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High-definition television Wikipedia
- High-definition television (HDTV) is a new television broadcasting system which uses a higher resolution than a normal television. With HDTV, people can watch television in higher quality than old television, giving a more vivid and clear screen. Most HDTV systems use digital signals with a 16:9 aspect ratio (width to height).
High-definition television - Simple English Wikipedia, the ...
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High-definition television (HD) describes a television system providing an image resolution of substantially higher resolution than the previous generation of technologies. The term has been used since 1936, [1] but in modern times refers to the generation following standard-definition television (SDTV), often abbreviated to HDTV or HD-TV .
From Wikipedia, the free encyclopedia High-definition television (HDTV) in the United States was introduced in 1998 and has since become increasingly popular and dominant in the television market.
NameFirst-launched HD serviceHD FormatCategorySeptember 4, 20061080iEntertainmentSeptember 16, 2001720pBroadcastOctober 15, 20071080iEntertainmentApril 1, 2011720pSports – RegionalHigh-definition television (HDTV) is a new television broadcasting system which uses a higher resolution than a normal television. With HDTV, people can watch television in higher quality than old television, giving a more vivid and clear screen. Most HDTV systems use digital signals with a 16:9 aspect ratio (width to height).
Wikimedia Commons has media related to High-definition television. This category includes broadcasters, technology and any media related to/derived from High-definition television. It is not a direct derivate of Category:Digital television, since analogue HDTV exists (see Analog high-definition television systems for instance).
Alternative terms. Ultra-high-definition television is also known as Ultra HD, UHD, UHDTV and 4K. In Japan, 8K UHDTV will be known as Super Hi-Vision since Hi-Vision was the term used in Japan for HDTV.
High-definition signals require a high-definition television or computer monitor in order to be viewed. High-definition video has an aspect ratio of 16:9 (1.78:1). The aspect ratio of regular widescreen film shot today is typically 1.85:1 or 2.39:1 (sometimes traditionally quoted at 2.35:1).
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