Rec 709 vs DCI P3? - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 6 Old 12-14-2016, 12:26 PM - Thread Starter
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Question Rec 709 vs DCI P3?

Do we know what percentage of DCI P3 that 100% Rec 709 covers? I can't seem to find the answer anywhere. Trying to gauge the benefit of an HDR TV over my current SDR TV.

Thanks in advance,
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post #2 of 6 Old 12-14-2016, 01:08 PM
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"The DCI-P3 Color Gamut is 26 percent larger than sRGB / Rec.709.
The Rec.2020 Color Gamut is 72 percent larger than sRGB / Rec.709 and 37 percent larger than DCI-P3."

http://www.displaymate.com/Display_Color_Gamuts_1.htm
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post #3 of 6 Old 12-14-2016, 01:22 PM
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Depending on the set you currently have, it may not even be displaying all of rec709. My old DLP was supposedly 12 bit but for Bluray and OTA my new 10 bit oled blows it away for color fidelity. I'm going back through and rewatching movies and playing games because it's like a brand new experience, and with a 4k source fuggetaboutit.

If the set you are considering will display close to 100% of P3 you most likely will be getting a big upgrade over your old set.
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post #4 of 6 Old 12-14-2016, 01:24 PM
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Here are a couple of CIE color coverage charts that might help you with your question.

According to the second chart what i find really/really sad about DCI-P3 color coverage of 46% of CIE is the fact that NTSC/PAL/SECAM analog color standards used from the 1950's until digital broadcasting standards were set in the 1990's already offered 47% CIE color coverage, which is a little wider than the vaunted and much anticipated DCI-P3 standards.

Color coverage for Rec.709, the current digital standard, offers only 34% CIE color coverage !

So, we went from 47% CIE color coverage from the 50's until the 90's, then we got 34% coverage from Rec.709 followed by 46% DCI-P3 CIE color coverage, and now we can only dream about that 67% coverage promised by Rec.2020 standards...
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post #5 of 6 Old 01-23-2017, 02:01 PM
 
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Yes but for rec 2020 you're at 97% or so of Pointer's Gamut, if I remember correctly, which encompasses all the colours you're likely to ever see in the real world.

Going beyond rec 2020 will require many primaries, something that's not really economical (yet).
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post #6 of 6 Old 01-23-2017, 03:49 PM
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Quote:
Originally Posted by RLBURNSIDE View Post
Yes but for rec 2020 you're at 97% or so of Pointer's Gamut, if I remember correctly, which encompasses all the colours you're likely to ever see in the real world.
Not counting specular highlights.

"By specular reflection objects can reflect colors that are outside the Pointer’s gamut." from http://www.tftcentral.co.uk/articles/pointers_gamut.htm.
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Last edited by GregLee; 01-24-2017 at 09:08 PM.
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