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公开(公告)号：US11611758B2
公开(公告)日：2023-03-21
申请号：US16795408
申请日：2020-02-19
Inventor： Jing Ya Li , Chong Soon Lim , Han Boon Teo , Hai Wei Sun , Che Wei Kuo , Kiyofumi Abe , Takahiro NIshi , Tadamasa Toma , Yusuke Kato
IPC: G06V30/00 , H04N19/159 , H04N19/126 , H04N19/156 , H04N19/18 , H04N19/52 , H04N19/61
Abstract: An image encoder is provided including circuitry and a memory coupled to the circuitry. The circuitry, in operation, responds to a size of a block satisfying a size condition by generating a prediction image using a prediction mode selected from a plurality of prediction modes. The plurality of prediction modes include a first prediction mode in which a prediction process uses a motion vector and a reference block in a same picture as the block. The circuitry encodes the block using the prediction image.
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公开(公告)号：US11546591B2
公开(公告)日：2023-01-03
申请号：US17667871
申请日：2022-02-09
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 , H04N19/117 , H04N19/105 , H04N19/119 , H04N19/124 , H04N19/13 , H04N19/18 , H04N19/186
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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公开(公告)号：US11438580B2
公开(公告)日：2022-09-06
申请号：US17307336
申请日：2021-05-04
Inventor： Jing Ya Li , Ru Ling Liao , Chong Soon Lim , Han Boon Teo , Hai Wei Sun , Che Wei Kuo , Kiyofumi Abe , Takahiro Nishi , Tadamasa Toma
IPC: H04N19/105 , H04N19/136 , H04N19/159 , H04N19/176 , H04N19/52 , H04N19/80
Abstract: An encoder includes circuitry and memory connected to the circuitry. The circuitry: derives an absolute value of a sum of horizontal gradient values; derives, as a first parameter, the total sum of the absolute values of horizontal gradient values; derives, as a second parameter, the total sum of the absolute values of vertical gradient values; derives a horizontal-related pixel difference value; derives, as a third parameter, the total sum of the absolute values of horizontal-related pixel difference values; derives a vertical-related pixel difference value; derives, as a fourth parameter, the total sum of the absolute values of vertical-related pixel difference values; and generates a prediction image using the first to fourth parameters.
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公开(公告)号：US12294696B2
公开(公告)日：2025-05-06
申请号：US18529380
申请日：2023-12-05
Inventor： Jing Ya Li , Chong Soon Lim , Han Boon Teo , Che Wei Kuo , Hai Wei Sun , Chu Tong Wang , Kiyofumi Abe , Takahiro Nishi , Tadamasa Toma , Yusuke Kato
IPC: H04N19/105 , H04N19/14 , H04N19/159 , H04N19/176
Abstract: An encoder includes circuitry and memory coupled to the circuitry. The circuitry, in operation: determines whether a size of a current block, which is a unit for which a vector candidate list including vector candidates is generated, is less than or equal to a threshold; when the size of the current block is less than or equal to the threshold, generates the vector candidate list by registering a history-based motion vector predictor (HMVP) vector candidate in the vector candidate list from an HMVP table without performing a first pruning process; when the size of the current block is greater than the threshold, generates the vector candidate list by performing the first pruning process and registering the HMVP vector candidate in the vector candidate list from the HMVP table; and encodes the current block using the vector candidate list.
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公开(公告)号：US12289462B2
公开(公告)日：2025-04-29
申请号：US17642448
申请日：2020-12-21
Inventor： Han Boon Teo , Hai Wei Sun , Jing Ya Li , Che Wei Kuo , Chong Soon Lim , Chu Tong Wang , Kiyofumi Abe , Takahiro Nishi , Tadamasa Toma , Yusuke Kato
IPC: H04N19/00 , H04N19/105 , H04N19/176 , H04N19/46 , H04N19/80
Abstract: An encoder includes circuitry and memory coupled to the circuitry. In operation, the circuitry writes, into a bitstream, a first flag indicating whether or not to enable a first process of applying a filter to a first image to generate a second image, holding the second image as a reference image, and displaying the second image. When the first process is not enabled, circuitry writes, into the bitstream, one or more parameters for controlling a second process of applying the filter to the first image to generate the second image, holding the first image as a reference image, and displaying the second image.
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Patent Agency Ranking
公开(公告)号：US12273522B2
公开(公告)日：2025-04-08
申请号：US18111106
申请日：2023-02-17
Inventor： Chong Soon Lim , Hai Wei Sun , Jing Ya Li , Han Boon Teo , Ru Ling Liao , Che Wei Kuo , Tadamasa Toma , Takahiro Nishi , Kiyofumi Abe
IPC: H04N19/13 , H04N19/176
Abstract: An encoder includes circuitry and memory coupled to the circuitry. The circuitry, in operation, determines whether a first block is available and whether a second block is available, the first block and the second block being defined relative to a current block to be processed; selects a context model based on whether the first block is available, whether the second block is available, which of inter prediction and intra prediction is to be applied to the first block, and which of inter prediction and intra prediction is to be applied to the second block; and encodes, using the context model selected, a parameter indicating which of intra prediction and inter prediction is to be applied to the current block.
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公开(公告)号：US20240357103A1
公开(公告)日：2024-10-24
申请号：US18763019
申请日：2024-07-03
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：US20240323444A1
公开(公告)日：2024-09-26
申请号：US18675858
申请日：2024-05-28
Inventor： Hai Wei SUN , Chong Soon Lim , Han Boon Teo , Jing Ya Li , Che Wei Kuo , Chu Tong Wang , Kiyofumi Abe , Takahiro Nishi , Tadamasa Toma
IPC: H04N19/70 , H04N19/124 , H04N19/132 , H04N19/186 , H04N19/80
CPC classification number: H04N19/70 , H04N19/124 , H04N19/132 , H04N19/186 , H04N19/80
Abstract: An encoder: includes circuitry, and memory coupled to the circuitry; stores a first parameter into a bitstream, the first parameter indicating whether a syntax element related to a chroma tool offset is present in the bitstream; when the first parameter indicates that the syntax element is present in the bitstream, (i) stores, in the bitstream, one or more second parameters that are used in deblocking filtering for a chroma sample of a current image, in addition to the syntax element, (ii) performs the deblocking filtering using the one or more second parameters, and (iii) encodes the current image; and when the first parameter indicates that the syntax element is not present in the bitstream, encodes the current image without storing the one or more second parameters into the bitstream.
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公开(公告)号：US20240314296A1
公开(公告)日：2024-09-19
申请号：US18675704
申请日：2024-05-28
Inventor： Jing Ya LI , Chong Soon Lim , Han Boon Teo , Hai Wei Sun , Che Wei Kuo , Kiyofumi Abe , Takahiro Nishi , Tadamasa Toma , Yusuke Kato
IPC: H04N19/105 , H04N19/159 , H04N19/176 , H04N19/52
CPC classification number: H04N19/105 , H04N19/159 , H04N19/176 , H04N19/52
Abstract: Provided is an encoder includes: circuitry; and memory coupled to the circuitry, in which in operation, the circuitry: generates a prediction image of a current block to be processed, using a first motion vector; and updates a history based motion vector predictor (HMVP) table using a first candidate having the first motion vector, the HMVP table storing, in a first in first out (FIFO) method, a plurality of second candidates each having a second motion vector used for a processed block, and in the updating of the HMVP table, the circuitry: determines whether a size of the current block is less than or equal to a threshold size; and skips the updating of the HMVP table when the size of the current block is determined to be less than or equal to the threshold size.
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公开(公告)号：US20240291972A1
公开(公告)日：2024-08-29
申请号：US18657076
申请日：2024-05-07
Inventor： Ru Ling LIAO , Chong Soon Lim , Jing Ya Li , Han Boon Teo , Hai Wei Sun , Che Wei Kuo , Yusuke Kato , Tadamasa Toma , Kiyofumi Abe , Takahiro Nishi
IPC: H04N19/107 , H04N19/176
CPC classification number: H04N19/107 , H04N19/176
Abstract: An image encoder includes: circuitry; and a memory coupled to the circuitry. The circuitry, in operation: calculates first values of a current block using intra prediction, the intra prediction being limited to planar mode, the planar mode using multiple reference pixels for each pixel location of the current block; calculates second values of the current block using inter prediction; calculates third values of the current block by weighting the first values and the second values; and encodes the current block using the third values, and in the calculating of the third values, a first weight is applied to the first values and a second weight is applied to the second values, the second weight being different from the first weight.
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