Patent ID: 7446815

Claim:
A picture conversion apparatus that converts an inputted interlaced video signal into a progressive video signal, comprising: an interpolation circuit that generates interpolated pixels between lines on the basis of said inputted interlaced video signal; a motion calculation circuit that calculates motion amount information in a vertical direction of a picture on a basis of said interpolation signal outputted from said interpolation circuit; a still picture processing circuit that generates a still picture progressive signal by still picture processing from said inputted interlaced video signal; a moving picture processing circuit that generates a moving picture progressive signal by moving picture processing from said inputted interlaced video signal; and an output circuit that outputs the still picture progressive signal outputted from said still picture processing circuit as said progressive video signal when said motion amount calculated by said motion calculation circuit is smaller than a first value, said interpolation circuit comprising: an interlace generation circuit that generates a plurality of interlaced video signals respectively corresponding to a plurality of successive fields on the basis of said inputted interlaced video signal; a first progressive generation circuit that generates a first progressive field signal on the basis of the plurality of interlaced video signals generated by said interlace generation circuit; a second progressive generation circuit that generates a second progressive field signal on the basis of the plurality of interlaced video signals generated by said interlace generation circuit; and an output circuit that outputs a progressive signal by changing, for each pixel, the ratio of an inter-frame interpolation signal to an intra-field interpolation signal, based on the motion amount information.