US Patent 7548275 Method for interpolating a video signal

A right side interpolation component and a left side interpolation component for each present pixel are calculated. The right side interpolation component of a present pixel on the left side of an assumption pixel to be interpolated is added to the left side interpolation component of another present pixel on the right side of the assumption pixel, thereby obtaining a pixel data for the assumption pixel. The right side interpolation component and the left side interpolation component are calculated based on a pixel data of a central present pixel and pixel data of present pixels around the central present pixel.