- From Wikipedia, the free encyclopedia High-definition television (HD) describes a television system providing an image resolution of substantially higher resolution than the previous generation of technologies.
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High-definition television 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, but in modern times refers to the generation following standard-definition television, often abbreviated to HDTV or HD-TV. It is the current standard video format used in most broadcasts: terrestrial broadcast television, cable television, satellite television, Blu-ray Discs, and the only differe
High Definition TV (HDTV) uses digital signals and the 16:9 aspect ratio standard. This is different to SDTV (Standard Definition TV) that uses analog signals and the 4:3 aspect ratio standard. HDTV picture resolution is at least twice that of SDTV, so it can present a more vivid screen than analog.
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.
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).
Two resolutions are defined as UHDTV: UHDTV-1 is 3840 pixels wide by 2160 pixels tall (8.3 megapixels ), which is four times as many pixels as the 1920 × 1080 (2.07 megapixels) of current 1080p HDTV (full HDTV). Also known as 2160p, and 4K UHD.
From Wikipedia, the free encyclopedia High-definition television (HDTV) is a television system providing an image resolution that is of substantially higher resolution than that of standard-definition television. This can be either analog or digital.
- Technical details
- HD content
High-definition video is video of higher resolution and quality than standard-definition. While there is no standardized meaning for high-definition, generally any video image with considerably more than 480 vertical scan lines or 576 vertical lines is considered high-definition. 480 scan lines is generally the minimum even though the majority of systems greatly exceed that. Images of standard resolution captured at rates faster than normal, by a high-speed camera may be considered high-definiti
The first electronic scanning format, 405 lines, was the first "high definition" television system, since the mechanical systems it replaced had far fewer. From 1939, Europe and the US tried 605 and 441 lines until, in 1941, the FCC mandated 525 for the US. In wartime France, René Barthélemy tested higher resolutions, up to 1,042. In late 1949, official French transmissions finally began with 819. In 1984, however, this standard was abandoned for 625-line color on the TF1 network.
High definition video is defined threefold, by: 1. The number of lines in the vertical display resolution. High-definition television resolution is 1,080 or 720 lines. In contrast, regular digital television is 480 lines or 576 lines. However, since HD is broadcast digitally, its introduction sometimes coincides with the introduction of DTV. Additionally, current DVD quality is not high-definition, although the high-definition disc systems Blu-ray Disc and the HD DVD are. 2. The scanning system:
High-definition image sources include terrestrial broadcast, direct broadcast satellite, digital cable, high definition disc, digital cameras, Internet downloads, and video game consoles. 1. Most computers are capable of HD or higher resolutions over VGA, DVI, HDMI and/or DisplayPort. 2. The optical disc standard Blu-ray Disc can provide enough digital storage to store hours of HD video content. Digital Versatile Discs or DVDs, are not always up to the challenge of today's high-definition sets.
High Definition Television [ haɪ ˌdɛfɪˈnɪʃən ˈtɛlɪvɪʒən] (HDTV, engl. für hochauflösendes Fernsehen) ist ein Sammelbegriff, der eine Reihe von Fernsehnormen bezeichnet, die sich gegenüber dem Standard Definition Television (SDTV) durch eine erhöhte vertikale, horizontale oder temporale Auflösung auszeichnen.
Another development was the move from standard-definition television (SDTV) (576i, with 576 interlaced lines of resolution and 480i) to high-definition television (HDTV), which provides a resolution that is substantially higher. HDTV may be transmitted in various formats: 1080p, 1080i and 720p.
Ultra High Definition Television (UHDTV oder Ultra HDTV) und Ultra High Definition Video (UHDV) bezeichnen ein digitales Videoformat, welches zwei Bildauflösungen (gleiche Zeilenzahl wie 4K und 8K, jedoch im Bildseitenverhältnis 16:9) umfasst.