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  2. 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 ...

  3. Optimum HDTV viewing distance - Wikipedia

    en.wikipedia.org/wiki/Optimum_HDTV_viewing_distance

    This table can be used in a number of ways : Find the optimal distance for a given screen. Example: for a 4K UHD screen 140 cm high (112 inches diagonal), the optimal distance is 140 × 1.6 = 224 cm. Find the right screen size. Example: for a 1080 HDTV used at a distance of 250 cm, you need to find a screen whose height is close to ⁠ 250. /.

  4. List of 4K video recording devices - Wikipedia

    en.wikipedia.org/wiki/List_of_4K_video_recording...

    Panasonic DVX-200 – 4k 60fps. Point Grey FL3-U3-88S2C-C 8.8 MP Color USB 3.0 – released in 2012 and records at DCI 4K (the framerate is limited to 21 fps) [ 7] RED EPIC – released in 2011 and records at 5K RAW (5120×2700 13.8 megapixels) & DCI 4K (4096×2160, 8.8 megapixels) RED Scarlet-X – released in November 2011.

  5. Rec. 2020 - Wikipedia

    en.wikipedia.org/wiki/Rec._2020

    ITU-R Recommendation BT.2020, more commonly known by the abbreviations Rec. 2020 or BT.2020, defines various aspects of ultra-high-definition television (UHDTV) with standard dynamic range (SDR) and wide color gamut (WCG), including picture resolutions, frame rates with progressive scan, bit depths, color primaries, RGB and luma-chroma color representations, chroma subsamplings, and an opto ...

  6. 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. HDTV has quickly become the ...

  7. 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).

  8. CinemaScope - Wikipedia

    en.wikipedia.org/wiki/CinemaScope

    CinemaScope logo from The High and the Mighty (1954) CinemaScope is an anamorphic lens series used, from 1953 to 1967, and less often later, for shooting widescreen films that, crucially, could be screened in theatres using existing equipment, albeit with a lens adapter. Its creation in 1953 by Spyros P. Skouras, [ 1] the president of 20th ...

  9. Glasses - Wikipedia

    en.wikipedia.org/wiki/Glasses

    Glasses. Glasses, also known as eyeglasses and spectacles, are vision eyewear with clear or tinted lenses mounted in a frame that holds them in front of a person's eyes, typically utilizing a bridge over the nose and hinged arms, known as temples or temple pieces, that rest over the ears. Glasses are typically used for vision correction, such ...

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