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公开(公告)号：US20240364885A1
公开(公告)日：2024-10-31
申请号：US18769272
申请日：2024-07-10
发明人： Xiaoyu XIU , Yi-Wen CHEN , Tsung-Chuan MA , Hong-Jheng JHU , Wei CHEN , Che-Wei KUO , Xianglin WANG , Bing YU
IPC分类号： H04N19/12 , H04N19/124 , H04N19/132 , H04N19/18 , H04N19/186 , H04N19/30 , H04N19/60 , H04N19/70
CPC分类号： H04N19/12 , H04N19/124 , H04N19/132 , H04N19/18 , H04N19/186 , H04N19/30 , H04N19/60 , H04N19/70
摘要： An electronic apparatus performs a method of coding video data. The method comprises: receiving, from the bitstream, syntax elements associated with a coding unit, wherein the syntax elements include a first coded block flag (CBF) for residual samples of a first chroma component, a second CBF for residual samples of a second chroma component, and a third syntax element indicating whether adaptive color transform (ACT) is applied to the coding unit; determining whether to perform the chroma residual scaling to the residual samples of the chroma components according to the first CBF, the second CBF, and the third syntax element; in accordance with a determination to perform the chroma residual scaling to the residual samples of the first and second chroma components, scaling the residual samples of the at least one of the first and second chroma components based on a corresponding scaling parameter.
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公开(公告)号：US12132910B2
公开(公告)日：2024-10-29
申请号：US17571434
申请日：2022-01-07
发明人： Xiaoyu Xiu , Yi-Wen Chen , Xianglin Wang , Bing Yu
IPC分类号： H04N19/105 , H04N19/132 , H04N19/137 , H04N19/159 , H04N19/176
CPC分类号： H04N19/137 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176
摘要： Methods, apparatuses, and non-transitory computer-readable storage mediums are provided for video decoding. The method includes dividing a video block to multiple non-overlapped video subblocks, dividing a video block to multiple non-overlapped video subblocks, obtaining a first reference picture I(0) and a second reference picture I(1), obtaining first prediction samples I(0)(i,j)'s, obtaining second prediction samples I(1)(i,j)'s, obtaining horizontal and vertical gradient values of the first prediction samples I(0)(i,j)'s and second prediction samples I(1)(i,j)'s, obtaining motion refinements for samples in the video subblock based on the BDOF when the video block is not coded in affine mode, obtaining motion refinements for samples in the video subblock based on the PROF when the video block is coded in affine mode, and obtaining prediction samples of the video block based on the motion refinements.
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公开(公告)号：US20240348792A1
公开(公告)日：2024-10-17
申请号：US18755670
申请日：2024-06-27
发明人： Xiaoyu XIU , Yi-Wen CHEN , Xianglin WANG , Shuiming YE , Tsung-Chuan MA , Hong-Jheng JHU
IPC分类号： H04N19/137 , H04N19/105 , H04N19/132 , H04N19/176
CPC分类号： H04N19/137 , H04N19/105 , H04N19/132 , H04N19/176
摘要： Methods, apparatuses, and non-transitory computer-readable storage mediums are provided for encoding a video signal. A method may include obtain a first reference picture and a second reference picture associated with a video block, wherein the first reference picture is before a current picture and the second reference picture is after the current picture in display order; obtain first prediction samples of the video block from the first reference picture; obtain second prediction samples of the video block from the second reference picture; obtain padded prediction samples; obtain horizontal and vertical gradient values of the first prediction samples and the second prediction samples based on the padded prediction samples; obtain motion refinements for samples in the video block based on the horizontal and vertical gradient values; and obtain bi-prediction samples of the video block based on the motion refinements.
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4.发明公开公开(公告)号：US20240348785A1
公开(公告)日：2024-10-17
申请号：US18756092
申请日：2024-06-27
发明人： Xiaoyu XIU , Yi-Wen CHEN , Wei CHEN , Han GAO , Che-Wei KUO , Hong-Jheng JHU , Ning YAN , Xianglin WANG , Bing YU
IPC分类号： H04N19/13 , H04N19/174 , H04N19/70
CPC分类号： H04N19/13 , H04N19/174 , H04N19/70
摘要： Methods for video decoding and encoding, apparatuses and non-transitory computer-readable storage media thereof are provided. In one method for video decoding, a binary arithmetic decoder may obtain, according to an adaptive weight, a multi-hypothesis probability for a binary symbol of a context model for the binary arithmetic decoder, where the multi-hypothesis probability indicates a probability of the binary symbol equaling to a binary value, and the binary symbol is from a plurality of binary symbols associated with the context model. Furthermore, the decoder may decode the binary symbol according to the multi-hypothesis probability.
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公开(公告)号：US20240333963A1
公开(公告)日：2024-10-03
申请号：US18737821
申请日：2024-06-07
发明人： Xiaoyu XIU , Wei CHEN , Yi-Wen CHEN , Tsung-Chuan MA , Hong-Jheng JHU , Xianglin WANG , Bing YU
IPC分类号： H04N19/52 , H04N19/132 , H04N19/139 , H04N19/169 , H04N19/17 , H04N19/70
CPC分类号： H04N19/52 , H04N19/132 , H04N19/139 , H04N19/17 , H04N19/1887 , H04N19/70
摘要： An electronic apparatus performs a method of decoding video data. The method comprises: receiving, from a bitstream, a first control flag that indicates merge mode with motion vector difference (MMVD) is enabled for one or more coding units in a video sequence; receiving a first syntax from the video data that identifies a set of motion vector difference (MVD) offsets from a plurality sets of MVD offsets; receiving, a second control flag corresponding to a respective coding unit of the one or more coding units, which indicates the MMVD is applied to the coding unit; receiving a second syntax that selects an MVD offset from the identified set of MVD offsets, and a third syntax that selects an MVD direction; forming MVD based on the selected MVD offset and MVD direction; and reconstructing the coding unit by applying the formed MVD to generate motion vectors to the coding unit.
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公开(公告)号：US20240333952A1
公开(公告)日：2024-10-03
申请号：US18741625
申请日：2024-06-12
发明人： Hong-Jheng JHU , Xiaoyu XIU , Yi-Wen CHEN , Wei CHEN , Che-Wei KUO , Ning YAN , Han GAO , Xianglin WANG , Bing YU
IPC分类号： H04N19/44 , H04N19/159 , H04N19/176
CPC分类号： H04N19/44 , H04N19/159 , H04N19/176
摘要： Methods, apparatuses, and non-transitory computer-readable storage mediums are provided for video coding. In one method, a decoder obtains a signaled flag that indicates whether a template-based intra mode derivation (TIMD) mode is applied on a current video block; and in response to determining that the TIMD mode is applied on the current video block based on the signaled flag, the decoder derives an intra prediction mode from the TIMD mode based on different templates in a reconstruction area for the current video block, wherein the reconstruction area comprises reconstructed neighboring blocks for the current video block.
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公开(公告)号：US20240333951A1
公开(公告)日：2024-10-03
申请号：US18737417
申请日：2024-06-07
发明人： Xianglin WANG , Yi-Wen CHEN , Xiaoyu XIU , Tsung-Chuan MA , Hong-Jheng JHU
IPC分类号： H04N19/44 , H04N19/169 , H04N19/176 , H04N19/70
CPC分类号： H04N19/44 , H04N19/176 , H04N19/188 , H04N19/1883 , H04N19/70
摘要： A computing device performs a method of decoding video data by receiving a bitstream corresponding to video data encoding one or more pictures, wherein the one or more pictures are recursively partitioned into a plurality of groups at different partition levels; determining a first syntax element that corresponds to a first group of the plurality of groups; in accordance with a determination that the first syntax element has a first value: decoding the first group in a first mode and in accordance with a determination that the first syntax element has a second value: determining a respective second syntax element for each of one or more second groups within the first groups, wherein the one or more second groups are at a second partition level below the first partition level and decoding each of the one or more second groups in accordance with a value of the respective second syntax element.
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公开(公告)号：US12108067B2
公开(公告)日：2024-10-01
申请号：US17953233
申请日：2022-09-26
发明人： Hong-Jheng Jhu , Xianglin Wang , Xiaoyu Xiu , Yi-Wen Chen , Tsung-Chuan Ma , Wei Chen , Bing Yu
IPC分类号： H04N19/44 , H04N19/186 , H04N19/46
CPC分类号： H04N19/44 , H04N19/186 , H04N19/46
摘要： An electronic apparatus performs a method of decoding video data. The method comprises: receiving, from the bitstream, a plurality of syntax elements associated with a coding unit, wherein the plurality of syntax elements indicate the coding tree type of the coding unit, and whether the local dual tree mode is enabled for the coding unit; and in accordance with the determination that the coding tree type of the coding unit is a single tree, and the local dual tree mode is enabled for the coding unit: disabling the palette mode for the coding unit when the coding unit has the size equal to or less than a predefined threshold. In some embodiments, disabling palette mode for the coding unit includes: disabling the palette mode for both the luma component and chroma component of the coding unit, or disabling the palette mode for only the chroma component of the coding unit.
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公开(公告)号：US12108047B2
公开(公告)日：2024-10-01
申请号：US17541102
申请日：2021-12-02
发明人： Yi-Wen Chen , Xiaoyu Xiu , Tsung-Chuan Ma , Hong-Jheng Jhu , Shuiming Ye , Xianglin Wang
IPC分类号： H04N19/137 , H04N19/105 , H04N19/172 , H04N19/176
CPC分类号： H04N19/137 , H04N19/105 , H04N19/172 , H04N19/176
摘要： A computing device performs a method of decoding video data by determining a co-located picture of the current coding unit; locating a spatial neighbor block of the current coding unit that corresponds to the co-located picture; determining a motion shift vector for the current coding unit from one or more motion vectors associated with the spatial neighbor block according to a predefined fixed order; and reconstructing a sub-block-based temporal motion vector for a respective sub-block of a plurality of sub-blocks in the current coding unit from a corresponding sub-block in the collocated picture based on the motion shift vector.
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公开(公告)号：US12108030B2
公开(公告)日：2024-10-01
申请号：US17396648
申请日：2021-08-06
发明人： Yi-Wen Chen , Xiaoyu Xiu , Xianglin Wang , Tsung-Chuan Ma
IPC分类号： H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/513
CPC分类号： H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/513
摘要： Methods of selectively applying Bi-directional Optical Flow (BDOF) and Decoder-side Motion Vector Refinement (DMVR) on inter mode coded blocks employed in video coding standards, such as the now-current Versatile Video Coding (VVC) design, are performed at a computing device. In one method, when a current block is eligible for both applications of DMVR and BDOF based on a plurality of pre-defined conditions, the computing device uses a pre-defined criterion to classify the current block and then uses the classification in applying either BDOF or DMVR, but not both, on the block.
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