SECAM - (Sequential Color And Memory standard) - This alternative to NTSC has 625 lines interlaced, 50 fields per second. It is used in the former USSR, France, and parts of Eastern Europe, the Middle East, and Africa.
Comb filter - A circuit in NTSC sets that separates the color information from the brightness information.
GLV - (Grating Light Valve) - This is another contender to replace CRTs in projection TVs.
Must-carry - This refers to the legal obligation of cable companies to carry analog or digital signals of over-the-air local broadcasters.
Virtual channel number - This is the channel the consumer thinks he is watching. The actual (physical) channel is selected by a hidden mechanism.
Resolution - A measure of the density of lines and dots per line which make up a visual image. Usually, the higher the numbers, the sharper and more detailed the picture will be. In terms of DTV, maximum resolution refers to the number of horizontal scanning lines multiplied by the total number of pixels per line.
Bit Rate - The rate at which the data is transmitted, expressed as "bits per second" (bps). The higher the bit rate, the more data that is transmitted, generally resulting in better picture or sound quality. Video data rates are usually expressed as Megabits per second (Mbps, 106) and audio data rates in kilobits per second (kbps, 103).
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