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公开(公告)号：US11539968B2
公开(公告)日：2022-12-27
申请号：US17271201
申请日：2019-08-22
发明人： Takeshi Chujoh , Yukinobu Yasugi , Eiichi Sasaki , Tomoko Aono , Tomohiro Ikai
IPC分类号： H04N19/169 , H04N19/107 , H04N19/172 , H04N19/70 , H04N19/167 , H04N19/82
摘要： A mechanism is provided that implements video coding and decoding such that only a specific partial image region on a screen can be independently decoded. A video decoding apparatus (31) according to an aspect of the present invention configures, in intra prediction, inter prediction, loop filter processing, or the like, a partial image region in a picture, handles a region outside the partial image region in a similar manner to a region outside the picture, and does not apply such restriction to a non-partial image region other than the partial image region in the picture.
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公开(公告)号：US11412243B2
公开(公告)日：2022-08-09
申请号：US17299812
申请日：2019-12-03
IPC分类号： H04N19/44 , H04N19/52 , H04N19/105 , H04N19/139 , H04N19/172 , H04N19/109 , H04N19/70
摘要： An image decoding apparatus is implemented that can suppress a decrease in coding efficiency in a case that a high compression rate is achieved. The image decoding apparatus includes a parameter decoder, and the parameter decoder decodes a skip flag indicating whether a skip mode is applied, and in a case that the skip flag does not indicate the skip mode, decodes a merge flag indicating whether a merge mode is applied, and in a case that the merge flag does not indicate the merge mode, decodes an MMVD flag indicating whether an MMVD mode is applied.
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公开(公告)号：US20210274187A1
公开(公告)日：2021-09-02
申请号：US17326024
申请日：2021-05-20
发明人： Tomoko Aono , Tomohiro Ikai , Takeshi Chujoh
IPC分类号： H04N19/132 , H04N19/105 , H04N19/117 , H04N19/176 , H04N19/186
摘要： A prediction image generation method is provided. The method derives a down-sampled luminance image and a down-sampled neighboring luminance image by down-sampling the luminance image of a target block and a neighboring luminance image based on information related to a down-sampling and indicating one of a plurality of position relationships between at least one luma pixel and a chroma pixel. The method derives a neighboring chrominance image, parameters derived from the down-sampled neighboring luminance image and the neighboring chrominance image, and the prediction image by using the down-sampled luminance image and the parameters. The position relationships include that a position of the chroma pixel is identical to a position of one of the at least one luma pixel and that the position of the chroma pixel is located in an intermediate of two of the at least one luma pixel on a left side of a 2×2 luma pixel block.
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4.发明授权公开(公告)号：US11070801B2
公开(公告)日：2021-07-20
申请号：US16469673
申请日：2017-12-13
发明人： Yukinobu Yasugi , Tomoko Aono , Tomohiro Ikai
IPC分类号： H04N19/119 , H04N19/176 , H04N19/96
摘要： Complexity of coding/decoding of a video is reduced. An image decoding apparatus (31) includes a CN information decoder (10) configured to hierarchically split a coding node by at least any of binary tree split and ternary tree split. The CN information decoder refers to a method of splitting an immediately higher node, which is a node one generation higher than a target node, to restrict a method of splitting the target node.
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公开(公告)号：US20240114155A1
公开(公告)日：2024-04-04
申请号：US18532042
申请日：2023-12-07
发明人： TAKESHI CHUJOH , Yukinobu Yasugi , Eiichi Sasaki , Tomoko Aono , Tomohiro Ikai
IPC分类号： H04N19/169 , H04N19/107 , H04N19/172 , H04N19/70
CPC分类号： H04N19/188 , H04N19/107 , H04N19/172 , H04N19/70 , H04N19/167
摘要： A method for signaling gradual refresh for encoding a set of pictures performed by an electronic device is provided. The method identifies a first picture in the set of pictures as being associated with a gradual refreshed picture, and stores a network abstraction layer (NAL) unit type in a coded stream associated with the first picture. The NAL unit type identifies a presence of the gradual refreshed picture. The method then stores, in the coded stream, an enable flag to identify a use of the gradual refresh for encoding at least a subset of pictures in the set of pictures.
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公开(公告)号：US11671620B2
公开(公告)日：2023-06-06
申请号：US17544991
申请日：2021-12-08
发明人： Takeshi Chujoh , Tomoko Aono , Tomohiro Ikai , Eiichi Sasaki , Yukinobu Yasugi
IPC分类号： H04N19/52 , H04N19/56 , H04N19/176
CPC分类号： H04N19/52 , H04N19/176 , H04N19/56
摘要： A load in processing of searching for a motion vector is reduced. In order to solve the problem described above, a motion vector derivation apparatus according to one aspect of the present invention that derives a motion vector to be referred to for generating a prediction image to be used for coding or decoding of a video includes a motion vector search unit configured to search for a motion vector on a prediction unit basis through matching processing. The motion vector search unit is configured to stop search of the motion vector, depending on whether or not a conditional expression according to a pixel bit-depth is satisfied.
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公开(公告)号：US11212551B2
公开(公告)日：2021-12-28
申请号：US16960108
申请日：2019-01-08
发明人： Takeshi Chujoh , Tomoko Aono , Tomohiro Ikai , Eiichi Sasaki , Yukinobu Yasugi
IPC分类号： H04N19/52 , H04N19/56 , H04N19/176
摘要： A load in processing of searching for a motion vector is reduced. In order to solve the problem described above, a motion vector derivation apparatus (3032, 3036 to 3038) according to one aspect of the present invention that derives a motion vector to be referred to for generating a prediction image to be used for coding or decoding of a video includes a motion vector search unit (30373) configured to search for a motion vector on a prediction unit basis through matching processing. The motion vector search unit (30373) is configured to stop search of the motion vector, depending on whether or not a conditional expression according to a pixel bit-depth is satisfied.
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公开(公告)号：US11653010B2
公开(公告)日：2023-05-16
申请号：US17416132
申请日：2019-12-20
发明人： Sachin G. Deshpande , Eiichi Sasaki , Takeshi Chujoh , Yukinobu Yasugi , Tomohiro Ikai , Tomoko Aono
IPC分类号： H04N19/436 , H04N19/119 , H04N19/167 , H04N19/174 , H04N19/96
CPC分类号： H04N19/436 , H04N19/119 , H04N19/167 , H04N19/174 , H04N19/96
摘要： In a moving image decoding device for decoding encoded data of a tile group splitting a picture into one or more rectangular regions and consisting of one or more segments, a WPP enabled flag for indicating whether a segment in an object tile group is a CTU row having a height of one CTU is decoded, and when the WPP enabled flag is 1, after a CTU at a right end of the CTU row is decoded, an end bit of a first segment having a fixed value is decoded.
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公开(公告)号：US11652991B2
公开(公告)日：2023-05-16
申请号：US17256617
申请日：2019-06-24
发明人： Yukinobu Yasugi , Tomohiro Ikai , Tomoko Aono
IPC分类号： H04N19/119 , H04N19/172 , H04N19/70 , H04N19/96
CPC分类号： H04N19/119 , H04N19/172 , H04N19/70 , H04N19/96
摘要： A video decoding apparatus (31) for splitting an image into tiles, splits a tile of the tiles into coding tree units (CTUs), and decodes a video on a per-CTU basis, the video decoding apparatus including a header decoder (3020) configured to decode tile unit information indicating a unit for a size of a tile from header information of a coding stream, and a coding tree (CT) decoder (3021) configured to split the tile into CTUs, wherein the header decoder derives a tile upper left position and a tile size by using the tile unit information.
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公开(公告)号：US20230041444A1
公开(公告)日：2023-02-09
申请号：US17974459
申请日：2022-10-26
发明人： Takeshi Chujoh , Yukinobu Yasugi , Eiichi Sasaki , Tomoko Aono , Tomohiro Ikai
IPC分类号： H04N19/169 , H04N19/107 , H04N19/172 , H04N19/70
摘要： A mechanism is provided that implements video coding and decoding such that only a specific partial image region on a screen can be independently decoded. A video decoding apparatus (31) according to an aspect of the present invention configures, in intra prediction, inter prediction, loop filter processing, or the like, a partial image region in a picture, handles a region outside the partial image region in a similar manner to a region outside the picture, and does not apply such restriction to a non-partial image region other than the partial image region in the picture.
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