01-10-2021, 01:08 PM
(01-10-2021, 12:42 PM)ppppenguin Wrote: While some (many?) displays do all sorts of clever things with refresh the fact remains that the input to the display system is a sequence of pixels and lines, starting at the top left.Exactly. And there are not a lot other ways to do it. All will be frames, lines and pixels per line. Though the lines could have been vertical and they could have started bottom, or right.
I'm next going to write about common consumer methods of video to a display:
Composite
S-Video
R G B (SCART/Peritel, RCA, CGA, EGA, VGA)
Component Video
USB methods (but not USB-C video)
Firewire
DVI, HDMI, Display Port and USB-C video are all related.
Analogue RF (still used)
Analogue Video Senders, sometimes called Digisenders
Common Digital tuners built in (Satellite, DVB-C, DVB-T, ATSC)
Video over Ethernet,WiFi & BT in screen casting.
My Toshiba HDTV has: Composite, RGB Scart, RCA Component, S-Video, VGA, Multiple HDMI, PAL Analogue RF, DVB-T
My newer 4K HDR has no RCA Component, S-Video or VGA. It does have 4K capable DVB-S2 as well as DVB-C and DVB-T2. Also DVB-S and DVB-T). It also supports Bluetooth, WiFi and Ethernet for streaming, screencasting and Apps. But you'd be mad to enable those.
Perhaps later Jeffery can explain the various professional video connections including SDI.
Summary:
1) All video, analogue or digital, somewhere at source and destination, is rasterised frames (lines of pixels).
2) Colour is a trick. It's not perfect even for all humans that are not "colour blind". Normal human colour blindness is a difference of perception commonly in red-green and rarer blue green. Mostly men. Actual monochrome vision is very rare in humans. Cattle see monochrome, dogs have reduced colour perception.
3) There are several ways cameras acquire colour and many methods of displaying it.
4) Only some raw R G B data from 3 chip or 3 tube cameras has the same resolution for colour and luminance. RGB at the consumer end has the same resolution for colour content as any other consumer signal of the same luminance resolution. Consumer colour resolution is always less than Luminance.
