IMAGE CODING METHOD AND IMAGE CODING APPARATUS

摘要

An image coding method according to an aspect of the present invention includes: writing, into a sequence parameter set, buffer description defining information for defining a plurality of buffer descriptions (S102); selecting one of the buffer descriptions for each processing unit that is a picture or a slice, and writing buffer description selecting information for specifying the selected buffer description, into a first header of the processing unit which is included in the coded bitstream (S103 and S104); and coding the processing unit using the selected buffer description (S105), and the buffer description defining information includes long-term information for identifying, among a plurality of reference pictures covered by the buffer descriptions, a reference picture to be assigned as a long-term reference picture.