| 摘要 |
A picture coding method for generating a coded picture signal Str on which rapid random access can be performed while preventing a decrease in compression rate. The method includes: a first reference restriction step (Step S 106 ) of restricting, in a target access unit to be processed (RAU), so that a post-entry picture refers to another picture except for the following pictures: a picture located before an entry picture in coding order, and a pre-entry picture; and a second reference restriction step (Step S 114 or Step S 116 ) of restricting, in the immediately following access unit (RAU), so that a pre-entry picture refers to another picture except for the following pictures: a picture located before an entry picture in the target access unit (RAU) in coding order, and a pre-entry picture in the target access unit (RAU).
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