I was watching a live boxing fight from 1962, How did they add graphics or text to the screen on sports events, news, etc?
In: 190
It’s called *chroma keying.*
The graphic was created/shot on another video feed. Everything that wasn’t the graphic was a solid primary colour (usually blue back then. Now they use green).
The video mixer would overlay everything from the graphic feed that wasn’t that primary color, essentially removing one color from the graphic video feed. Graphics were designed to look good with only two colors to facilitate chroma keying.
On black and white TV. The graphic background was black. Everything that wasn’t black would be part of the overlay.
Latest Answers