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公开(公告)号:US20210160532A1
公开(公告)日:2021-05-27
申请号:US17167232
申请日:2021-02-04
Inventor: Li ZHANG , Kai ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/52 , H04N19/176 , H04N19/184
Abstract: Devices, systems and methods for digital video coding, which includes constructing separate motion candidate lists for video coding, are described. An exemplary method for video processing includes constructing, for a first video block of a video, a first motion candidate list using a first motion candidate list construction method that includes motion candidates that only relate to history-based motion vector prediction (HMVP) candidates, and performing a conversion between the first video block and a bitstream representation of the video including the first video block according to the constructed first motion candidate list.
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公开(公告)号:US20210160531A1
公开(公告)日:2021-05-27
申请号:US17161316
申请日:2021-01-28
Inventor: Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/52 , H04N19/176
Abstract: Devices, systems and methods for digital video coding, which include sub-block based inter prediction methods, are described. An exemplary method for video processing includes determining, for a conversion between a current block of video and a bitstream representation of the video, a maximum number of candidates in a sub-block based merge candidate list and/or whether to add sub-block based temporal motion vector prediction (SbTMVP) candidates to the sub-block based merge candidate list based on whether temporal motion vector prediction (TMVP) is enabled for use during the conversion or whether a current picture referencing (CPR) coding mode is used for the conversion, and performing, based on the determining, the conversion.
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公开(公告)号:US20210144409A1
公开(公告)日:2021-05-13
申请号:US17150256
申请日:2021-01-15
Inventor: Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/80 , H04N19/117 , H04N19/176 , H04N19/184
Abstract: A method for video bitstream processing includes determining, by a processor, that a reconstructed representation of a current sample of video data is to be subject to a bilateral filter defined by one or more parameters based, at least in part, on a weighted sum of sample intensity differences (SDiff) between a first window covering the current sample and a second window covering a neighboring sample, wherein multiple sample intensity differences are assigned unequal weights; and applying the bilateral filter defined by the one or more parameters to the reconstructed representation of the current sample of the video data.
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公开(公告)号:US20210144400A1
公开(公告)日:2021-05-13
申请号:US17154485
申请日:2021-01-21
Inventor: Hongbin LIU , Li ZHANG , Kai ZHANG , Jizheng XU , Yue WANG
IPC: H04N19/52 , H04N19/176 , H04N19/184 , H04N19/159 , H04N19/105 , H04N19/593 , H04N19/119 , H04N19/577
Abstract: Difference calculation based on partial position is described. In a representative aspect, a method of video processing comprising: calculating, during a conversion between a current block of video and a bitstream representation of the current block, differences between two reference blocks associated with the current block or differences between two reference sub-blocks associated with a sub-block within the current block based on representative positions of the reference blocks or representative positions of the reference sub-blocks; and performing the conversion based on the differences.
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公开(公告)号:US20210144366A1
公开(公告)日:2021-05-13
申请号:US17154680
申请日:2021-01-21
Inventor: Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/107 , H04N19/176 , H04N19/186
Abstract: Techniques for implementing video processing techniques are described. In one example implementation, a method of video processing includes determining, for a conversion between a current block of a video coded using a combined inter and intra prediction (CIIP) coding technique and a bitstream representation of the video, an intra-prediction mode of the current block independently from an intra-prediction mode of a neighboring block. The CIIP coding technique uses an intermedia inter prediction value and an intermedia intra prediction value to derive a final prediction value of the current block. The method also includes performing the conversion based on the determining.
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公开(公告)号:US20210092436A1
公开(公告)日:2021-03-25
申请号:US17109972
申请日:2020-12-02
Inventor: Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/52 , H04N19/176 , H04N19/184
Abstract: Devices, systems and methods for the simplification of sub-block motion candidate lists for video coding are described. In a representative aspect, a method for video processing includes determining, during a conversion between a current block and a bitstream representation of the current block, a temporal motion vector prediction candidate for a sub-block of the current block. The temporal motion vector prediction candidate is completely determined based on K neighboring blocks of the current block, K being a positive integer. The method also includes performing the conversion based on the temporal motion vector prediction candidate for the sub-block.
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公开(公告)号:US20210092395A1
公开(公告)日:2021-03-25
申请号:US17115290
申请日:2020-12-08
Inventor: Kai ZHANG , Li ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/132 , H04N19/105 , H04N19/30 , H04N19/117 , H04N19/80 , H04N19/186 , H04N19/176
Abstract: Devices, systems and methods for digital video coding, which includes simplified cross-component prediction, are described. In a representative aspect, a method for video coding includes receiving a bitstream representation of a current block of video data comprising at least one luma component and at least one chroma component, predicting, using a linear model, a first set of samples of the at least one chroma component based on a second set of samples that is selected by sub-sampling samples of the at least one luma component, and processing, based on the first and second sets of samples, the bitstream representation to generate the current block. In another representative aspect, the second set of samples are neighboring samples of the current block and are used for an intra prediction mode of the at least one luma component.
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公开(公告)号:US20210092377A1
公开(公告)日:2021-03-25
申请号:US17109873
申请日:2020-12-02
Inventor: Kai ZHANG , Li ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/119 , H04N19/96 , H04N19/169 , H04N19/176
Abstract: A method for video bitstream processing, comprising: determining that a first portion of a data unit of the video bitstream exceeds beyond one or multiple borders of a second portion of the data unit of the video bitstream; and performing at least one of: extended quad tree (EQT) partitioning, flexible tree (FT) partitioning, or generalized triple tree (GTT) partitioning of the first portion of the data unit based on the determination that the first portion exceeds beyond the border.
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公开(公告)号:US20210076063A1
公开(公告)日:2021-03-11
申请号:US17086935
申请日:2020-11-02
Inventor: Hongbin LIU , Li ZHANG , Kai ZHANG , Yue WANG
IPC: H04N19/513 , H04N19/176 , H04N19/159 , H04N19/105 , H04N19/44 , H04N19/139
Abstract: Devices, systems and methods for digital video coding, which include decoder side motion vector derivation (DMVD) tools, are described. An exemplary method for video processing includes making a decision, based on a determination that a current block of a video is coded using a multi-hypothesis prediction mode, regarding a selective enablement of a DMVD tool for the current block, wherein the DMVD tool derives a refinement of motion information signaled in a bitstream representation of the video; and performing, based on the decision, a conversion between the current block and the bitstream representation.
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公开(公告)号:US20210058647A1
公开(公告)日:2021-02-25
申请号:US17090276
申请日:2020-11-05
Inventor: Li ZHANG , Kai ZHANG , Hongbin LIU , Hsiao Chiang CHUANG , Yue WANG
IPC: H04N19/96 , H04N19/176 , H04N19/119
Abstract: Methods, systems and devices for using flexible and efficient partitioning techniques are described. An exemplary method for visual media decoding includes applying, to a current visual media block, a partitioning process that splits the current visual media block into exactly four sub-blocks including at least one sub-block that has a size different from half of a width of the current visual media block times half of a height of the current visual media block, decoding, based on a bitstream representation, the four sub-blocks, and decoding, based on the four sub-blocks and the partitioning process, the current visual media block.
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