AJA io XT, Installation And Operation Manual, Page: 9 / 66

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Io XT Installation and Operation Manual — Overview
Crossconversion is high-quality hardware-based, providing capability to
streamline dailies and offers true broadcast picture quality in realtime. Because
these functions are in hardware, they are available full time, all the time—with no
CPU load. Such conversions are useful for cost effective monitoring, making
standard definition dubs of an HD project, or upconverting from a standard
definition FCP project to an HD deliverable.
About Primary & Secondary Video Formats
In Io XT operation, the Primary Format is the media format written to disk and
used in your project. The Secondary format is that which may be input for
capture or output from Io XT to VTRs or other devices. Down-conversion may be
applied to an input or on output.
The Primary Format menu allows you to select the video format used in your
current project.
Conversion is performed based on the Primary or Secondary Format settings.
Io XT can down-convert the input format (when designated as a Secondary
Format input) to the selected Primary Format. Or you can set a Secondary Format
output that will be a down-conversion of the Primary Format.
Convert Mode
Convert Mode allows selection of a mode for conversion between High-
definition and Standard-definition formats. Io XT supports up-, down-, and cross-
conversion plus SD-to-SD aspect ratio conversions. See the following tables for
conversion options.
All conversions use AJA 10-bit hardware inside the Io XT.
For example, to do a down-conversion on an HD input:
Set the Primary Format as an SD format
Select the correct HD format with an (I) input designation for the Secondary
Format, then
Choose a “– Secondary” Video Input type
Down-conversion display mode choices that may be available include:
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Anamorphic: full-screen
• Letterbox: image is reduced with black top and bottom added to image area
with the aspect ratio preserved
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Crop: image is cropped horizontally to fit new screen size