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公开(公告)号：US20230217024A1
公开(公告)日：2023-07-06
申请号：US18151842
申请日：2023-01-09
Inventor： Jizheng Xu , Zhipin Deng , Li Zhang , Hongbin Liu , Kai Zhang
IPC: H04N19/119 , H04N19/11 , H04N19/96 , H04N19/159 , H04N19/176
CPC classification number: H04N19/119 , H04N19/11 , H04N19/96 , H04N19/159 , H04N19/176
Abstract: A method of video processing is described. The method includes performing a conversion between a chroma block of a video region of a video picture of a video and a coded representation of the video according to a rule. The rule specifies that, due to the chroma block having a size M×N, the chroma block is disallowed to be represented in the coded representation using an intra coding mode. M and N are integers that indicate a width and a height of the chroma block, respectively. The intra coding mode includes coding the chroma block based on a previously coded video region of the video picture.
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公开(公告)号：US11683476B2
公开(公告)日：2023-06-20
申请号：US17582351
申请日：2022-01-24
Inventor： Jizheng Xu , Li Zhang , Kai Zhang , Hongbin Liu
IPC: H04N11/02 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/169
CPC classification number: H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/1883
Abstract: A method for video processing is described. The method comprises: making a decision, for a conversion between a current video block of a video picture of a video and a coded representation of the video, regarding a size of a reference region of the video picture from which reference samples are used for predicting the current video block, based on a size of a virtual pipeline data unit (VPDU), a size of a coding tree block (CTB), or a size of a coding tree unit (CTU); and performing the conversion based on the decision.
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公开(公告)号：US11671586B2
公开(公告)日：2023-06-06
申请号：US17358568
申请日：2021-06-25
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176
CPC classification number: H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176
Abstract: Devices, systems and methods for digital video coding, which includes using default motion candidates for video coding, are described. An exemplary method for video processing includes inserting, for a conversion between a block of a video and a bitstream representation of the video, at least one past motion candidate in a table of past motion candidates to a motion candidate list. The table of past motion candidates is derived based on past conversions. The method includes determining, after the at least one past motion candidate is inserted, that a motion candidate is not to be added to the motion candidate list. The motion candidate is derived based on the table of past motion candidates. The method also includes performing the conversion based on the motion candidate list.
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公开(公告)号：US20230164348A1
公开(公告)日：2023-05-25
申请号：US18158280
申请日：2023-01-23
Inventor： Li Zhang , Jizheng Xu , Kai Zhang , Hongbin Liu
IPC: H04N19/52 , H04N19/105 , H04N19/139 , H04N19/70 , H04N19/176 , H04N19/159
CPC classification number: H04N19/52 , H04N19/105 , H04N19/139 , H04N19/70 , H04N19/176 , H04N19/159
Abstract: Methods, devices and systems for intra-block coding based decoding or encoding of video while using block vector signaling and/or merge candidates are disclosed. An example method for video processing includes performing a conversion between a video region of a video and a bitstream representation of the video, wherein the bitstream representation selectively includes motion vector difference (MVD) related syntax elements for an intra block copy (IBC) advanced motion vector prediction (AMVP) mode based on a maximum number of a first type of IBC candidates used during the conversion of the video region, wherein, when an IBC mode is applied, samples of the video region are predicted from other samples in a video picture corresponding to the video region.
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公开(公告)号：US20230156192A1
公开(公告)日：2023-05-18
申请号：US18154333
申请日：2023-01-13
Inventor： Jizheng Xu , Kai Zhang , Li Zhang , Hongbin Liu , Zhipin Deng , Yue Wang
IPC: H04N19/122 , H04N19/103 , H04N19/132 , H04N19/172 , H04N19/176 , H04N19/18 , H04N19/186 , H04N19/30 , H04N19/46 , H04N19/60
CPC classification number: H04N19/122 , H04N19/103 , H04N19/132 , H04N19/172 , H04N19/176 , H04N19/18 , H04N19/186 , H04N19/30 , H04N19/46 , H04N19/60 , H04N19/124
Abstract: Methods, systems, and devices for coefficient scaling for high-precision image and video coding are described. An example method of video processing includes performing a conversion between a current block of a video and a bitstream representation of the video according to a rule. The rule specifies that the conversion includes during encoding, skipping applying a forward transform to residual coefficients of the current block prior to including in the bitstream representation, or during decoding, reconstructing residual coefficients of the current block from the bitstream representation without applying an inverse transform. The rule further specifies that a scale factor is applied to the residual coefficients independent of a size of the current block.
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Patent Agency Ranking
公开(公告)号：US11632566B2
公开(公告)日：2023-04-18
申请号：US17317452
申请日：2021-05-11
Inventor： Hongbin Liu , Li Zhang , Kai Zhang , Jizheng Xu , Yue Wang
IPC: H04N19/517 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/137 , H04N19/139 , H04N19/196 , H04N19/513 , H04N19/573 , H04N19/577
Abstract: A method for processing a video includes performing a conversion between a current block of visual media data and a corresponding coded representation of the visual media data, wherein the conversion of the current block includes determining whether a use of one or both of a bi-directional optical flow (BIO) technique or a decoder-side motion vector refinement (DMVR) technique to the current block is enabled or disabled, and wherein the determining the use of the BIO technique or the DMVR technique is based on a cost criterion associated with the current block.
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公开(公告)号：US20230116187A1
公开(公告)日：2023-04-13
申请号：US17994085
申请日：2022-11-25
Inventor： Kai Zhang , Zhipin Deng , Hongbin Liu , Li Zhang , Jizheng Xu
IPC: H04N19/119 , H04N19/174 , H04N19/176 , H04N19/70 , H04N19/169 , H04N19/46
Abstract: An example method of video processing includes partitioning, for a conversion between a current video block of a picture of a video and a bitstream of the video, the picture into one or more slices according to a requirement of bitstream conformance. The requirement of bitstream conformance specifies that a union of the one or more slices covers the whole picture, and a first syntax element is included in the bitstream to indicate whether the one or more slices have a rectangular shape. The method also includes performing the conversion at least based on the partitioning.
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公开(公告)号：US20230099893A1
公开(公告)日：2023-03-30
申请号：US17962861
申请日：2022-10-10
Inventor： Jizheng Xu , Zhipin Deng , Li Zhang , Hongbin Liu , Kai Zhang
IPC: H04N19/132 , H04N19/186 , H04N19/176 , H04N19/70
Abstract: A method of video processing includes performing a conversion between a video including a video region and a bitstream of the video according to a rule. The rule specifies a relationship between enablement of a palette mode and a coding type of the video region. The video region may represent a coding block of the video.
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公开(公告)号：US11616978B2
公开(公告)日：2023-03-28
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 , H04N19/139 , H04N19/176 , H04N19/52 , H04N19/105 , H04N19/147 , H04N19/513 , H04N19/537 , H04N19/137 , H04N19/543 , H04N19/132 , H04N19/567
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：US11616973B2
公开(公告)日：2023-03-28
申请号：US17506539
申请日：2021-10-20
Inventor： Li Zhang , Jizheng Xu , Kai Zhang , Hongbin Liu
IPC: H04N19/52 , H04N19/70 , H04N19/105 , H04N19/139 , H04N19/159 , H04N19/176
Abstract: Methods, devices and systems for intra-block coding based decoding or encoding of video while using block vector signaling and/or merge candidates are disclosed. An example method for video processing includes performing a conversion between a video region of a video and a bitstream representation of the video, wherein the bitstream representation selectively includes motion vector difference (MVD) related syntax elements for an intra block copy (IBC) advanced motion vector prediction (AMVP) mode based on a maximum number of a first type of IBC candidates used during the conversion of the video region, wherein, when an IBC mode is applied, samples of the video region are predicted from other samples in a video picture corresponding to the video region.
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