Glossary 71
• LVD S
Low-voltage differential signalling. LVDS offers a general-purpose, high bandwidth
interface standard for serial and parallel data interfaces that require increased
bandwidth at high speed, with low noise and power consumption.
• Progressive scanning
Describes a transfer of data in which the lines of the source are written sequentially
into the destination buffer.
See also interlaced scanning.
• Real-time processing
The processing of an image as quickly as the next image is grabbed.
Also known as live processing.
• Rotary encoder
A device used to convert the angular position of a shaft or axle to an analog or
digital code.
•Saturate
To replace overflows (or underflows) in an operation with the highest (or lowest)
possible value that can be held in the destination buffer of the operation.
• Timer output
The signal generated by one of the programmable timers of a frame grabber, which
can be used to control external hardware. For example, it can be fed to the video
source to control its exposure time or used to fire a strobe light.
• UART
Universal Asynchronous Receiver/Transmitter. A component that handles
asynchronous communication through a serial interface (for example, RS-232 or
LVDS).
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