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公开(公告)号：US11716470B2
公开(公告)日：2023-08-01
申请号：US17583768
申请日：2022-01-25
Inventor： Chong Soon Lim , Hai Wei Sun , Jing Ya Li , Han Boon Teo , Che-Wei Kuo , Chu Tong Wang , Kiyofumi Abe , Takahiro Nishi , Tadamasa Toma , Yusuke Kato
IPC: H04N19/117 , H04N19/132 , H04N19/169 , H04N19/82
CPC classification number: H04N19/117 , H04N19/132 , H04N19/188 , H04N19/82
Abstract: An encoder includes circuitry and memory coupled to the circuitry. In operation, the circuitry: encodes information for deriving a parameter into a header of a bitstream; filters reconstructed samples in a first image using a filtering process, to generate a second image; determines whether the parameter has a predefined value; encodes a third image using the second image when the parameter has the predefined value; and encodes the third image using the first image when the parameter does not have the predefined value.
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公开(公告)号：US11528508B2
公开(公告)日：2022-12-13
申请号：US17589393
申请日：2022-01-31
Inventor： Chu Tong Wang , Chong Soon Lim , Han Boon Teo , Hai Wei Sun , Jing Ya Li , Che-Wei Kuo , Tadamasa Toma , Takahiro Nishi , Kiyofumi Abe , Yusuke Kato
IPC: H04N19/82 , H04N19/117 , H04N19/132 , H04N19/167 , H04N19/17 , H04N19/186
Abstract: An encoder includes circuitry and memory coupled to the circuitry. The circuitry, in response to a first reconstructed image sample being located outside a virtual boundary, duplicates a reconstructed sample located inside and adjacent to the virtual boundary to generate the first reconstructed image sample. The circuitry generates a first coefficient value by applying a CCALF (cross component adaptive loop filtering) process to the first reconstructed image sample of a luma component. The circuitry generates a second coefficient value by applying an ALF (adaptive loop filtering) process to a second reconstructed image sample of a chroma component. The circuitry generates a third coefficient value by adding the first coefficient value to the second coefficient value, and encodes a third reconstructed image sample of the chroma component using the third coefficient value.
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公开(公告)号：US11503318B2
公开(公告)日：2022-11-15
申请号：US17388694
申请日：2021-07-29
Inventor： Che-Wei Kuo , Chong Soon Lim , Han Boon Teo , Jing Ya Li , Hai Wei Sun , Chu Tong Wang , Tadamasa Toma , Takahiro Nishi , Kiyofumi Abe , Yusuke Kato
IPC: H04N19/00 , H04N19/44 , H04N19/105 , H04N19/117 , H04N19/13 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/46
Abstract: A decoder includes circuitry which, in operation, parses a first flag indicating whether a CCALF (cross component adaptive loop filtering) process is enabled for a first block located adjacent to a left side of a current block; parses a second flag indicating whether the CCALF process is enabled for a second block located adjacent to an upper side of the current block; determines a first index associated with a color component of the current block; and derives a second index indicating a context model, using the first flag, the second flag, and the first index. The circuitry, in operation, performs entropy decoding of a third flag indicating whether the CCALF process is enabled for the current block, using the context model indicated by the second index; and performs the CCALF process on the current block in response to the third flag indicating the CCALF process is enabled for the current block.
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公开(公告)号：US11350111B2
公开(公告)日：2022-05-31
申请号：US17196194
申请日：2021-03-09
Inventor： Jing Ya Li , Ru Ling Liao , Chong Soon Lim , Han Boon Teo , Hai Wei Sun , Kiyofumi Abe , Takahiro Nishi , Tadamasa Toma
IPC: H04N19/159 , H04N19/117 , H04N19/182
Abstract: An encoder includes circuitry and memory connected to the circuitry. The circuitry: derives an absolute value of a sum of gradient values in first and second ranges; derives, as a first parameter, a total sum of absolute values of sums of gradient values derived respectively for pairs of relative pixel positions; derives a pixel difference value between pixel values in the first and second ranges; inverts or maintains a plus or minus sign of the pixel difference value, according to a plus or minus sign of the sum of the gradient values indicating the sum of the gradient values in the first and second ranges; derives, as a second parameter, a total sum of pixel difference values each having the plus or minus sign inverted or maintained, the pixel difference values derived respectively for the relative pixel positions; and generates a prediction image using the first and second parameters.
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公开(公告)号：US11044491B2
公开(公告)日：2021-06-22
申请号：US16942601
申请日：2020-07-29
Inventor： Kiyofumi Abe , Takahiro Nishi , Tadamasa Toma , Ryuichi Kanoh , Chong Soon Lim , Ru Ling Liao , Hai Wei Sun , Sughosh Pavan Shashidhar , Han Boon Teo , Jing Ya Li
IPC: H04N11/02 , H04N19/52 , H04N19/119 , H04N19/176
Abstract: Provided is an encoder which includes circuitry and memory. Using the memory, the circuitry splits an image block into a plurality of partitions, obtains a prediction image for a partition, and encodes the image block using the prediction image. When the partition is not a non-rectangular partition, the circuitry obtains (i) a first prediction image for the partition using a first motion vector for the partition, (ii) a second motion vector for the partition using the first prediction image, and (iii) a second prediction image for the partition as the prediction image using the second motion vector. When the partition is a non-rectangular partition, the circuitry obtains the first prediction image as the prediction image using the first motion vector, without using the second motion vector.
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Patent Agency Ranking
公开(公告)号：US11044476B2
公开(公告)日：2021-06-22
申请号：US17087128
申请日：2020-11-02
Inventor： Tadamasa Toma , Takahiro Nishi , Kiyofumi Abe , Ryuichi Kanoh , Chong Soon Lim , Sughosh Pavan Shashidhar , Ru Ling Liao , Hai Wei Sun , Han Boon Teo , Jing Ya Li
IPC: H04N19/96 , H04N19/176 , H04N19/119 , H04N19/157
Abstract: An encoder partitions into blocks using a set of block partition modes. The set of block partition modes includes a first partition mode for partitioning a first block, and a second block partition mode for partitioning a second block which is one of blocks obtained after the first block is partitioned. When the number of partitions of the first block partition mode is three, the second block is a center block among the blocks obtained after partitioning the first block, and the partition direction of the second block partition mode is same as the partition direction of the first block partition mode, the second block partition mode indicates that the number of partitions is only three. A parameter for identifying the second block partition mode includes a first flag indicating a horizontal or vertical partition direction, and does not include a second flag indicating the number of partitions.
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27.发明申请公开(公告)号：US20250150613A1
公开(公告)日：2025-05-08
申请号：US19011862
申请日：2025-01-07
Inventor： Jingying Gao , Han Boon Teo , Chong Soon Lim , Praveen Kumar Yadav , Kiyofumi Abe , Takahiro Nishi , Tadamasa Toma
IPC: H04N19/463 , H04N19/39 , H04N19/70
Abstract: An image decoder includes circuitry and a memory connected to the circuitry. In operation, the circuitry decodes a first bitstream to acquire a first image, decodes a second bitstream to acquire specification information specifying a particular region in the first image and a second image containing image data for the particular region, and generates a third image based on the first image, the specification information, and the second image.
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公开(公告)号：US20250133219A1
公开(公告)日：2025-04-24
申请号：US18999243
申请日：2024-12-23
Inventor： Kiyofumi ABE , Takahiro Nishi , Tadamasa Toma , Ryuichi Kanoh , Chong Soon Lim , Ru Ling Liao , Hai Wei Sun , Sughosh Pavan Shashidhar , Han Boon Teo , Jing Ya Li
IPC: H04N19/159 , H04N19/119 , H04N19/139 , H04N19/513
Abstract: An encoder encodes a video, and includes: circuitry; and memory coupled to the circuitry. Using the memory, the circuitry: obtains at least two items of prediction information for a first partition included in the video; derives at least one template from neighboring samples which neighbor the first partition; calculates at least two costs, using the at least one template and the at least two items of prediction information; using the at least two costs, (i) determines at least one splitting direction for the first partition or (ii) assigns one of the at least two items of prediction information to a second partition split from the first partition according to the splitting direction, and another thereof to a third partition split from the first partition according to the splitting direction; and encodes the first partition according to the splitting direction and the at least two items of prediction information.
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公开(公告)号：US12262010B2
公开(公告)日：2025-03-25
申请号：US18365054
申请日：2023-08-03
Inventor： Chong Soon Lim , Hai Wei Sun , Sughosh Pavan Shashidhar , Han Boon Teo , Ru Ling Liao , Takahiro Nishi , Tadamasa Toma
IPC: H04N19/119 , H04N19/176 , H04N19/50 , H04N19/60
Abstract: An encoder according to one aspect of the present disclosure encodes a block of an image, and includes a processor and memory connected to the processor. Using the memory, the processor partitions a block into a plurality of sub blocks and encodes a sub block included in the plurality of sub blocks in an encoding process including at least a transform process or a prediction process. The block is partitioned using a multiple partition including at least three odd-numbered child nodes and each of a width and a height of each of the plurality of sub blocks is a power of two.
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公开(公告)号：US12206890B2
公开(公告)日：2025-01-21
申请号：US18433707
申请日：2024-02-06
Inventor： Chong Soon Lim , Hai Wei Sun , Sughosh Pavan Shashidhar , Han Boon Teo , Ru Ling Liao , Jing Ya Li , Tadamasa Toma , Takahiro Nishi , Kiyofumi Abe , Ryuichi Kanoh
IPC: H04N19/52
Abstract: An encoder which includes circuitry and memory. Using the memory, the circuitry generates a list which includes candidates for a first motion vector for a first partition. The list has a maximum list size and an order of the candidates, and at least one of the maximum list size or the order of the candidates is dependent on at least one of a partition size or a partition shape of the first partition. The circuitry selects the first motion vector from the candidates included in the list; encodes an index indicating the first motion vector among the candidates in the list into the bitstream based on the maximum list size; and generates the predicted image for the first partition using the first motion vector.
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