynamic range. If you are going to watch a set with 4,000 Nits, you are going to need an awful lot of light behind that set if you are going to watch it for two hours.”
Read more on the panel’s discussion for standards establishment for HDR, wide color gamut and other issues after the jump:
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