HDTV
HDTV High Definition Television. Offers resolutions of 720 or 1080 lines compared to the 480 or 576 visible lines of analogue or Standard Definition Television (SDTV). Three HDTV formats are currently on the market - 720p, 1080i and 1080p. 720p has a resolution of 1280 lines by 720 vertical lines and 1090i and 1080p of 1920 by 1080. 720p displays each frame in full (progressively), while 1080i, displays each frame as one of two interlaced fields. Most High Definition screens will scale whatever source they are fed to fit the screen but will look their best when fed a source at their native resolution. In parallel to the introduction of HDTV, two new High Definition DVD formats have been introduced, HD-DVD and Blu-ray (now the dominant format). Microsoft’s Xbox 360 gaming console is HD compatible with an optional HD DVD drive. Sony's PlayStation 3 comes equipped with a Blu-ray drive as standard. HD camcorders are also becoming available.
Source: http://www.astintrew.co.uk/support/The%20Astin%20Trew%20Dictionary%20of%20Hi-Fi%20Terms%202008.pdf
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