20
Aspect
When the input is 4:3 (the image dimension
usually used by cable television, and video
cassette), the user might want to eliminate the
“black spots” on the left and the right of the
screen.
By doing this, the user might choose
WIDE
SCREEN
, which distorts image by stretching
the whole image horizontally
In most cases, widescreen videos (such as
DVD movies’ widescreen modes) will have
“black spots” on the top and the bottom of the
screen (this is called letterbox). To eliminate
this, the user may select 16:9 zoom.
Sometimes the television might receive
widescreen signals. If the user sets the mode
on 4:3, the image might be distorted into a thin
image. By fixing this, the user may switch to
widescreen mode
