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What is the difference between Digital Television (DTV) and High Definition Television (HDTV)?

April 26, 2017digital DTV hdtv high definition television

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What is the difference between Digital Television (DTV) and High Definition Television (HDTV)?

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DTV is the umbrella term used to describe the digital television system adopted by the FCC in December 1996. HDTV is a type of DTV service. HDTV provides high resolution programming in a widescreen format. A current analog TV picture can provide resolution of up to 480 horizontal lines. An HDTV picture can provide resolution of up to 1080 lines, providing improved picture detail. Aspect ratio is a comparison of screen width to screen height. Analog TV has an aspect ratio of 4 by 3, which means the screen is 4 inches wide for every 3 inches high. Widescreen HDTV format has an aspect ratio of 16 by 9. HDTV programs include Dolby digital surround sound, similar to the sound used in movie theaters and on DVDs.