METHOD AND DEVICE FOR COMPENSATING MOTION OF PICTURE WHOSE RESOLUTION IS CONVERTED

摘要

PURPOSE:To compensate the motion of a moving picture signal by magnifying/ reducing the signal at an optional magnification. CONSTITUTION:A fraction part of a motion vector is inputted from a longitudinal lateral separation device 73 to a coefficient decision device 97 in a lateral filter 74B of a motion compensation device and a filter coefficient required for real number motion compensation is fed to multipliers 94-0-94-N. The multipliers 94-0-94-N form a filter whose tap number is N with delay devices 93-1-93-N-1, the coefficient decision device 97 calculates a filter coefficient required for the real number motion compensation with an optional tap number M, the motion is compensated by each of the delay devices 93, each of the multipliers 94 and an adder 96 and its output is fed to a longitudinal filter 75. The processing in the longitudinal filter 75 is similar to that in the lateral filter 74B to compensate the motion in the longitudinal direction. Thus, the picture quality of a decoded picture subject to prediction coding is improved.