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公开(公告)号：US20190037231A1
公开(公告)日：2019-01-31
申请号：US16073508
申请日：2017-01-11
发明人： TOMOHIRO IKAI , TOMOYUKI YAMAMOTO
IPC分类号： H04N19/513
CPC分类号： H04N19/513 , H04N19/52 , H04N19/70
摘要： At least one of a vector candidate derivation unit and a merge candidate derivation unit derives a motion vector of each of multiple sub-blocks contained in a decoding target block by referring to motion vectors at multiple control points including two points at an interval which is longer than one side of the target block, and a prediction image generation unit refers to the motion vector of each sub-block to generate a prediction image.
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公开(公告)号：US20240205407A1
公开(公告)日：2024-06-20
申请号：US18116853
申请日：2023-03-03
发明人： YASUAKI TOKUMO , Keiichiro TAKADA , TOMOHIRO IKAI , TAKESHI CHUJOH , TOMOKO AONO
IPC分类号： H04N19/13 , H04N19/137 , H04N19/196
CPC分类号： H04N19/13 , H04N19/137 , H04N19/197
摘要： A 3D data decoding apparatus for decoding coded data. The 3D data decoding apparatus includes an arithmetic decoder configured to arithmetically decode mesh displacement from the coded data, a context selection unit configured to select a context in the arithmetic decoding, and a context initialization unit configured to set an initial value of the context. In the context initialization unit, a context initialization parameter for initializing the context is decoded from the coded data.
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公开(公告)号：US20240107040A1
公开(公告)日：2024-03-28
申请号：US18094815
申请日：2023-01-09
发明人： TAKESHI CHUJOH , TOMOHIRO IKAI , YUKINOBU YASUGI , YASUAKI TOKUMO , TOMOKO AONO , Keiichiro TAKADA
IPC分类号： H04N19/30 , H04N19/172 , H04N19/46
CPC分类号： H04N19/30 , H04N19/172 , H04N19/46
摘要： Object
In the existing specifications for neural network post-filter characteristics SEI, in order to perform post-filtering processing, the SEI needs to be transmitted for each picture, which presents a problem of redundancy in a case that the same post-filtering processing is performed in all of pictures.
Solution
A video decoding apparatus according to an aspect of the present invention includes an image decoding apparatus configured to decode coded data and generate a decoded image, an inverse conversion information decoding apparatus configured to decode inverse conversion information as supplemental enhancement information on a per sequence basis, and a resolution inverse conversion apparatus configured to conversion the decoded image to an image with an indicated resolution by using the inverse conversion information, the resolution inverse conversion apparatus using a neural network. The video decoding apparatus decodes information as to whether to apply resolution inverse conversion processing using the inverse conversion information on a per sequence basis or on a per picture basis.-
公开(公告)号：US20240107003A1
公开(公告)日：2024-03-28
申请号：US18094833
申请日：2023-01-09
发明人： TOMOHIRO IKAI , YUKINOBU YASUGI , TOMOKO AONO , Zheming FAN
IPC分类号： H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/46
CPC分类号： H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/46
摘要： Object
Known derivation, on a per intra prediction modes basis, of a template-based intra mode derivation based on a difference between a template prediction image and a template image has a problem that derivation of the template image and cost calculation require great computational resources.
Solution
Included are an intra prediction image generation unit configured to generate a template prediction image for an intra prediction mode candidate predetermined, a template cost derivation unit configured to derive a cost from the template prediction image and a template image corresponding to an image near a target block, and an intra prediction image generation unit configured to generate an intra prediction image by using a selected intra prediction mode, wherein the number of taps of an interpolation filter for the template prediction image is less than the number of taps of an interpolation filter for intra prediction.-
公开(公告)号：US20240098272A1
公开(公告)日：2024-03-21
申请号：US18104793
申请日：2023-02-02
发明人： YUKINOBU YASUGI , TOMOHIRO IKAI , TOMOKO AONO
IPC分类号： H04N19/14 , H04N19/105 , H04N19/159 , H04N19/176
CPC分类号： H04N19/14 , H04N19/105 , H04N19/159 , H04N19/176
摘要： Object
A video coding and decoding apparatus that can enhance coding efficiency is provided.
Solution
A video decoding apparatus includes an OOB determination unit configured to determine whether a reference block is a target of OOB processing by comparing coordinates of the reference block with coordinates of a picture, and an OOB mask derivation unit configured to derive mask data indicating whether a pixel is available by comparing coordinates of the pixel included in the reference block with the coordinates of the picture. The OOB determination unit determines whether the reference block is the target of the OOB processing based on presence or absence of processing to be applied to a reference picture including the reference block.-
公开(公告)号：US20230199181A1
公开(公告)日：2023-06-22
申请号：US18109232
申请日：2023-02-13
发明人： YUKINOBU YASUGI , EIICHI SASAKI , TOMOHIRO IKAI
IPC分类号： H04N19/117 , H04N19/184 , H04N19/186 , H04N19/176
CPC分类号： H04N19/117 , H04N19/184 , H04N19/186 , H04N19/176
摘要： An image decoding apparatus includes: a first filter unit configured to apply a first filter to an image (a luminance image and a chrominance image); a second filter unit configured to apply a second filter to an output image of the first filter; a filter set derivation unit configured to decode a filter coefficient from coded data; and a third filter unit configured to apply a third filter to an output image of the second filter by using the filter coefficient. In a case that the third filter unit performs filter processing for the luminance image by using a luminance output image of the second filter, the third filter unit performs processing of clipping an amount of change of a pixel value through the filter processing within a prescribed range of value.
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公开(公告)号：US20230085680A1
公开(公告)日：2023-03-23
申请号：US18072182
申请日：2022-11-30
发明人： TAKESHI CHUJOH , TOMOHIRO IKAI , TOMOKO AONO , EIICHI SASAKI , YUKINOBU YASUGI , TOMONORI HASHIMOTO , TIANYANG ZHOU
IPC分类号： H04N19/105 , H04N19/176 , H04N19/70 , H04N19/513 , H04N19/593 , H04N19/174 , H04N19/172
摘要： An adaptive motion vector prediction unit configured to adaptively perform spatial prediction that performs prediction using a motion vector around a target block and temporal prediction that performs prediction using a motion vector of a collocated picture is included, and in the temporal prediction performed by the adaptive motion vector prediction unit, the collocated picture to be referred to is designated on a per picture basis, and a reference list is designated on a per slice basis.
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公开(公告)号：US20210409745A1
公开(公告)日：2021-12-30
申请号：US17472398
申请日：2021-09-10
发明人： TOMOHIRO IKAI , Tomoko Aono
IPC分类号： H04N19/44 , H04N19/119 , H04N19/176 , H04N19/186 , H04N19/46 , H04N19/96
摘要： In a case that luminance information is used for a chrominance prediction in a separate coding tree structure, there is a problem that chrominance blocks cannot be decoded before all luminance blocks constituting a tree are decoded. An image decoding apparatus that splits an image into coding tree units (CTUs) that are rectangular for processing includes a CT information decoding unit configured to split a CTU of the CTUs into coding trees CTs and to process one or more color components as a single coding tree using one coding tree CT of the coding trees CTs or process two or more color components as a separate coding tree using two or more coding trees CTs of the coding trees CTs depending on a tree mode, a CU decoding unit configured to decode a split flag indicating whether to further split a CT of the CTs and to recursively perform block splitting, and an intra predictor configured to use a decoded image of one color component to generate a prediction image of another color component. The CU decoding unit does not decode the split flag from coded data but configures 1 in the split flag in a case of an intra slice, the separate coding tree, and a target CT size being larger than a prescribed maximum intra size.
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公开(公告)号：US20210144395A1
公开(公告)日：2021-05-13
申请号：US17100099
申请日：2020-11-20
发明人： YOSHIYA YAMAMOTO , YUKINOBU YASUGI , TOMOHIRO IKAI , TOMOKO AONO
IPC分类号： H04N19/44 , H04N19/136 , H04N19/176 , H04N19/70 , H04N19/119 , H04N19/157 , H04N19/96
摘要： 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.
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公开(公告)号：US20210067774A1
公开(公告)日：2021-03-04
申请号：US16998480
申请日：2020-08-20
发明人： YUKINOBU YASUGI , EIICHI SASAKI , TOMOHIRO IKAI
IPC分类号： H04N19/117 , H04N19/176 , H04N19/186 , H04N19/184
摘要： An image decoding apparatus includes: a first filter unit configured to apply a first filter to an image (a luminance image and a chrominance image); a second filter unit configured to apply a second filter to an output image of the first filter; a filter set derivation unit configured to decode a filter coefficient from coded data; and a third filter unit configured to apply a third filter to an output image of the second filter by using the filter coefficient. In a case that the third filter unit performs filter processing for the luminance image by using a luminance output image of the second filter, the third filter unit performs processing of clipping an amount of change of a pixel value through the filter processing within a prescribed range of value.
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