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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：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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公开(公告)号：US20220210419A1
公开(公告)日：2022-06-30
申请号：US17698968
申请日：2022-03-18
Applicant: Bytedance Inc.
Inventor： Weijia ZHU , Jizheng XU , Li ZHANG
IPC: H04N19/124 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/70
Abstract: Methods, systems, and devices for quantization parameter derivation in palette mode coding and decoding are described. An example method for video processing includes determining, for a conversion between a current block of a video and a bitstream representation of the video, that the current block is coded using a palette mode and an escape symbol value is signaled in the bitstream representation, and performing, based on the determining, the conversion, wherein a clipped quantization parameter for the current block is used in the conversion, and wherein the clipped quantization parameter used for a chroma component of the video is derived based on a quantization parameter subsequent to a mapping operation of a quantization process or a dequantization process.
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公开(公告)号：US20220182636A1
公开(公告)日：2022-06-09
申请号：US17578703
申请日：2022-01-19
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 video processing are described. An exemplary method for video processing includes determining, for a block of a video, a quantization parameter associated with the block, coding the block of the video into a bitstream representation of the video as a palette coded block in part based on a modified value of the quantization parameter, and signaling coded information related to the quantization parameter in the bitstream representation.
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公开(公告)号：US20220182622A1
公开(公告)日：2022-06-09
申请号：US17681054
申请日：2022-02-25
Inventor： Jiexi WANG , Jizheng XU , Weijia ZHU , Li ZHANG , Yue WANG
IPC: H04N19/117 , H04N19/80 , H04N19/186 , H04N19/176
Abstract: Chroma deblocking harmonization for video coding are described. In an exemplary aspect, a method for video processing includes determining, for a conversion between of a first colour component of a current block of a video and a bitstream representation of the first colour component of the current block of the video, one or more deblocking parameters associated with the first colour component involved in a deb locking filter process based on one or more quantization parameters (QP) associated with a second colour component of the current block of the video; and performing the conversion based on the determined deblocking parameters.
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Patent Agency Ranking
公开(公告)号：US20220060704A1
公开(公告)日：2022-02-24
申请号：US17519269
申请日：2021-11-04
Inventor： Jiexi WANG , Jizheng XU , Jaehong CHON , Weijia ZHU , Li ZHANG , Yue WANG
IPC: H04N19/117 , H04N19/176 , H04N19/186 , H04N19/86
Abstract: A method for processing video data is described and the method includes: deriving, for a conversion between a video processing unit of the video and a bitstream of the video processing unit, at least one deblocking filter associated with a chroma deblocking filter process of the video processing unit; applying a same deblocking filter from the at least one deblocking filter for all chroma components of the video processing unit; and performing the conversion based on the same deblocking filter.
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公开(公告)号：US20220038717A1
公开(公告)日：2022-02-03
申请号：US17502202
申请日：2021-10-15
Applicant: Bytedance Inc.
Inventor： Weijia ZHU , Li ZHANG , Jizheng XU
IPC: H04N19/176 , H04N19/11 , H04N19/70 , H04N19/157
Abstract: Devices, systems and methods for coefficient coding in transform skip mode are described. An exemplary method for visual media processing includes making a decision, for encoding a current video block in a video region of a visual media data into a bitstream representation of the visual media data, regarding an application of an intra block copy (IBC) mode based on or inferred from at least a coding tree structure associated with the current video block; and selectively including, in the bitstream representation, a syntax element indicative of the application of the IBC mode based on or inferred from at least the coding tree structure.
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公开(公告)号：US20210329293A1
公开(公告)日：2021-10-21
申请号：US17360902
申请日：2021-06-28
Inventor： Jizheng XU , Jiahao LI , Weijia ZHU , Kai ZHANG , Li ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/56 , H04N19/176 , H04N19/139 , H04N19/52
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：US20230291894A1
公开(公告)日：2023-09-14
申请号：US18321426
申请日：2023-05-22
Inventor： Li ZHANG , Jizheng XU , Kai ZHANG , Hongbin LIU , Weijia ZHU , Yue WANG
IPC: H04N19/105 , H04N19/176 , H04N19/186 , H04N19/189
CPC classification number: H04N19/105 , H04N19/176 , H04N19/186 , H04N19/189
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 a first coding tool is used based on a rule for the current video block; and performing the conversion according to the determining, wherein the first coding tool includes transforming a representation of a visual signal between two color spaces, and where the rule specifies that a first quantization parameter (QP) offset for a luma channel of the current video block is equal to K1 and a second QP offset for a first chroma channel of the current video block is K1+O, where K1 and O are integers.
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公开(公告)号：US20230060824A1
公开(公告)日：2023-03-02
申请号：US17580446
申请日：2022-01-20
Inventor： Weijia ZHU , Li ZHANG , Jizheng XU , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/159 , H04N19/139 , H04N19/105 , H04N19/186 , H04N19/176
Abstract: Devices, systems and methods for video processing are described. An example method for video processing includes performing a conversion between a video comprising luma blocks and corresponding chroma blocks and a bitstream representation of the video according to a rule that specifies that, for a case that a current luma block is coded using a palette coding mode and a corresponding current chroma block coded with a derived mode, the current luma block is treated as having a default intra prediction mode and the current chroma block is coded with the default intra prediction mode.
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