Moving picture coding device, moving picture coding method, and moving picture coding program
A motion vector predictor candidate generation unit derives a plurality of motion vector predictor candidates by prediction from first coded prediction blocks neighboring a prediction block subject to coding within the same picture as the prediction block subject to coding, or from a second coded prediction block located at the same position as or in the neighborhood of the prediction block subject to coding in a picture different from that of the prediction block subject to coding, and adds the derived motion vector predictor candidates in a motion vector predictor candidate. The motion vector predictor candidate generation unit determines, for the purpose of obtaining a predetermined number of motion vector predictor candidates, which of first coded prediction blocks provides the motion vector from which to derive the motion vector predictor candidate, organizing the blocks in the order of priority.
1. A moving picture coding device adapted to code moving pictures in units of blocks obtained by partitioning each picture of the moving pictures, comprising:
a motion vector predictor candidate generation unit configured to derive one or more motion vector predictor candidates from motion vectors of coded prediction blocks neighboring a prediction block subject to coding within the same picture as the prediction block subject to coding, and to add the derived motion vector predictor candidates in a motion vector predictor candidate list,
wherein the motion vector predictor candidate generation unit determines, for the purpose of obtaining a predetermined number of motion vector predictor candidates, which of the coded prediction blocks provides the motion vector from which to derive the motion vector predictor candidate, such that the motion vector predictor candidate generation unit processes, in a predetermined order, prediction blocks in a block group neighboring to the left and in a block group neighboring above, said processing being done according to conditions 1 and 2 below in the stated order and then according to conditions 3 and 4 below in the stated order,
condition 1: there is found a motion vector that is predicted by using the same reference list and the same reference picture as that of the motion vector predictor subject to derivation in the prediction block subject to coding;
condition 2: there is found a motion vector that is predicted by using a reference list different from that of the motion vector predictor subject to derivation in the prediction block subject to coding and using the same reference picture as that of the motion vector predictor subject to derivation in the prediction block subject to coding;
condition 3: there is found a motion vector that is predicted by using the same reference list as that of the motion vector predictor subject to derivation in the prediction block subject to coding and using a reference picture different from that of the motion vector predictor subject to derivation in the prediction block subject to coding; and
condition 4: there is found a motion vector that is predicted by using a reference list different from that of the motion vector predictor subject to derivation in the prediction block subject to coding and using a reference picture different from that of the motion vector predictor subject to derivation in the prediction block subject to coding;
wherein the motion vector predictor candidate generation unit includes a processor and a memory storing software for executing by the processor.
2. A transmitting device comprising:
a packet processing unit adapted to packetize a bitstream coded by a moving picture coding method for coding moving pictures in units of blocks obtained by partitioning each picture of the moving pictures, so as to obtain a bitstream; and
a transmitting unit for transmitting the packetized bitstreams,
the moving picture coding method comprising:
deriving one or more motion vector predictor candidates from motion vectors of coded prediction blocks neighboring a prediction block subject to coding within the same picture as the prediction block subject to coding, and adding the derived motion vector predictor candidates in a motion vector predictor candidate list,
wherein the deriving of one or more motion vector predictor candidates determines, for the purpose of obtaining a predetermined number of motion vector predictor candidates, which of the coded prediction blocks provides the motion vector from which to derive the motion vector predictor candidate, such that the deriving of one or more motion vector predictor candidates processes, in a predetermined order, prediction blocks in a block group neighboring to the left and in a block group neighboring above, said processing being done according to conditions 1 and 2 below in the stated order and then according to conditions 3 and 4 below in the stated order,
condition 1: there is found a motion vector that is predicted by using the same reference list and the same reference picture as that of the motion vector predictor subject to derivation in the prediction block subject to coding;
condition 2: there is found a motion vector that is predicted by using a reference list different from that of the motion vector predictor subject to derivation in the prediction block subject to coding and using the same reference picture as that of the motion vector predictor subject to derivation in the prediction block subject to coding;
condition 3: there is found a motion vector that is predicted by using the same reference list as that of the motion vector predictor subject to derivation in the prediction block subject to coding and using a reference picture different from that of the motion vector predictor subject to derivation in the prediction block subject to coding; and
condition 4: there is found a motion vector that is predicted by using a reference list different from that of the motion vector predictor subject to derivation in the prediction block subject to coding and using a reference picture different from that of the motion vector predictor subject to derivation in the prediction block subject to coding.
3. A transmitting method comprising:
packetizing a bitstream coded by a moving picture coding method adapted to code moving pictures in units of blocks obtained by partitioning each picture of the moving pictures, so as to obtain a bitstream; and
transmitting the packetized bitstreams,
the moving picture coding method comprising:
deriving one or more motion vector predictor candidates from motion vectors of coded prediction blocks neighboring a prediction block subject to coding within the same picture as the prediction block subject to coding, and adding the derived motion vector predictor candidates in a motion vector predictor candidate list,
wherein the deriving of one or more motion vector predictor candidates determines, for the purpose of obtaining a predetermined number of motion vector predictor candidates, which of the coded prediction blocks provides the motion vector from which to derive the motion vector predictor candidate, such that the deriving of one or more motion vector predictor candidates processes, in a predetermined order, prediction blocks in a block group neighboring to the left and in a block group neighboring above, said processing being done according to conditions 1 and 2 below in the stated order and then according to conditions 3 and 4 below in the stated order,
condition 1: there is found a motion vector that is predicted by using the same reference list and the same reference picture as that of the motion vector predictor subject to derivation in the prediction block subject to coding;
condition 2: there is found a motion vector that is predicted by using a reference list different from that of the motion vector predictor subject to derivation in the prediction block subject to coding and using the same reference picture as that of the motion vector predictor subject to derivation in the prediction block subject to coding;
condition 3: there is found a motion vector that is predicted by using the same reference list as that of the motion vector predictor subject to derivation in the prediction block subject to coding and using a reference picture different from that of the motion vector predictor subject to derivation in the prediction block subject to coding; and
condition 4: there is found a motion vector that is predicted by using a reference list different from that of the motion vector predictor subject to derivation in the prediction block subject to coding and using a reference picture different from that of the motion vector predictor subject to derivation in the prediction block subject to coding.