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公开(公告)号：US20220070455A1
公开(公告)日：2022-03-03
申请号：US17524477
申请日：2021-11-11
Inventor： Li ZHANG , Weijia ZHU , Kai ZHANG , Hongbin LIU , Jizheng XU
IPC: H04N19/117 , H04N19/82 , H04N19/132 , H04N19/169 , H04N19/159 , H04N19/176
Abstract: In an exemplary aspect, a method for visual media processing includes determining whether a pair of adjacent blocks of visual media data are both intra block copy (IBC) coded; and selectively applying, based on the determination, a deblocking filter (DB) process by identifying a boundary at a vertical edge and/or a horizontal edge of the pair of adjacent blocks, calculating a boundary strength of a filter, deciding whether to turn on or off the filter, and selecting a strength of the filter in case the filter is turned on, wherein the boundary strength of the filter is dependent on a motion vector difference between motion vectors associated with the pair of adjacent blocks.
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公开(公告)号：US20220070454A1
公开(公告)日：2022-03-03
申请号：US17523131
申请日：2021-11-10
Inventor： Li ZHANG , Weijia ZHU , Kai ZHANG , Hongbin LIU , Jizheng XU
IPC: H04N19/117 , H04N19/82 , H04N19/132 , H04N19/159 , H04N19/176
Abstract: In an exemplary aspect, a method for visual media processing includes identifying a boundary at a vertical edge and/or a horizontal edge of two video blocks; calculating a boundary strength of a filter based on at least one of the two video blocks crossing a vertical edge or a horizontal edge is coded using a combined intra-inter prediction (CIIP) mode; deciding whether to turn on or off the filter; selecting a strength of the filter in case the filter is turned on; and performing, based on the selecting, a deblocking filter (DB) process to the video blocks.
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公开(公告)号：US20210329290A1
公开(公告)日：2021-10-21
申请号：US17360868
申请日：2021-06-28
Inventor： Jizheng XU , Jiahao LI , Weijia ZHU , Kai ZHANG , Li ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/537 , H04N19/513 , H04N19/147 , H04N19/105 , H04N19/176
Abstract: Methods, systems and device for hash-based motion estimation in video coding are described. An exemplary method of video processing includes determining, for a conversion between a current block of a video and a bitstream representation of the video, motion information associated with the current block using a hash-based motion search, a size of the current block being M×N, M and N being positive integers and M being not equal to N, applying, based on the motion information and a video picture comprising the current block, a prediction for the current block, and performing, based on the prediction, the conversion.
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公开(公告)号：US20230059345A1
公开(公告)日：2023-02-23
申请号：US17572810
申请日：2022-01-11
Inventor： Weijia ZHU , Li ZHANG , Jizheng XU , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/132 , H04N19/159 , H04N19/186 , H04N19/176 , H04N19/70
Abstract: Devices, systems and methods for palette mode coding are described. An exemplary method for video processing includes performing a conversion between a block of a video and a bitstream representation of the video. The bitstream representation is processed according to a format rule that specifies a first indication of usage of a palette mode and a second indication of usage of an intra block copy (IBC) mode are signaled dependent of each other.
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公开(公告)号：US20230007271A1
公开(公告)日：2023-01-05
申请号：US17384137
申请日：2021-07-23
Inventor： Weijia ZHU , Li ZHANG , Jizheng XU , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/159 , H04N19/176 , H04N19/46 , H04N19/132 , H04N19/186 , H04N19/107
Abstract: Devices, systems and methods for palette mode coding are described. An exemplary method for video processing includes determining, for a conversion between a block of a video region in a video and a bitstream representation of the video, a prediction mode based on one or more allowed prediction modes that include at least a palette mode of the block. An indication of usage of the palette mode is determined according to the prediction mode. The method also includes performing the conversion based on the one or more allowed prediction modes.
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Patent Agency Ranking
公开(公告)号：US20220377341A1
公开(公告)日：2022-11-24
申请号：US17330792
申请日：2021-05-26
Inventor： Weijia ZHU , Li ZHANG , Jizheng XU , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/132 , H04N19/159 , H04N19/96 , H04N19/186 , H04N19/176
Abstract: Devices, systems and methods for palette mode coding are described. An exemplary method for video processing includes performing a conversion between a block of a video region of a video and a bitstream representation of the video. The bitstream representation is processed according to a first format rule that specifies whether a first indication of usage of a palette mode is signaled for the block and a second format rule that specifies a position of the first indication relative to a second indication of usage of a prediction mode for the block.
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公开(公告)号：US20220321916A1
公开(公告)日：2022-10-06
申请号：US17842025
申请日：2022-06-16
Inventor： Weijia ZHU , Jizheng XU , Li ZHANG , Yue WANG
IPC: H04N19/60 , H04N19/105 , H04N19/186 , H04N19/176
Abstract: Methods, systems and devices for implementing adaptive color transform (ACT) and block based delta pulse code modulation (BDPCM) during image/video encoding or decoding are described. An example method of video processing includes determining, for a conversion between a current video unit of a video that is a chroma video unit and a bitstream representation of the video, whether a block-based delta pulse code modulation (BDPCM) mode is available based on a rule, and performing the conversion based on the determining, wherein the rule is based on whether an adaptive color transform (ACT) mode is used for coding the current video unit and/or whether the BDPCM mode is used for coding a luma video unit corresponding to the current video unit.
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公开(公告)号：US20220191447A1
公开(公告)日：2022-06-16
申请号：US17556769
申请日：2021-12-20
Inventor： Li ZHANG , Jizheng XU , Kai ZHANG , Hongbin LIU , Weijia ZHU , Yue WANG
IPC: H04N9/67 , H04N19/12 , H04N19/30 , H04N19/132 , H04N19/105 , H04N19/11 , H04N19/124 , H04N19/17 , H04N19/119 , H04N19/186 , H04N19/159 , H04N19/61
Abstract: A method of video processing is provided. The method includes: determining, for a conversion between a current video unit of a video and a coded representation of the video, that applicability of a first coding tool and a second coding tool is mutually exclusive; and performing the conversion based on the determining, wherein the first coding tool corresponds to an adaptive color space transformation (ACT) tool; wherein use of the ACT tool comprises: converting, during encoding a representation of a visual signal from a first color domain to a second color domain, or converting during decoding, a representation of a visual signal from the second color domain to the first color domain.
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公开(公告)号：US20210329291A1
公开(公告)日：2021-10-21
申请号：US17360812
申请日：2021-06-28
Inventor： Jizheng XU , Jiahao LI , Weijia ZHU , Kai ZHANG , Li ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/543 , H04N19/513 , H04N19/137 , H04N19/176
Abstract: Methods, systems and device for hash-based motion estimation in video coding are described. An exemplary method of video processing includes determining, for a conversion between a current block of a video and a bitstream representation of the video, motion information associated with the current block using a hash-based motion search, a size of the current block being M×N, M and N being positive integers and M being not equal to N, applying, based on the motion information and a video picture comprising the current block, a prediction for the current block, and performing, based on the prediction, the conversion.
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公开(公告)号：US20220368898A1
公开(公告)日：2022-11-17
申请号：US17852934
申请日：2022-06-29
Applicant: Bytedance Inc.
Inventor： Weijia ZHU , Li ZHANG , Jizheng XU , Kai ZHANG , Ye-kui WANG
IPC: H04N19/117 , H04N19/82 , H04N19/186 , H04N19/176
Abstract: A method of video processing, including performing a conversion between a video unit of a video and a bitstream representation of the video, wherein the conversion includes applying a deblocking filter to at least some samples on boundaries of the video unit, wherein deblocking quantization parameter (QP) values used in the deblocking filter are determined according to a rule, and wherein the rule specifies that whether the deblocking QP values are equal to dequantization QP values for the video unit is based on whether an adaptive color transform (ACT) mode is applied to the video unit.
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