DYNAMIC IMAGE DECODING DEVICE, DYNAMIC IMAGE DECODING METHOD, AND DYNAMIC IMAGE DECODING PROGRAM, AND RECEPTION DEVICE, RECEPTION METHOD, AND RECEPTION PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a device, a method, and a program capable of improving encoding efficiency by reducing an amount of generated code of encoding information to be transmitted.SOLUTION: In inter-prediction performed by dividing a first block obtained by dividing each picture, into one or a plurality of second blocks, a space merge candidate generator 230 derives a space merge candidate without referring to a block included in the first block including the second block. A reference index deriving part 231 for a time merge candidate, in a case of a mode for dividing an encoded block into upper and lower prediction blocks at a horizontal boundary, sets reference index information on the time merge candidate to a value of reference index information on a decoded prediction block close to a left side of a prediction block of a decoding target, and in a case of a mode for dividing the encoded block into right and left prediction blocks at a vertical boundary, sets the reference index information of the time merge candidate to a value of reference index information on a decoded prediction block close to an upper side of the prediction block of the decoding target.