PREDICTION OF A MOVEMENT VECTOR OF A CURRENT IMAGE PARTITION HAVING A DIFFERENT GEOMETRIC SHAPE OR SIZE FROM THAT OF AT LEAST ONE ADJACENT REFERENCE IMAGE PARTITION AND ENCODING AND DECODING USING ONE SUCH PREDICTION

摘要

The invention relates to a method for predicting a movement vector (MVp1) of a partition (P1) of a current image (I_N) from a plurality of n reference movement vectors associated respectively with n reference partitions that have been previously encoded and decoded. For a spatial prediction of one such vector, when the geometric shape of the current partition is different from that of k adjacent reference partitions (pr1, pr2, . . . prk), with k≦n, the movement vector of the current image partition is determined from a function of at least one reference movement vector belonging to a set of k reference movement vectors associated respectively with k adjacent reference partitions.