Patent ID: 7430021

Claim:
A video display apparatus comprising: a signal correction circuit for correcting an input video signal; and a display unit for displaying a picture on the basis of the video signal corrected by said signal correction circuit; wherein said signal correction circuit corrects the video signal by controlling levels of contour components contained in said input video signal on the basis of frequencies of occurrence of said contour components ranked in individual plural predetermined level ranges; wherein said signal correction circuit includes: a filter circuit for extracting said contour components from said input video signal; a level change circuit for changing levels of the contour components extracted by said filter circuit; an adder for adding the contour components delivered out of said level change circuit and said input video signal; a detection circuit for detecting frequencies of occurrence of said contour components extracted from said filter circuit over a predetermined period; and a control circuit for controlling said level change circuit in accordance with the results of detection by said detection circuit.