KONA Capture, Display, Convert v15.2 37 www.aja.com
Down Conversion
For down-conversion the following choices are available:
• Letterbox: image is reduced with black top and bottom added to image area
with the aspect ratio preserved
• Crop: image is cropped to fit new screen size
• Anamorphic: full-screen “stretched” image
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 down-converted
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.
For up-conversion 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
SD to SD
This pulldown is for SD to SD aspect ratio conversion.
• Letterbox: this transforms SD anamorphic material to a letterboxed image
• H Crop: will produce a horizontally stretched effect on the image; transforms
anamorphic SD to full frame SD
• Pillarbox: will produce an image in the center of the screen with black borders
on the left and right sides and an anamorphized image in the center
• V Crop: will transform SD letterbox material to an anamorphic image
Cross-Conversion
If you have an HD format as your primary and then select a secondary HD format
with a different frame size, the KONA 4 will perform a cross-conversion where
necessary (input or output) for “like frame rate” formats. For example, 720P 59.94
may be converted to 1080i 29.97. Converting from disparate frame rates is not
supported on the KONA 4 for cross-conversions.
