Patent ID: 7050077

Claim:
A resolution conversion device comprising: a plurality of line buffers for sequentially storing pixel values of first image data for respective lines in synchronism with pixel clocks and a horizontal sync signal; a generation unit configured to sequentially generate a coordinate value used to specify a pixel position in second image data on the basis of a count value of predetermined clocks and the horizontal sync signal; a conversion unit configured to convert the coordinate value generated by said generation unit into a pixel position in the first image data on the basis of a scale value of resolution conversion; an arithmetic unit configured to acquire pixel values of pixels required for an arithmetic operation from said plurality of line buffers on the basis of the pixel position obtained by said conversion unit, and calculating a pixel value of a pixel corresponding to the coordinate value; and a stop unit configured to, when said arithmetic unit is not ready to execute the arithmetic operation of a pixel value, stop generation of the coordinate value by said generation unit until said arithmetic unit is ready to execute the arithmetic operation.