Picture coding apparatus and picture decoding apparatus

摘要

The present invention provides a picture coding apparatus which can reduce a load in decoding. When a RAU to be coded is an open GOP type RAU, the present invention includes: a motion estimation unit (401), a motion compensation unit (402), and the like which codes a picture to be coded to generate a BI-picture; a BI information generation unit (413) which generates a RAU map MIa) indicating whether or not the BI-picture is positioned in a display order immediately before a starting I-picture in the RAU of the stream (STR); and a variable length coding unit (411) which writes the RAU map (MIa) into the RAU of the stream (STR).