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公开(公告)号：US20240292033A1
公开(公告)日：2024-08-29
申请号：US18650739
申请日：2024-04-30
发明人： Xiaoyu Xiu , Tsung-Chuan Ma , Yi-Wen Chen , Xianglin Wang , Hong-Jheng Jhu , Bing Yu
IPC分类号： H04N19/625 , H04N19/129 , H04N19/176 , H04N19/46
CPC分类号： H04N19/625 , H04N19/129 , H04N19/176 , H04N19/46
摘要： A method for video encoding includes determining whether any coding group of a transform block located within a zero-out region has a non-zero coefficient. The transform block comprises a non-zero region and the zero-out region. Further, in accordance with a determination that no coding group of the transform block located within the zero-out region has a non-zero coefficient, the method includes applying respective inverse transforms to transform coefficients of the transform block in both horizontal and vertical directions.
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公开(公告)号：US12047567B2
公开(公告)日：2024-07-23
申请号：US17573332
申请日：2022-01-11
发明人： Yi-Wen Chen , Xianglin Wang , Xiaoyu Xiu , Hong-Jheng Jhu , Bing Yu
IPC分类号： H04N19/117 , H04N19/154 , H04N19/176 , H04N19/186 , H04N19/82
CPC分类号： H04N19/117 , H04N19/154 , H04N19/176 , H04N19/186 , H04N19/82
摘要： Systems and methods for applying an adaptive loop filter (ALP) in video coding are provided. The method may include determining a first rate-distortion cost of applying the adaptive loop filter on a reconstructed block. The reconstructed block includes a reconstructed version of an image block of an image frame from a video. The method may further include determining a second rate-distortion cost of not applying the adaptive loop filter on the reconstructed block. The method may additionally include determining whether to apply the adaptive loop filter for processing the reconstructed block based on the first rate-distortion cost and the second rate-distortion cost.
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公开(公告)号：US12034913B2
公开(公告)日：2024-07-09
申请号：US17522785
申请日：2021-11-09
发明人： Xianglin Wang , Yi-Wen Chen , Xiaoyu Xiu , Tsung-Chuan Ma , Hong-Jheng Jhu , Shuiming Ye
IPC分类号： H04N19/105 , H04N19/119 , H04N19/13 , H04N19/139 , H04N19/46 , H04N19/52 , H04N19/573
CPC分类号： H04N19/105 , H04N19/119 , H04N19/13 , H04N19/139 , H04N19/46 , H04N19/52 , H04N19/573
摘要： Methods and apparatuses are provided for video coding. The method includes: partitioning video pictures into a plurality of coding units (CUs), at least one of which is further partitioned into two prediction units (PUs) including at least one geometric shaped PU; obtaining a first merge list including a plurality of candidates, each including one or more motion vectors; and obtaining a uni-prediction merge list for the geometric shaped PU by selecting the one or more motion vectors directly from the first merge list.
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公开(公告)号：US11924411B2
公开(公告)日：2024-03-05
申请号：US17844712
申请日：2022-06-20
发明人： Yi-Wen Chen , Xianglin Wang , Xiaoyu Xiu
IPC分类号： H04N19/00 , H04N19/105 , H04N19/132 , H04N19/176 , H04N19/186
CPC分类号： H04N19/105 , H04N19/132 , H04N19/176 , H04N19/186
摘要： A method and a computing device are provided for video coding. The method may include deriving parameter α and parameter β for a CCLM mode by using a predetermined number of neighboring reconstructed luma samples and chroma samples in a CU; and generating a final chroma predictor for the chroma samples of the CU by using the parameter α and the parameter β.
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公开(公告)号：US20240040133A1
公开(公告)日：2024-02-01
申请号：US18485908
申请日：2023-10-12
发明人： Hong-Jheng Jhu , Xiaoyu Xiu , Yi-Wen Chen , Wei Chen , Che-wei Kuo , Xianglin Wang , Bing Yu
IPC分类号： H04N19/186 , H04N19/184 , H04N19/176 , H04N19/132 , H04N19/593 , H04N19/11 , H04N19/70 , H04N19/136
CPC分类号： H04N19/186 , H04N19/184 , H04N19/176 , H04N19/132 , H04N19/593 , H04N19/11 , H04N19/70 , H04N19/136
摘要： A computing device performs a method of decoding video data by generating a multi-model linear model (MMLM) including a first linear model between the minimum luma value and the threshold luma value, and a second linear model between the threshold luma value and the maximum luma value from a group of reference luma samples and a group of reference chroma samples; and reconstructing a respective sample value of the chroma block from a weighted combination of a respective first corresponding reconstructed sample value of the luma block using the multi-model linear model, and a respective second reconstructed sample value of a neighboring chroma block from an intra prediction mode.
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公开(公告)号：US20230199209A1
公开(公告)日：2023-06-22
申请号：US18173335
申请日：2023-02-23
发明人： Che-Wei Kuo , Xiaoyu Xiu , Wei Chen , Xianglin Wang , Yi-Wen Chen , Tsung-Chuan Ma , Hong-Jheng Jhu , Bing Yu
IPC分类号： H04N19/44 , H04N19/132 , H04N19/117 , H04N19/82 , H04N19/186
CPC分类号： H04N19/44 , H04N19/132 , H04N19/117 , H04N19/82 , H04N19/186
摘要： An electronic apparatus performs a method of decoding video data. The method includes receiving, from the video signal, a picture frame that includes a first component and a second component, receiving, from the video signal, a plurality of sample offsets associated with the second component, reconstructing the samples of the first component before a first in-loop filter module, reconstructing the samples of the second component after a second in-loop filter module, determining a classifier for the second component from one or more reconstructed samples of the first component relative to each sample of the second component, selecting a sample offset from the plurality of sample offsets for the second component according to the classifier, and modifying the reconstructed samples of the second component based on the selected sample offset.
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公开(公告)号：US20220150522A1
公开(公告)日：2022-05-12
申请号：US17583092
申请日：2022-01-24
发明人： Yi-Wen CHEN , Xiaoyu Xiu , Tsung-Chuan Ma , Hong-Jheng Jhu , Xianglin Wang , Bing Yu
IPC分类号： H04N19/44 , H04N19/91 , H04N19/176 , H04N19/70
摘要： An electronic apparatus performs a method of decoding video data. The method comprises: receiving, from bitstream, video data corresponding to a transform-skip mode coded block; decoding, from the video data, a first codeword, a second codeword and a first group of codewords for a pixel within the transform-skip mode coded block; deriving an initial level value from the first group of codewords; converting the first codeword into a remainder of the pixel in accordance with a predefined mapping relationship that is generated using a constant Rice parameter; converting the second codeword into a sign value of the remainder; and deriving a quantified residual of the pixel from the remainder, the sign value and the initial level value.
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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：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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