Patent ID: 7274408

Claim:
A method of motion detection for a 3D comb filter video decoder, suitable for use in a National Television Standards Committee (NTSC) system, the method comprising: sampling a composite video signal to obtain and register a plurality of sampling data F m P x,y , wherein F m P x,y represents a sampling data of the composite video signal from the m th frame in x th line at y th pixel; and judging whether the composite video signal to be a motion state or a still state, according to the sampling data of F m+1 P x,y , F m P x,y , F m−1 P x,y , and F m−2 P x,y , comprising: using the sampling data of F m+1 P x,y , F m P x,y , F m−1 P x,y , and F m−2 P x,y to calculate and obtain a plurality of maximum differences MD x,y , wherein MD x,y represents the maximum difference for the y th pixel in the x th line; selecting the maximum differences for any adjacent four pixels to take an average, for obtaining a plurality of motion factors MF x,y , wherein MF x,y represents the motion factor for the y th pixel in the x th line; and detecting the motion factor MF x,y to judge whether the composite video signal to be the motion state or the still state.