Image distortion correction method and apparatus

Details Image distortion correction method and apparatus Image distortion correction method and apparatus

H - Electricity

04

N

375/46, 355/9

H04N 3/22 (2006.01) H04N 3/233 (2006.01)

Patent

CA 1231188

-22- Abstract of the Disclosure An image distortion correction method and appar- atus is disclosed. An electron beam generated in a Cathode-Ray-Tube (CRT) sweeps horizontally. Simultan- eously therewith, the intensity thereof varies in ac- cordance with an incoming video signal representative of video information. As a result thereof, the video information is transferred to a display of the CRT. Various types of video image distortion appears on the CRT. To compensate for this distortion, the rate at which the video information is transferred to the dis- play of the CRT is varied in accordance with the posi- tion of the electron beam during the sweep thereof. Since the video image distortion is a function of the position of the electron beam during the sweep there- of, in accordance with this invention, said rate at which the video information is transferred to the dis- play of the CRT is varied in accordance with the par- ticular distortion being compensated therefor.

441687

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