Algolith HD to SD Downconverter XVC-1001-DC - Manual (Page 21)

XVC-1001-DC Guide to installation and operation
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Anamorphic: Scales the 16:9 input image to fit horizontally and vertically
into the 4:3 output image. The image is compressed and deformation will
occur.
Letter Box 25%: Scales the 16:9 input image to fit horizontally into the
4:3 output image, leaving a blank area equal to 25% of the image’s height
(12.5% on each side). The original image is complete.
Crop 25%: Scales the 16:9 input image to fit vertically into the 4:3
output image, discarding a left and right portion of the input image equal
to 25% of the image’s width (12.5% on each each side).
14:9: Scales the 16:9 input image to occupy a 14:9 area of the 4:3
output image. The left and right portion of the original image image are
slightly cropped, while leaving a blank area on top and bottom, equal to
12.5% of the image’s height (6.25% on each side).
Custom: Allows the user to determine the portion of the 16:9 original
image to downscale to fit the 4:3 output image. The selected portion of
the original image is scaled to fit the 4:3 output image horizontally and
vertically, under the Anamorphic method.
Aspect Ratio Output H Custom
The Aspect Ratio Output H Custom function allows the user to set the
number of pixels to crop from each side of the original image, or to add
to each side of the original image, before it is downscaled to the 4:3
output image.
Aspect Ratio Output V Custom
The Aspect Ratio Outuput V Custom allows the user to set the number
of vertical lines to crop from the original image, or to add to the original
image on top and bottom, before it is downscaled to the 4:3 output
image.
See drawings below for an example of positive values in custom Aspect
Ratio settings:
50 lines
100 pixels 100 pixels
50 lines
16:9 Original Content Custom downscaling