Patent ID: 6215527
Filing Date: 2001-04-10
Classification: H04N

Abstract:
A video signal contour correcting circuit comprising:a first differential circuit for extracting the high frequency component of the video signal;a second differential circuit for differentiating the output of said first differential circuit; anda correlator to which the output of said first differential circuit, the inverted output of said first differential circuit, and the output of said second differential circuit are supplied, wherein:said correlator extracts the output of said first differential circuit of the front half of the portion before the inflection point of the video signal, the inverted output of said first differential circuit of the rear half of the portion after said inflection point, and the middle portion of the output of said second differential circuit, synthesizes said signal portions to form an contour correction signal; and the contour correction signal is overlapped to said input video signal to perform contour correction.