AJA KONA LHI Installation And Operation Manual page 48

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Format Screen Settings
Primary (Framebuffer) Format—this pull-down menu shows the currently selected format.
This pull-down appears in both the Primary Format area of the Formats screen as well as
the Secondary Format area (if present). If you select an alternate value in the Primary
Format using the pull-down, it will change the format used by the KONA LHi framebuffer.
When a change is made via the Video Format pull-down or by clicking an icon (widget)
and selecting a new format via a contextual menu, the block diagram will change to
reflect the new format.
For a complete list of supported Video Formats, see
VANC—enables or disables VANC data capture and playback.
Secondary (Converted) Format—the formats available can vary based on what the Primary
Format is and the input signal (frame rates of input sources limits the to/from conversion
choices). The "Secondary Video Format" pull-down menu lists all compatible formats in
black (incompatible formats are shown in gray and cannot be selected). This allows you
to see what you've chosen, and also see those formats that are compatible with the
selected Primary format.
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 discern
at a glance if you are working with progressively segmented frame formats (sf in the AJA
Control Panel) as compared to progressive frame formats which will show only "p. "
Crossconversion: if you have an HD format as your primary and then select a secondary HD
format with a different frame size, the KONA LHi card will perform a crossconversion
where necessary (input or output) for "like Hz" formats. By like Hz this means that 720P
59.94 may be converted to 1080i 29.97 (59.94Hz). Converting from disparate Hz is not
supported on the KONA LHi card for crossconversions. The example below shows 1080i
to 720p.
Down (Conversion)—for downconversion the following choices are available:
Anamorphic: full-screen "stretched" image
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
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.
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
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
"Video Formats" on page 61.