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Convergent Design Odyssey
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Old November 5th, 2009, 07:11 PM   #31
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Quote:
Originally Posted by Gints Klimanis View Post
Anyone would rather have the 4:4:4 still than the 4:2:2 still.
Hi Gints-
Just for clarification, yes your compueter can tell the difference between 4:2:2 and 4:4:4, especially doing green/blue screen work. But the human eye can not discern the difference. The color sampling of the human visual system is no better than 4:2:2.

The real-world requirments for 4:4:4 recording are extremely limited. That's why there is only a handful of video cameras with this capability and they all cost mega dollars.

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Old November 5th, 2009, 09:36 PM   #32
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Mike Schell wrote "But the human eye can not discern the difference. The color sampling of the human visual system is no better than 4:2:2."

From past study, I recall the statement on color resolution perception to be attached to a distance called "normal viewing distance". Chroma subsampling artifacts, including false colors, out-of-gamut colors, bleeding, all of which can be animated, are not included in that color perception statement.

Modern uses include viewing from a computer (less than a normal viewing distance), printing, cropping, and post-processing. In my case, I am interested in grabbing stills. From my experience with the venerable 4 Megpixel D2H DSLR in telephoto applications, it is easy enough to set a crop that no longer provides adequate resolution for print output even on a 4x6" or even display on monitors with modern sizes 24+"and 1920x1200 pixel densities. Come on guys. Go easy. Higher resolution is appreciated.

Last edited by Gints Klimanis; November 6th, 2009 at 01:21 PM.
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Old November 6th, 2009, 11:34 AM   #33
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Hi Gints-
Understood, but all we can do with the nanoFlash is provide the absolute best quality give the limitations of the incoming HD-SDI signal. That said, look for an announcement next week for yet another improvement in the nano video quality.

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Old November 6th, 2009, 05:15 PM   #34
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"improve video quality"???

hmm. now this sounds interesting.
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