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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.
5500.book Page 133 Wednesday, August 4, 1999 4:41 PM