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1). HD Satellite TV -- Compare HDTV Services
HD Satellite TV
HD (high definition) refers to the quality of the picture being transmitted to your television set.
Picture quality is measured in scan lines. The more scan lines that are transmitted to your TV, the clearer the picture.
For instance, analog (over-the-air) TV has 525 scan lines per image. HDTV, on the other hand, has up to 1,080 lines per image -- almost twice as many lines of resolution giving you twice the clarity of analog TV.
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