PREDICTION-SIGNAL PRODUCING DEVICE USING GEOMETRIC TRANSFORMATION MOTION-COMPENSATION PREDICTION, TIME-VARYING IMAGE ENCODING DEVICE, AND TIME-VARYING IMAGE DECODING DEVICE

摘要

Disclosed is a prediction-signal producing device comprising: a setting unit for setting prediction selection information indicating which of first and second geometric transformation parameters indicating the information relating to the shape of an image according to the geometric transformation of a pixel block is to be used; an acquiring unit for acquiring the motion information or geometric transformation parameter of one or more second adjacent blocks, which have already been subjected to the prediction signal producing treatment, of the first adjacent block adjacent to one of the pixel blocks having the image signals divided; a deriving unit for deriving the predicted geometric transformation parameters of one pixel block from the geometric transformation parameters of the second adjacent block; a setting unit for deriving the first geometric transformation parameter by a predetermined method from the derived values of the geometric transformation parameters and the predicted geometric transformation parameters and for setting the derived parameter; a setting unit for setting the second geometric transformation parameters on the basis of the motion information of one pixel block and the second adjacent block; and a producing unit for subjecting the reference image signals at the time of performing motion compensations for one pixel block, to a geometric transformation treatment by using the first or second geometric transformation parameters indicated in the selection information, thereby to produce a prediction signal.