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Remember when there was just TV. Now we've got SDTV, EDTV, HDTV, 480i, 480p, 720p, 1080i and 1080p. Enough to make you sick! And if you think you are confused now, just go talk to any electronic megastore and you will get what true confusion is all about. Let's talk basics. You want the best picture you can get for your money…that’s a gimme. Getting there is actually easier than you think. Reading the rest of this article will give you some of what you need to make an educated decision when shopping for an HDTV. There are over 250 million televisions in the United States. Video signals pump information into a TV at the rate of 30 frames per second. Each frame is a still picture that gives the appearance of continuous motion, just like a cartoon. I could go on here but lets leave it at the basics.
HDTV
High Definition Television (HDTV). HDTV does two things. First, it increases the number of scan lines on the screen. Second, it widens the aspect ratio of the screen from the standard 4:3 to 16:9. The wider screen format has a more theatrical look. HDTV format is 1080p, or 1080 lines interlaced. An alternative HDTV format is 720-lines progressive scan, or 720i. Though it has fewer lines, the native progressive scan format eliminates motion artifacts that originate in interlacing, and are still visible in large screen 1080i. The bottom line is that 1080i and 720p are both excellent HDTV formats. One is not better than the other; they are just each better with particular types of material. When done right, both HDTV signals are clearly superior to standard 480-line format we have today.
HDTV coming sooner than you think
Everyone across the country will have to make a decision on February 17, 2009:  A government mandate requires that all full-power TV stations stop broadcasting analog signals and switch to 100% digital broadcasting!! This transition will primarily affect nearly 15-20 million TV viewers who rely on local over-the-air broadcasts received via antenna. People who fall into this category will have to purchase an hdtv antenna. An hdtv antenna will permit you to receive your local HDTV stations. Hdtv antennas come in different styles and shapes and are inexpensive, usually around $40 to $50.
The good thing about an hdtv antenna compared to the old analog antenna is you will either get an HDTV picture or you wont. You will not miss ghosting and static you had to deal with on your old antenna. When you switch to an hdtv antenna you either get the digital picture or you don’t.

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