Aspect Ratio - A numerical expression of the relationship of width to height of a TV screen. 4:3 - This numerical sequence refers to the aspect ratio of the National Television Systems Committee (NTSC) TV screen, with "4" unit width corresponding to "3" unit height, proportionally, regardless of the actual size of the screen. 16:9 - This numerical sequence refers to the aspect ratio of wide screen DTV formats for all HDTV and some SDTV (Standard Definition) video. A "16" unit width corresponds to "9" unit height proportionally, regardless of the actual size of the screen. The widescreen 16:9 numerical sequence provides a viewing experience very similar to that of 35 mm movies.
Dish Network - (see DBS)
Composite video. This 1-wire standard contains all video information: intensity, color, and sync. The encoding is the same as NTSC, and thus has the "overlapping sideband" problem which sometimes causes wrong colors to appear.
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).
Progressive scan - This is the opposite of interlaced scan.
Channel - A 6 MHz (bandwidth) section of spectrum for over-the-air broadcast (channels 2 - 69) or in TV cable that carries one analog NTSC program or one or more DTV programs.
Pixel - Pixel is actually two words jammed together _ picture and element. A pixel is a tiny sample of video information, the "little squares" that make up an overall picture.
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