Instruction manual

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AJA Control Panel, Formats Tab Showing 1080i Downconvert
Up (Conversion)—the Up and Down pull-down menus are available when
conversion has been selected for the video path to/from the framebuffer and like
Hz formats are selected (the one exception is 1080PsF 23.98 which can be
downconverted to 525i 29.97.) Different choices will be available depending on
the type of conversion and formats being converted. SD to SD conversions are
essentially aspect ratio conversions to accommodate transforming anamorphic
images to letterbox or vice versa. Note: The AJA Io HD is not a standards
conversion device for conversions such as NTSC to PAL or vice versa.
For Upconversion the following choices are available:
Anamorphic: full-screen “stretched” image
Pillar box 4:3: results in a 4:3 image in center of screen with black sidebars
Zoom 14:9: results in a 4:3 image zoomed slightly to fill a 14:9 image
with black sidebars
Zoom Letterbox: results in image zoomed to fill full screen
Zoom Wide: results in a combination of zoom and horizontal stretch to fill
a 16:9 screen; this setting can introduce a small aspect ratio change