Patent ID: 8125566

Claim:
A sequential scanning conversion device comprising: a motion detector configured to detect motion in one frame for each pixel; a still-image interpolating pixel producing module configured to produce interpolating pixels for still images using either of the preceding and succeeding field signals; a moving-image interpolating pixel producing module configured to produce interpolating pixels for moving images using any one of the current, preceding and succeeding field signals; an interpolating pixel mixture producing module configured to mix the still-image interpolating pixels and the moving-image interpolating pixels while increasing the percentage of the still-image interpolating pixels as the result of detection by the motion detector is shifted to the still-image determination side and increasing the percentage of the moving-image interpolating pixels as the result of detection by the motion detector is shifted to the moving-image determination side; an interfield zero vector correlation detector configured to detect correlation between corresponding small regions at the same screen location in the current and preceding field signals or the current and succeeding field signals, the small regions being obtained by dividing the entire screen; a picture-based illumination component variation detector configured to detect illumination component variations between fields on a picture-by-picture basis using any one of the current, preceding and succeeding field signals; a block-based illumination component variation detector configured to detect illumination component variations between fields on a small-region-by-small-region basis using any one of the current, preceding and succeeding field signals; and a motion detection correction module configured to correct the result of detection by the motion detector on the basis of the result of detection by the interfield zero vector correlation detector and correct the result of detection by the motion detector on a small-region-by-small-region basis on the basis of the results of detection by the picture- and block-based illumination component variation detector.