I ran into PSF with my AJA monitoring system back a few years before it could handle bandwidth of full progressive 1080 higher framerates. PSF is used there to send a progressive signal over an interlaced level bandwidth channel. The Progressive image is broken into 2 halves and then is played back as interlaced – exactly the process you’re following going from 23.98p to 29.97i, excluding the frame duplication of your pulldown, I believe. The catch is that if you play it back you’re actually looking at an re-assembled progressive image – it just comes to the screen in halves. Since the original was not combed to begin with the motion edges are not combed and appears exactly the same as when viewing it in progressive.
(The same is true for my BMD DeckLInk SDI – it has the option to send out 23.98p or 23.98psf – for monitors that couldn’t handle true P over SDI).
I might be wrong, but the bottom line is that if you don’t use Optical Flow or similar process to create new interpolated motion frames between your actual progressive frames, you don’t end up with combed motion edges anyhow. As long as the field order is correct in playback you’re golden.
So back to your question – It’s really something that the panel builders for the TVs can only answer, varied by make and model. They build TVs to sell against others in TV walls of consumer stores. Whatever they can do to make images “pop” on there will ultimately lead to a sale. And there is a lot of dark arts going on in consumer TVs to achieve that…
Francois
FireTrigger Inc.
https://firetrigger.com