National Instruments NI Vision PCI-1409, User Manual, Page: 28 / 40

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Glossary
A
A Amperes.
A/D Analog-to-digital.
AC Alternating current.
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 (VSYNC)) 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 (HSYNC)) and a pixel count.
ADC Analog-to-digital converter. An electronic device, often an integrated
circuit, that converts an analog voltage to a digital value.
address Value that identifies a specific location (or series of locations) in memory.
ANSI American National Standards Institute.
antichrominance filter Removes the color information from the video signal.
API Application programming interface.
area A rectangular portion of an acquisition window or frame that is controlled
and defined by software.
array Ordered, indexed set of data elements of the same type.
ASIC Application-Specific Integrated Circuit. A proprietary semiconductor
component designed and manufactured to perform a set of specific
functions for specific customer needs.
aspect ratio The ratio of a picture or image’s width to its height.