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111.发明授权公开(公告)号：US11128871B2
公开(公告)日：2021-09-21
申请号：US16394225
申请日：2019-04-25
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 , H04N19/513 , H04N19/139 , H04N19/119
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：US11115671B2
公开(公告)日：2021-09-07
申请号：US17025629
申请日：2020-09-18
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：US20210051323A1
公开(公告)日：2021-02-18
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: H04N19/119 , H04N19/176 , 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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公开(公告)号：US12262038B2
公开(公告)日：2025-03-25
申请号：US18419347
申请日：2024-01-22
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 , H04N19/105 , H04N19/117 , H04N19/13 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/44 , 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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115.发明授权公开(公告)号：US12250384B2
公开(公告)日：2025-03-11
申请号：US18234504
申请日：2023-08-16
Inventor： Jing Ya Li , Ru Ling Liao , Chong Soon Lim , Han Boon Teo , Hai Wei Sun , Kiyofumi Abe , Takahiro Nishi , Tadamasa Toma
IPC: H04N19/117 , H04N19/159 , 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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Patent Agency Ranking
公开(公告)号：US12200243B2
公开(公告)日：2025-01-14
申请号：US18241479
申请日：2023-09-01
Inventor： Jing Ya Li , Chong Soon Lim , Ru Ling Liao , Hai Wei Sun , Han Boon Teo , Kiyofumi Abe , Tadamasa Toma , Takahiro Nishi
IPC: H04N19/513 , H04N19/433
Abstract: An encoder includes: circuitry; and memory coupled to the circuitry. In operation, the circuitry: derives a base motion vector to be used in predicting a current block to be encoded; derives a first motion vector different from the base motion vector; derives a motion vector difference based on a difference between the base motion vector and the first motion vector; determines whether the motion vector difference is greater than a threshold; modifies the first motion vector when the motion vector difference is determined to be greater than the threshold, and does not modify the first motion vector when the motion vector difference is determined not to be greater than the threshold; and encodes the current block using the first motion vector modified or the first motion vector not modified.
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公开(公告)号：US12137207B2
公开(公告)日：2024-11-05
申请号：US17947733
申请日：2022-09-19
Inventor： Ru Ling Liao , Chong Soon Lim , Hai Wei Sun , Han Boon Teo , Jing Ya Li , Sughosh Pavan Shashidhar , Kiyofumi Abe , Takahiro Nishi , Tadamasa Toma
IPC: H04N19/105 , H04N19/159 , H04N19/176 , H04N19/46
Abstract: An encoder includes: circuitry; and memory coupled to the circuitry. The circuitry, in operation, stores a first parameter into a bitstream, the first parameter indicating, as a prediction mode, one of (i) a multiple prediction mode in which a prediction image is generated by overlapping an inter prediction image of a current block and an intra prediction image of the current block and (ii) one of a plurality of prediction modes including a non-rectangular mode in which a prediction image is generated for each non-rectangular partition in the current block, and encodes the current block according to the prediction mode.
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公开(公告)号：US12120291B2
公开(公告)日：2024-10-15
申请号：US17944866
申请日：2022-09-14
Inventor： Ru Ling Liao , Chong Soon Lim , Hai Wei Sun , Han Boon Teo , Jing Ya Li , Sughosh Pavan Shashidhar , Kiyofumi Abe , Takahiro Nishi , Tadamasa Toma
IPC: H04N19/105 , H04N19/159 , H04N19/176 , H04N19/46
CPC classification number: H04N19/105 , H04N19/159 , H04N19/176 , H04N19/46
Abstract: An encoder includes: circuitry; and memory coupled to the circuitry. The circuitry, in operation, stores a first parameter into a bitstream, the first parameter indicating, as a prediction mode, one of (i) a multiple prediction mode in which a prediction image is generated by overlapping an inter prediction image of a current block and an intra prediction image of the current block and (ii) one of a plurality of prediction modes including a non-rectangular mode in which a prediction image is generated for each non-rectangular partition in the current block, and encodes the current block according to the prediction mode.
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119.发明授权公开(公告)号：US12081749B2
公开(公告)日：2024-09-03
申请号：US18142166
申请日：2023-05-02
Inventor： Chong Soon Lim , Hai Wei Sun , Han Boon Teo , Jing Ya Li , Che-Wei Kuo , Kiyofumi Abe , Tadamasa Toma , Takahiro Nishi , Yusuke Kato
IPC: H04N19/117 , H04N19/176 , H04N19/51 , H04N19/80
CPC classification number: H04N19/117 , H04N19/176 , H04N19/51 , H04N19/80
Abstract: An encoder that encodes a current block to be encoded in an image is provided. The encoder includes: processor; and memory coupled to the processor, in which, in operation, the processor: generates a first prediction image based on a motion vector, the first prediction image being an image with full-pel precision; generates a second prediction image using an interpolation filter by interpolating a value at a fractional-pel position between full-pel positions included in the first prediction image; and encodes the current block based on the second prediction image, and in the using of the interpolation filter, the interpolation filter is switched between a first interpolation filter and a second interpolation filter differing in a total number of taps from the first interpolation filter.
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公开(公告)号：US12028519B2
公开(公告)日：2024-07-02
申请号：US18071370
申请日：2022-11-29
Inventor： Jing Ya Li , Chong Soon Lim , Hai Wei Sun , Han Boon Teo , Che Wei Kuo , Chu Tong Wang , Kiyofumi Abe , Takahiro Nishi , Tadamasa Toma , Yusuke Kato
IPC: H04N19/82 , H04N19/105 , H04N19/117 , H04N19/119 , H04N19/124 , H04N19/13 , H04N19/18 , H04N19/186
CPC classification number: H04N19/117 , H04N19/105 , H04N19/119 , H04N19/124 , H04N19/13 , H04N19/18 , H04N19/186 , H04N19/82
Abstract: An encoder includes circuitry and memory. The circuitry, in operation, generates a first coefficient value by applying a CCALF (cross component adaptive loop filtering) process to a 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. In the CCALF process, in response to a coordinate of the second reconstructed image sample being (x, y), coordinates of the first reconstructed image samples are (2x, 2y−1), (2x−1, 2y), (2x, 2y), (2x+1, 2y), (2x−1, 2y+1), (2x, 2y+1), (2x+1, 2y+1), and (2x, 2y+2).
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