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2. High-definition television - Wikipedia

   en.wikipedia.org/wiki/High-definition_television

   High-definition television (HDTV) describes a television or video system which provides a substantially higher image resolution than the previous generation of technologies. The term has been used since at least 1933; [ 1 ] in more recent times, it refers to the generation following standard-definition television (SDTV).

3. High-definition television in the United States - Wikipedia

   en.wikipedia.org/wiki/High-definition_television...

   High-definition television (HDTV) in the United States was introduced in 1998 and has since become increasingly popular and dominant in the television market. Hundreds of HD channels are available in millions of homes and businesses both terrestrially and via subscription services such as satellite , cable and IPTV .

4. Digital television in the United States - Wikipedia

   en.wikipedia.org/wiki/Digital_television_in_the...

   High definition—1080p (only used by a few cable operators and some terrestrial stations broadcast in 1080p) Most digital television sets sold in the U.S. use a display with a 16:9 aspect ratio to optimally display HDTV-formatted content. Lower-resolution sources like regular DVDs may be upscaled to the native resolution of the TV.

5. Digital television - Wikipedia

   en.wikipedia.org/wiki/Digital_television

   Digital television (DTV) is the transmission of television signals using digital encoding, in contrast to the earlier analog television technology which used analog signals. At the time of its development it was considered an innovative advancement and represented the first significant evolution in television technology since color television ...

6. Ultra-high-definition television - Wikipedia

   en.wikipedia.org/wiki/Ultra-high-definition...

   Ultra-high-definition television (also known as Ultra HD television, Ultra HD, UHDTV, UHD and Super Hi-Vision) today includes 4K UHD and 8K UHD, which are two digital video formats with an aspect ratio of 16:9. These were first proposed by NHK Science & Technology Research Laboratories and later defined and approved by the International ...

7. Digital television transition in the United States - Wikipedia

   en.wikipedia.org/wiki/Digital_television...

   12 June 2009 - final hours of analog broadcast on WWL-TV gave information about websites and telephone numbers for more information about transition. The digital transition in the United States was the switchover from analog to exclusively digital broadcasting of terrestrial television programming.