Posted By
TLC
on 2023-05-22
07:32:42
|  Re: Emulation video option you never knew you wanted until now!
Wouldn't wanna make you disappointed, but what you see is likely an artifact of your modern TV's RF signal handling versus it's baseband composite / baseband RGB video signal handling.
RF video is nothing more than composite video modulated onto an RF carrier. If the source video is non-interlaced, well, the demodulated video is supposed to be non-interlaced as well, since, RF modulation doesn't affect the timing characteristics of the modulating baseband video signal. (It does limit bandwidth, as part of the signal preprocessing before the modulation would happen, thus, there is usually a bit more blur and artifacts, compared to baseband composite video, let alone RGB; but no, there are no timing changes.)
Yes, official aerial transmission and interlaced video have been always going hand in hand with each other. Standard interlaced video (especially, standard interlaced composite colour video) has been optimized for aerial transmission (so that it could fit within given bandwidth well, and use that bandwidth to the best possible extent). That means there could be possibly problems if someone was to aerial transmit these less than standard colour video signals that our computers typically produce. There could be extra distortions and artifacts, likely. But those problems don't apply in an RF-modulator --> maybe 2M long coaxial cable --> RF demodulator setup. RF can and does carry practically arbitrary video signals within our home computer setups.
BTW, no huge differences can be observed between the RGB and RF links of an Amiga on standard analog household TV sets (I mean those with CRT's, analog RF tuners, SCART sockets, before the digital "picture enhancement" bells and whistles era). There is usually a lot of blur and colour bleeding on RF, yes. But no, there are no visibly different scrolling speed and stuff.
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