Patent ID: 7532774
Filing Date: 2009-05-12
Classification: G06T,G09G

Abstract:
1. An interpolation pixel generation circuit comprising: a first calculation means for calculating a correlation value of each pair of pixels in M pairs (M is an integer) of correlation judgment pixels, said each pair of pixels being symmetric with respect to a pixel to be interpolated, one pixel of said each pair being from a video signal on a previous scanning line, and the other pixel of said each pair being from a video signal on a current scanning line; a second calculation means for calculating a correlation value of each pair of pixels in N pairs (N<M, N is an integer) of correlation judgment pixels, said each pair of pixels being symmetric with respect to the pixel to be interpolated, one pixel of said each pair being from the video signal on the previous scanning line, and the other pixel of said each pair being from the video signal on the current scanning line; a first judgment means for judging a correlation direction based on the pair of pixels having a high correlation among the correlation values calculated in the first calculation means; a second judgment means for judging a correlation direction based on the pair of pixels having a high correlation among the correlation values calculated in the second calculation means; an interpolation priority direction determination means for determining an interpolation priority direction among a slant priority direction, a vertical priority direction, and a vertical top priority direction based on said both judgments by the first judgment means and the second judgment means; and an interpolation pixel generation means for generating an interpolation pixel having a pixel value which is an average pixel value of a pair of pixels selected for interpolation from the M pairs of correlation judgment pixels and the N pairs of correlation judgment pixels based on the determination of the interpolation priority direction determination means.