Analog Television Simulation

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

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/

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

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?

This is phenomenal. Absolutely beautiful. RIP my back button though.

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.

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?

Something is off, it didn't quite look like this.

Darn. I switched to channels 3 and 4 and I still can’t play my NES.

Did someone touch the VCR again!?!?

Anyone else attempt to tune into channel 99?

Hunh, all the stations are UHF.

this is really impressive!