OAR - (original aspect ratio) - Also called Letterbox format, OAR means that none of the image is clipped or squeezed. Unused parts of the screen are usually black.
BNC connectors. These common RF connectors are sometimes found on VGA cables in place of a VGA connector. They employ a quarter-turn twist-lock mechanism.
Datacasting - The inclusion of additional data in the broadcasting stream. Such data may be related to the current program (e.g. sports statistics) or may be completely independent (e.g. software downloading or traffic advisories).
Interlaced Scanning - Some HD televisions and most conventional televisions use the "interlace" method of scanning, in which the picture is transmitted and painted on the screen in two passes. In the first pass, every other line is painted and in the second, the lines in between. Some display types, such as LCD, plasma and DLP cannot display directly images transmitted as interlaced signals and must convert them to a progressive format prior to their display.
VGA - a 5-wire standard interface, originally for computer monitors, now common for HDTV monitors. Usually the 5 wires are in one cable. The connector can be either a 15-pin connector or five BNC connectors. The signals are usually red, green, blue, horizontal sync, and vertical sync. But Y, Pr, and Pb can replace the colors.
Toslink - A fiber optic cable standard.
Widescreen - see 16 - 9
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