Dolby Digital 5.1 - Also known as AC-3, it provides 6 channels of sound: left, center, right, left rear, right rear, and sub-woofer. It is also called "5.1 channels" since the 6th channel has reduced bandwidth. Dolby Digital 5.1 is the audio standard for all U.S. digital TV stations, most DVDs, some DBS programs, and many theaters.
Over-the-air Broadcast (OTA) - Also called Terrestrial Broadcast. The delivery of TV and radio signals, using UHF/VHF frequencies, directly to consumer devices. Broadcasts may be either analog or digital.
SPDIF - (Sony/Philips Digital Interface) - This is digital audio, and can be either coaxial cable or fiber optic.
Downconvert - The process which reduces the number of pixels in the scanning format used to represent an image, so that it may be reproduced on a display of lower resolution, such as a conventional television. For example, an HDTV image may be downconverted to an SDTV or NTSC image, but in the conversion significant detail information may be lost.
LCD - (Liquid Crystal Display) - A common display technology. LCD is likely to replace CRTs in the smallest HDTV's.
ATSC - (Advanced Television System Committee technical standard) - This is the name of the technology used by terrestrial digital TV stations in the U.S.
COFDM modulation technique. This technical standard has been used in Europe and other places for digital TV. 8VSB is used in the U.S.
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