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公开(公告)号：US20210385446A1
公开(公告)日：2021-12-09
申请号：US17399839
申请日：2021-08-11
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Hsiao Chiang CHUANG , Zhipin DENG
IPC: H04N19/117 , H04N19/70 , H04N19/176 , H04N19/132
Abstract: Devices, systems and methods for adaptive loop filtering are described. In an exemplary aspect, a method for video processing includes performing, for a current video block of a video, a filtering process that uses filter coefficients and comprises two or more operations with at least one intermediate result, applying a clipping operation to the at least one intermediate result, and performing, based on the at least one intermediate result, a conversion between the current video block and a bitstream representation of the video, wherein the at least one intermediate result is based on a weighted sum of the filter coefficients and differences between a current sample of the current video block and neighboring samples of the current sample.
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公开(公告)号：US20220038687A1
公开(公告)日：2022-02-03
申请号：US17502233
申请日：2021-10-15
Applicant: Bytedance Inc.
Inventor： Weijia ZHU , Li ZHANG , Jizheng XU , Hsiao Chiang CHUANG
IPC: H04N19/105 , H04N19/159 , H04N19/70 , H04N19/176
Abstract: Video coding and decoding methods are described. In example method includes performing a conversion between a current video block of a video and a bitstream representation of the current video block by determining a first intra coding mode to be stored which is associated with the current video block using a differential coding mode, where the first intra coding mode associated with the current video block is determined according to a second prediction mode used by the differential coding mode, and where, in the differential coding mode, a difference between a quantized residual of an intra prediction of the current video block and a prediction of the quantized residual is represented in the bitstream representation for the current video block using a differential pulse coding modulation (DPCM) representation.
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公开(公告)号：US20210112284A1
公开(公告)日：2021-04-15
申请号：US17128965
申请日：2020-12-21
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Hsiao Chiang CHUANG , Yue WANG
IPC: H04N19/96 , H04N19/119 , H04N19/513 , H04N19/132 , H04N19/13 , H04N19/176
Abstract: Devices, systems and methods for picture border coding are described. In a representative aspect, a method for processing picture includes segmenting a picture into one or multiple picture segments, determining that a first block of a picture segment covers at least one region that is outside a border of the picture segment, wherein a size of the first block is M×N pixels, selecting a second block of size K×L pixels, where (K≤M and L
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公开(公告)号：US20210092378A1
公开(公告)日：2021-03-25
申请号：US17110009
申请日：2020-12-02
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Hsiao Chiang CHUANG , Yue WANG
IPC: H04N19/119 , H04N19/189 , H04N19/176
Abstract: Methods, systems and devices for using flexible and efficient partitioning techniques, and in particular, sub-block shapes in extended quadtree partitioning, 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, where a size of the current visual media block is M×N, and the size of the at least one sub-block is based on a minimum value between M and N, or a maximum value between M and N; 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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公开(公告)号：US20220286672A1
公开(公告)日：2022-09-08
申请号：US17825998
申请日：2022-05-26
Applicant: Bytedance Inc.
Inventor： Weijia ZHU , Jizheng XU , Li ZHANG , Hsiao Chiang CHUANG , Kui FAN
IPC: H04N19/105 , H04N19/176 , H04N19/147
Abstract: A method of video processing is described. The method includes performing a conversion between a current block of a video and a bitstream representation of the video, wherein the current block is coded with a dictionary-based coding mode using one or more dictionaries, and wherein the conversion is based on the one or more dictionaries.
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Patent Agency Ranking
公开(公告)号：US20220217408A1
公开(公告)日：2022-07-07
申请号：US17671422
申请日：2022-02-14
Applicant: Bytedance Inc.
Inventor： Weijia ZHU , Jizheng XU , Li ZHANG , Hsiao Chiang CHUANG
IPC: H04N19/70 , H04N19/132 , H04N19/186 , H04N19/176
Abstract: Methods, systems, and devices for performing entropy coding for the palette escape symbol in palette mode coding and decoding are described. An example method for video processing includes performing a conversion between a video comprising one or more video regions comprising a current video block and a bitstream representation of the video, wherein the bitstream representation conforms to a format rule that the current video block is coded using a palette mode coding tool, wherein a binarization of an escape symbol for the current video block uses an exponential-Golomb (EG) code of order K, wherein K is a non-negative integer that is unequal to three, and wherein the palette mode coding tool represents the current video block using a palette of representative color values and wherein the escape symbol is used for a sample of the current video block coded without using the representative color values.
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公开(公告)号：US20210120243A1
公开(公告)日：2021-04-22
申请号：US17110052
申请日：2020-12-02
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Hsiao Chiang CHUANG , Yue WANG
IPC: H04N19/119 , H04N19/96 , H04N19/169 , H04N19/176
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 more than four sub-blocks; decoding, based on a bitstream representation, the more than four sub-blocks; and decoding, based on the more than four sub-blocks and the partitioning process, the current visual media block. Another exemplary method for visual media encoding includes receiving input data associated with a current visual media block; applying, to the input data, a partitioning process that splits the current visual media block into more than four sub-blocks; encoding, based on the partitioning process, the more than four sub-blocks; and generating, based on the encoding, a bitstream representation of the current visual media block.
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公开(公告)号：US20220182655A1
公开(公告)日：2022-06-09
申请号：US17671486
申请日：2022-02-14
Applicant: Bytedance Inc.
Inventor： Weijia ZHU , Jizheng XU , Li ZHANG , Hsiao Chiang CHUANG
IPC: H04N19/50 , H04N19/186 , H04N19/176 , H04N19/136 , H04N19/132 , H04N19/169 , H04N19/159 , H04N19/119 , H04N19/124 , H04N19/70
Abstract: Methods, systems, and devices for using palette mode with different partition structures are described. An example method for video processing includes maintaining, for a conversion between a video comprising one or more video regions comprising a current video block and a bitstream representation of the video, a palette prediction table for a prediction of a palette used in a palette mode coding tool used for the current video block, making a determination that a local dual tree coding is applied to the conversion, modifying, based on the determination, the palette prediction table, and performing, based on the palette prediction table subsequent to the modifying, the conversion, wherein the palette mode coding tool represents the current video block using a palette of representative color values, and wherein the local dual tree coding enables partitioning of chroma blocks independently from corresponding luma blocks based on a block size.
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公开(公告)号：US20210385459A1
公开(公告)日：2021-12-09
申请号：US17411296
申请日：2021-08-25
Applicant: Bytedance Inc.
Inventor： Weijia ZHU , Li ZHANG , Jizheng XU , Hsiao Chiang CHUANG
IPC: H04N19/132 , H04N19/159 , H04N19/70 , H04N19/186 , H04N19/176
Abstract: Video coding and decoding methods are described. An example method includes determining, based on an applicability rule, that a differential coding mode is applicable to a conversion between a chroma video block of a video and a bitstream representation of the chroma video block, and performing, based on the determining, the conversion between the chroma video block and the bitstream representation of the chroma video block using the differential coding mode, where the chroma video block is represented in the bitstream representation using a difference between a quantized residual of an intra prediction of the chroma video block and a prediction of the quantized residual in the differential coding mode, where the intra prediction is performed in a first direction and the prediction of the quantized residual is performed in a second direction, and where the difference is represented using a differential pulse coding modulation (DPCM) 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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