Patent ID: 7738041

Claim:
A video signal processor comprising: a moving block determining module that divide each field configuring an input video signal into a plurality of blocks, and determine a motion of a block within the plurality of blocks between two fields adjacent to each other, the block of which the motion is determined having a same spatial position within the two fields adjacent to each other; a vertical edge detector that detects a vertical edge within each of the plurality of blocks in the each field; a moving block number counter that counts, among the blocks within a screen determined to have the motion by the moving block determining module, a number of blocks in which the vertical edge is not detected in the two fields, based on the detection result of the vertical edge detector and the determination result of the moving block determining module; a moving field determining module that determines a motion between the each field based on the counting result of the moving block number counter; a pulldown pattern detector that detects a 2:2 pulldown pattern based on the determination result of the moving field determining module; and a pulldown signal determining module that determines whether the input video signal is a 2:2 pulldown signal depending on the detection result of the pulldown pattern detector.