Patent ID: 6377307
Filing Date: 2002-04-23
Classification: H04N

Abstract:
A line interpolation apparatus for converting a video signal for interlaced scanning into a video signal for progressive scanning, the line interpolation apparatus comprising:lower interpolation element generation means for employing an upper real scan signal, along a real scan line that is above and adjacent to an interpolated scan line, and real scan signals, along a plurality of sequential real scan lines that are vertical relative to the upper real scan line, to generate a lower interpolation element for the upper real scan signal; upper interpolation element generation means for employing a lower real scan signal, along a lower real scan line that is below and adjacent to the interpolated scan line, and real scan signals, along a plurality of sequential real scan lines that are vertical to the lower real scan line, to generate an upper interpolation element for the lower real scan signal; inclination detection means for detecting inclination information for an image based on two or more real scan signals, including the upper and the lower real scan signals; limitation means for adjusting levels of the upper interpolation element and the lower interpolation element in accordance with the inclination information detected by the inclination detection means, and for generating a first interpolation element and a second interpolation element whose levels are adjusted; and addition means for adding the first and the second interpolation elements to generate an interpolated scan signal that is to be inserted into the interpolated scan lines that are adjacent to the upper and the lower real scan lines.