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National Instruments Corporation
G-1
Glossary
A
acquisition window
The image size specific to a video standard or camera resolution.
active line region
The region of lines actively being stored. Defined by a line start (relative to
the vertical synchronization signal) and a line count.
active pixel region
The region of pixels actively being stored. Defined by a pixel start (relative
to the horizontal synchronization signal) and a pixel count.
address
Value that identifies a specific location (or series of locations) in memory.
API
Application programming interface.
area
A rectangular portion of an acquisition window or frame that is controlled
and defined by software.
ASIC
Application-Specific Integrated Circuit. A proprietary semiconductor
component designed and manufactured to perform a set of specific
functions for specific customer needs.
B
buffer
Temporary storage for acquired data.
bus
A group of conductors that interconnect individual circuitry in a computer,
such as the PCI bus; typically the expansion vehicle to which I/O or other
devices are connected.
D
DAQ
Data acquisition. (1) Collecting and measuring electrical signals from
sensors, transducers, and test probes or fixtures and inputting them to a
computer for processing. (2) Collecting and measuring the same kinds of
electrical signals with A/D or DIO devices plugged into a computer, and
possibly generating control signals with D/A and/or DIO devices in the
same computer.
