Anything Wider Than Rec.709 Is WCG

Just as ‘anything greater than 100 nits’ is not a definition of HDR, neither is ‘anything wider than Rec.709’ necessarily WCG. Display Daily reports:

Chris Chinnock, commenting on a story about a new laser projector, said, “It annoys me when multiple companies cite a color gamut spec of 110% of BT.2020. What they mean is the area coverage is 10% larger than the area coverage of the BT.2020 standard, because their RGB primaries do not align with the BT.2020 primaries. However, if you look at how much of the BT.2020 standard they cover, it is actually 90%. This is the spec they should report.”

Then there’s this, from BenQ:

“There can be many instances where 125% of color gamut covers 90% or less of the color gamut.”

And lastly, here’s Steve Shaw, CEO, Light Illusion, who ridicules the Ultra HD Alliance HDR display spec, which is badly in need of a revision:

“Additionally, the Ultra HD specification, while using Rec2020 as the target (envelope) colour space, actually specifies that any Ultra HD display only has to reach 90% of DCI-P3 to be accepted as a UHDTV display – and volumetrically, 90% of DCI-P3 is basically Rec709!”