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公开(公告)号：US20240364933A1
公开(公告)日：2024-10-31
申请号：US18763702
申请日：2024-07-03
申请人： TENCENT AMERICA LLC
发明人： Byeongdoo Choi , Shan Liu , Stephan Wenger
IPC分类号： H04N19/70 , H04N19/103 , H04N19/136 , H04N19/172 , H04N19/184 , H04N19/51 , H04N19/593
CPC分类号： H04N19/70 , H04N19/103 , H04N19/136 , H04N19/172 , H04N19/184 , H04N19/51 , H04N19/593
摘要： Systems and methods for coding and decoding are provided. A method includes encoding a video stream including video data partitioned into a plurality of layers, wherein the encoding includes determining whether a first picture of the video stream is to be output based on a syntax element that indicates a mode of output layer set signaling.
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公开(公告)号：US20240364930A1
公开(公告)日：2024-10-31
申请号：US18763311
申请日：2024-07-03
发明人： Xiaoyu XIU , Yi-Wen CHEN , Tsung-Chuan MA , Hong-Jheng JHU , Xianglin WANG , Bing YU
IPC分类号： H04N19/70 , H04N19/12 , H04N19/132 , H04N19/136 , H04N19/174 , H04N19/186 , H04N19/30 , H04N19/60
CPC分类号： H04N19/70 , H04N19/12 , H04N19/132 , H04N19/136 , H04N19/174 , H04N19/186 , H04N19/30 , H04N19/60
摘要： An electronic apparatus performs a method of decoding video data, comprising: receiving, from bitstream, a first syntax element in a slice header of a slice that indicates whether luma mapping with chroma scaling (LMCS) is applied to a coding unit in the slice; receiving a second syntax element for the coding unit that indicates whether the coding unit has been coded using adaptive color-space transform (ACT); if the second syntax element has a non-zero value, decoding the coding unit by applying inverse ACT to convert luma and chroma residuals of the coding unit from a transformed color space to an original color space of the video data; and if the first syntax element has a non-zero value, decoding the coding unit by performing inverse luma mapping to the luma samples and inverse scaling to the chroma residuals of the coding unit after performing the inverse ACT.
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公开(公告)号：US20240364909A1
公开(公告)日：2024-10-31
申请号：US18769103
申请日：2024-07-10
发明人： Ye-Kui Wang
IPC分类号： H04N19/44 , H04N19/149 , H04N19/154 , H04N19/169 , H04N19/172 , H04N19/187 , H04N19/30 , H04N19/423 , H04N19/46 , H04N19/70
CPC分类号： H04N19/44 , H04N19/149 , H04N19/154 , H04N19/172 , H04N19/187 , H04N19/188 , H04N19/30 , H04N19/423 , H04N19/46 , H04N19/70
摘要： A video coding mechanism is disclosed. The mechanism includes encoding a bitstream comprising one or more output layer sets (OLSs). A video parameter set (VPS) specifying the OLS is also encoded into the bitstream. The VPS comprises sequence-level hypothetical reference decoder (HRD) parameters that apply to all OLSs specified by the VPS.
A set of bitstream conformance tests are performed based on the sequence-level HRD parameters. The bitstream is stored for communication toward a decoder.-
公开(公告)号：US20240364902A1
公开(公告)日：2024-10-31
申请号：US18767785
申请日：2024-07-09
IPC分类号： H04N19/174 , H04N19/124 , H04N19/46 , H04N19/70 , H04N19/96
CPC分类号： H04N19/174 , H04N19/124 , H04N19/46 , H04N19/70 , H04N19/96
摘要： A method of decoding a plurality of coding units from a bitstream to produce an image frame, the coding units being the result of decompositions of coding tree units, the plurality of coding units forming one or more contiguous portions of the bitstream. The method comprises determining a subdivision level for each portion of the bitstream, each subdivision level being applicable to the coding units of the respective contiguous portion of the bitstream; decoding a quantisation parameter delta for each of a number of areas, each area based on decomposition of coding tree units into coding units of each contiguous portion of the bitstream and the corresponding determined subdivision level; determining a quantisation parameter for each area according to the decoded delta quantisation parameter for the area and the quantisation parameter of an earlier coding unit of the image frame; decoding using the determined quantisation parameter of each area.
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公开(公告)号：US20240364901A1
公开(公告)日：2024-10-31
申请号：US18767755
申请日：2024-07-09
IPC分类号： H04N19/174 , H04N19/124 , H04N19/46 , H04N19/70 , H04N19/96
CPC分类号： H04N19/174 , H04N19/124 , H04N19/46 , H04N19/70 , H04N19/96
摘要： A method of decoding a plurality of coding units from a bitstream to produce an image frame, the coding units being the result of decompositions of coding tree units, the plurality of coding units forming one or more contiguous portions of the bitstream. The method comprises determining a subdivision level for each portion of the bitstream, each subdivision level being applicable to the coding units of the respective contiguous portion of the bitstream; decoding a quantisation parameter delta for each of a number of areas, each area based on decomposition of coding tree units into coding units of each contiguous portion of the bitstream and the corresponding determined subdivision level; determining a quantisation parameter for each area according to the decoded delta quantisation parameter for the area and the quantisation parameter of an earlier coding unit of the image frame; decoding using the determined quantisation parameter of each area.
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公开(公告)号：US20240364900A1
公开(公告)日：2024-10-31
申请号：US18767679
申请日：2024-07-09
IPC分类号： H04N19/174 , H04N19/124 , H04N19/46 , H04N19/70 , H04N19/96
CPC分类号： H04N19/174 , H04N19/124 , H04N19/46 , H04N19/70 , H04N19/96
摘要： A method of decoding a plurality of coding units from a bitstream to produce an image frame, the coding units being the result of decompositions of coding tree units, the plurality of coding units forming one or more contiguous portions of the bitstream. The method comprises determining a subdivision level for each portion of the bitstream, each subdivision level being applicable to the coding units of the respective contiguous portion of the bitstream; decoding a quantisation parameter delta for each of a number of areas, each area based on decomposition of coding tree units into coding units of each contiguous portion of the bitstream and the corresponding determined subdivision level; determining a quantisation parameter for each area according to the decoded delta quantisation parameter for the area and the quantisation parameter of an earlier coding unit of the image frame; decoding using the determined quantisation parameter of each area.
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公开(公告)号：US20240364884A1
公开(公告)日：2024-10-31
申请号：US18769189
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：US20240364854A1
公开(公告)日：2024-10-31
申请号：US18771216
申请日：2024-07-12
发明人： Ki Baek KIM
IPC分类号： H04N13/161 , G06T3/40 , H04N19/103 , H04N19/105 , H04N19/11 , H04N19/119 , H04N19/124 , H04N19/129 , H04N19/13 , H04N19/134 , H04N19/159 , H04N19/167 , H04N19/172 , H04N19/176 , H04N19/597 , H04N19/625 , H04N19/70 , H04N23/698
CPC分类号： H04N13/161 , G06T3/40 , H04N19/103 , H04N19/105 , H04N19/11 , H04N19/119 , H04N19/124 , H04N19/129 , H04N19/13 , H04N19/134 , H04N19/159 , H04N19/167 , H04N19/172 , H04N19/176 , H04N19/597 , H04N19/625 , H04N19/70 , H04N23/698
摘要： Disclosed are methods and apparatuses for decoding an image. A method includes receiving a bitstream obtained by encoding the image; dividing a first coding block into a plurality of second coding blocks; generating a prediction block of a second coding block based on syntax information obtained from the bitstream; and reconstructing the second coding block based on the prediction block and a residual block of the second coding block, the residual block being obtained by performing a dequantization and an inverse-transform on quantized transform coefficients from the bitstream. The first coding block has a recursive division structure. The first coding block is divided based on at least one of a quad tree division, a binary tree division or a triple tree division.
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公开(公告)号：US12133019B2
公开(公告)日：2024-10-29
申请号：US17477060
申请日：2021-09-16
申请人： Lemon Inc.
发明人： Ye-Kui Wang
IPC分类号： H04N7/01 , H04N19/105 , H04N19/132 , H04N19/136 , H04N19/157 , H04N19/172 , H04N19/177 , H04N19/184 , H04N19/70
CPC分类号： H04N7/01 , H04N19/105 , H04N19/132 , H04N19/136 , H04N19/157 , H04N19/172 , H04N19/177 , H04N19/184 , H04N19/70
摘要： Systems, methods and apparatus for processing visual media data are described. One example method includes performing a conversion between visual media data and a visual media file that includes one or more tracks that store one or more bitstreams of the visual media data according to a format rule; wherein the visual media file includes a base track that references one or more subpicture tracks that store coded information for one or more subpictures of the visual media data, and wherein the format rule specifies a process used to reconstruct a video unit from a sample in the base track and the one or more subpicture tracks.
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公开(公告)号：US12132920B2
公开(公告)日：2024-10-29
申请号：US18143950
申请日：2023-05-05
申请人： LG ELECTRONICS INC.
发明人： Moonmo Koo , Mehdi Salehifar , Seunghwan Kim , Jaehyun Lim
IPC分类号： H04N19/44 , H04N19/159 , H04N19/176 , H04N19/625 , H04N19/70
CPC分类号： H04N19/44 , H04N19/159 , H04N19/176 , H04N19/625 , H04N19/70
摘要： A method and a device for processing a video signal are disclosed. In particular, a method for decoding a video signal includes parsing a first syntax element indicating a primary transform kernel applied to a primary transform of a current block; determining whether a secondary transform is applicable to the current block based on the first syntax element; if the secondary transform is applicable to the current block, parsing a second syntax element indicating a secondary transform kernel applied to a secondary transform of the current block; deriving a secondary inverse-transformed block, by performing a secondary inverse-transform for a top-left specific region of the current block using a secondary transform kernel indicated by the second syntax element; and deriving a residual block of the current block, by performing a primary inverse-transform for the secondary inverse-transformed block using a primary transform kernel indicated by the first syntax element.
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