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公开(公告)号：US20240007640A1
公开(公告)日：2024-01-04
申请号：US18217429
申请日：2023-06-30
发明人： Xinwei Li , Ru-Ling Liao , Jie Chen , Yan Ye
IPC分类号： H04N19/132 , H04N19/105 , H04N19/176 , H04N19/46 , H04N19/70
CPC分类号： H04N19/132 , H04N19/105 , H04N19/176 , H04N19/46 , H04N19/70
摘要： An input video or video stream may be obtained or received. The input video or video stream may include a plurality of video frames, and each frame may be divided into a plurality of blocks. A current block of the plurality of blocks may be predicted using a planar mode. Depending on which planar mode is used, different reference samples may be used for predicting a current sample in the current block.
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公开(公告)号：US11849117B2
公开(公告)日：2023-12-19
申请号：US17651338
申请日：2022-02-16
发明人： Xinwei Li , Jie Chen , Ru-Ling Liao , Yan Ye
IPC分类号： H04N19/00 , H04N19/132 , H04N19/46 , H04N19/169 , H04N19/186
CPC分类号： H04N19/132 , H04N19/186 , H04N19/1883 , H04N19/46
摘要： The present disclosure provides a video data processing method for cross-component sample adaptive offset (CCSAO). The method includes determining an index based on a vertical coordinate of a chroma sample within a picture; determining a luma sample based on the index; classifying the chroma sample based on a reconstructed value associated with the luma sample; determining an offset based on the classification; and adding the offset to a reconstructed value associated with the chroma sample.
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公开(公告)号：US11924409B2
公开(公告)日：2024-03-05
申请号：US17651639
申请日：2022-02-18
发明人： Xinwei Li , Jie Chen , Ru-Ling Liao , Yan Ye
IPC分类号： H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176
CPC分类号： H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176
摘要： A video processing method includes: determining whether an inter predictor correction is enabled for a coding block; and when the inter predictor correction is enabled for the coding block, performing the inter predictor correction by: obtaining a plurality of predicted samples from a top boundary and a left boundary of a predicted block corresponding to the coding block; obtaining a plurality of reconstructed samples from top neighboring reconstructed samples and left neighboring reconstructed samples of the coding block; and deriving a corrected predicted block based on the plurality of the predicted samples, the plurality of the reconstructed samples and the predicted block.
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公开(公告)号：US20230217030A1
公开(公告)日：2023-07-06
申请号：US18091178
申请日：2022-12-29
发明人： Xinwei Li , Ru-Ling Liao , Jie Chen , Yan Ye
IPC分类号： H04N19/159 , H04N19/70 , H04N19/186 , H04N19/593 , H04N19/11 , H04N19/13 , H04N19/176 , H04N19/132 , H04N19/117
CPC分类号： H04N19/159 , H04N19/70 , H04N19/186 , H04N19/593 , H04N19/11 , H04N19/13 , H04N19/176 , H04N19/132 , H04N19/117
摘要： A VVC-standard encoder and a VVC-standard decoder are provided, implementing a decoder-side chroma intra prediction mode gradient-based derivation method, which improves coding efficiency of chroma intra prediction, thereby saving on signaling cost. A VVC-standard decoder configures one or more processors of a computing system to derive one of multiple possible chroma intra prediction modes by computing gradients of adjacent luma samples and chroma samples of a current chroma block. With minimal increase in signaling cost, the VVC-standard coding and decoding processes are enhanced to base intra prediction modes for chroma blocks on collocated luma block-adjacent reconstructed luma samples adjacent reconstructed chroma samples, enabling prior computational work done on coding and decoding adjacent blocks to be referenced. In this fashion, coding gains can be achieved in matching texture characteristics of the current chroma block based on a texture gradient including adjacent blocks.
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公开(公告)号：US20240223776A1
公开(公告)日：2024-07-04
申请号：US18399650
申请日：2023-12-28
发明人： Xinwei Li , Ru-Ling Liao , Jie Chen , Yan Ye
IPC分类号： H04N19/159 , H04N19/105 , H04N19/117 , H04N19/122 , H04N19/176 , H04N19/70
CPC分类号： H04N19/159 , H04N19/105 , H04N19/117 , H04N19/122 , H04N19/176 , H04N19/70
摘要： Methods and systems implement fusion of intra TMP mode with other intra prediction modes that utilize adjacent samples, to improve prediction accuracy. A VVC-standard encoder and a VVC-standard decoder can configure one or more processors of a computing system to fuse intra TMP mode with different prediction modes, such as spatial geometric partitioning mode (“SGPM”) and combined inter and intra prediction (“CIIP”); to refine an intra TMP prediction block based on adjacent samples, such as using the method of position-dependent intra prediction combination (“PDPC”); to apply local illumination compensation (“LIC”) to refine an intra TMP prediction block; and/or to implement sub-pixel positions, including multiple, different sub-pixel positions, sub-pixel positions in combination with multi-candidate intra TMP, or flip modes in intra TMP to further improve prediction accuracy.
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公开(公告)号：US20240022757A1
公开(公告)日：2024-01-18
申请号：US18346766
申请日：2023-07-03
发明人： Jie Chen , Ru-Ling Liao , Xinwei Li , Yan Ye
IPC分类号： H04N19/513 , H04N19/132 , H04N19/159 , H04N19/176
CPC分类号： H04N19/513 , H04N19/132 , H04N19/159 , H04N19/176
摘要： A VVC-standard encoder and a VVC-standard decoder are provided, implementing application of DMVR on affine merge mode-coded blocks to refine the motion vector accuracy and thereby improve coding efficiency. A refined motion vector (MV) search is performed for a control point motion vector (CPMV) of an inter-coded coding block (CB), outputting a refined MV of the CB. A refined MV search includes deriving a MV of a subblock of the CB based on a CPMV of the CB, performing subblock MV refinement for the MV of the subblock, and outputting the refined MV of the CB based on a refined MV of the subblock. A refined MV search further includes deriving an affine model parameter based on a plurality of CPMVs of the CB, performing an affine parameter offset search for the affine model parameter, and outputting the refined MV of the CB based on an optimal parameter offset.
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公开(公告)号：US11876973B2
公开(公告)日：2024-01-16
申请号：US17658378
申请日：2022-04-07
发明人： Ru-Ling Liao , Yan Ye , Xinwei Li , Jie Chen
IPC分类号： H04N19/119 , H04N19/132 , H04N19/139 , H04N19/157
CPC分类号： H04N19/139 , H04N19/119 , H04N19/132 , H04N19/157
摘要： A method, an apparatus and non-transitory computer-readable storage medium for video data process are provided. The method includes receiving a bitstream comprising a coding unit coded in a geometric partition mode (GPM); decoding a first parameter associated with the coding unit, the first parameter indicating whether template matching being applied to the coding unit; and determining, according to the first parameter, motion information for the coding unit, wherein when the first parameter indicates the template matching is applied to the coding unit, the motion information is refined using the template matching.
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公开(公告)号：US20240007615A1
公开(公告)日：2024-01-04
申请号：US18215753
申请日：2023-06-28
发明人： Ru-Ling Liao , Jie Chen , Yan Ye , Xinwei Li
IPC分类号： H04N19/105 , H04N19/159 , H04N19/172
CPC分类号： H04N19/105 , H04N19/159 , H04N19/172
摘要： A VVC-standard encoder and a VVC-standard decoder are provided, implementing derivation of a BCW index according to cost values based on template matching. A template matching cost can be calculated for each among a set of possible BCW weight values, and a BCW weight value yielding a lowest template matching cost among each template matching cost calculated can be selected as a BCW index for a bi-predicted merge candidate. Alternatively, a template matching cost can be calculated for each among a subset of possible BCW weight values based on an inherited BCW weight. Additionally, a merge candidate BCW index can be derived while adjusting template matching cost of an inherited BCW weight from a value calculated according to the VVC standard and ECM specifications, or while adjusting template matching cost of a BCW weight having equal weight from a value calculated according to the VVC standard and ECM specifications.
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