AJA UDC - Manual (Page 17)

UDC Mini-Converter v2.3r1 www.aja.com 17
14x9: Image is reduced slightly with aspect ratio preserved. Black is added top and
bottom, and the left and right sides are cropped.
Auto AFD: Automatically selects the best Downconvert mode based on the input
video's Active Format Description (AFD) code. If the input video is not carrying an
AFD VANC code, the Downconverter defaults to crop.
Letterbox: Image is reduced with black top and bottom added to image area, with
the aspect ratio preserved.
Aspect Convert: Determines the mode when converting from SD input video to an SD
output video format. There is no DIP switch equivalent for this control. The setting is
saved in nonvolatile memory in the module and used for all subsequent operation. These
are the choices:
Off (default): The input image is copied to the output with no scaling.
Letterbox: The input frame is scaled vertically to a 16x9 "letterboxed" size
(anamorphic to letterbox conversion).
H Crop: The input frame is scaled horizontally to 16x9, then center-cropped
(anamorphic to center crop conversion).
Pillarbox: The input frame is scaled horizontally to make a pillarbox output (4x3 to
anamorphic conversion).
V Crop: The input frame is scaled vertically to make a vertically cropped output
(letterbox to anamorphic conversion).
14x9: The input frame is scaled horizontally and vertically as a compromise between
H Crop and Letterbox (anamorphic to 14x9 conversion).
Loss of Input: Determines what action is taken when input video is lost. These are the
choices:
Black (default): The output goes to black.
Freeze: The output freezes on the last good frame.