PURPOSE: To effectively suppress occurrence of flicker by minimizing the deterioration in vertical resolution in a video signal conversion circuit converting a video signal of the noninterlace system into an interlace system video signal.

CONSTITUTION: This device is provided with a level difference discrimination circuit that discriminates whether or not an absolute value of a level difference between picture elements in the horizontal direction is within a threshold level αand an absolute value of a level difference between lines is within a threshold level β in a rectangular area including processing object picture elements and a vertical direction low pass filter 9 whose characteristic is selected based on the result of discrimination of the level difference discrimination 20. The level difference discrimination circuit 20 is provided with a line memory 1, a 1-clock delay element 2, a mean value calculation circuit 3, a threshold level discrimination circuit 4 discriminating whether or not an absolute value of a level difference between input signals is within a threshold level α or over, a threshold level discrimination circuit 5 discriminating whether or not an absolute value of mean values is within a threshold level β or over, an OR gate 6, and AND circuits 7, 8.