HD stands for high definition. HDTV is a new set of standards for television broadcasting. It's broadcast at higher resolution, which provides better image and sound clarity than traditional television. HDTV broadcasts are also in widescreen format (16:9 aspect ratio) vs. traditional television format (4:3 aspect ratio). To take full advantage of HD television broadcasts you'll need either an HDTV or an HD-ready TV set (plus a set-top receiver/decoder). Check with your local cable or satellite provider to find out what HDTV programming is available to you.HDTV Sets are an all-in-one package, fully equipped and ready to receive and display high definition digital television. Just plug and play.
HDTV resolution or picture detail, is the main reason why HDTV programs look so good. The standard-definition programming most of us watch today has at most 480 visible lines of detail, whereas HDTV has as many as 1,080. HDTV looks sharper and clearer than regular TV by a wide margin, especially on big-screen televisions. It actually comes in two different resolutions, called 1080i and 720p. One is not necessarily better than the other; 1080i has more lines and pixels, but 720p is a progressive-scan format that should deliver a smoother image that stays sharper during motion. Another format is also becoming better known: 1080p, which combines the superior resolution of 1080i with the progressive-scan smoothness of 720p. True 1080p content is scarce outside of Blu-ray, HD DVD and the latest video games.
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