SIGNAL CONVERSION APPARATUS AND METHOD

摘要

A simplified Y/C separation circuit in which, a plurality of luminance signa ls are calculated for the subject pixel based on an NTSC signal of the subject pixe l and NTSC signals of pixels that are close to the subject pixel spatially or temporall y. Correlations between the plurality of luminance signals are obtained in a difference circuit and a comparison circuit. In a classification circuit, classification is performed , that is, the subject pixel is classified as belonging to a certain class, based on the correlatio ns between the plurality of luminance signals. Prediction coefficients corresponding to the class of the subject pixel are read out from a prediction coefficients memory section. Th e RGB luminance signals of the subject pixel are then determined by calculating prescribed linear first-order formulae.