Patent ID: 6498626
Filing Date: 2002-12-24
Classification: H04N

Abstract:
A video display deflection apparatus, comprising:means for producing a deflection field that varies a position of an electron beam on a screen of a cathode ray tube to form horizontal lines of a raster: a source of a video signal for displaying picture information contained in said video signal in said horizontal lines, said video signal providing, selectively, a first type of visual content and a second type of visual content, such that, when each of said types of visual content is provided, horizontal scanning occurs at a first horizontal deflection frequency; a source of a first control signal having a first value, when said video signal provides said first type of visual content and a second value, when said video signal provides said second type of visual content; and a filter responsive to said first control signal for selectively establishing by an operation of a switch a first frequency response characteristic, when said first control signal has said first value, and a second frequency response characteristic of said filter, when said first control signal has said second value, said filter being responsive to said video signal for generating from said video signal a filtered, correction signal having a frequency spectrum that varies in accordance with said first control signal, said correction signal being coupled to said deflection field producing means for varying, in accordance therewith, said deflection field.