IMAGE ENCODING METHOD, IMAGE DECODING METHOD, IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, IMAGE ENCODING PROGRAM, IMAGE DECODING PROGRAM AND RECORDING MEDIUM RECORDED WITH THE PROGRAMS

摘要

PROBLEM TO BE SOLVED: To improve the efficiency of encoding by reducing the amount of encoding rotation angle information or scale factor information in an area without needing a rotation and a magnification/reduction in the encoding of a moving picture.

SOLUTION: A rotation magnified prediction picture preparation part 16 prepares a prediction picture on the basis of a division pattern, the rotation angle, the scale factor of various specified small areas, and a movement searching part 15 performs movement search among the prediction pictures every small area and a motion vector is obtained. From the results, an encoding method by which a prediction error becomes the minimum is decided, and division pattern information in the small area further dividing an area where an input picture is encoded and information for indicating whether or not the rotation/ angle information or the scale factor information in the area is to be encoded are encoded by a division pattern rotation magnification presence/absence encoding part 20. In the case of encoding the rotation angle information or the scale factor information, a rotation angle encoding part 21 encodes the rotation angle information and a scale factor encoding part 22 encodes the scale factor information.

COPYRIGHT: (C)2004,JPO