What is the Difference Between Digital and HD?
Digital is the "format" that TV broadcasters will be using and HDTV is a type of TV display. The US is moving from Analog to Digital but not to HDTV from Feb 17 2009. High Definition content can be delivered on Digital Transmission, however It's not mandatory to have HDTV. Not all digital channels are hi-def but all hi-def channels are digital.
High-definition television or HDTV, is a digital television broadcasting system with a higher resolution than normal televisions. High-definition television (HDTV), usually used over DTV, uses one of two formats: 1280 by 720 pixels in progressive scan mode (abbreviated 720p) or 1920 by 1080 pixels in interlace mode (1080i). Each of these utilizes a 16:9 aspect ratio.
HDTV is digitally broadcast because digital television (DTV) requires less bandwidth. HD gives clear, sharp pictures with vivid colours and up to five times more detail than normal definition TV's. HD broadcasts are very well suited to flat screen TV's like LCD and plasma.
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