Originally Posted by Dahlsim
Actually a very pertinent question you raise when you consider that this thread was really inspired by video313 who's key question was "Which Pure Cinema Mode is Visibly Smoother for 1080p/24fps content?". That to my mind also raises the question of whether chasing down 24fps processing is really chasing down the "smoothest" presentation to begin with.
There could be a bit of not seeing the forest for the trees in focusing strictly on the question of what happens technically to the signal rather what is the end result on the movie experience.
For instance an interesting question that I never see raised is "Why do the Pioneer Engineers assign a different grayscale memory to Pure Cinema Advanced to begin with?
" In fact if the assertion being put forth by some in this thread turned out to be true then the implication is that an alteration to the grayscale was found desirable not just for Advanced mode but 72HZ 3/3 pulldown in general.
So is a different grayscale needed for better PQ if 72hz processing is engaged. The other part of the thread topic afterall is about the grayscale.
True, I was wondering the same thing, and then it hit me. I would expect that the engineers had
to give the 72 Hz mode a different array of grayscale settings (not necessarily a different temperature
of grayscale, mind you, but a different . . . I don't know, file? . . . to control the grayscale), because - as xrox pointed out - plasma displays modulate subpixel brightness by pulsing throughout the duration of each refresh. Obviously, if you are doing 72 refreshes per second, the timing of those pulses will have to be different than if you were doing 60 refreshes per second.
Again, we're all just hypothesizing here, but this makes for a pretty logical explanation of why calibrating the grayscale using ControlCal will not affect the "Advanced" mode. And if we are right about that, then that is one more suggestion that "Standard" is also refreshing at 72 Hz when a 1080p/24 signal is coming in.
Added later: But I also just looked back at the findings. Apparently the grayscale in Advanced mode is always
different than the calibrated grayscale (regardless of 24 fps or 60 fps sources), but Advanced only
flickers when it receives a 24 fps source. That adds another level of complexity. Perhaps Advanced has a third grayscale for when it is refreshing at 60 Hz? - seems unnecessarily complicated.