Patent ID: 9578346
Date: 2017-02-21
CPC Classifications: H04N

Claim:
1. An image coding method for generating a coded bitstream by coding an image, the image coding method comprising: constructing a first reference list including a plurality of pictures, each of the pictures having a Picture Order Count (POC) assigned thereto and being identified by one of a plurality of reference indexes, the reference indexes corresponding one to one with the pictures included in the first reference list, each of the reference indexes having a different index value, the first reference list being constructed based on the POC assigned to each of the plurality of pictures; reordering the pictures included in the first reference list to generate a modified reference list by assigning new reference indexes using the reference indexes, the new reference indexes corresponding one to one with the pictures included in the modified reference list, each of the new reference indexes having a different index value; writing, into the coded bitstream, reference list reordering information for indicating details of the reordering; and coding the image using the POC assigned to each of the pictures and the modified reference list resulting from the reordering, wherein each of the reference indexes (i) identifies one of the pictures included in the first reference picture list such that the reference indexes correspond one to one with the pictures included in the first reference list and (ii) is used in assigning the new reference indexes in the reordering.