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11.发明公开
公开(公告)号：EP3893507A1
公开(公告)日：2021-10-13
申请号：EP19891983.9
申请日：2019-12-03
发明人： YASUGI, Yukinobu , IKAI, Tomohiro
IPC分类号： H04N19/50
摘要： The present invention includes: a CCLM prediction derivation portion, for deriving a first parameter and a second parameter by using a sampled luminance value downsampled according to a chrominance format and an intra-frame prediction mode; and a CCLM prediction filter portion, for deriving a prediction image by using the first parameter and the second parameter, wherein the CCLM prediction derivation portion derives the first parameter by using a luminance difference value and a chrominance difference value, and derives the second parameter by using the first parameter.
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公开(公告)号：EP3796659A1
公开(公告)日：2021-03-24
申请号：EP19802509.0
申请日：2019-05-13
摘要： Coded data corresponding to a partial area is easily generated from coded data of an entire picture. An entropy encoding unit (513) that generates output coded data from input coded data is provided. The input coded data includes image data for a subpicture acquired by dividing a picture and a subpicture header including subpicture identification information generated on a per subpicture basis. The output coded data includes a subpicture parameter set including one or plurality of pieces of subpicture identification information, a subpicture header, and image data for the subpicture.
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公开(公告)号：EP3937498A1
公开(公告)日：2022-01-12
申请号：EP20770371.1
申请日：2020-03-06
IPC分类号： H04N19/577 , H04N19/70
摘要： An image decoding apparatus and an image coding apparatus that reduce complexity of high image quality processing are implemented. The image decoding apparatus includes an inter prediction parameter decoding processing unit that includes processing of, regarding two motion vectors, modifying the two motion vectors from an error of two prediction images. In a case that neither of the two prediction images is a case of weighted prediction, the processing of modifying the two motion vectors is performed.
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公开(公告)号：EP3910954A1
公开(公告)日：2021-11-17
申请号：EP21183211.8
申请日：2017-08-07
IPC分类号： H04N19/463 , H04N19/593 , H04N19/70 , H04N19/105 , H04N19/11 , H04N19/176 , H04N19/96
摘要： An image decoding apparatus for using a binary tree division in addition to a quad tree division when dividing a picture includes an intra prediction parameter decoding control unit and a prediction image generation unit. The intra prediction parameter decoding control unit changes a first association between a plurality of prediction directions and a plurality of mode indices in an intra prediction mode into a second association based on a shape of a block. The prediction image generation unit generates a prediction image by the mode indices and the second association. The intra prediction parameter decoding control unit changes a number of first portions of the prediction directions based on the shape to generate a plurality of changed prediction directions for determining the second association based on the changed prediction directions. The prediction directions directed toward a first direction region are the first portions of the prediction directions.
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15.发明公开
公开(公告)号：EP3908003A1
公开(公告)日：2021-11-10
申请号：EP19907823.9
申请日：2019-12-26
IPC分类号： H04N19/593
摘要： The present invention reduces the amount of storage required for CCLM prediction. A CCLM prediction parameter derivation portion (310442) derives a scale shift value corresponding to a luminance difference value, and uses the scale shift value to shift a value acquired by multiplying a value of a table by a chrominance difference value, thereby deriving CCLM prediction parameters. The value of the table refers to, as an index, a value acquired by right-shifting the luminance difference value by the scale shift value. Further, during derivation of a prediction image, a bit width is reduced by adaptively deriving the amount of shift of a linear prediction parameter from the chrominance difference value.
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16.发明公开
公开(公告)号：EP3902261A1
公开(公告)日：2021-10-27
申请号：EP19898118.5
申请日：2019-12-17
发明人： YASUGI, Yukinobu , SASAKI, Eiichi , IKAI, Tomohiro , AONO, Tomoko
IPC分类号： H04N19/593
摘要： The amount of memory required for CCLM prediction is reduced. The CCLM prediction parameter derivation unit (310442) derives a scale shift value corresponding to a luma difference value, and derives a CCLM prediction parameter, by shifting, by using the scale shift value, a value obtained by multiplying a value of a table referred to with a value obtained by performing right shift of the luma difference value by the scale shift value as an index and a chroma difference value. In addition, in a case of deriving a prediction image, a bit width is reduced by adaptively deriving a shift amount of a linear prediction parameter from the chroma difference value.
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公开(公告)号：EP3806471A1
公开(公告)日：2021-04-14
申请号：EP19812024.8
申请日：2019-05-30
发明人： IKAI, Tomohiro , YASUGI, Yukinobu
IPC分类号： H04N19/436 , H04N19/593
摘要： Delay based on WPP processing is reduced. An image decoding apparatus (31) includes: a prediction image generation unit (308) by using decoded data from a first position to a second position, the first position being, in a CTU row immediately above a CTU row including a target CTU, identical to a position of the target CTU, the second position being a position one CTU forward relative to the first position; and an entropy decoding unit (301) that performs decoding of the target CTU by using the decoded data from the first position to the second position, the first position being, in the CTU row immediately above the CTU row including the target CTU, identical to the position of the target CTU, the second position being a position one CTU forward relative to the first position.
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18.发明公开
公开(公告)号：EP3506638A1
公开(公告)日：2019-07-03
申请号：EP17843381.9
申请日：2017-08-07
IPC分类号： H04N19/463 , H04N19/593 , H04N19/70
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：EP4395325A1
公开(公告)日：2024-07-03
申请号：EP23218955.5
申请日：2023-12-21
IPC分类号： H04N19/70 , H04N19/117 , H04N19/172
CPC分类号： H04N19/70 , H04N19/117 , H04N19/172
摘要： - Use of only supplemental enhancement information of a deep learning post-filter cannot adjust a filter strength in a case that each frame has a different image feature, thus reducing image quality improvement performance.
- A decoding apparatus for decoding coded data includes a header decoder that decodes supplemental enhancement information of a deep learning post-filter from the coded data, an attribute image decoder that decodes an attribute image from the coded data, and an attribute image filter unit that performs filtering processing of the attribute image, wherein the header decoder decodes objective information indicating that the attribute image filter unit is to perform filtering processing on the attribute image.-
20.发明公开
公开(公告)号：EP4131967A1
公开(公告)日：2023-02-08
申请号：EP21781727.9
申请日：2021-03-26
发明人： CHUJOH, Takeshi , IKAI, Tomohiro , AONO, Tomoko , SASAKI, Eiichi , HASHIMOTO, Tomonori , ZHOU, Tianyang , YASUGI, Yukinobu
IPC分类号： H04N19/70
摘要： A video decoding apparatus is a video decoding apparatus for deriving a prediction image by using a reference picture included in a reference picture list. The video decoding apparatus includes: a parameter decoder configured to decode (i) one or more reference picture list structures, and (ii) a first flag indicating whether first reference picture list information is present in a slice header whose nal_unit_type is an IDR picture, the one or more reference picture list structures and the first flag being included in a sequence parameter set, and a second flag indicating whether or not second reference picture list information is present in a picture header, the second flag being included in a picture parameter set; and a prediction parameter derivation unit configured to (i) derive the first reference picture list information by using nal_unit_type or the first flag and the second flag in the slice header, or derive the second reference picture list information by using the second flag in the picture header, and (ii) derive the reference picture list, based on the one or more reference picture list structures. In a case that the first reference picture list is not derived, the number of entries of the one or more reference picture list structures is estimated to be 0.
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