Decoding method and apparatus with candidate motion vectors

摘要

A moving picture coding apparatus includes: a motion vector predictor candidate calculation unit which calculates one or more motion vector predictor candidates and the number of available predictor candidates; an inter prediction control unit which selects an optimum motion vector predictor candidate; and a variable length coding unit which sets the motion vector predictor candidate list size to the number of available predictor candidates, and variable-length codes a motion vector predictor index used for coding a motion vector, by assigning a bit string according to the motion vector predictor candidate list size to the index.

主权项

1. A moving picture decoding method for decoding a current block of a picture, comprising:
deriving a first candidate having a first motion vector predictor derived from a first motion vector that has been used to decode a first block; determining whether a total number of one or more candidates having the first candidate is less than a predetermined maximum candidate number; deriving a second candidate having a second motion vector predictor when the total number of the one or more candidates having the first candidate is less than the predetermined maximum candidate number; and decoding a coded index corresponding to a candidate having a motion vector predictor, wherein the candidate is one of a plurality of candidates having the first candidate and the second candidate, and the predetermined maximum candidate number is fixed for all blocks in the picture.