Datapath X4, Руководство пользователя, Страница: 14 / 28

14 18/10/2010
Selecting the Regions to Be Displayed
Each output of the x4 can take its display data from any arbitrary rectangular region of the
captured input image. The factory default for these cropping rectangles configures the four
monitors to display a quarter of the input as a 2x2 array, and these proportions are
maintained across different input resolutions.
For a 1080p input, this means that 960x540 pixels from the input image would be upscaled by
a factor of 2 in each direction if the selected output resolution was 1080p.
However if the input resolution were to change to 1600x1200, then for the same output
monitor the x4 would upscale from an 800x600 region and would reprogram its scale factors
to 2.4 horizontally and 1.8 vertically to support the same 1080p monitor.
The cropping regions can be assigned aribitrarily and can overlap, the only restriction being
that the resulting scale factor must be greater than 1.0 (ie 1:1 or upscaled) in either direction.
As an example it is possible to use the x4 to output four identical copies of the input signal
(providing the resulting output timings remain within the capabilities of the single-link DVI
outputs).
The regions of the input image to be displayed on a given output monitor can be programmed
via USB by using the Datapath
configuration application .
In order to support portrait orientation of monitors, the source data can be rotated by 90º,
180º or 270º as it is output to the monitor.