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公开(公告)号：US11956467B2
公开(公告)日：2024-04-09
申请号：US17469748
申请日：2021-09-08
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
CPC classification number: H04N19/537 , H04N19/119 , H04N19/176
Abstract: An encoder, when sub-block encoding is to be performed, determines a plurality of sub-blocks in a first image block, the plurality of sub-blocks including a first sub-block, determines a first motion vector for the first sub-block by referring to a first candidate list, performs first inter prediction processing on the first sub-block using the first motion vector, and encodes the first image block using a result of the first inter prediction processing. When partition encoding is to be performed, the encoder, in operation, determines a plurality of partitions in a second image block, the plurality of partitions including a first partition, determines a second motion vector for the first partition by referring to a second candidate list, performs second inter prediction processing on the first partition using the second motion vector, and encodes the second image block using a result of the second inter prediction processing.
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公开(公告)号：US11936886B2
公开(公告)日：2024-03-19
申请号：US17547608
申请日：2021-12-10
Inventor： Virginie Drugeon , Tadamasa Toma , Takahiro Nishi , Kiyofumi Abe , Yusuke Kato
IPC: H04N19/196 , H04N19/31 , H04N19/46 , H04N19/70
CPC classification number: H04N19/196 , H04N19/31 , H04N19/46 , H04N19/70
Abstract: An encoder includes memory and circuitry coupled to the memory. The circuitry, for each of temporal sub-layers for temporal scalability different from spatial scalability, stores first parameters into buffering period supplemental enhancement information (SEI) and encodes the first parameters. The first parameters present initial delays in timing to extract data from a coded picture buffer (CPB). The circuitry stores a second parameter into the buffering period SEI and encodes the second parameter. The second parameter indicates a total number of the temporal sub-layers. A value of the second parameter is equal to a value of a third parameter that is encoded into a sequence parameter set and indicates a total number of the temporal sub-layers.
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公开(公告)号：US11930206B2
公开(公告)日：2024-03-12
申请号：US18136561
申请日：2023-04-19
Inventor： Chong Soon Lim , Hai Wei Sun , Sughosh Pavan Shashidhar , Han Boon Teo , Ru Ling Liao , Jing Ya Li , Tadamasa Toma , Takahiro Nishi , Kiyofumi Abe , Ryuichi Kanoh
IPC: H04N19/52
CPC classification number: H04N19/52
Abstract: An encoder which includes circuitry and memory. Using the memory, the circuitry generates a list which includes candidates for a first motion vector for a first partition. The list has a maximum list size and an order of the candidates, and at least one of the maximum list size or the order of the candidates is dependent on at least one of a partition size or a partition shape of the first partition. The circuitry selects the first motion vector from the candidates included in the list; encodes an index indicating the first motion vector among the candidates in the list into the bitstream based on the maximum list size; and generates the predicted image for the first partition using the first motion vector.
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公开(公告)号：US11929102B2
公开(公告)日：2024-03-12
申请号：US17556227
申请日：2021-12-20
Inventor： Hiroshi Yahata , Tadamasa Toma , Tomoki Ogawa
IPC: H04N19/44 , G11B20/10 , G11B27/00 , G11B27/10 , G11B27/28 , G11B27/32 , H04N5/84 , H04N5/85 , H04N7/015 , H04N9/804 , H04N9/82 , H04N9/87 , G11B20/00 , H04N9/16
CPC classification number: G11B27/28 , G11B20/10 , G11B27/105 , G11B27/329 , H04N5/84 , H04N5/85 , H04N7/015 , H04N9/8042 , H04N9/8205 , H04N9/8233 , G11B2220/2541 , G11B2220/2562
Abstract: A decoding system decodes a video stream, which is encoded video information. The decoding system includes a decoder that acquires the video steam and generates decoded video information, a maximum luminance information acquirer that acquires maximum luminance information indicating the maximum luminance of the video stream from the video stream, and an outputter that outputs the decoded video information along with the maximum luminance information. In in a case where the video stream includes a base video stream and an enhanced video stream, the decoder generates base video information by decoding the base video stream, an enhanced video information by decoding the enhanced video stream, and generates the decoded video information based on the base video information and the enhanced video information, and the outputter outputs the decoded video information, along with the maximum luminance information.
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公开(公告)号：US11917150B2
公开(公告)日：2024-02-27
申请号：US17728284
申请日：2022-04-25
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: H04N19/119 , H04N19/176 , H04N19/137 , H04N19/52
CPC classification number: H04N19/119 , H04N19/137 , H04N19/176 , H04N19/52
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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Patent Agency Ranking
公开(公告)号：US11909998B2
公开(公告)日：2024-02-20
申请号：US16906993
申请日：2020-06-19
Inventor： Che-Wei Kuo , JIng Ya Li , Chong Soon Lim , Han Boon Teo , Hai Wei Sun , Rohith Mars , Tadamasa Toma , Takahiro Nishi , Kiyofumi Abe , Yusuke Kato
IPC: H04N19/50 , H04N19/124 , H04N19/176 , H04N19/186 , H04N19/96
CPC classification number: H04N19/50 , H04N19/124 , H04N19/176 , H04N19/186 , H04N19/96
Abstract: An encoder includes circuitry and memory. The circuitry determines whether a first virtual pipeline decoding unit (VPDU) is split into smaller blocks and whether a second VPDU is split into smaller blocks. In response to a determination the first VPDU is not split into smaller blocks and a determination the second VPDU is split into smaller blocks, a block of chroma samples is predicted without using luma samples. In response to a determination the first VPDU is split into smaller blocks and a determination the second VPDU is split into smaller blocks, the block of chroma samples is predicted using luma samples. In response to a determination the first VPDU is not split into smaller blocks and a determination the second VPDU is not split into smaller block, the block of chroma samples is predicted using luma samples. The block is encoded using the predicted chroma samples.
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公开(公告)号：US11895323B2
公开(公告)日：2024-02-06
申请号：US18058057
申请日：2022-11-22
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: H04N11/02 , H04N19/52 , H04N19/119 , H04N19/176
CPC classification number: H04N19/52 , H04N19/119 , H04N19/176
Abstract: An encoder includes circuitry and memory. Using the memory, the circuitry, in operation, selects an encoding mode from among candidates including a decoder-side motion vector refinement (DMVR) encoding mode and a partition encoding mode. When the DMVR encoding mode is selected, the circuitry: obtains a first motion vector for a first image block; derives a second motion vector from the first motion vector using motion search; and generates a prediction image for the first image block using the second motion vector. When the partition encoding mode is selected, the circuitry: determines a plurality of partitions in a second image block; obtains a third motion vector for each partition; and generates a prediction image for the second image block using the third motion vector, without deriving a fourth motion vector from the third motion vector using motion search.
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公开(公告)号：US11889078B2
公开(公告)日：2024-01-30
申请号：US17833540
申请日：2022-06-06
Inventor： Chong Soon Lim , Hai Wei Sun , Sughosh Pavan Shashidhar , Han Boon Teo , Ru Ling Liao , Takahiro Nishi , Tadamasa Toma
IPC: H04N19/119 , H04N19/159 , H04N19/176 , H04N19/196 , H04N19/96 , H04N19/157 , H04N19/463
CPC classification number: H04N19/119 , H04N19/157 , H04N19/159 , H04N19/176 , H04N19/196 , H04N19/463 , H04N19/96
Abstract: An image encoder/decoder includes circuitry and a memory coupled to the circuitry. When a geometry of a block of a picture satisfies a first condition, the circuitry splits the block of the picture into sub blocks having a first set of geometries. When the geometry of the block does not satisfy the first condition, the circuitry splits the block of the picture into sub blocks having a second set of geometries, the second set of geometries being different from the first set of geometries. The circuitry encodes/decodes the sub blocks of the block.
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公开(公告)号：US11889059B2
公开(公告)日：2024-01-30
申请号：US17875965
申请日：2022-07-28
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
CPC classification number: 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：US11882279B2
公开(公告)日：2024-01-23
申请号：US17725106
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: H04N19/52 , H04N19/119 , H04N19/137 , H04N19/176
CPC classification number: H04N19/119 , H04N19/137 , H04N19/176 , H04N19/52
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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