Matrox Electronic Systems 4SIGHT-M - Manual (Page 145)

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• Field
One of the two halves that make up an image. One half consists of the image's
odd rows (known as the odd field); the other half consists of the image's even rows
(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.
• Full-duplex mode
A communication method that involves sending and receiving information
simultaneously. For example, a switch can operate in full-duplex mode.
• Grab
To acquire an image from a camera.
• Half-duplex mode
A communication method that involves sending or receiving information.
However, this cannot be done simultaneously. For example, all hubs operate in
half-duplex mode.
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