Patent ID: 6433836
Filing Date: 2002-08-13
Classification: H04N

Abstract:
A contour emphasizing circuit comprising an A/D conversion circuit for converting input analog R, G and B video signals to output R, G and B digital video signals, a signal processing circuit for producing processed digital video signals from the digital video signals, a Y signal generation circuit for generating a Y signal from an output signal of the signal processing circuit, a contour extracting circuit for extracting contour components from the Y signal, a gain controller for receiving the extracted contour components, multiplying the extracted contour components by an adjustable coefficient and outputting adjusted contour components, a coefficient multiplication circuit for receiving the adjusted contour components, multiplying by coefficients Kr, Kg and Kb, Kr, Kg and Kb being less than one, and outputting contour components for the processed R, G and B digital video signals and contour adders for adding the contour components for the processed R, G and B digital video signals to the processed R, G and B digital video signals, respectively.