Decoding method and apparatus with candidate motion vectors

摘要

An image coding method bitstream includes: determining a maximum number of a merging candidate which is a combination of a prediction direction, a motion vector, and a reference picture index for use in coding of a current block; deriving a first merging candidate; determining whether or not a total number of the first merging candidate is smaller than the maximum number; deriving a second merging candidate when it is determined that the total number of the first merging candidate is smaller than the maximum number; selecting a merging candidate for use in the coding of the current block from the first merging candidate and the second merging candidate; and coding, using the maximum number, an index for identifying the selected merging candidate, and attaching the coded index to the bitstream.

主权项

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; determining whether or not a total number of one or more candidates having the first candidate is less than a maximum candidate number; deriving a second candidate having a second motion vector when the total number of the one or more candidates having the first candidate is less than the maximum candidate number, the second candidate being different from the first candidate; 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 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 and the second candidate.