Blanking

In raster scan equipment an image is built up by scanning an electron beam from left to right across a screen to produce a visible trace of one scan line, reducing the brightness of the beam to zero ("horizontal blanking") moving it back as fast as possible to the left of the screen at a slightly lower position (the next scan line), restoring the brightness, and continuing until all the lines have been displayed and the beam is at the bottom right of the screen. Its intensity is then reduced to zero again ("vertical blanking"), and it is rapidly moved to the top left to start again, creating the next frame.

In television, in particular, the vertical blanking interval is long to accommodate the slow equipment available at the time the standard was set. Fast modern electronics allows digital information to be encoded into the signal during the vertical blanking interval; it is not displayed on screen as the beam is blanked, but can be processed by appropriate circuitry.

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Look at other dictionaries:

  • Blanking — Blanking. См. Заготовительная операция. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) …   Словарь металлургических терминов

  • Blanking —   [engl.], Austastung …   Universal-Lexikon

  • Blanking — Blank Blank, v. t. [imp. & p. p. {Blanked}; p. pr. & vb. n. {Blanking}.] [Cf. 3d {Blanch}.] 1. To make void; to annul. [Obs.] Spenser. [1913 Webster] 2. To blanch; to make blank; to damp the spirits of; to dispirit or confuse. [Obs.] [1913… …   The Collaborative International Dictionary of English

  • Blanking — This unusual and interesting name is of early medieval English origin, from the Middle English given name Blenkin or Blenkyn. The personal name is a development of the Old English Blenca , and is also found in the placename Blenkinsopp , a place… …   Surnames reference

  • blanking — temdymas statusas T sritis radioelektronika atitikmenys: angl. black out; blanking vok. Austastung, f rus. гашение, n pranc. suppression, f …   Radioelektronikos terminų žodynas

  • blanking — gesinimas statusas T sritis chemija apibrėžtis Degimo slopinimas. atitikmenys: angl. blanking; extinguishing; putting out; turning out rus. гашение; тушение …   Chemijos terminų aiškinamasis žodynas

  • blanking — noun a) An instance of something being blanked out. b) A metalworking process to form the rough shape of a sheet metal workpiece …   Wiktionary

  • Blanking — Бескрасочное [блинтовое] тиснение; Заполнение пробельных участков (в печатной форме); Биговка, просечка пазов (коробки) …   Краткий толковый словарь по полиграфии

  • blanking — Смотри Вырубка …   Энциклопедический словарь по металлургии

  • blanking — blæŋk n. empty space; empty form; empty line (to be filled in); space character adj. empty; lacking expression v. erase, make blank; block, prevent entrance …   English contemporary dictionary


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