U, V
UNDERSCAN
UNIVERSAL VIDEO
UP-LINK
USB
UTP
UXGA
U, V
Color difference signals for PAL chrominance scaling. They represent a formula related to B-Y and R-Y levels.
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UNDERSCAN
The opposite of Overscan. A video or computer image is shrunk on the screen, leaving black borders around it. Underscan is used to scale large images to the screen size and to show on the screen what is happening in the blanking period - at the beginning and end of the lines and the frames. By underscanning, some latent problems in the image can be seen and identified for correction.
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UNIVERSAL VIDEO
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UP-LINK
The transmission of a signal to a satellite, or the primary link in a microwave system.
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USB
Universal Serial Bus. An advanced PC I/O system, much faster than the legacy serial and parallel connections. The system allows for Plug and Play operation, connecting up to 127 external devices via an appropriate hub to the PC. The newer system, USB 2.0, allows up to 480 Mbps communication speed.
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UTP
Unshielded Twisted Pair. A twisted pair system for signal transmission, using unshielded pairs of wires. Data, video, audio and other signals may be transmitted over long distances using a twisted pair transmitter-receiver system. When blocking of adjacent interference is required, an STP system is used.
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UXGA
Ultra eXtended Graphics Array. A graphics format with a 1600X1200 pixels resolution.
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