Blackmagicdesign Teranex 2D Processor Installation And Operation Manual page 33

Understanding the Control Panel
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4:3 Ratio Image 16:9 Ratio Display
This aspect ratio yields an image with no loss of picture information, but the disadvantage is that it does not
fill the entire output display.
CCUT/ZOOM - Center Cut / Zoom
If the aspect ratio of the input video is 16:9 and is to converted to a 4:3 display, as in a down conversion,
the original image will be cropped on the left and right sides, which is often called a "Center Cut," so
that the center of the original image will fill the output display. This setting maintains correct geometry,
but results in a loss of picture on each side.
16:9 Ratio Image 4:3 Ratio Display
If the aspect ratio of the input video is 4:3 and it is to be converted to a 16:9 display, as in an up
conversion, the original 4:3 image will be cropped on the top and bottom, which is often called a
"Zoom", so that the image will fill the output display. This setting maintains correct geometry, but
results in a loss of picture on the top and bottom.
4:3 Ratio Image 16:9 Ratio Display
This aspect ratio fills the entire output image while maintaining correct geometry, but results in a loss
of picture information.