Matrox Orion Installation And Hardware Reference page 61

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DCF
Digitizer Configuration Format. A DCF defines the input
data format and among other things, how to accept or
generate video timing signals such as horizontal sync,
vertical sync, and pixel clock.
Display memory
See frame buffer.
Driver
A software program that services an operating system so that
the operating system can use a hardware device.
Field
One of the two halves that make up an image. One half
consists of the image's odd lines (known as the odd field); the
other half consists of the image's even lines (known as the
even field).
Frame
A single image grabbed from a video camera.
Frame buffer
A frame buffer is a dedicated storage area used for display.
Since a computer sends out data faster than a screen can
display it, the data is temporarily stored in the frame buffer.
Matrox imaging boards that have a display section typically
have two frame buffer surfaces: a dedicated or dynamically
allocated main (underlay) surface and an overlay (VGA)
surface. Separate VGA boards typically have only one frame
buffer surface, a VGA frame buffer surface.
If keying is enabled, those areas of the overlay frame buffer
surface that have a specified color allow the underlay frame
buffer surface to show through.
Grab
To acquire an image from a camera.