Image coding method, image decoding method, image coding apparatus, and image decoding apparatus

An image decoding method of decoding each block among blocks of pictures, the decoding method comprising:

• deriving a candidate for a motion vector predictor to be used in decoding of a motion vector for a current block to be decoded, from a first motion vector of a first block included in a first picture, the first picture being different from a picture that includes the current block;
• adding the derived candidate to a list of candidates;
• selecting one motion vector predictor from the list of candidates;
• and
• decoding the current block using a motion vector of the current block and a reference picture of the current block, and decoding the motion vector using the selected motion vector predictor,
• wherein the deriving includes:
• determining whether the reference picture of the current block is a long-term reference picture or a short-term reference picture, and whether a first reference picture of the first block is a long-term reference picture or a short-term reference picture;
• deriving the candidate from the first motion vector based on the result of the determining.