AJA IOExpress, Инструкция по установке и эксплуатации, Страница: 31 / 68

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Io Express Installation and Operation Guide — Using the AJA Control Panel
Framebuffer —The framebuffer is the “engine” in Io Express where active video
operations take place using 3rd-party editing applications, or even Io Express itself.
The framebuffer has a format (called the “Primary Format” and color space that it
follows, as defined in the AJA Control Panel or via external application software. It is
important to realize that inside the computer workstation, a number of applications
can use the Io Express (as you switch from window to window) and it may not always
be obvious which currently controls it.
The AJA Control Panel displays the name of the application controlling the Io
Express. In some cases, applications may not always properly “let go” of the I/O
interface as another takes over—you’ll be able to tell by looking at the Control Panel
“In Use” display.
Controlling Application
Primary Format —The video format currently assigned to Io Express. This is the format
that the framebuffer will use and is shown in the Control Panel using the color blue.
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 also indicate that
something is in the primary format. So, for example, if you see that the input and
output icons are blue, then you know that the same format is used throughout the
video path and that no format conversion is being performed. If a different color is
displayed on the input or output, say green for example, then you know that Io
Express is performing a format conversion in the video path.
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 (i.e., the
“Primary Format”). This can be seen at a glance because the color will be different
than blue.
Input/Output Icons —The input and output icons are triangles that together with their
color show all the input and outputs and their status (selected, not selected, input
present or not, format, etc.). A complete video path is shown when inputs and
outputs are connected with lines going to/from the framebuffer.
Input/Output Icon
Conversion Icons— when an input or output is a different standard than the
framebuffer, the Io Express may be down-converting the signal to the selected
standard. This may be automatic, because it's detected an input signal that differs
from the standard currently selected, or because you've explicitly told it to convert.
In either case, the block diagram will show the conversion by displaying a conversion
icon in between the input/output and the framebuffer
.
Down-conversion icon
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