Glossary

NI Video Measurement Suite Help

Edition Date: October 2012

Part Number: 373389B-01

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C

composite video signalthe analog video waveform that conveys the image data in a conventional PAL or NTSC television signal. It is also called CVBS (color, video, blanking, and sync) video. Composite color video signals are comprised of three components: the luminance (luma), Y, signal which contains the intensity information (brightness); the chrominance (chroma), C, signal which contains the color information (hue and saturation); and the synchronization (sync), S, signal which controls the horizontal line frequency.
component video signalcomponent analog video (or CAV) refers to analog video signals comprised of three separate channels, each carrying a different color component. CAV is the video type used by SDTV, HDTV, and computer graphics, and provides the highest quality transmission of analog video possible, typically used for video production and high-end viewing.
CAV video signalSee component video.
CVBS video signalSee composite video.

D

deep color videoA video signal with a color depth of more than 8 bits per color channel.
digital video signaldigital video is for all practical purposes synonymous with digitized component video. Digital video refers to digital video signals comprised of three separate channels, each carrying a different color component.
DSDdirect stream digital
DVdigital video
DVIdigital visual interface

H

HDhigh definition
HDCPhigh-bandwidth digital content protection
HDMIhigh-definition multimedia interface
horizontal locationlocation (of a test signal or test element) on a video line

I

I/Oinput/output
I2Sintegrated interchip sound
IYUVraw YUV

J

JPEGJoint Photographic Experts Group

N

NI-HSDIONI High-Speed Digital I/O driver
NI PQANI Picture Quality Analysis

O

offline modein this mode NI VMS loads signals into the video buffer by reading from a video binary file or from a simulated device.
online modein this mode NI VMS loads signals into the video buffer by acquiring from hardware or a simulated device.

S

S/PDIFSony/Philips Digital Interconnect Format

T

test elementA building block of a test signal. For example, a color bar signal contains bars elements, and a multiburst contains burst and flag elements. Notice that some NI VMS measurements do not require you to specify locations for an entire test signal, but only for test elements within the test signal. For this reason, NI VMS allows you to define locations not only for whole test signals, but also for certain individual test elements in the Measurement Locations Editor, such as a pulse signal. It is also for this reason that the terms "test signal" and "test element" are used somewhat interchangeably in this help file.
test matrixA single video frame in which all necessary test elements are contained, so that you can output the frame continuously from the video source. The active picture lines in each field or frame are divided into bands, with each band consisting of identical test lines. A different matrix pattern is required for each different video standard being tested. If you automate testing using NI VMS in TestStand, the order in which you measure test signals in a test matrix can be important (for example, if you perform a bar line test you should do so in the first step in a TestStand sequence).
test patternalso called a "test card." Historically referred to physical cards containing visual patterns used for calibration, alignment, and troubleshooting in television broadcasting, such as color bars, multibursts,sweeps, and pulses. A test pattern refers to a frame of video that may contain one or more different types of test signals on different lines. Each test line may itself contain several test elements used to produce the different types of measurements.
test signalA test signal is synonymous with a test pattern.

V

VGA video signalVGA (video graphics array) refer to an analog computer display standard. No synchronization is present in the signal itself. The synchronization is handled by a separate horizontal sync, H-Sync, and vertical sync , V-sync, signals
vertical locationthe location (of a test signal or test element) on the video frame, measured in video lines numbered from the top to the bottom of the screen
NI VMS Analyzer Setup panelan interface available in NI TestStand that mimics the appearance and function of the standalone version of NI VMS, with additional controls related to sequencing and filtering the video buffer.
NI VMS measurementa measurement of an industry-standard video test signal and/or the element(s) it contains, such as color bar; a measurement of an industry-standard component of a video signal that is not a test signal.
NI VMS testan NI VMS measurement to which you assign pass/fail limits (you can assign limits in NI VMS in TestStand but not in the standalone version of NI VMS)

Y

YUVluminance-bandwidth-chrominance

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