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公开(公告)号：US10856005B2
公开(公告)日：2020-12-01
申请号：US16816733
申请日：2020-03-12
Inventor： Takashi Hashimoto , Kiyofumi Abe , Tadamasa Toma , Takahiro Nishi , Ryuichi Kanoh
IPC: H04N19/52 , H04N19/159 , H04N19/182
Abstract: An encoder includes: circuitry; and memory, in which using the memory, the circuitry, in affine motion compensation prediction in inter prediction for a current block, places a limit on a range within which motion estimation or motion compensation is performed, and performs the motion compensation for the current block.
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公开(公告)号：US11671593B2
公开(公告)日：2023-06-06
申请号：US17488640
申请日：2021-09-29
Inventor： Ryuichi Kanoh , Tadamasa Toma , Takahiro Nishi , Kiyofumi Abe , Takashi Hashimoto
IPC: H04N19/117 , H04N19/14 , H04N19/176 , H04N19/196
CPC classification number: H04N19/117 , H04N19/14 , H04N19/176 , H04N19/196
Abstract: An encoder includes processing circuitry and memory. Using the memory, the processing circuitry: encodes and reconstructs an image to generate a reconstructed image; determines, according to a characteristic of a block in the reconstructed image, an interpolation method for interpolating pixels located outside a referable region including the block; interpolates the pixels located outside the referable region, using the interpolation method determined; and applies a filter to the block using the pixels interpolated.
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公开(公告)号：US20240340441A1
公开(公告)日：2024-10-10
申请号：US18748771
申请日：2024-06-20
Inventor： Takashi Hashimoto , Kiyofumi Abe , Tadamasa Toma , Takahiro Nishi , Ryuichi Kanoh
IPC: H04N19/52 , H04N19/159 , H04N19/182
CPC classification number: H04N19/52 , H04N19/159 , H04N19/182
Abstract: An encoder includes: circuitry; and memory, in which using the memory, the circuitry, in affine motion compensation prediction in inter prediction for a current block, places a limit on a range within which motion estimation or motion compensation is performed, and performs the motion compensation for the current block.
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公开(公告)号：US11240530B2
公开(公告)日：2022-02-01
申请号：US17081267
申请日：2020-10-27
Inventor： Takashi Hashimoto , Kiyofumi Abe , Tadamasa Toma , Takahiro Nishi , Ryuichi Kanoh
IPC: H04N19/52 , H04N19/159 , H04N19/182
Abstract: An encoder includes: circuitry; and memory, in which using the memory, the circuitry, in affine motion compensation prediction in inter prediction for a current block, places a limit on a range within which motion estimation or motion compensation is performed, and performs the motion compensation for the current block.
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公开(公告)号：US11153596B2
公开(公告)日：2021-10-19
申请号：US16696249
申请日：2019-11-26
Inventor： Ryuichi Kanoh , Tadamasa Toma , Takahiro Nishi , Kiyofumi Abe , Takashi Hashimoto
IPC: H04N19/52 , H04N19/105 , H04N19/159 , H04N19/176 , H04N19/186
Abstract: Provided is an encoder that achieves further improvement. The encoder includes processing circuitry and memory. Using the memory, the processing circuitry: obtains two prediction images from two reference pictures; derives a luminance gradient value of each pixel position in each of the two prediction images; derives a luminance local motion estimation value of each pixel position in a current block; generates a luminance final prediction image using a luminance value and the luminance gradient value in each of the two prediction images, and the luminance local motion estimation value of the current block; and generates a chrominance final prediction image using at least one of the luminance gradient value of each of the two prediction images or the luminance local motion estimation value of the current block, and chrominance of each of the two prediction images.
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Patent Agency Ranking
公开(公告)号：US11134260B2
公开(公告)日：2021-09-28
申请号：US16860367
申请日：2020-04-28
Inventor： Takashi Hashimoto , Kiyofumi Abe , Tadamasa Toma , Takahiro Nishi , Ryuichi Kanoh
IPC: H04N19/51 , H04N19/433
Abstract: An encoder that encodes a picture to generate a coded stream includes: circuitry and a memory coupled to the circuitry. The circuitry performs, using the memory: generating a prediction image of a current block included in a current picture by referring to a first region included in a reference picture different from the current picture; operating a bi-directional optical flow process to correct the prediction image by referring to a second region included in the first region, and not operating the bi-directional optical flow process in response to the second region not being included in the first region; and encoding the current block based on the prediction image.
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17.发明授权公开(公告)号：US10911770B2
公开(公告)日：2021-02-02
申请号：US16597356
申请日：2019-10-09
Inventor： Takashi Hashimoto , Takahiro Nishi , Tadamasa Toma , Kiyofumi Abe , Ryuichi Kanoh
IPC: H04N19/176 , H04N19/105 , H04N19/513
Abstract: A decoder that decodes a current block using a motion vector includes: a processor; and memory. Using the memory, the processor: derives a first candidate vector from one or more candidate vectors of one or more neighboring blocks that neighbor the current block; determines, in a first reference picture for the current block, a first adjacent region that includes a position indicated by the first candidate vector; calculates evaluation values of a plurality of candidate regions included in the first adjacent region; and determines a first motion vector of the current block, based on a first candidate region having a smallest evaluation value among the evaluation values. The first adjacent region is included in a first motion estimation region determined based on the position indicated by the first candidate vector.
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公开(公告)号：US12294735B2
公开(公告)日：2025-05-06
申请号：US18743382
申请日：2024-06-14
Inventor： Kiyofumi Abe , Takahiro Nishi , Tadamasa Toma , Ryuichi Kanoh , Takashi Hashimoto
IPC: H04N19/52 , H04N19/124 , H04N19/159 , H04N19/176
Abstract: An encoder includes circuitry and memory. Using the memory, the circuitry, in inter prediction processing: derives a first motion vector of a current block to be processed, using a motion vector of a previous block which has been previously processed; derives a second motion vector of the current block by performing motion estimation in the vicinity of the first motion vector; and generates a prediction image of the current block by performing motion compensation using the second motion vector.
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公开(公告)号：US11677975B2
公开(公告)日：2023-06-13
申请号：US17895189
申请日：2022-08-25
Inventor： Kiyofumi Abe , Takahiro Nishi , Tadamasa Toma , Ryuichi Kanoh , Takashi Hashimoto
IPC: H04N19/124 , H04N19/52 , H04N19/159 , H04N19/176
CPC classification number: H04N19/52 , H04N19/124 , H04N19/159 , H04N19/176
Abstract: An encoder includes circuitry and memory. Using the memory, the circuitry, in inter prediction processing: derives a first motion vector of a current block to be processed, using a motion vector of a previous block which has been previously processed; derives a second motion vector of the current block by performing motion estimation in the vicinity of the first motion vector; and generates a prediction image of the current block by performing motion compensation using the second motion vector.
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公开(公告)号：US11653018B2
公开(公告)日：2023-05-16
申请号：US17865659
申请日：2022-07-15
Inventor： Takashi Hashimoto , Takahiro Nishi , Tadamasa Toma , Kiyofumi Abe , Ryuichi Kanoh
IPC: H04N19/51 , H04N19/105 , H04N19/176 , H04N19/513
CPC classification number: H04N19/513 , H04N19/105 , H04N19/176
Abstract: A decoder that decodes a current block using a motion vector includes: a processor; and memory. Using the memory, the processor: derives a first candidate vector from one or more candidate vectors of one or more neighboring blocks that neighbor the current block; determines, in a first reference picture for the current block, a first adjacent region that includes a position indicated by the first candidate vector; calculates evaluation values of a plurality of candidate regions included in the first adjacent region; and determines a first motion vector of the current block, based on a first candidate region having a smallest evaluation value among the evaluation values. The first adjacent region is included in a first motion estimation region determined based on the position indicated by the first candidate vector.
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