Glossary

Brightness

The balance of light and dark shades in an

 

image.

Composite video A type of video signal that encodes picture,

 

luminance, and synchronization information so

 

it can be carried in one signal.

Contrast

A measure of the tonal differences between the

 

highlights and shadows of an image. In a

 

high-contrast image, light areas are very bright

 

and dark areas are very dark, with relatively few

 

levels of gray between white and black.

 

Contrast is decreased by adding grays.

NTSC

A 525-line video broadcast format developed

 

by the National Television Standards

 

Committee. NTSC is widely used in North

 

America, Mexico, and Japan.

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