Samsung hl r5078w 50 1080p DLP HDTV

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HDTV stands for high-definition television. HDTV is experiencing growing pains, it has become increasingly popular since it's introduction.

HDTV Facts:

"Aspect ratio" refers to the ratio of the vertical to horizontal measurements of a television's picture. Mechanically scanned television as first demonstrated by John Logie Baird in 1926 used a 7:3 vertical aspect ratio, oriented for the head and shoulders of a single person in close-up.

Most of the early electronic TV systems from the mid-1930s onward shared the same aspect ratio of 4:3 which was chosen to match the Academy Ratio used in cinema films at the time. This ratio was also square enough to be conveniently viewed on round cathode-ray tubes (CRTs), which were all that could be produced given the manufacturing technology of the time. (Today's CRT technology allows the manufacture of much wider tubes, and the flat screen technologies which are becoming steadily more popular have no aspect ratio limitations at all.) The BBC's television service used a more squarish 5:4 ratio from 1936 to 3 April 1950, when it too switched to a 4:3 ratio.

The UK's first HDTV service began on 2 December 2005 when Telewest, a cable TV company now part of NTL, distributed HDTV programs to 400 customers in the south London area.

On 10 March 2006 NTL confirmed that HDTV was available nationally in the former Telewest areas. Sky High-Definition has been confirmed to be available to the general public from 1 May 2006.

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