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ABC12.com: HDTV A to Z - including HDTV antennas: "HDTV is a type of digital television broadcasting. Digital signals (ones and zeros like a computer reads) provides sound and picture quality much better than traditional television.

Traditionally, analog signals were sent over the air or through cables to tell your television what to display. It generally did that in 525 tiny lines across a screen. With digital signals you can get 1080 lines, providing for a much clearer picture. HDTV also comes in a 'aspect ratio' that is wider and more rectangular - more like a movie theater (traditional TV uses a 4:3 ratio; HDTV usually uses 16:9) It usually has 10 times the resolution of traditional TV. Current sets have about 300,000 pixels, while the HDTV screen is composed of more than 2 million pixels.

Complimenting the lifelike pictures are 5.1 channels of CD-quality digital surround sound.

Strong signal always: The days of static and ghosts on your TV set are over. With a quality TV antenna and pre-amp, the signals you receive from 75 miles away will be as brilliantly clear as signals just 10 miles away.

Thanks to digital broadcasting, we can also broadcast data which will revolutionize the way you communicate, entertain yourself and live your life. we will be able to marry the convenience of television with the freedom and power of the internet. Datacasting will make truly interactive TV possible, empowering the viewer to make television viewing an incredible experience.

Compressing digital signals allow broadcasters to send up to six 'channels' compared to analogs one. So one broadcaster can send multiple programs, or other data -- perhaps information services or emergency information -- over the airwaves they are allowed to use. This is called multicasting. For example, a TV station can constantly broadcast your local weather, along with several different programs."

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