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公开(公告)号：US20230071429A1
公开(公告)日：2023-03-09
申请号：US17897998
申请日：2022-08-29
Inventor： Ye-kui Wang , Zhipin Deng , Li Zhang , Kai Zhang , Jizheng Xu
IPC: H04N19/70 , H04N19/46 , H04N19/169 , H04N19/174
Abstract: A video processing method includes performing a conversion between a video including one or more pictures and a bitstream of the video. The bitstream conforms to a format rule specifying that one or more syntax elements indicative of coding information are selectively included in a picture parameter set of the bitstream responsive to whether it is indicated that each picture referring to the picture parameter set includes a single slice.
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公开(公告)号：US11601652B2
公开(公告)日：2023-03-07
申请号：US17684630
申请日：2022-03-02
Inventor： Jizheng Xu , Zhipin Deng , Li Zhang , Hongbin Liu , Kai Zhang
IPC: H04N19/157 , H04N19/174 , H04N19/186 , H04N19/503 , H04N19/176 , H04N19/169 , H04N19/119 , H04N19/46 , H04N9/64
Abstract: A method of video processing is described. The method includes determining, for a conversion between a video region of a video and a coded representation of the video, an intra coding characteristic of the video region based on a color format of the video according to a rule; and performing the conversion according to the intra coding characteristic.
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公开(公告)号：US11595657B2
公开(公告)日：2023-02-28
申请号：US17338564
申请日：2021-06-03
Inventor： Hongbin Liu , Li Zhang , Kai Zhang , Jizheng Xu , Yue Wang
IPC: H04N19/176 , H04N19/132 , H04N19/105 , H04N19/159 , H04N19/186 , H04N19/513
Abstract: A method for video processing includes performing a conversion between a current video block and a bitstream representation of the current video block using an inter-prediction coding scheme based on an n-order polynomial model using a first variable associated with the current video block, where n is an integer greater than or equal to zero, wherein the conversion includes generating the current video block from the bitstream representation or generating the bitstream representation from the current video block; and performing illumination compensation for the current video block using the n-order polynomial model during the conversion.
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公开(公告)号：US20230027555A1
公开(公告)日：2023-01-26
申请号：US17892746
申请日：2022-08-22
Inventor： Kai Zhang , Li Zhang , Ye-kui Wang , Zhipin Deng , Kui Fan , Jizheng Xu , Hongbin Liu
IPC: H04N19/174 , H04N19/70 , H04N19/172 , H04N19/119 , H04N19/129 , H04N19/176 , H04N19/96
Abstract: Techniques for video processing, including video coding, video decoding and video transcoding are described. One example method includes performing a conversion between a video including a video picture including a video tile including one or more slices and a bitstream of the video according to a rule. The rule specifies that a second slice in a tile that includes a first slice in a picture has a height that is represented in a unit of coding tree units. The first slice has a first slice index, and the second slice has a second slice index that is determined based on the first slice index and a number of explicitly provided slice heights in the video tile. The height of the second slice is determined based on the first slice index and the second slice index.
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公开(公告)号：US11563973B2
公开(公告)日：2023-01-24
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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Patent Agency Ranking
公开(公告)号：US11563972B2
公开(公告)日：2023-01-24
申请号：US17167192
申请日：2021-02-04
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/513 , H04N19/176 , H04N19/184 , H04N19/52
Abstract: Devices, systems, and methods for digital video coding, which includes constructing separate motion candidate lists for video coding, are described. An exemplary method for video processing includes constructing, for a first video block of a video, a first motion candidate list using a first motion candidate list construction method that excludes motion candidates that are only derived from temporal blocks, and performing a conversion between the first video block and a bitstream representation of the video including the first video block according to the constructed first motion candidate list.
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公开(公告)号：US20230020259A1
公开(公告)日：2023-01-19
申请号：US17947909
申请日：2022-09-19
Inventor： Jizheng Xu , Li Zhang , Kai Zhang , Hongbin Liu
IPC: H04N19/11 , H04N19/176 , H04N19/132 , H04N19/159 , H04N19/593 , H04N19/105
Abstract: Methods and apparatus for video processing are described. One example method includes determining, for a conversion between a video block of a video and a bitstream of the video, that the video block satisfies a condition. The video block is coded in the bitstream using an intra block copy mode. The method further includes performing the conversion based on the determining. Here, due to the video block satisfying the condition, a portion of an intra block copy buffer is reset during the conversion.
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公开(公告)号：US11546599B2
公开(公告)日：2023-01-03
申请号：US17362341
申请日：2021-06-29
Inventor： Jizheng Xu , Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/132 , H04N19/176 , H04N19/423 , H04N19/96
Abstract: A method of visual media processing includes determining, for a conversion between a current video block of visual media data and a bitstream representation of the current video block, a buffer that stores reference samples for prediction in an intra block copy mode; for a sample spatially located at location of the current video block relative to an upper-left position of a coding tree unit including the current video block and having a block vector, computing a corresponding reference in the buffer at a reference location, wherein the reference location is determined using the block vector and the location; and upon determining that the reference location lies outside the buffer, re-computing the reference location based at least in part on a location of the current video block relative to the coding tree unit including the current video block.
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公开(公告)号：US11546581B2
公开(公告)日：2023-01-03
申请号：US17384246
申请日：2021-07-23
Inventor： Jizheng Xu , Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/176 , H04N19/423 , H04N19/593 , H04N19/105
Abstract: A method of visual media processing includes determining, for a conversion between a current video block of visual media data and a bitstream representation of the current video block, a buffer that stores reference samples for prediction in an intra block copy mode; for a sample spatially located at location of the current video block relative to an upper-left position of a coding tree unit including the current video block and having a block vector, computing a corresponding reference in the buffer at a reference location, wherein the reference location is determined using the block vector and the location; and upon determining that the reference location lies outside the buffer, re-computing the reference location based at least in part on a location of the current video block relative to the coding tree unit including the current video block.
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公开(公告)号：US11539950B2
公开(公告)日：2022-12-27
申请号：US17711319
申请日：2022-04-01
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 performing a conversion between a video comprising one or more pictures and a bitstream representation of the video. The bitstream representation is required to conform to a format rule that specifies that each picture is coded as one or more slices. The format rule prohibits samples in a picture from not being covered by any of the one or more slices.
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