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公开(公告)号：US20220021892A1
公开(公告)日：2022-01-20
申请号：US17311302
申请日：2019-12-02
发明人： TIANYANG ZHOU , TOMOHIRO IKAI , EIICHI SASAKI , YUKINOBU YASUGI
IPC分类号： H04N19/44 , H04N19/96 , H04N19/119 , H04N19/186 , H04N19/176
摘要： In conventional cases that different trees are used between luma and chroma and that luma chroma prediction including multiplication in chroma intra prediction is used, there is a problem in that a processing delay caused by the chroma intra prediction is increased in small blocks. In a case that two different trees are used between luma and chroma, in a case of an 8×8 block in a luma size, 0 is derived without decoding qt_split_cu_flag, and in a case of an 8×4/4×8 block in a luma size, 0 is derived without decoding mtt_split_cu_flag. In a case that the size of a target block is smaller than a prescribed size, a chroma intra mode is derived from any one of DC, leftward prediction, and upward prediction.
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公开(公告)号：US20210092479A1
公开(公告)日：2021-03-25
申请号：US16954866
申请日：2018-10-30
发明人： HIDEO NAMBA , HIROMICHI TOMEBA , TOMOHIRO IKAI , TAKASHI ONODERA , YASUHIRO HAMAGUCHI , NORIO ITOH
摘要： By transmitting region reconstruction information from a network side device to a terminal side device, quality is enhanced in video reconstruction by super resolution techniques or the like. A video is divided into multiple regions, and the region reconstruction information includes video reconstruction information for each of the multiple regions divided. The region reconstruction information is generated based on the classification information associated with the video.
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公开(公告)号：US20210076076A1
公开(公告)日：2021-03-11
申请号：US17096198
申请日：2020-11-12
发明人： TOMOHIRO IKAI
IPC分类号： H04N19/96 , H04N19/174 , H04N19/176 , H04N19/44 , H04N19/60
摘要： The present invention avoids waste caused by performing both a Secondary Transform and an Adaptive Multiple Core Transform. Provided is a device including: a core transform unit (1521) that can perform an Adaptive Multiple Core Transform on a Coding Tree Unit; and a Secondary Transform unit (1522) that can perform, before the Adaptive Multiple Core Transform, a Secondary Transform on at least any one of sub-blocks included in the Coding Tree Unit. The device omits any of the Adaptive Multiple Core Transform and the Secondary Transform in accordance with at least any of a flag associated with the Adaptive Multiple Core Transform and a flag associated with the Secondary Transform, or in accordance with a size of the Coding Tree Unit.
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4.发明申请公开(公告)号：US20190246108A1
公开(公告)日：2019-08-08
申请号：US16341918
申请日：2017-08-23
发明人： TOMOKO AONO , YUKINOBU YASUGI , TOMOHIRO IKAI
IPC分类号： H04N19/13 , H04N19/11 , H04N19/159 , H04N19/46 , H04N19/176 , H04N19/169
CPC分类号： H04N19/13 , H04N19/11 , H04N19/159 , H04N19/169 , H04N19/176 , H04N19/1887 , H04N19/46 , H04N19/463 , H04N19/70 , H04N19/91
摘要： To improve the coding efficiency of intra-frame prediction of CU obtained by picture split. The present disclosure varies, based on the type of intra-frame prediction mode and/or the frequency of occurrence, the method of deriving a list used in estimation of the intra-frame prediction mode, and the binarization method in a case of entropy coding the intra-frame prediction mode.
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公开(公告)号：US20220377387A1
公开(公告)日：2022-11-24
申请号：US17842067
申请日：2022-06-16
发明人： TOMOHIRO IKAI
IPC分类号： H04N19/96 , H04N19/174 , H04N19/60 , H04N19/44 , H04N19/176
摘要： The present invention avoids waste caused by performing both a Secondary Transform and an Adaptive Multiple Core Transform. Provided is a device including: a core transform unit (1521) that can perform an Adaptive Multiple Core Transform on a Coding Tree Unit; and a Secondary Transform unit (1522) that can perform, before the Adaptive Multiple Core Transform, a Secondary Transform on at least any one of sub-blocks included in the Coding Tree Unit. The device omits any of the Adaptive Multiple Core Transform and the Secondary Transform in accordance with at least any of a flag associated with the Adaptive Multiple Core Transform and a flag associated with the Secondary Transform, or in accordance with a size of the Coding Tree Unit.
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公开(公告)号：US20200021837A1
公开(公告)日：2020-01-16
申请号：US16469367
申请日：2017-11-17
发明人： TOMOHIRO IKAI , YOSHIYA YAMAMOTO , NORIO ITOH
IPC分类号： H04N19/513 , H04N19/137 , H04N19/46 , H04N19/176
摘要： 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.
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7.发明申请公开(公告)号：US20190327466A1
公开(公告)日：2019-10-24
申请号：US16470901
申请日：2017-12-13
IPC分类号： H04N19/11 , H04N19/176 , H04N19/186 , H04N19/593 , H04N19/182 , H04N19/70
摘要： 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.
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8.发明申请公开(公告)号：US20190208201A1
公开(公告)日：2019-07-04
申请号：US16328690
申请日：2017-08-07
发明人： YUKINOBU YASUGI , TOMOHIRO IKAI , YOSHIYA YAMAMOTO
IPC分类号： H04N19/119 , H04N19/11 , H04N19/105 , H04N19/96 , H04N19/159 , H04N19/176
CPC分类号： H04N19/119 , H04N19/105 , H04N19/11 , H04N19/159 , H04N19/176 , H04N19/463 , H04N19/593 , H04N19/70 , H04N19/96
摘要： 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.
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公开(公告)号：US20220191527A1
公开(公告)日：2022-06-16
申请号：US17436730
申请日：2020-03-05
发明人： TIANYANG ZHOU , EIICHI SASAKI , TOMOHIRO IKAI
IPC分类号： H04N19/44 , H04N19/159 , H04N19/186 , H04N19/176 , H04N19/46
摘要： A method of decoding a picture from a bitstream by an electronic device is provided. A block size of a block unit in the picture is determined. The block size of the block unit is compared to a predetermined size. When the block size of the block unit is greater than the predetermined size, a prediction mode of the block unit is determined by parsing a prediction mode flag of the block unit from the bitstream. When the block size of the block unit is equal to the predetermined size, the prediction mode of the block unit is determined without parsing the prediction mode flag of the block unit. The block unit is decoded based on the prediction mode.
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公开(公告)号：US20210392344A1
公开(公告)日：2021-12-16
申请号：US17419416
申请日：2019-12-26
发明人： FRANK BOSSEN , EIICHI SASAKI , YUKINOBU YASUGI , TOMOHIRO IKAI
IPC分类号： H04N19/186 , H04N19/105 , H04N19/174 , H04N19/96
摘要： A prediction image generation is provided. First and second luminance values corresponding, respectively, to first and second positions on a luminance image are derived. First and second chrominance values corresponding, respectively, to first and second positions on a chrominance image are derived. First and second difference values indicate, respectively, a first difference between the first and second luminance values and a second difference between the first and second chrominance values. A shift value is derived for a shift operation and a first parameter is derived by using the first and second difference values, and a second parameter is derived by using the second luminance value, the second chrominance value, the first parameter, and the shift value according to a formula. The shift value is set to a first threshold if a value derived by using the first and second difference values is less than the first threshold.
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