Abstract: A merging motion information candidate list construction unit generates a merging motion information candidate list, which is a list of merging motion information candidates, using a spatial merging motion information candidate and a temporal merging motion information candidate. A second merging motion information candidate supplying unit generates a new merging motion information candidate including, if a reference index indicates an available reference picture, the reference index and, if the reference index does not indicate an available reference picture, a predetermined reference index along with a motion vector having a size and a direction that are preset and adds the new merging motion information candidate to the merging motion information candidate list. A merging motion information selection unit selects one merging motion information candidate from the merging motion information candidate list to which the new merging motion information candidate has been added.

Abstract: A merging motion information candidate list construction unit generates a merging motion information candidate list, which is a list of merging motion information candidates, using a spatial merging motion information candidate and a temporal merging motion information candidate. A second merging motion information candidate supplying unit generates a new merging motion information candidate including, if a reference index indicates an available reference picture, the reference index and, if the reference index does not indicate an available reference picture, a predetermined reference index along with a motion vector having a size and a direction that are preset and adds the new merging motion information candidate to the merging motion information candidate list. A merging motion information selection unit selects one merging motion information candidate from the merging motion information candidate list to which the new merging motion information candidate has been added.

Abstract: A prediction information deriving unit derives the inter-prediction information candidates from inter-prediction information of a prediction block neighboring to a coding target prediction block or a prediction block present at the same position as or near the coding target prediction block in a coded picture at a temporally different position from the coding target prediction block. A candidate supplementing unit supplements inter-prediction information candidates having the same prediction mode, reference index, and motion vector until the number of inter-prediction information candidates reaches the designated number of candidates when the number of inter-prediction information candidates is smaller than the designated number of candidates.

Abstract: A prediction information deriving unit derives the inter-prediction information candidates from inter-prediction information of a prediction block neighboring to a coding target prediction block or a prediction block present at the same position as or near the coding target prediction block in a coded picture at a temporally different position from the coding target prediction block. A candidate supplementing unit supplements inter-prediction information candidates having the same prediction mode, reference index, and motion vector until the number of inter-prediction information candidates reaches the designated number of candidates when the number of inter-prediction information candidates is smaller than the designated number of candidates.

Abstract: A motion vector predictor candidate constructing unit performs prediction based on a motion vector of one of coded blocks neighboring a coding target block in the same picture as the coding target block, constructs a plurality of motion vector predictor candidates, and adds the motion vector predictor candidates to a motion vector predictor candidate list. A motion vector predictor candidate number limiting unit limits the number of motion vector predictor candidates added to the motion vector predictor candidate list to a maximum candidate number according to a size of a prediction block. A motion vector predictor selecting unit selects a motion vector predictor from the motion vector predictor candidate list. A coding unit codes information representing an index of the selected motion vector predictor in the motion vector predictor candidate list.

Abstract: A motion vector predictor candidate constructing unit performs prediction based on a motion vector of one of coded blocks neighboring a coding target block in the same picture as the coding target block, constructs a plurality of motion vector predictor candidates, and adds the motion vector predictor candidates to a motion vector predictor candidate list. A motion vector predictor candidate number limiting unit limits the number of motion vector predictor candidates added to the motion vector predictor candidate list to a maximum candidate number according to a size of a prediction block. A motion vector predictor selecting unit selects a motion vector predictor from the motion vector predictor candidate list. A coding unit codes information representing an index of the selected motion vector predictor in the motion vector predictor candidate list.

Abstract: A candidate list construction unit selects a plurality of blocks each having one or two pieces of motion information containing at least information about a motion vector and information about a reference picture from a plurality of neighboring encoded blocks of an encoding target block and constructs a candidate list containing candidates of the motion information used for the motion compensation prediction from the motion information of the selected blocks. A selected candidate generator generates a new candidate of the motion information by combining the motion information of a first prediction list derived by the first motion information deriving unit and the motion information of the second prediction list derived by a second motion information deriving unit.

Abstract: A merging motion information candidate list construction unit generates a merging motion information candidate list, which is a list of merging motion information candidates, using a spatial merging motion information candidate and a temporal merging motion information candidate. A second merging motion information candidate supplying unit generates a new merging motion information candidate including, if a reference index indicates an available reference picture, the reference index and, if the reference index does not indicate an available reference picture, a predetermined reference index along with a motion vector having a size and a direction that are preset and adds the new merging motion information candidate to the merging motion information candidate list. A merging motion information selection unit selects one merging motion information candidate from the merging motion information candidate list to which the new merging motion information candidate has been added.

Abstract: A merging motion information calculating unit calculates motion information of a plurality of coded neighboring blocks located at predetermined positions neighboring to a coding target block in space as spatial motion information candidates of the coding target block, in a case where there are spatial motion information candidates having the same motion information out of the spatial motion information candidates, sets one of the spatial motion information candidates having the same motion information as the spatial motion information candidate and, calculates a temporal motion information candidate of the coding target block by using the motion information of a coded block included in a picture that is different in time from a picture including the coding target block, and includes the spatial motion information candidates and the temporal motion information candidate in candidates for the motion information.

Abstract: In a first inter-image prediction mode in which information on a motion vector is used, a first mode detection unit constructs a first candidate list from a plurality of reference block candidates based on a first predetermined order, assigns indices for designating reference block candidates added in the first candidate list, and outputs the indices of the plurality of reference candidate blocks. In a second inter-image prediction mode in which is used a motion vector difference between a motion vector predictor based on information on a motion vector, and a motion vector of a coding target block, a second mode detection unit constructs a second candidate list from a plurality of reference block candidates based on a second predetermined order, assigns indices for designating reference block candidates added in the second candidate list, and outputs the indices of the plurality of reference block candidates and motion vector differences.

Abstract: A first vector predictor candidate list generating unit generates a first motion vector predictor candidate list from motion vectors of encoded neighboring blocks to blocks to be encoded. A second vector predictor candidate list generating unit generates a second motion vector predictor candidate list from motion vectors of blocks at the same positions as the blocks to be encoded in an encoded image and neighboring blocks to the blocks at the same positions. A combination determining unit determines whether to generate a third vector predictor candidate list combining the first and second vector predictor candidate lists by comparison of a block size of the blocks to be encoded and a threshold size. A vector predictor candidate list deciding unit generates the third vector predictor candidate list from the first vector predictor candidate list.

Abstract: A first vector predictor candidate list generating unit generates a first motion vector predictor candidate list from motion vectors of encoded neighboring blocks to blocks to be encoded. A second vector predictor candidate list generating unit generates a second motion vector predictor candidate list from motion vectors of blocks at the same positions as the blocks to be encoded in an encoded image and neighboring blocks to the blocks at the same positions. A combination determining unit determines whether to generate a third vector predictor candidate list combining the first and second vector predictor candidate lists by comparison of a block size of the blocks to be encoded and a threshold size. A vector predictor candidate list deciding unit generates the third vector predictor candidate list from the first vector predictor candidate list.

Abstract: A merging motion information candidate list construction unit generates a merging motion information candidate list, which is a list of merging motion information candidates, using a spatial merging motion information candidate and a temporal merging motion information candidate. A second merging motion information candidate supplying unit generates a new merging motion information candidate including, if a reference index indicates an available reference picture, the reference index and, if the reference index does not indicate an available reference picture, a predetermined reference index along with a motion vector having a size and a direction that are preset and adds the new merging motion information candidate to the merging motion information candidate list. A merging motion information selection unit selects one merging motion information candidate from the merging motion information candidate list to which the new merging motion information candidate has been added.

Abstract: A merging motion information candidate list construction unit generates a merging motion information candidate list, which is a list of merging motion information candidates, using a spatial merging motion information candidate and a temporal merging motion information candidate. A second merging motion information candidate supplying unit generates a new merging motion information candidate including, if a reference index indicates an available reference picture, the reference index and, if the reference index does not indicate an available reference picture, a predetermined reference index along with a motion vector having a size and a direction that are preset and adds the new merging motion information candidate to the merging motion information candidate list. A merging motion information selection unit selects one merging motion information candidate from the merging motion information candidate list to which the new merging motion information candidate has been added.

Abstract: A merging motion information candidate list construction unit generates a merging motion information candidate list, which is a list of merging motion information candidates, using a spatial merging motion information candidate and a temporal merging motion information candidate. A second merging motion information candidate supplying unit generates a new merging motion information candidate including, if a reference index indicates an available reference picture, the reference index and, if the reference index does not indicate an available reference picture, a predetermined reference index along with a motion vector having a size and a direction that are preset and adds the new merging motion information candidate to the merging motion information candidate list. A merging motion information selection unit selects one merging motion information candidate from the merging motion information candidate list to which the new merging motion information candidate has been added.

Abstract: In inter prediction that is performed by partitioning a first block, which is obtained by partitioning each picture, into one or more second blocks, a spatial merge candidate generating unit derives a spatial merge candidate without referring to a block included in a first block that includes a second block. In case of a mode where a coding block is divided by a horizontal border into prediction blocks arranged vertically, the reference index derivation unit of a time merge candidate sets reference index information of a time merge candidate to a value of reference index information of an encoded prediction block adjacent to a left edge of a prediction block subject to encoding.

Abstract: In inter prediction that is performed by partitioning a first block, which is obtained by partitioning each picture, into one or more second blocks, a spatial merge candidate generating unit derives a spatial merge candidate without referring to a block included in a first block that includes a second block. In case of a mode where a coding block is divided by a horizontal border into prediction blocks arranged vertically, the reference index derivation unit of a time merge candidate sets reference index information of a time merge candidate to a value of reference index information of an encoded prediction block adjacent to a left edge of a prediction block subject to encoding.

Abstract: In inter prediction that is performed by partitioning a first block, which is obtained by partitioning each picture, into one or more second blocks, a spatial merge candidate generating unit derives a spatial merge candidate without referring to a block included in a first block that includes a second block. In case of a mode where a coding block is divided by a horizontal border into prediction blocks arranged vertically, the reference index derivation unit of a time merge candidate sets reference index information of a time merge candidate to a value of reference index information of an encoded prediction block adjacent to a left edge of a prediction block subject to encoding.

Abstract: In inter prediction that is performed by partitioning a first block, which is obtained by partitioning each picture, into one or more second blocks, a spatial merge candidate generating unit derives a spatial merge candidate without referring to a block included in a first block that includes a second block. In case of a mode where a coding block is divided by a horizontal border into prediction blocks arranged vertically, the reference index derivation unit of a time merge candidate sets reference index information of a time merge candidate to a value of reference index information of an encoded prediction block adjacent to a left edge of a prediction block subject to encoding.

Abstract: A motion vector predictor candidate constructing unit performs prediction based on a motion vector of one of coded blocks neighboring a coding target block in the same picture as the coding target block, constructs a plurality of motion vector predictor candidates, and adds the motion vector predictor candidates to a motion vector predictor candidate list. A motion vector predictor candidate number limiting unit limits the number of motion vector predictor candidates added to the motion vector predictor candidate list to a maximum candidate number according to a size of a prediction block. A motion vector predictor selecting unit selects a motion vector predictor from the motion vector predictor candidate list. A coding unit codes information representing an index of the selected motion vector predictor in the motion vector predictor candidate list.