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公开(公告)号：US11949914B2
公开(公告)日：2024-04-02
申请号：US18136818
申请日：2023-04-19
发明人： Tomonori Hashimoto , Eiichi Sasaki , Tomohiro Ikai , Tomoko Aono
IPC分类号： H04N19/60 , H04N19/132 , H04N19/176 , H04N19/70
CPC分类号： H04N19/60 , H04N19/132 , H04N19/176 , H04N19/70
摘要： An image decoding apparatus including a header decoder configured to decode, from coded data, a flag indicating whether dependent quantization is enabled and a flag prohibiting transform skip residual quantization, and a TU decoder configured to decode a transform coefficient in a TU block in an RRC mode in which a LAST position is coded, the LAST position corresponding to a decoding start position for the transform coefficient, or a TSRC mode in which the LAST position is not coded. The TU decoder performs dependent quantization in the RRC mode in a case that the transform coefficient for transform skip is decoded in the TSRC mode, and does not perform dependent quantization in the RRC mode in a case that the transform coefficient for transform skip is decoded in the RRC mode.
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公开(公告)号：US11722664B2
公开(公告)日：2023-08-08
申请号：US17340180
申请日：2021-06-07
发明人： Yukinobu Yasugi , Tomoko Aono , Tomohiro Ikai
IPC分类号： H04N19/119 , H04N19/176 , H04N19/96
CPC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：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：US20210400285A1
公开(公告)日：2021-12-23
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 , H04N19/172 , H04N19/70 , H04N19/107
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：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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7.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：US09641865B2
公开(公告)日：2017-05-02
申请号：US15334048
申请日：2016-10-25
发明人： Tomohiro Ikai , Yukinobu Yasugi , Tomoko Aono
IPC分类号： G06K9/40 , H04N19/61 , H04N19/117 , H04N19/44
CPC分类号： H04N19/61 , G06T5/00 , G06T5/002 , G06T5/003 , G06T5/20 , G06T2207/20012 , G06T2207/20192 , H04N19/117 , H04N19/44 , H04N19/80 , H04N19/82 , H04N19/86
摘要： An image filter (100) for calculating a pixel value of target pixel in an output image from a pixel value of each of a pixel or pixels belonging to a filter area in an input image by using a filter coefficient vector V, is configured to include a filter coefficient vector changing section (120) for changing the filter coefficient vector V according to at least either where the target area is in the input image, or where the target pixel is in the output image.
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公开(公告)号：US09514519B2
公开(公告)日：2016-12-06
申请号：US14697400
申请日：2015-04-27
发明人： Tomohiro Ikai , Yukinobu Yasugi , Tomoko Aono
IPC分类号： G06K9/40 , G06T5/00 , H04N19/61 , H04N19/117 , H04N19/82 , H04N19/86 , H04N19/44 , H04N19/80 , G06T5/20
CPC分类号： H04N19/61 , G06T5/00 , G06T5/002 , G06T5/003 , G06T5/20 , G06T2207/20012 , G06T2207/20192 , H04N19/117 , H04N19/44 , H04N19/80 , H04N19/82 , H04N19/86
摘要： An image filter (100) for calculating a pixel value of target pixel in an output image from a pixel value of each of a pixel or pixels belonging to a filter area in an input image by using a filter coefficient vector V, is configured to include a filter coefficient vector changing section (120) for changing the filter coefficient vector V according to at least either where the target area is in the input image, or where the target pixel is in the output image.
摘要翻译： 用于通过使用滤波器系数向量V从输入图像中的属于滤波器区域的像素或像素的像素的像素值计算输出图像中的目标像素的像素值的图像滤波器（100）被配置为包括 用于根据目标区域在输入图像中的至少一个或者目标像素在输出图像中的至少一个来改变滤波器系数矢量V的滤波器系数向量变化部分（120）。
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公开(公告)号：US12126819B2
公开(公告)日：2024-10-22
申请号：US18509398
申请日：2023-11-15
发明人： Tomoko Aono , Tomohiro Ikai
IPC分类号： H04N19/176 , H04N19/122 , H04N19/159 , H04N19/18 , H04N19/61
CPC分类号： H04N19/176 , H04N19/122 , H04N19/159 , H04N19/18 , H04N19/61
摘要： A device is provided with: a first transformer which transforms an coding unit (CU); and a second transformer which transforms a part of first transform coefficients output from the first transformer, wherein the second transformer transforms at least any of the first transform coefficients for a region (first region) having different sizes in a horizontal direction and a vertical direction or the first transform coefficients for a non-rectangular region (second region).
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