system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do they remaster old tv shows in HD?

Surely if something was filmed originally in standard definition, and was never re-filmed, they wouldn’t be able to enhance the quality, right? All they have is lower quality footage with less pixels, how can that be converted into HD?
gpt
Old analog stuff was filmed on film. Film is just photographs and doesn't store data in 'pixels' but on the color change of microscopic crystals so it's storing a ton more data than even the highest resolution tv.