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公开(公告)号：US20250168332A1
公开(公告)日：2025-05-22
申请号：US19025525
申请日：2025-01-16
Inventor： Che-Wei KUO , Chong Soon LIM , Jing Ya LI , Han Boon TEO , Hai Wei SUN , Chu Tong WANG , Tadamasa TOMA , Takahiro NISHI , Kiyofumi ABE , Yusuke KATO
IPC: H04N19/117 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/82
Abstract: An encoder includes circuitry which generates a first coefficient value by applying a CCALF process to a first reconstructed image sample of a luma component; generates a second coefficient value by applying an ALF process to a second reconstructed image sample of a chroma component; 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. The circuitry writes a first parameter into a sequence parameter set; writes a second parameter into a parameter set of a picture in response to a value of the first parameter being 1; writes a third parameter into a slice header in response to the value of the first parameter being 1; and writes a fourth parameter into a coding tree unit in response to a value of the third parameter being 1.
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公开(公告)号：US20250119573A1
公开(公告)日：2025-04-10
申请号：US18950959
申请日：2024-11-18
Inventor： Jing Ya LI , Chong Soon LIM , Sughosh Pavan SHASHIDHAR , Ru Ling LIAO , Hai Wei SUN , Han Boon TEO , Kiyofumi ABE , Tadamasa TOMA , Takahiro NISHI
IPC: H04N19/513 , H04N19/119 , H04N19/176 , H04N19/96
Abstract: An encoder includes circuitry and memory connected to the circuitry. In operation, the circuitry corrects a base motion vector using a correction value in a fixed direction; and encodes a current partition by using the corrected base motion vector corrected. The correction value is specified by an index indicating one of correction values included in a table. The table is selected from among a plurality of tables, wherein the correction values in one of the plurality of tables have different increments from the correction values in another one of the plurality of tables.
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公开(公告)号：US20250097476A1
公开(公告)日：2025-03-20
申请号：US18958923
申请日：2024-11-25
Inventor： Jing Ya LI , Han Boon TEO , Chong Soon LIM , Hai Wei SUN , Che-Wei KUO , Chu Tong WANG , Tadamasa TOMA , Takahiro NISHI , Kiyofumi ABE , Yusuke KATO
IPC: H04N19/82 , H04N19/107 , H04N19/176 , H04N19/186
Abstract: A decoder includes memory and a processor coupled to the memory and configured to: generate a first coefficient value by applying a CCALF (cross component adaptive loop filtering) process to a first reconstructed image sample of a luma component; clip the first coefficient value such that the clipped first coefficient value is within a first range from −27 to 27−1; generate a second coefficient value by applying an ALF (adaptive loop filtering) process to a second reconstructed image sample of a chroma component; clip the second coefficient value such that the clipped second coefficient value is within a second range different from the first range; generate a third coefficient value by adding the clipped first coefficient value to the clipped second coefficient value; and generate a third reconstructed image sample of the chroma component using the third coefficient value.
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公开(公告)号：US20250039393A1
公开(公告)日：2025-01-30
申请号：US18910733
申请日：2024-10-09
Inventor： Ru Ling LIAO , Chong Soon LIM , Hai Wei SUN , Han Boon TEO , Jing Ya LI , Kiyofumi ABE , Takahiro NISHI , Tadamasa TOMA
IPC: H04N19/137 , H04N19/105 , H04N19/119 , H04N19/132 , H04N19/159 , H04N19/176
Abstract: An image encoder or decoder includes circuitry and a memory coupled to the circuitry. The circuitry, in operation, predicts a first set of samples for a first partition of a current picture with one or more motion vectors including a first motion vector and predicts a second set of samples for a first portion of the first partition with one or more motion vectors from a second partition different from the first partition. The samples of the first set of samples of the first portion of the first partition and of the second set of samples of the first portion of the first partition are weighted. A motion vector for the first portion of the first partition is stored which is based on one or both of the first motion vector and the second motion vector. The first partition is encoded or decoded using at least the weighted samples of the first portion of the first partition.
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公开(公告)号：US20250030868A1
公开(公告)日：2025-01-23
申请号：US18908088
申请日：2024-10-07
Inventor： Ru Ling LIAO , Chong Soon LIM , Hai Wei SUN , Han Boon TEO , Jing Ya LI , Kiyofumi ABE , Takahiro NISHI , Tadamasa TOMA
IPC: H04N19/137 , H04N19/105 , H04N19/119 , H04N19/132 , H04N19/159 , H04N19/176
Abstract: An image encoder or decoder includes circuitry and a memory coupled to the circuitry. The circuitry, in operation, predicts a first set of samples for a first partition of a current picture with one or more motion vectors including a first motion vector and predicts a second set of samples for a first portion of the first partition with one or more motion vectors from a second partition different from the first partition. The samples of the first set of samples of the first portion of the first partition and of the second set of samples of the first portion of the first partition are weighted. A motion vector for the first portion of the first partition is stored which is based on one or both of the first motion vector and the second motion vector. The first partition is encoded or decoded using at least the weighted samples of the first portion of the first partition.
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Patent Agency Ranking
公开(公告)号：US20240388707A1
公开(公告)日：2024-11-21
申请号：US18787763
申请日：2024-07-29
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: H04N19/119 , H04N19/176
Abstract: Provided is an encoder which includes circuitry and memory. The circuitry encodes an image block using the memory. In encoding the image block, the circuitry: obtains one or more size parameters related to a size of the image block; determines whether the one or more size parameters and one or more thresholds satisfy a determined relationship; encodes a split parameter when the one or more size parameters and the one or more thresholds are determined to satisfy the determined relationship, the split parameter indicating whether the image block is to be split into a plurality of partitions including a non-rectangular partition; and encodes the image block after splitting the image block into the plurality of partitions when the split parameter indicates that the image block is to be split into the plurality of partitions.
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公开(公告)号：US20240114129A1
公开(公告)日：2024-04-04
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
CPC classification number: 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：US20230421762A1
公开(公告)日：2023-12-28
申请号：US18462232
申请日：2023-09-06
Inventor： Sughosh Pavan SHASHIDHAR , Hai Wei SUN , Chong Soon LIM , Ru Ling LIAO , Han Boon TEO , Jing Ya LI , Takahiro NISHI , Kiyofumi ABE , Ryuichi KANOH , Tadamasa TOMA
IPC: H04N19/119 , H04N19/176 , H04N19/423 , H04N19/63
CPC classification number: H04N19/119 , H04N19/176 , H04N19/423 , H04N19/63
Abstract: An encoder that encodes a current block in a picture includes circuitry and memory. Using the memory, the circuitry: splits the current block into a first sub block, a second sub block, and a third sub block in a first direction, the second sub block being located between the first sub block and the third sub block; prohibits splitting the second sub block into two partitions in the first direction; and encodes the first sub block, the second sub block, and the third sub block.
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公开(公告)号：US20230412832A1
公开(公告)日：2023-12-21
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
CPC classification number: 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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10.发明公开公开(公告)号：US20230396776A1
公开(公告)日：2023-12-07
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: H04N19/159 , H04N19/117 , H04N19/182
CPC classification number: 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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