AJA KONA 4 Installation & Operation Manual page 43

Pixel Format
RGB Range
Follow Input
Format Conversions
Cross-Conversion
Up Conversion
Down Conversion
KONA v12.4
The "Secondary Video Format" pull-down menu lists all compatible formats for selection
(incompatible formats are not shown). This allows you to see what you've chosen, and
also see those formats that are compatible with the selected Primary format.
Use this pulldown menu to choose: YUV-10, YUV-8, RGB-10, or ARGB-8
The RGB Range pulldown menu allows you to select either Full-range (0-1023) or SMPTE
range (typically 64-940) for RGB color output.
For video formats supported by the KONA models, refer to
NOTE: The AJA Control Panel software uses the abbreviation "sf" instead of "psf" when referring to
"progressive segmented frame" formats. In the manual and in other literature you may see
either of these acronyms used interchangeably. Visually, it is easier to recognize:
• "sf" for progressively segmented frame formats
• "p" for progressive frame formats
Enabling the Follow Input checkbox allows the Control Panel Buffer to auto-switch to
whatever is the detected input format. This feature works only if the controlling
application supports input-based capture—AJA Control Room for example.
If you have an HD format as your primary and then select a secondary HD format with a
different frame size, the KONA 4/3G will perform a cross-conversion where necessary
(input or output) for "like Hz" formats. "Like Hz" means that 720P 59.94 may be converted
to 1080i 29.97 (59.94Hz). Converting from disparate Hz is not supported on the KONA 4/
3G for cross-conversions. The example below shows 1080i to 720p.
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.
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
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
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"Specifications" on page
www.aja.com
81.