National Instruments IMAQ PCI-1407 User Manual page 42

Glossary
active line region
active pixel region
ADC
address
API
area
array
ASIC
aspect ratio
B
b
B
back porch
black reference level
buffer
bus
IMAQ PCI/PXI-1407 User Manual
The region of lines actively being stored. Defined by a line start (relative to
the vertical synchronization signal) and a line count.
The region of pixels actively being stored. Defined by a pixel start (relative
to the horizontal synchronization signal) and a pixel count.
Analog-to-digital converter. An electronic device, often an integrated
circuit, that converts an analog voltage to a digital value.
Value that identifies a specific location (or series of locations) in memory.
Application programming interface.
A rectangular portion of an acquisition window or frame that is controlled
and defined by software.
Ordered, indexed set of data elements of the same type.
Application-Specific Integrated Circuit. A proprietary semiconductor
component designed and manufactured to perform a set of specific
functions for specific customer needs.
The ratio of a picture or image's width to its height.
Bit. One binary digit, either 0 or 1.
Byte. Eight related bits of data, an eight-bit binary number; also used to
denote the amount of memory required to store one byte of data
The area of the video signal between the rising edge of the horizontal
synchronization signal and the active video information.
The level that represents the darkest an image can get. See also
reference level.
Temporary storage for acquired data.
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.
G-2
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