NTSC filters

These replicate the cables used to connect the system to the TV. They vary in quality, with the lowest being RF, then composite, then s-video and RGB (scart) being the highest quality. Many emulators have NTSC filters built into them. They can also be separately downloaded in .filter format. They were developed by blargg. Possibly others? More history.

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Win32 Win64  Linux32  Linux64 MacOS

Description

(images needed)

RF

The lowest quality. Very blurry.

Composite

Higher quality than RF, but still very blurry. This is what most systems used as default.

S-video

Much sharper image.

RGB

The highest quality possible.

Effects

The level of blur in RF and composite cables are needed for dithering to work. S-video, and RGB are too clear to produce dithering.

SNES games make use of the color correction in these cables.

Emulators

Many emulators have them built in.

Emulator	System	NTSC filters	Notes
Nestopia	NES	✓
puNES	NES	✓
zsnes	SNES	✓
Snes9x	SNES	✓
Genesis Plus GX	Sega consoles
Kega Fusion	Sega consoles