High Definition Video
HDTV or high definition television normally refers
to any video system of higher resolution than the
standard definition. The original HD specifications
date back to the early 1980s, when Japan first
experimented with a 1025 line television standard.
Japan presented their parameters at an international
meeting of television engineers in Algiers in 1981
and Japan's NHK presented their analog HDTV system
at a Swiss conference in 1983. Except for these
early formats, HDTV is digital broadcast and
therefore it's introduction will sometimes conincide
with the introduction of DTV, or digital television.
The signals for high definition require a high
definition television or a computer monitor in order
to be watched or viewed. High definition video
will normally have an aspect ratio of 16:9. The
aspect ratio of the regular widescreen film that is
shot today is normally 1:85:1 or 2:40:1. The
standard type of television has a 4:3 aspect ratio.
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