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Dictionary of Computers - high-definition television

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high-definition television
Type of digital television system offering a significantly greater number of scanning lines, and therefore a clearer picture, than that provided by conventional systems. Typically, HDTV has about twice the horizontal and vertical resolution of current 525-line (such as the American standard, NTSC) or 625-line standards (such as the British standard, PAL); a frame rate of at least 24 Hz; and a picture aspect ratio of 9:16 instead of the current 3:4. HDTV systems are rapidly being introduced in many countries.
© From the Hutchinson Encyclopaedia.
Helicon Publishing LTD 2008.
All rights reserved.

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