The term Matte refers to a black and white representation defining the transparent (background) and opaque (foreground) parts of an image during compositing.
Portions of the matte that are grey are treated as semi-transparent, which is very useful in progressively smoothing edges between foreground source material and inserted background imagery.
TriCaster’s supplies a digital version of this traditional tool. The controls under the Matte label, as you would expect, allow you to define and adjust the matte for the corresponding video input.
For more information please download the entire document at new.tk/rt-m