[HN Gopher] Analog Television Simulation
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Analog Television Simulation
Author : feross
Score : 87 points
Date : 2022-01-29 03:10 UTC (19 hours ago)
(HTM) web link (substack.net)
(TXT) w3m dump (substack.net)
| a-dub wrote:
| this is really impressive!
| s1mon wrote:
| This is fun and all, but I'm not sure why one would go to the
| effort to simulate so much of the CRT experience, but not force
| the window to be the right aspect ratio?
| Cyberdog wrote:
| I know, right? This looks even funkiner than probably intended
| on my vertically-mounted monitor.
| dashwehacct wrote:
| Darn. I switched to channels 3 and 4 and I still can't play my
| NES.
|
| Did someone touch the VCR again!?!?
| omginternets wrote:
| Anyone else attempt to tune into channel 99?
| wk_end wrote:
| Also possibly of interest is CLK aka Clock Signal, an emulator
| that outputs a composite "signal" instead of pixels:
|
| > Consider an ordinary, unmodified Commodore Vic-20. Its only
| video output is composite. Therefore the emulated machine's only
| video output is composite. In order to display the video output,
| your GPU must decode composite video. Therefore composite video
| artefacts are present and correct not because of a post hoc
| filter but because the real signal is really being processed.
|
| https://github.com/TomHarte/CLK
| BugsJustFindMe wrote:
| This is phenomenal. Absolutely beautiful. RIP my back button
| though.
| omginternets wrote:
| It's also a Web 1.0 simulator! ;)
| mobilene wrote:
| Hunh, all the stations are UHF.
| rzzzt wrote:
| Maldita Castilla sports a very sharp, almost Trinitron-like
| appearance. The emulated display mask appears to have horizontal
| slits and is layed out like brickwork (see screenshots near the
| middle of the page, you'll have to zoom in a little):
| https://locomalito.com/maldita_castilla.php
|
| Does anyone know which type of CRTs had this look?
| andrewstuart wrote:
| You can generate a real broadcast signal from a $5 esp8266 with
| this code: https://github.com/cnlohr/channel3
|
| Here's the demo: https://www.youtube.com/watch?v=bcez5pcp55w
| kloch wrote:
| NTSC has a number of artifacts but this simulation added RF
| decoding artifacts as well.
|
| The RF artifacts completely overwhelm the NTSC artifacts. It
| looks like a fairly weak RF signal plus other RF noise/harmonics
| in band.
| 323 wrote:
| Something is off, it didn't quite look like this.
| squarefoot wrote:
| It would need some blurring and low res pixelation to be
| convincing. Also, double images could be implemented to emulate
| signal reflections on obstacles.
| pedrogpimenta wrote:
| Maybe it's the fact that it isn't really a tube screen, it's in
| fact a simulation of one through a modern screen. But thanks
| for such a constructive comment.
| sxiin wrote:
| Also, check out Cathodemer.
|
| "Cathodemer is a realtime video production instrument with a CRT
| display simulator. It features analog-style RGB signal
| oscillation synthesis, input source mixing and manipulation,
| recursive color shape synthesis, sprite animation engine and
| various classic video effects."
|
| https://store.steampowered.com/app/697860/Cathodemer/
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