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公开(公告)号：US20220385899A1
公开(公告)日：2022-12-01
申请号：US17868199
申请日：2022-07-19
Inventor： Han Boon TEO , Hai Wei SUN , Chong Soon LIM , Jing Ya LI , Chu Tong WANG , Kiyofumi ABE , Takahiro NISHI , Tadamasa TOMA
IPC: H04N19/117 , H04N19/80 , H04N19/105 , H04N19/46
Abstract: An encoder includes circuitry and memory coupled to the circuitry. The circuitry: executes a second process of applying a second filter to the first image to generate a second image, not holding the second image as a reference image, holding the first image as a reference image, and displaying the second image; writes coefficients of each of one or more filter candidates that are candidates for the second filter into a bitstream, wherein the coefficients are included in a first storage location when written into the bitstream; and writes a parameter that specifies, for each image, one of the one or more filter candidates as the second filter into the bitstream, wherein the parameter is included in a second storage location when written into the bitstream, and the second storage location is different from the first storage location.
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公开(公告)号：US20220360811A1
公开(公告)日：2022-11-10
申请号：US17864906
申请日：2022-07-14
Inventor： Jing Ya LI , Chong Soon LIM , Ru Ling LIAO , Han Boon TEO , Hai Wei SUN , Che Wei KUO , Kiyofumi ABE , Takahiro NISHI , Tadamasa TOMA
IPC: H04N19/513 , H04N19/139 , H04N19/159 , H04N19/176
Abstract: Provided is an encoder including circuitry and memory coupled to the circuitry. A prediction mode for a current block is an affine mode, and in operation, the circuitry: derives a base motion vector which is a motion vector to be used in a prediction process for the current block, and is a motion vector at an affine-mode control point in the current block; 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; if so, modifies a second motion vector different from the base motion vector and the first motion vector, and if not, does not modify the second motion vector; and encodes the current block using the second motion vector modified or the second motion vector not modified.
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公开(公告)号：US20220279180A1
公开(公告)日：2022-09-01
申请号：US17725113
申请日：2022-04-20
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：US20220256149A1
公开(公告)日：2022-08-11
申请号：US17726133
申请日：2022-04-21
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 , H04N19/52 , H04N19/176 , H04N19/137
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, (ii) a gradient image for the first prediction image, and (iii) a second prediction image as the prediction image using the first prediction image and the gradient image. When the partition is a non-rectangular partition, the circuitry obtains the first prediction image as the prediction image without using the gradient image.
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公开(公告)号：US20220150488A1
公开(公告)日：2022-05-12
申请号：US17580344
申请日：2022-01-20
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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Patent Agency Ranking
96.发明申请公开(公告)号：US20220120839A1
公开(公告)日：2022-04-21
申请号：US17600513
申请日：2020-03-16
Inventor： Rohith MARS , Srikanth NAGISETTY , Chong Soon LIM , Hiroyuki EHARA , Akihisa KAWAMURA
Abstract: Provided is a direction of arrival estimation device wherein: a calculation circuit calculates a frequency weighting factor for each of a plurality of frequency components of signals recorded in a microphone array, on the basis of the differences among unit vectors indicating the directions of the sound sources of each of the plurality of frequency components; and an estimation circuit estimates the direction of arrival of a signal from the sound source, on the basis of the frequency weighting factors.
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公开(公告)号：US20220094949A1
公开(公告)日：2022-03-24
申请号：US17539348
申请日：2021-12-01
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: H04N19/176 , H04N19/105 , H04N19/52 , H04N19/70
Abstract: An encoder, includes: circuitry; and memory. Using the memory, the circuitry: in inter prediction for a current block, determines a base motion vector, and writes, in an encoded signal, a delta motion vector representing (i) one direction among a plurality of directions including a diagonal direction and (ii) a distance from the base motion vector; and encodes the current block using the delta motion vector and the base motion vector as a motion vector of the current block.
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公开(公告)号：US20210385474A1
公开(公告)日：2021-12-09
申请号：US17408315
申请日：2021-08-20
Inventor： Chong Soon LIM , Sughosh Pavan SHASHIDHAR , Ru Ling LIAO , Hai Wei SUN , Han Boon TEO , Jing Ya LI , Kiyofumi ABE , Tadamasa TOMA , Takahiro NISHI
IPC: H04N19/44 , H04N19/119 , H04N19/137 , H04N19/159 , H04N19/176
Abstract: An image decoder has circuitry coupled to a memory. The circuitry splits a current image block into a plurality of partitions. The circuitry predicts a first motion vector from a set of uni-prediction motion vector candidates for a first partition of the plurality of partitions, and decodes the first partition using the first motion vector.
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公开(公告)号：US20210360272A1
公开(公告)日：2021-11-18
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: H04N19/44 , 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：US20210344958A1
公开(公告)日：2021-11-04
申请号：US17373106
申请日：2021-07-12
Inventor： Chong Soon LIM , Han Boon TEO , Takahiro NISHI , Tadamasa TOMA , Ru Ling LIAO , Sughosh Pavan SHASHIDHAR , Hai Wei SUN
IPC: H04N19/597 , H04N19/159 , H04N19/176 , G06T5/00 , H04N19/46 , H04N19/85
Abstract: An encoder capable of properly handling an image to be encoded or decoded includes processing circuitry and memory connected to the processing circuitry. Using the memory, the processing circuitry: obtains parameters including at least one of (i) one or more parameters related to a first process for correcting distortion in an image captured with a wide angle lens and (ii) one or more parameters related to a second process for stitching a plurality of images; generates an encoded image by encoding a current image to be processed that is based on the image or the plurality of images; and writes the parameters into a bitstream including the encoded image.
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