公开(公告)号：EP4002841A1

公开(公告)日：2022-05-25

申请号：EP20907984.7

申请日：2020-12-04

申请人： KDDI CORPORATION

发明人： UNNO, Kyohei ,  KAWAMURA, Kei ,  NAITO, Sei

IPC分类号： H04N19/126 ,  H04N19/157 ,  H04N19/176

摘要： An image decoding device 200 according to the present invention includes a quantization parameter deriving unit 220A configured to correct a value of a decoded quantization parameter of a target block depending on whether or not adaptive color transform has been applied to the target block, and then set, as the quantization parameter of the target block, the larger of the corrected value of the quantization parameter and a predetermined value of "0" or more.

公开(公告)号：EP3989552A1

公开(公告)日：2022-04-27

申请号：EP20904382.7

申请日：2020-12-02

申请人： KDDI Corporation

发明人： KIDANI, Yoshitaka ,  KAWAMURA, Kei ,  UNNO, Kyohei ,  NAITO, Sei

IPC分类号： H04N19/119 ,  H04N19/136 ,  H04N19/159 ,  H04N19/176 ,  H04N19/52 ,  H04N19/70

摘要： An image decoding device (200) includes: a merge unit (241A2) configured to apply geometric block partitioning merge to a target block divided in a rectangular shape, wherein the merge unit (241A2) includes: a merge mode specifying unit (241A21) configured to specify whether or not the geometric block partitioning merge is applied; a geometric block partitioning unit (241A22) configured to specify a geometric block partitioning pattern and further perform geometric block partitioning on the target block divided in the rectangular shape by using the specified geometric block partitioning pattern; and a merge list construction unit (241A23) configured to construct a merge list for the target block subjected to the geometric block partitioning and decode motion information.

公开(公告)号：EP3855736A1

公开(公告)日：2021-07-28

申请号：EP19862930.5

申请日：2019-08-29

申请人： KDDI Corporation

发明人： UNNO, Kyohei ,  KAWAMURA, Kei ,  NAITOU, Sei

IPC分类号： H04N19/105 ,  H04N19/136 ,  H04N19/176 ,  H04N19/533 ,  H04N19/57

摘要： An image decoding device includes a prediction unit configured to generate a prediction signal included in a prediction block based on a motion vector. The prediction unit is configured to perform refinement processing of setting a search range based on a reference position specified by the motion vector, specifying a corrected reference position having the smallest predetermined cost from the search range, and correcting the motion vector based on the corrected reference position. When a block size of the prediction block is larger than a predetermined block size, the prediction unit is configured to divide the prediction block into sub-block groups and perform the refinement processing for each sub-block.

公开(公告)号：EP4002845A1

公开(公告)日：2022-05-25

申请号：EP20865421.0

申请日：2020-08-21

申请人： KDDI Corporation

发明人： UNNO, Kyohei ,  KAWAMURA, Kei ,  NAITO, Sei

IPC分类号： H04N19/513 ,  H04N19/577 ,  H04N19/70

摘要： An image decoding device (200) includes: a decoding unit (210) configured to decode a first flag which is included in a slice header and controls enabling/disabling of PROF processing from encoded data; and an affine prediction signal generation unit (241F) configured to perform the PROF processing in a case where the first flag indicates that the PROF processing is enabled in a slice corresponding to the slice header, and generate a prediction signal without performing the PROF processing in a case where the first flag indicates that the PROF processing is disabled in a slice corresponding to the slice header.

公开(公告)号：EP3989570A1

公开(公告)日：2022-04-27

申请号：EP20827343.3

申请日：2020-06-11

申请人： KDDI Corporation

发明人： UNNO, Kyohei ,  KAWAMURA, Kei ,  NAITO, Sei

IPC分类号： H04N19/44 ,  H04N19/557

摘要： An image decoding device (200) includes: a motion vector decoding unit (241B) configured to decode a motion vector from coded data; and a refinement unit (241C) configured to search for the motion vector with a value of the motion vector decoded by the motion vector decoding unit (241B) as an initial value, and set the decoded motion vector as a final motion vector in a case where a searching cost at an initial searched point is larger than a predetermined threshold value or in a case where the searching cost at the initial searched point is equal to or larger than the threshold value.

公开(公告)号：EP3989553A1

公开(公告)日：2022-04-27

申请号：EP20832640.5

申请日：2020-06-11

申请人： KDDI Corporation

发明人： KIDANI, Yoshitaka ,  UNNO, Kyohei ,  KAWAMURA, Kei ,  NAITO, Sei

IPC分类号： H04N19/12 ,  H04N19/136 ,  H04N19/176 ,  H04N19/70

摘要： An image decoding device (200) includes: an inverse transform unit (220B/220C) configured to generate a prediction residual signal by inverse transform, the inverse transform unit (220B/220C) is configured to control a method of decoding a secondary transform index of a target block according to information indicating a position where a non-zero coefficient is generated in the target block.

公开(公告)号：EP3941064A1

公开(公告)日：2022-01-19

申请号：EP20768908.4

申请日：2020-03-04

申请人： KDDI Corporation

发明人： UNNO, Kyohei ,  KAWAMURA, Kei ,  NAITO, Sei

IPC分类号： H04N19/537 ,  H04N19/577

摘要： An image decoding device (200) includes: a motion vector decoding unit (241B) that decodes a motion vector from encoded data; a refinement unit (241C) that performs refinement processing to correct the decoded motion vector; and a predictive signal generation unit (241D) that generates a predictive signal on the basis of the corrected motion vector outputted from the refinement unit (241C). The predictive signal generation unit (241D) determines whether or not to apply BDOF processing for each block, on the basis of information calculated in the course of the refinement processing.