Patent Document ID: 8953689
Application ID: 13482411
Patent Status: 1

Claim One:
1. An image decoding method for decoding a current block, comprising: deriving a first candidate having a first motion vector that has been used to decode a first block; deriving a second candidate having a second motion vector that has been used to decode a second block, the second block being different from the first block; determining whether or not a total number of candidates having the first candidate and the second candidate is less than a maximum candidate number; deriving a third candidate having a third motion vector and a fourth motion vector when the total number of candidates having the first candidate and the second candidate is less than the maximum candidate number, the third motion vector being identical to the first motion vector, the fourth motion vector being identical to the second motion vector; and decoding a coded index corresponding to a candidate having a motion vector, wherein the maximum candidate number is used to decode the coded index, wherein a bitstream has the coded index, wherein the motion vector is used to decode the current block, and wherein the candidate is one of a plurality of candidates having the first candidate, the second candidate, and the third candidate.