IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, IMAGE DECODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS

摘要

An image encoding method according to an embodiment of the present invention includes: a step (S102) of writing, to a sequence parameter set, buffer description definition information for defining a plurality of buffer descriptions; steps (S103 and S104) of selecting, for each processing unit which is a picture or a slice, one buffer description from the plurality of buffer descriptions and writing, to a first header of the processing unit included in an encoding bitstream, buffer description selection information for specifying selected buffer descriptions; and a step (S105) of encoding the processing unit using the selected buffer description. The buffer description definition information includes long-term information indicating a reference picture assigned to a long-term reference picture from among a plurality of reference pictures indicated by the plurality of buffer descriptions.