Abstract: An image decoding apparatus is provided with a CT information decoding unit that decodes division information indicating a division method for binary tree division with respect to a coding node of a coding tree unit, and performs the binary tree division with respect to the coding node by referring to the division information of another decoded coding node.

Abstract: An image decoding apparatus is provided with a CT information decoding unit that decodes division information indicating a division method for binary tree division with respect to a coding node of a coding tree unit, and performs the binary tree division with respect to the coding node by referring to the division information of another decoded coding node.

Abstract: An image decoding apparatus includes: an MPM candidate list deriving unit that derives an MPM candidate list by adding a plurality of different intra prediction modes to the MPM candidate list based on a shape of a target block, and an MPM parameter decoding unit decoding parameters for deriving the intra-prediction modes from the MPM candidate list.

Abstract: An intra prediction image decoding apparatus is provided with a prediction parameter derivation circuitry that derives prediction parameters of multiple luminance blocks. A Cross-component Linear Model (CCLM) is used to specify the model and the prediction parameter is obtained, and thus an intra prediction image with reference to the prediction parameters is generated.

Abstract: An image decoding apparatus is provided with a CT information decoding unit that decodes division information indicating a division method for binary tree division with respect to a coding node of a coding tree unit, and performs the binary tree division with respect to the coding node by referring to the division information of another decoded coding node.

Abstract: The accuracy of a motion vector is switched based on a picture or a slice. An inter prediction parameter decoding control unit shifts a difference vector by using a shift amount that is identified by a flag for which a value range is configured based on a mode configured for a predetermined region of a reference image including a plurality of prediction blocks.

Abstract: To improve coding efficiency, an image decoding apparatus (31) is provided with a prediction image generation unit (308) configured to derive prediction parameters of multiple luminance blocks included in a target coding unit, derive multiple sub-block coordinates in a chrominance block corresponding to the target coding unit, and generate an intra prediction image with reference to the prediction parameters derived for the luminance block corresponding to each sub-block specified by each of the derived coordinates.

Abstract: It is an object to provide an image decoding device and an image encoding device that can achieve high coding efficiency with a low throughput. An image decoding device (31) includes a block parameter deriver (5211) configured to derive a block index by referring to a pixel value of an unfiltered decoded image in a target unit area, and a filter processor (525) configured to perform adaptive filter processing on the unfiltered decoded image in the target unit area, by using a filter coefficient in accordance with the block index.

Abstract: An image decoding apparatus includes: an MPM candidate list deriving unit that derives an MPM candidate list by adding a plurality of different intra prediction modes to the MPM candidate list based on a shape of a target block, and an MPM parameter decoding unit decoding parameters for deriving the intra-prediction modes from the MPM candidate list.

Abstract: An image decoding apparatus is provided with a CT information decoding unit that decodes division information indicating a division method for binary tree division with respect to a coding node of a coding tree unit, and performs the binary tree division with respect to the coding node by referring to the division information of another decoded coding node.

Abstract: A prediction vector generation device generating a prediction vector of a disparity vector of a target block in a non-base viewpoint image includes a conversion pixel determination unit determining at least one pixel position in a depth block corresponding to the target block in a depth map corresponding to the non-base viewpoint image, a disparity vector conversion unit calculating a representative value of a depth value of the at least one pixel position determined by the conversion pixel determination unit and converting the representative value into a disparity vector, and a prediction vector determination unit generating the prediction vector of the disparity vector of the target block by using the disparity vector generated by the disparity vector conversion unit. This prediction vector generation device provides good encoding efficiency and suppresses increases in the amount of computation.

Abstract: An image decoding apparatus includes a unit configured to set an unreferenced region depending on whether information concerning a horizontal direction is defined, out of information indicating the unreferenced region. The image decoding apparatus further includes a unit configured to decode a flag that is to be set depending on whether a loop filter is related as information indicating the unreferenced region.

Abstract: An improvement in efficiency in an image decoding process is intended. An image coding device codes a texture image and a depth image. In the coding, the image coding device performs coding of the texture image by using depth information and coding of the texture image without using the depth information while following a coding control parameter. Further, the image coding device codes use result information that indicates whether or not the depth information is used in coding the texture image. An image decoding device decodes the texture image and the depth image. In the decoding, the image decoding device decodes the depth image in a case where decoded use result information indicates that the depth information is used and skips a decoding process of the depth image in a case where the depth information is not used.

Abstract: An image decoding device includes an illumination compensation flag derivation section that derives an illumination compensation flag indicating whether illumination compensation is executed and an illumination compensation section (3093) that generates a predicted image of a target prediction unit using illumination change parameters derived from an image in a neighbor of the target prediction unit on a target image and a reference region image of a reference image corresponding to the target prediction unit in a case where the illumination compensation flag is a value indicating validity. In a case where a prediction unit which is a generation target of the predicted image is in a merge mode, the illumination compensation flag derivation section decodes the illumination compensation flag from coded data.

Abstract: An image decoding device includes an illumination compensation flag derivation section that derives an illumination compensation flag indicating whether illumination compensation is executed and an illumination compensation section (3093) that generates a predicted image of a target prediction unit using illumination change parameters derived from an image in a neighbor of the target prediction unit on a target image and a reference region image of a reference image corresponding to the target prediction unit in a case where the illumination compensation flag is a value indicating validity. In a case where a prediction unit which is a generation target of the predicted image is in a merge mode, the illumination compensation flag derivation section decodes the illumination compensation flag from coded data.

Abstract: A prediction vector generation device generating a prediction vector of a disparity vector of a target block in a non-base viewpoint image includes a conversion pixel determination unit determining at least one pixel position in a depth block corresponding to the target block in a depth map corresponding to the non-base viewpoint image, a disparity vector conversion unit calculating a representative value of a depth value of the at least one pixel position determined by the conversion pixel determination unit and converting the representative value into a disparity vector, and a prediction vector determination unit generating the prediction vector of the disparity vector of the target block by using the disparity vector generated by the disparity vector conversion unit. This prediction vector generation device provides good encoding efficiency and suppresses increases in the amount of computation.

Abstract: A prediction vector generation device generating a prediction vector of a disparity vector of a target block in a non-base viewpoint image includes a conversion pixel determination unit determining at least one pixel position in a depth block corresponding to the target block in a depth map corresponding to the non-base viewpoint image, a disparity vector conversion unit calculating a representative value of a depth value of the at least one pixel position determined by the conversion pixel determination unit and converting the representative value into a disparity vector, and a prediction vector determination unit generating the prediction vector of the disparity vector of the target block by using the disparity vector generated by the disparity vector conversion unit. This prediction vector generation device provides good encoding efficiency and suppresses increases in the amount of computation.

Abstract: A disparity vector generation section generates disparity vectors indicating a part of a disparity between a first layer image and a second layer image different from the first layer image and different part of the disparity based on a code indicating the part of the disparity. A predicted image generation section reads a reference image of a region indicated by the disparity vector generated by the disparity vector generation section from a reference image storage section that stores the reference image and generates a predicted image based on the read reference image.

Abstract: An image decoding apparatus includes a unit configured to set an unreferenced region depending on whether information concerning a horizontal direction is defined, out of information indicating the unreferenced region. The image decoding apparatus further includes a unit configured to decode a flag that is to be set depending on whether a loop filter is related as information indicating the unreferenced region.

Abstract: An image decoding apparatus includes a unit configured to set an unreferenced region depending on whether information concerning a horizontal direction is defined, out of information indicating the unreferenced region. The image decoding apparatus further includes a unit configured to decode a flag that is to be set depending on whether a loop filter is related as information indicating the unreferenced region.