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公开(公告)号：US20220264087A1
公开(公告)日：2022-08-18
申请号：US17737260
申请日：2022-05-05
Inventor： Li ZHANG , Jizheng XU , Kai ZHANG , Hongbin LIU , Weijia ZHU , Yue WANG
IPC: H04N19/105 , H04N19/189 , H04N19/186 , H04N19/176
Abstract: A method of video processing includes determining, for a conversion between a video component of a video comprising a current video block and a bitstream representation of the video, that an adaptive color space transformation (ACT) tool is used based on a rule for the current video block; and performing the conversion according to the determining, and wherein the rule specifies to use a same constant quantization parameter (QP) offset for each of one or more color component of the current video block.
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公开(公告)号：US20220256148A1
公开(公告)日：2022-08-11
申请号：US17723089
申请日：2022-04-18
Inventor： Kai ZHANG , Zhipin DENG , Hongbin LIU , Li ZHANG , Jizheng XU
IPC: H04N19/119 , H04N19/132 , H04N19/176 , H04N19/70
Abstract: An example method of video processing includes performing a conversion between a picture of a video and a bitstream representation of the video. The picture includes one or more sub-pictures, and the bitstream representation conforms to a format rule that specifies that a length of a syntax element is equal to Ceil(Log 2(SS)) bits. SS is greater than 0, and the syntax element indicating a horizontal or a vertical position of a top-left corner of a coding tree unit of a sub-picture of the picture.
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公开(公告)号：US20220239932A1
公开(公告)日：2022-07-28
申请号：US17714480
申请日：2022-04-06
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/186 , H04N19/117 , H04N19/159 , H04N19/70
Abstract: A method for video processing is provided to include: performing a conversion between a current video block of a video and a coded representation of current video block, wherein the conversion uses a coding mode in which the current video block is constructed based on a first domain and a second domain and/or chroma residue is scaled in a luma-dependent manner, and wherein information used for the coding mode is signaled in a parameter set that is different from a sequence parameter set (SPS), a video parameter set (VPS), a picture parameter set (PPS), or an adaptation parameter set (APS) used for carrying adaptive loop filtering (ALF) parameters.
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公开(公告)号：US20220232227A1
公开(公告)日：2022-07-21
申请号：US17714541
申请日：2022-04-06
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Jizheng XU , Yue WANG
IPC: H04N19/159 , H04N19/132 , H04N19/176 , H04N19/96 , H04N19/184 , H04N19/52 , H04N19/56 , H04N19/593
Abstract: A method for video processing is provided to include determining, for a conversion between a current video block of a video and a coded representation of the video, whether an intra block copy (IBC) mode in which a prediction block for the current video block is calculated based on a block vector in a picture that includes current video block is enabled based on a rule on a block dimension; and performing the conversion based on the determining.
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公开(公告)号：US20220232224A1
公开(公告)日：2022-07-21
申请号：US17699032
申请日：2022-03-18
Inventor： Jizheng XU , Kai ZHANG , Li ZHANG , Hongbin LIU , Zhipin DENG , Yue WANG
IPC: H04N19/157 , H04N19/176 , H04N19/18 , H04N19/30 , H04N19/60 , H04N19/124 , H04N19/132
Abstract: Methods, systems, and devices for high-precision transform and quantization for image and video coding are described. A example method of video processing includes determining, for a conversion between a video comprising a current block and a bitstream representation of the video, that the conversion comprises an application of a transform to the current block, and performing, based on the determining, the conversion, wherein a bit-shifting operation of a scaling process for transform coefficients associated with the transform is based on whether the current block is coded with a block-based differential pulse code modulation (BDPCM) mode.
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Patent Agency Ranking
公开(公告)号：US20220232207A1
公开(公告)日：2022-07-21
申请号：US17699021
申请日：2022-03-18
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Zhipin DENG , Jizheng XU , Yue WANG
IPC: H04N19/105 , H04N19/132 , H04N19/159 , H04N19/186 , H04N19/176 , H04N19/70
Abstract: An example method of video processing includes determining, for a conversion between a current picture of a video and a coded representation of the video, a position of a reference sample in a reference picture that is associated with the current picture based on a top-left position of a window of a picture. The picture includes at least the current picture or the reference picture, and the window is subject to a processing rule during the conversion. The method also includes performing the conversion based on the determining.
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公开(公告)号：US20220224887A1
公开(公告)日：2022-07-14
申请号：US17702318
申请日：2022-03-23
Inventor： Jizheng XU , Li ZHANG , Kai ZHANG , Hongbin LIU
IPC: H04N19/105 , H04N19/139 , H04N19/176 , H04N19/96
Abstract: A method of video processing is described. The method includes determining, for a conversion between a current video block of a video picture of a video and a coded representation of the video, whether or how to reset reference sample values of a reference region of the video picture used for predicting the current video block according to a rule; and performing the conversion based on the determining.
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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：US20220217382A1
公开(公告)日：2022-07-07
申请号：US17698141
申请日：2022-03-18
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/46 , H04N19/70 , H04N19/169 , H04N19/176
Abstract: A method of visual media processing, including: determining, for a current video block, a motion vector for use in a sub-block based motion vector prediction (sbTMVP) process to locate a correspondingblock in a collocated picture for a conversionbetweenthe currentvideo block and a bitstream representation of the current video block, wherein the motion vector used in the sbTMVP process is computed in accordance with a scaling operation; and performing based on using the motion vector, the conversion between the current video block and the bitstream representation of the visual media data.
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公开(公告)号：US20220210448A1
公开(公告)日：2022-06-30
申请号：US17694305
申请日：2022-03-14
Applicant: Bytedance Inc.
Inventor： Weijia ZHU , Li ZHANG , Jizheng XU
IPC: H04N19/186 , H04N19/176 , H04N19/70 , H04N19/174 , H04N19/117 , H04N19/124
Abstract: An example method of video processing includes determining, for a conversion between a current block of a video and a bitstream representation of the video, whether to enable usage of a chroma quantization parameter (QP) offset for the current block according to a syntax element at a level of a video unit. The video unit includes the current block and a second block of the video. The method also includes performing the conversion based on the determining.
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