YPrPb - Color representation requires three independent variables. CRTs - prefer red, green, and blue. Ink jet printers prefer yellow, magenta, and cyan. NTSC encodes color as luminance (brightness), hue (color), and saturation (absence of white in colors). Storage media such as DVDs prefer Y, Pr, and Pb, where Y is luminance, Pr is Y-red, and Pb is Y-blue. This is because Pr and Pb can be at lower resolution and not degrade the image noticeably, thus saving storage space.
FTA - (Free To All MPEG-2 broadcasts) - The two most common digital schemes found on C-band and Ku band are 4DTV and FTA. FTA receivers are available to consumers, but there is effectively no regular HD programming.
DLP - (digital light processor). A technology for video projection, also call DMD (Digital Micro-mirror Device). It is a large chip with about a million tiny mirrors on its surface. The chip can tilt each mirror to vary the amount of light reflected off of it.
DTV - (digital TV). Examples of DTV are DBS satellite services, digital cable TV services, and ATSC digital TV stations.
Pixels Per Inch - Pixels per inch (PPI) is a measure of the sharpness (that is, the density of illuminated points) on a television display screen.
Must-carry - This refers to the legal obligation of cable companies to carry analog or digital signals of over-the-air local broadcasters.
VGA - This acronym is short for the "Video Graphics Array" display mode. VGA resolution is 640 x 480 pixels.
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