User Manual

Table Of Contents
Io XT/4K v10.5r2 www.aja.com
26
Color Meanings: All items in the AJA Control Panel block diagram are color-coded to show what is
happening in realtime. This applies to both icons and text. These colors have the
following corresponding meanings:
Blue: video is same format as the Primary Format (framebuffer)
Red: the selected operation cannot be performed
Ye l l ow : reference video (black burst or other reference source)
Green: indicates that Io XT/4K is performing an active change to the video making it
different from the Primary Format (e.g., down-conversion).
Primary & Secondary
Video Formats
In Io XT/4K operation, the Primary Format is the media format written to disk and used in
your project. The Secondary Format is a selection for format conversion.
Primary Format: The video format currently assigned to Io XT/4K. This is the format that the framebuffer
will use and is shown in the Control Panel using the color blue. It is the format that the
third-party application software will either receive from the AJA hardware, or is giving to
the hardware. All icons in blue are the same as the Primary Format used by the
framebuffer. Also any text descriptions in the block diagram that appear in blue indicate
that something is in the primary format. For example:
If the input and output icons are blue, you know that the same format is used
throughout the video path. No format conversion is being performed.
If the input or output icon colors differ (blue input and green output icons for example),
you know that a format conversion is being performed.
Secondary Format: Any format other than the currently selected Primary Format, is a secondary format. As
described previously, this means that either the Inputs or Outputs are somehow different
from the framebuffer’s assigned format—the Primary Format. A conversion is readily
apparent because of the color change from blue. In the example below, a secondary
format of 720p59.94 is selected on the Format screen and is then used for output at SDI 2.
Figure 23. Setting the Secondary Input Format