HDTV means High Definition TVs. The Digital HDTV Grand Alliance introduced this invention at the time of 1990s in the United States of America originally. This is specified as 1080 active lines, 16 x 9 aspect proportionally in ITU-R BT.709.

High defintion TV suggests display of large screen pictures with much more refinement and sharpness than seen in standard analog TV, or some another digital television formats. It is basically a Digital Television presentation format, and is believed to be the top quality DTV format available.

HDTV is attainable in direct-view, plasma, rear screen, and front screen projection. High defintion TV must have a HDTV tuner to look and the most specified HDTV format is 1080i.