AJA Io4K - Manual (Page 31)

Io XT/4K v10.5r2 www.aja.com 31
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.
For a complete list of Io XT/4K Formats see "Appendix A: Specifications on page 54" .
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.”
Pixel Format: Use this pulldown menu in Io 4K to choose: YUV-10, YUV-8, RGB-10, or ARGB-8
RGB Range: The RGB Range pulldown menu allows you to select either Full range (0-1023) or SMPTE
range (typically 64-940) for RGB color output.
VANC Checkbox: When checked ON, the VANC checkbox tells the Io XT/4K to capture and process any
ancillary data in the SDI stream. This can include Closed Captioning data, and other types
of metadata. Applications such as Premiere Pro and Final Cut Pro will not capture or
output this data through the Io XT/4K, if this box is not checked on.
Io XT Cross-conversion: If you have an HD format as your primary and then select a secondary HD format with a
different frame size, the Io XT 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 Io XT for cross-
conversions. The example below shows 1080i to 720p.
Io XT 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
Io XT 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
Io XT 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