Down Converting - Process by which a high-definition signal is converted to a standard definition picture.
Y, PB, PR - A method for carrying the video between HDTV or SDTV devices that retains the maximum quality and is recommended for HD television. The video is carried on three cables, respectively carrying luminance (Y) and the two color difference signals (PB, PR).
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.
Analog TV - Analog technology has been in use for the past 50 years to transmit conventional TV signals to consumers. "Standard" television broadcasts in analog TV. Analog signals vary continuously, creating fluctuations in color and brightness.
DTV - "Digital television." This comprises all the components of digital television, including HDTV, SDTV, datacasting, and multicasting, falling under the standards established by the ATSC.
OTA - (over the air) - There are about 1500 OTA (terrestrial) TV stations in the U.S.
S-video - Also called Y/C, this two-wire standard keeps the color separate from the intensity signal, and thus avoids the overlapping sideband problem of composite signals. (Converting an NTSC signal to S-video gains you nothing since what was lost cannot be recreated.) - Although the quality of S-video is close to component video, S-video cannot transport anything better than 480i.
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