IMAGE ENCODING METHOD, IMAGE DECODING METHOD, IMAGE ENCODING DEVICE, AND IMAGE DECODING DEVICE

摘要

It is possible to further improve encoding and decoding efficiency of image data. For this, the image data constituting a dynamic image or a still image is classified into a plurality of information pieces generated from the image data itself. When encoding the plurality of classified information pieces, encoding to change an encoded state of other information constituting the image data is performed according to a value of some of information pieces among the classified plurality of information pieces, thereby performing encoding with a reduced information amount of a part of information. Moreover, when decoding the information thus encoded, some of the information pieces are detected from the state of information pieces constituting the image data and the detected information and other information are decoded so that an original image is reproduced according to the respective decoded information pieces.