Datapath Wall Control User Manual
Page 59
Select
Automatic
and the data is captured in the same pixel depth as the desktop.
5-5-5 or 5-6-5
If either of these options is selected, the format will be captured at 16 bit. For most systems this is by far the most efficient
8-8-8
If this option is selected then the format will be captured at 32 bit.
Deinterlace
Deinterlace is only available if an interlaced source is being captured.
Bob
Bob is more suited to captures displaying motion and offers a higher frames per second.
Weave
Weave is more suited for images captured with little or no motion, any change in the captured image will cause artifacts known
as tearing.
None
Only a single field will be displayed.
Transfer Data
The
Transfer Data
section allows you to select which route captured data follows before it is displayed.
Direct to graphics card
Select
Direct to graphics card
and depending on the availability of off screen memory the captured data will be transferred
direct to the graphics card without passing through the system main memory. If there is not enough off screen memory, the
captured data will be transferred via system memory.
Via system memory
Select
Via system memory
if you want the data to be transferred to main memory before being transferred to the graphics
card.
Scaling
The capture is scaled when the size of the interior of the Vision window is different from the size of the data you are capturing.
The Scaling options allow you to choose how the capture is scaled.
Scaling Down
If
Fast
(default) is selected, the scaling down is performed before the data is transferred across the PCI bus.
If
Slow
(high quality) is selected, the captured data is transferred across the PCI bus without being scaled.
Scaling the capture down before transferring it across the PCI bus reduces the PCI bandwidth required.
If the capture is being transferred direct to the graphics card, the graphics chip does the scaling. The scaling algorithm used by
the graphics chip is better than the scaling algorithm used on the Vision capture cards.
If the RGB data is being transferred to system memory, the display driver does the scaling using a halftone algorithm. The
quality of the scaling and speed with which it is done will depend on the display driver and graphics card being used.
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