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公开(公告)号：US12075094B2
公开(公告)日：2024-08-27
申请号：US17494934
申请日：2021-10-06
Applicant: Bytedance Inc.
Inventor： Weijia Zhu , Li Zhang , Jizheng Xu
IPC: H04N19/70 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/96
CPC classification number: H04N19/70 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/96
Abstract: Devices, systems and methods for coefficient coding in transform skip mode are described. An exemplary method for visual media processing includes: for encoding a current video block in a video region of a visual media data into a bitstream representation of the visual media data, identifying usage of a coding mode and/or an intra prediction mode and/or a set of allowable intra prediction modes; and upon identifying the usage, making a decision of whether to include or exclude, in the bitstream representation, a syntax element indicative of selectively applying a transform skip mode to the current video block, wherein, in the transform skip mode, a residual of a prediction error between the current video block and a reference video block is represented in the bitstream representation of the visual media data without applying a transformation.
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公开(公告)号：US12063356B2
公开(公告)日：2024-08-13
申请号：US17994095
申请日：2022-11-25
Inventor： Weijia Zhu , Li Zhang , Jizheng Xu , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/186
CPC classification number: H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/186
Abstract: Devices, systems and methods for video processing 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, a number of intra-coded neighboring blocks of the current block for a combined inter and intra prediction mode according to a rule that specifies that a first block coded using a first prediction mode is treated as a non-intra block to be excluded from counting of the number of intra-coded neighboring blocks. In the first prediction mode, reconstructed samples are represented by a set of representative color values, and the set of representative color values comprises at least one of 1) palette predictors, 2) escaped samples, or 3) palette information included in the bitstream. The method also includes performing the conversion based on the determining.
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公开(公告)号：US12022121B2
公开(公告)日：2024-06-25
申请号：US17494934
申请日：2021-10-06
Applicant: Bytedance Inc.
Inventor： Weijia Zhu , Li Zhang , Jizheng Xu
IPC: H04N19/70 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/96
CPC classification number: H04N19/70 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/96
Abstract: Devices, systems and methods for coefficient coding in transform skip mode are described. An exemplary method for visual media processing includes: for encoding a current video block in a video region of a visual media data into a bitstream representation of the visual media data, identifying usage of a coding mode and/or an intra prediction mode and/or a set of allowable intra prediction modes; and upon identifying the usage, making a decision of whether to include or exclude, in the bitstream representation, a syntax element indicative of selectively applying a transform skip mode to the current video block, wherein, in the transform skip mode, a residual of a prediction error between the current video block and a reference video block is represented in the bitstream representation of the visual media data without applying a transformation.
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公开(公告)号：US11979610B2
公开(公告)日：2024-05-07
申请号：US17494934
申请日：2021-10-06
Applicant: Bytedance Inc.
Inventor： Weijia Zhu , Li Zhang , Jizheng Xu
IPC: H04N19/70 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/96
CPC classification number: H04N19/70 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/96
Abstract: Devices, systems and methods for coefficient coding in transform skip mode are described. An exemplary method for visual media processing includes: for encoding a current video block in a video region of a visual media data into a bitstream representation of the visual media data, identifying usage of a coding mode and/or an intra prediction mode and/or a set of allowable intra prediction modes; and upon identifying the usage, making a decision of whether to include or exclude, in the bitstream representation, a syntax element indicative of selectively applying a transform skip mode to the current video block, wherein, in the transform skip mode, a residual of a prediction error between the current video block and a reference video block is represented in the bitstream representation of the visual media data without applying a transformation.
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公开(公告)号：US20240146929A1
公开(公告)日：2024-05-02
申请号：US18488254
申请日：2023-10-17
Inventor： Weijia Zhu , Li Zhang , Jizheng Xu , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/132 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/70
CPC classification number: H04N19/132 , H04N19/159 , H04N19/176 , H04N19/186 , 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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Patent Agency Ranking
公开(公告)号：US20240129527A1
公开(公告)日：2024-04-18
申请号：US18527988
申请日：2023-12-04
Applicant: Bytedance Inc.
Inventor： Li Zhang , Weijia Zhu , Jizheng Xu
IPC: H04N19/593 , G06T9/00 , G06T11/00 , G06T11/40 , G06V10/20 , H04N19/105 , H04N19/119 , H04N19/132 , H04N19/159 , H04N19/169 , H04N19/176 , H04N19/186 , H04N19/46
CPC classification number: H04N19/593 , G06T9/004 , G06T11/001 , G06T11/40 , G06V10/20 , H04N19/105 , H04N19/119 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/1883 , H04N19/46
Abstract: In one example aspect, a method of video processing includes performing a conversion between a current block in a video unit of a video and a coded representation of the video using a palette mode in which a palette of representative sample values is used for coding the current block. During the conversion, a predictor palette is used for predicting the palette of representative sample values. The predictor palette is re-initialized upon a condition being satisfied. The condition is satisfied in case the video unit is a first video unit in a video unit row and a syntax element is included in the coded representation indicating that a wavefront parallel processing is enabled for the video unit.
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公开(公告)号：US11943439B2
公开(公告)日：2024-03-26
申请号：US17867284
申请日：2022-07-18
Inventor： Weijia Zhu , Jizheng Xu , Li Zhang , Kai Zhang , Ye-Kui Wang , Yue Wang
IPC: H04N19/00 , H04N19/12 , H04N19/176 , H04N19/186 , H04N19/196 , H04N19/60 , H04N19/85
CPC classification number: H04N19/12 , H04N19/176 , H04N19/186 , H04N19/197 , H04N19/60 , H04N19/85
Abstract: A method for implementing an adaptive colour transform (ACT) mode during image/video encoding and decoding includes performing a conversion between a current video block of a video and a bitstream of the video, wherein the current video block is coded using the ACT mode, wherein the conversion comprises applying an inverse ACT transform on the current video block according to a rule, and wherein the rule specifies that a clipping operation, based on a bit depth of the current video block, is applied to an input of the inverse ACT transform.
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公开(公告)号：US20240089501A1
公开(公告)日：2024-03-14
申请号：US18506313
申请日：2023-11-10
Inventor： Weijia Zhu , Jizheng Xu , Li Zhang , Yue Wang
IPC: H04N19/60 , H04N19/105 , H04N19/176 , H04N19/186
CPC classification number: H04N19/60 , H04N19/105 , H04N19/176 , H04N19/186
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. 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：US20230362375A1
公开(公告)日：2023-11-09
申请号：US18323149
申请日：2023-05-24
Inventor： Weijia Zhu , Jizheng Xu , Li Zhang , Kai Zhang , Ye-kui Wang , Yue Wang
IPC: H04N19/12 , H04N19/60 , H04N19/196 , H04N19/176 , H04N19/85 , H04N19/186
CPC classification number: H04N19/12 , H04N19/176 , H04N19/186 , H04N19/197 , H04N19/60 , H04N19/85
Abstract: A method for implementing an adaptive colour transform (ACT) mode during image/video encoding and decoding includes performing a conversion between a current video block of a video and a bitstream of the video, wherein the current video block is coded using the ACT mode, wherein the conversion includes applying an inverse ACT transform on the current video block according to a rule, and wherein the rule specifies that a clipping operation, based on a bit depth of the current video block, is applied to an input of the inverse ACT transform.
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公开(公告)号：US20230328234A1
公开(公告)日：2023-10-12
申请号：US18334120
申请日：2023-06-13
Inventor： Weijia Zhu , Li Zhang , Jizheng Xu , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/105 , H04N19/132 , H04N19/176 , H04N19/186 , H04N19/159 , H04N19/139
CPC classification number: H04N19/105 , H04N19/132 , H04N19/176 , H04N19/186 , H04N19/159 , H04N19/139
Abstract: Devices, systems and methods for video processing are described. An exemplary method for video processing includes determining, for a conversion between a current block of a video and a bitstream representation of the video, that a neighboring block of the current block that is coded in a palette mode is processed as an intra-coded block having a default mode during a construction of a list of most probable modes (MPM) candidates of the current block in case the neighboring block is located above or left of the current block. The method also includes performing the conversion based on the determining.
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