An entry-level vision system combining multiple video inputs with VGA
capabilities on a single PCI card.
The ELViS board is one of our legacy products that we continue to support.
Applications have included Library image capture and microscopy.
The board requires a suitable graphics card to run and we are able to supply
these for replacement.
Incoming standard composite video or S-VHS is processed by the
Philips SAA7110 decoder to provide digital luminance and multiplexed
chrominance (YUV) values which are written in page mode to the VRAM
by the video controller. Position in memory and reduction of X and Y
dimension is under software control. Frames or _elds may be captured
into memory and accessed within a region above 1 Mbyte. Image capture
and image memory access are mutually exclusive as they use the same
data path. The output timing is controlled by the VGA interface and
parameters held in the Video Controller. The digital VRAM data is
output via the VRAM's serial port and converted from 4:2:2 format to
RGB. An analogue output stage switches between the VGA graphics from
the VGA board and the recovered RGB under the control of colour
key/XY window as set up in the video controller.
