| 摘要 |
A computer-implemented image decoding method of decoding a current picture per block with prediction using one or both of (i) a first reference picture list including a first current reference picture for a 5 current block, the first current reference picture being referred to by a first current motion vector and (ii) a second reference picture list, the image decoding method comprising: judging whether or not a second current reference picture for the current block is identical to a second adjacent reference picture for an adjacent block adjacent to 10 the current block, the second current reference picture being (i) included in the second reference picture list and (ii) referred to by a second current motion vector, and the second adjacent reference picture being (i) included in a second adjacent reference picture list and (ii) referred to by a second adjacent motion vector; when the 15 second current reference picture is judged to be identical to the second adjacent reference picture, adding the second adjacent motion vector to a candidate list for the second current motion vector; when the second current reference picture is judged to not be identical to the second adjacent reference picture, (A) judging whether or not the 20 second current reference picture is identical to a first adjacent reference picture for the adjacent block, the first adjacent reference picture being (i) included in a first adjacent reference picture list and (ii) referred to by the first adjacent motion vector, and (B) when the second current reference picture is judged to be identical to the first 25 adjacent reference picture, adding the first adjacent motion vector to the candidate list for the second current motion vector; selecting a predicted motion vector to be used for decoding the second current motion vector from the candidate list for second current motion vector; and decoding the second current motion vector using the 30 selected predicted motion vector, wherein when the second current reference picture is judged to not be identical to the first adjacent reference picture, the first adjacent motion vector is not added to the candidate list for the second current motion vector. 7673799_1 (GHMatters) P92393.AU.1 27/04/2016 Image coding apparatus Addition 301 unit Selecting -- 302 unit Coding 303 unit Start Add adjacent motion vector to candidate list S701 -S702 Select predicted motion vector from candidate list Code motion vector using predicted motion vector S703 End |
