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公开(公告)号：US11202093B2
公开(公告)日：2021-12-14
申请号：US16654668
申请日：2019-10-16
Inventor： Kiyofumi Abe , Takahiro Nishi , Tadamasa Toma , Ryuichi Kanoh , Takashi Hashimoto
IPC: H04N19/573 , H04N19/176 , H04N19/52
Abstract: An encoder includes memory and circuitry. The circuitry (i) encodes first control information indicating one mode, (ii) encodes second control information indicating whether it is possible to perform the motion compensation in a unit of a sub-block, (iii) derives the motion vector of the block in the one mode, (iv) determines whether to perform the motion compensation in the unit of the sub-block or the motion compensation in a unit of the block, (v) derives a motion vector of the sub-block and performs the motion compensation in the unit of the sub-block using the motion vector of the sub-block when determining to perform the motion compensation in the unit of the sub-block, and (vi) performs the motion compensation in the unit of the block using the motion vector of the block when determining to perform the motion compensation in the unit of the block.
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公开(公告)号：US11197030B2
公开(公告)日：2021-12-07
申请号：US16988231
申请日：2020-08-07
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 , H04N19/186 , H04N19/176
Abstract: A decoder includes circuitry and memory coupled to the circuitry. 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, and clips the first coefficient value. 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, and clips the second coefficient value. The circuitry generates a third coefficient value by adding the clipped first coefficient value to the clipped second coefficient value, and decodes a third reconstructed image sample of the chroma component using the third coefficient value.
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公开(公告)号：US11184612B2
公开(公告)日：2021-11-23
申请号：US16023538
申请日：2018-06-29
Inventor： Ryuichi Kanoh , Tadamasa Toma , Kiyofumi Abe , Takahiro Nishi
IPC: H04N19/61 , H04N19/176 , H04N19/122 , H04N19/60 , H04N19/12 , H04N19/65 , H04N19/46 , H04N19/14 , H04N19/147 , H04N19/119
Abstract: An encoder which codes a moving picture includes: a processor; and a memory, wherein the processor, using the memory: subtracts a prediction image of an image included in the moving picture from the image so as to derive a prediction error; sequentially selects a plurality of transform basis candidates; derives an evaluation value of a transform basis candidate selected; compares the evaluation value with a threshold value; based on a result of the comparison, skips selection of one or more transform basis candidates that have not been selected; determines the transform basis from one or more transform basis candidates selected; performs the transform of the prediction error, using the transform basis; quantizes a result of the transform; and codes a result of the quantization as data of the image.
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公开(公告)号：US11172201B2
公开(公告)日：2021-11-09
申请号：US16222104
申请日：2018-12-17
Inventor： Virginie Drugeon , Tadamasa Toma , Takahiro Nishi , Kiyofumi Abe , Ryuichi Kanoh
IPC: H04N19/132 , H04N19/159 , H04N19/182 , H04N19/196 , H04N19/117 , H04N19/105
Abstract: An encoder includes circuitry and memory. Using the memory, the circuitry performs: deriving a plurality of reference samples positioned on a first line, for intra prediction; and generating a prediction image using the plurality of reference samples. The deriving includes interpolating a value on a second line perpendicular to the first line using values of encoded pixels on the second line to generate an interpolated value, and deriving one of the plurality of reference samples by projecting the interpolated value onto the first line.
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公开(公告)号：US11166020B2
公开(公告)日：2021-11-02
申请号：US16701761
申请日：2019-12-03
Inventor： Ryuichi Kanoh , Tadamasa Toma , Takahiro Nishi , Kiyofumi Abe , Takashi Hashimoto
IPC: H04N19/117 , H04N19/14 , H04N19/176 , H04N19/196
Abstract: An encoder includes processing circuitry and memory. Using the memory, the processing circuitry: encodes and reconstructs an image to generate a reconstructed image; determines, according to a characteristic of a block in the reconstructed image, an interpolation method for interpolating pixels located outside a referable region including the block; interpolates the pixels located outside the referable region, using the interpolation method determined; and applies a filter to the block using the pixels interpolated.
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Patent Agency Ranking
公开(公告)号：US11146812B2
公开(公告)日：2021-10-12
申请号：US16942583
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: H04N19/537 , 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; generates a motion vector candidate list; obtains a motion vector from the motion vector candidate list; performs inter prediction processing using the motion vector; and encodes the image block using a result of the inter prediction processing. When a partition is a non-rectangular partition, the circuitry generates the motion vector candidate list using at least one motion vector among a plurality of motion vectors for a plurality of spatially neighboring partitions or a plurality of motion vectors for a plurality of temporally neighboring partitions, without using a plurality of motion vectors for a plurality of sub-partitions.
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公开(公告)号：US11109053B2
公开(公告)日：2021-08-31
申请号：US16291289
申请日：2019-03-04
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: H04N19/52 , H04N19/44 , H04N19/70 , H04N19/176
Abstract: An encoder includes circuitry and memory. The circuitry, using the memory: calculates at least one difference value between a plurality of pixels in a first block of a current image; calculates a denominator value used for a second block, using the difference value, the denominator value being used for a plurality of sub-blocks of the first block, the second block being one of the plurality of sub-blocks; determines a shift value, using the denominator value; calculates a first value and a second value, using at least a shift operation with the shift value; determines a prediction sample for the second block, using at least the first value and the second value; and encodes the second block, using at least the prediction sample.
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公开(公告)号：US11095919B2
公开(公告)日：2021-08-17
申请号：US16194586
申请日：2018-11-19
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 , H04N5/00 , H04N19/46 , H04N19/176 , G06T5/00 , 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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公开(公告)号：US11095888B2
公开(公告)日：2021-08-17
申请号：US16591902
申请日：2019-10-03
Inventor： Ryuichi Kanoh , Takahiro Nishi , Tadamasa Toma
IPC: H04N19/117 , H04N19/182 , H04N19/176 , H04N19/187 , H04N19/186
Abstract: An encoder includes processing circuitry and a memory coupled to the processing circuitry. Using the memory, the processing circuitry is configured to: change values of pixels in a first block and a second block to filter a boundary between the first block and the second block. The pixels include type one pixels and type two pixels different from the type one pixels. The first set of filter coefficients applied to the type one pixels in the first block and the second set of filter coefficients applied to the type one pixels in the second block are selected to be asymmetrical with respect to the boundary based on block sizes of the first block and the second block.
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270.发明授权公开(公告)号：US11064216B2
公开(公告)日：2021-07-13
申请号：US16794944
申请日：2020-02-19
Inventor： Kiyofumi Abe , Takahiro Nishi , Tadamasa Toma , Ryuichi Kanoh , Takashi Hashimoto
IPC: H04N19/52 , H04N19/124 , H04N19/159 , H04N19/176
Abstract: An encoder includes circuitry and memory. Using the memory, the circuitry, in inter prediction processing: derives a first motion vector of a current block to be processed, using a motion vector of a previous block which has been previously processed; derives a second motion vector of the current block by performing motion estimation in the vicinity of the first motion vector; and generates a prediction image of the current block by performing motion compensation using the second motion vector.
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