Abstract: The problem when the use range of images for use in intra-prediction is expanded is that the requirement for line buffer size increases depending on the range of expansion, and, in order to solve this problem, the use range of imaged for use in intra-prediction is adaptively controlled. The intra-prediction apparatus 100 of the present invention has, a control section 115 that controls, based on the relationship between the position of a candidate image for use in intra-prediction for a block to be processed and the position of the unit where the block to be processed belongs, the partial range for use for intra-prediction beyond the end portion of the unit in a predetermined direction in the use range of the image for use for intra-prediction to be equal to or less than a predetermined maximum range.

Abstract: A video encoding device for encoding video using inter prediction includes encoding control means 11 for controlling an inter-PU partition type of a CU to be encoded, based on a minimum inter-PU size (PA) and a CU size (PB) of the CU to be encoded. A video decoding device includes decoding control means for controlling an inter-PU partition of a CU to be decoded, based on the minimum inter-PU size (PA) and the size (PB) of the CU to be decoded.

Abstract: A video encoding device includes encoding control means 11 for controlling an inter-PU partition type of a CU to be encoded, based on the maximum number (PA) of motion vectors allowed for an image block having a predetermined area and the number (PB) of motion vectors of an encoded image block contained in the image block having the predetermined area. A video decoding device includes decoding control means for controlling an inter-PU partition type of a CU to be decoded, based on the maximum number (PA) of motion vectors allowed for an image block having a predetermined area and the number (PB) of motion vectors of a decoded image block contained in the image block having the predetermined area.

Abstract: In a video decoding device, a quantization step size decoding unit calculates a quantization step size that controls a granularity of the inverse quantization by, based on an image prediction, selectively using a mean value of at least a quantization step size assigned to a leftwardly adjacent neighboring image block already decoded and a quantization step size assigned to a upwardly adjacent neighboring image block already decoded or a quantization step size assigned to an image block decoded immediately before.

Abstract: In a video decoding device, a quantization step size decoding unit calculates a quantization step size that controls a granularity of the inverse quantization by, based on an image prediction, selectively using a mean value of at least a quantization step size assigned to a leftwardly adjacent neighboring image block already decoded and a quantization step size assigned to a upwardly adjacent neighboring image block already decoded or a quantization step size assigned to an image block decoded immediately before.

Abstract: In a video decoding device, a quantization step size decoding unit calculates a quantization step size that controls a granularity of the inverse quantization by, based on an image prediction, selectively using a mean value of at least a quantization step size assigned to a leftwardly adjacent neighboring image block already decoded and a quantization step size assigned to a upwardly adjacent neighboring image block already decoded or a quantization step size assigned to an image block decoded immediately before.

Abstract: A video encoding device for encoding video using inter prediction includes encoding control means 11 for controlling an inter-PU partition type of a CU to be encoded, based on a minimum inter-PU size (PA) and a CU size (PB) of the CU to be encoded. A video decoding device includes decoding control means for controlling an inter-PU partition of a CU to be decoded, based on the minimum inter-PU size (PA) and the size (PB) of the CU to be decoded.

Abstract: A video encoding device includes encoding control means 11 for controlling an inter-PU partition type of a CU to be encoded, based on the maximum number (PA) of motion vectors allowed for an image block having a predetermined area and the number (PB) of motion vectors of an encoded image block contained in the image block having the predetermined area. A video decoding device includes decoding control means for controlling an inter-PU partition type of a CU to be decoded, based on the maximum number (PA) of motion vectors allowed for an image block having a predetermined area and the number (PB) of motion vectors of a decoded image block contained in the image block having the predetermined area.

Abstract: In a video encoding device, a transmission section sets a value corresponding to characteristics specified by ITU-R BT.709 to 1 in the transfer characteristics syntax when the dynamic range of the video signal is a SDR (Standard Dynamic Range), and sets a value corresponding to one of characteristics specified by HLG (Hybrid Log Gamma) to 18 or a value corresponding to one of characteristics specified by PQ (Perceptual Quantizer) to 16 when the dynamic range of the video signal is a HDR (High Dynamic Range).

Abstract: A video decoding device includes a demultiplexer which demultiplexes a video bitstream including video data of an encoded slice, Supplemental-Enhancement-Information having first information indicating a leading picture in gradual refresh, and Supplemental-Enhancement-Information having second information indicating segments where a refresh has completed in a current picture; an extractor which extracts the second information from a message which is part of the demultiplexed Supplemental-Enhancement-Information; and a video decoder which decodes image data from the demultiplexed video bitstream by using at least inter prediction, wherein the video decoder starts decoding based on the leading picture in gradual refresh.

Abstract: A video decoding device and method, including extracting PCM block size information including a threshold, from a bitstream, determining the threshold based on the extracted PCM block size information; parsing a PCM header from the bitstream with respect to an encoded block, only when said encoded block is prediction mode of intra prediction and a block size of said encoded block is equal to or greater than the determined threshold, controlling an entropy decoding process and a PCM decoding process based on the parsed PCM header; parsing transformed data of a prediction error data of an image in the bitstream; and PCM-decoding PCM data of the image in the bitstream, wherein the decoding performs the decoding operation based on the prediction mode being intra prediction and based on the block size of the encoded block being equal to or greater than the determined threshold.

Abstract: A video encoding device 10 includes: an quadtree split flag encoding unit 11 for entropy-encoding a flag indicating whether or not a block is partitioned based on a quadtree structure; a skip flag encoding unit 12 for entropy-encoding a skip flag of an end node in a quadtree structure; a binary tree information encoding unit 13 for entropy-encoding a flag indicating whether or not a block of the end node in the quadtree structure is partitioned based on a binary tree structure and a horizontal/vertical splitting direction flag indicating a splitting direction; and a size multiplexing unit 14 for multiplexing information indicating a minimum size of partitioning based on the binary tree structure, in a bitstream, wherein in the case where a node of a size equal to the minimum size is further partitioned based on the binary tree structure, the binary tree information encoding unit 13 does not entropy-encode the horizontal/vertical splitting direction flag at the node.

Abstract: A video coding device performs video coding using a block based affine transform motion compensated prediction technique that includes a process of calculating a motion vector of each subblock using motion vectors of control points in a block. The video coding device includes block based affine transform motion compensated prediction control means for controlling at least one of a block size, a prediction direction, and a motion vector precision of the subblock in the block subjected to the block based affine transform motion compensated prediction, using a coding parameter supplied from outside.

Abstract: In a video decoding device, a quantization step size decoding unit calculates a quantization step size that controls a granularity of the inverse quantization by, based on an image prediction, selectively using a mean value of at least a quantization step size assigned to a leftwardly adjacent neighboring image block already decoded and a quantization step size assigned to a upwardly adjacent neighboring image block already decoded or a quantization step size assigned to an image block decoded immediately before.

Abstract: A video encoding device includes: transform means 11 for transforming an image block; entropy encoding means 12 for entropy-encoding transformed data of the image block transformed by the transform means 11; PCM encoding means 13 for PCM-encoding the image block; multiplex data selection means 14 for selecting output data of the entropy encoding means 12 or the PCM encoding means 13, in a block of a block size set from the outside; and multiplexing means 15 for embedding a PCM header in a bitstream, in the block of the set from the outside block size.

Abstract: A video decoding device includes a demultiplexer which demultiplexes Supplemental-Enhancement-Information having information indicating segments where a refresh has completed in a current picture, the segments including an intra-encoded-segment in the current picture, and a video bitstream including video data of an encoded slice; an extractor which extracts the information from a message which is part of the demultiplexed Supplemental-Enhancement-Information; and a video decoder which decodes image data from the demultiplexed video bitstream.

Abstract: A video coding device performs video coding using a block based affine transform motion compensated prediction technique that includes a process of calculating a motion vector of each subblock using motion vectors of control points in a block. The video coding device includes block based affine transform motion compensated prediction control means for controlling at least one of a block size, a prediction direction, and a motion vector precision of the subblock in the block subjected to the block based affine transform motion compensated prediction, using at least one of an image size, a prediction direction of the block, and a difference between the motion vectors of the control points in the block.

Abstract: In a video encoding device, a transmission section sets a value corresponding to characteristics specified by ITU-R BT.709 to 1 in the transfer characteristics syntax when the dynamic range of the video signal is a SDR (Standard Dynamic Range), and sets a value corresponding to one of characteristics specified by HLG (Hybrid Log Gamma) to 18 or a value corresponding to one of characteristics specified by PQ (Perceptual Quantizer) to 16 when the dynamic range of the video signal is a HDR (High Dynamic Range).

Abstract: A video encoding device is a video encoding device for appropriately selecting a scalable encoding structure from a plurality of scalable encoding structures to generate a bitstream, using dynamic range-related video signal information, and includes an encoding section for selecting the scalable encoding structure capable of transmitting the dynamic range-related video signal information for switching a dynamic range, when a video signal to be encoded is switched from an SDR (a standard dynamic range) signal to an HDR (a high dynamic range) signal or switched from the HDR signal to the SDR signal in a temporal direction.

Abstract: A video encoding device 10 includes: an entropy encoding unit 11 for entropy-encoding data relating to a quadtree structure and data relating to a binary tree structure; and an encoding prohibition unit 12 for, in the case where a block obtained by partitioning based on the quadtree structure is not partitioned based on the binary tree structure, prohibiting entropy-encoding the data relating to the binary tree structure of the block.