Everything you need to know about HDTV
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Posted On :
Nov-30-2011
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Article Word Count :
408
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HDTV stands for High Definition Television, which is a type of television set that can display images of a higher quality and higher resolution than standard television sets.
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HDTV stands for High Definition Television, which is a type of television set that can display images of a higher quality and higher resolution than standard television sets. TV broadcasts in the UK are produced using 768 vertical lines and 546 horizontal lines of pixels, giving you a grand total of 419,328 pixels displayed per frame. HDTV broadcasts can offer far higher resolutions, ranging from 1280 x 720, to 1920 x 1080.
With older TVs, it was virtually impossible to see these pixels, due to small screen size and the slight blurriness of analogue images. Nowadays, with HDTV and digital displays, todays crystal clear TVs reveal low resolution, making them appear patchy and blocky, an effect that is even more noticable when it comes to televisions with larger screen sizes. Increase the resolution of a TV screen and the more detail it can contain, getting rid of the blocky appearance.
On modern HD televisions, pixels are so tiny that the person watching is never aware of them, creating a crystal clear and highly detailed image.High Definition TV is a term that dates back to the 1930s, when it described broadcasts in the region of 400 lines, a giant leap in resolution over the early systems which often broadcast as few as 30 lines. France began broadcasting 819 lines in the 1940s, which ranks alongside todays HDTV standards, albeit these French HD broadcasts were not available in colour, only monochrome.
The first ever High Definition colour broadcasts, known as MUSE became available in 1979 via the Japanese state broadcaster. It was not available for public use until almost 20 years later, and it failed to take off for a variety of reasons. The biggest obstacle to its success was that HD broadcasts contained so much more information than conventional broadcasts, and used up a significantly higher amount of bandwidth when bandwidth was at a premium.
The bandwidth issue was overcome by digital television, which use a lot less bandwidth than broadcasts being made in the analogue format. HDTV has been available since the 1990s, but, consumers had to wait until the 21st century for HDTVs to become widely available and relatively affordable, which made it viable for broadcasters to start offering HD programming. Today, viewers with High Definition TV sets can enjoy HD images via terrestrial, satellite, and cable broadcasting, over the net, and with HD computer games.
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Article Source :
http://www.articleseen.com/Article_Everything you need to know about HDTV_112473.aspx
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Author Resource :
This article about HD Television by Connor Josephson. For a great deal on your next flat screen TV visit Dixons.co.uk.
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Keywords :
TVs, 3d tvs, led tvs, lcd tvs, plasma tvs, flat screen tvs, televisions, 3d televisions, lcd televisions, led televisions,
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