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公开(公告)号：US11736695B2
公开(公告)日：2023-08-22
申请号：US17686585
申请日：2022-03-04
发明人： Anand Meher Kotra , Elena Alexandrovna Alshina , Semih Esenlik , Biao Wang , Han Gao , Roman Igorevich Chernyak
IPC分类号： H04N19/124 , H04N19/117 , H04N19/176 , H04N19/186
CPC分类号： H04N19/124 , H04N19/117 , H04N19/176 , H04N19/186
摘要： A method for deblocking a chroma block edge between a first chroma block of a first image block and a second chroma block of a second image block. The method includes a decision process which includes: determining a first chroma quantization parameter for the first chroma block based on a first luma quantization parameter of a first luma block of the first image block and a chroma QP mapping table for the first chroma block; determining a second chroma quantization parameter for the second chroma block based on a second luma quantization parameter of a second luma block of the second image block and a chroma QP mapping table for the second chroma block; determining an averaged and rounded chroma quantization parameter based on the first chroma quantization parameter and the second chroma quantization parameter; and determining a threshold parameter based on the averaged and rounded chroma quantization parameter.
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公开(公告)号：US11716479B2
公开(公告)日：2023-08-01
申请号：US17830875
申请日：2022-06-02
IPC分类号： H04N11/02 , H04N19/186 , H04N19/176 , H04N19/44 , H04N19/60 , H04N19/70
CPC分类号： H04N19/186 , H04N19/176 , H04N19/44 , H04N19/60 , H04N19/70
摘要： A method comprising obtaining a bitstream, the bitstream comprises a transform unit syntax and a coding unit syntax, the transform unit syntax includes a value of a first flag and a value of a second flag related to, respectively, a first chroma transform block and a second chroma transform block of a current transform unit or a current sub-transform unit within the current transform unit, the first or second flag specifies whether the first or second chroma transform block contains at least one transform coefficient levels not equal to 0, the coding unit syntax includes a value of a third flag specifying whether a transform tree structure is present or not; and deriving a value of a fourth flag based on the values of the first, second, and third flags, the fourth flag specifies whether a luma transform block contains at least one transform coefficient levels not equal to 0.
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公开(公告)号：US11689723B2
公开(公告)日：2023-06-27
申请号：US17249946
申请日：2021-03-19
发明人： Roman Igorevich Chernyak , Alexander Alexandrovich Karabutov , Sergey Yurievich Ikonin , Timofey Mikhailovich Solovyev , Haitao Yang , Jianle Chen , Yin Zhao
IPC分类号： H04N19/124 , H04N19/105 , H04N19/132 , H04N19/176 , H04N19/186 , H04N19/46
CPC分类号： H04N19/124 , H04N19/105 , H04N19/132 , H04N19/176 , H04N19/186 , H04N19/46
摘要： A method for inverse quantization of a current block of a picture is provided. The method is performed by a decoder, and the picture comprises a luminance component and a chrominance component, where the luminance component and the chrominance component are partitioned into multiple blocks. The method includes obtaining one or more existing quantization parameter (QP) values from a received bitstream, wherein the one or more existing QP values are associated with a current block in the chrominance component; determining a QP value for the current block in the chrominance component based on the one or more existing QP values; performing inverse quantization on the current block in the chrominance component using the determined QP value.
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4.发明公开公开(公告)号：US20230199227A1
公开(公告)日：2023-06-22
申请号：US18172174
申请日：2023-02-21
发明人： Roman Igorevich Chernyak , Kamilla Railevna DAVLETSHINA , Sergey Yurievich Ikonin , Elena Alexandrovna Alshina
IPC分类号： H04N19/80 , H04N19/60 , H04N19/182 , H04N19/176
CPC分类号： H04N19/80 , H04N19/60 , H04N19/182 , H04N19/176
摘要： A method of coding is implemented by a decoding device, the method includes: receiving a bitstream, and obtaining from the bitstream, a first luma bit depth value of luma samples of a current picture. The method also includes performing a Hadamard Transform Domain Filtering (HTDF) post reconstruction filtering of a block of the current picture by using a lookup table based on the obtained first luma bit depth value.
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5.发明申请公开(公告)号：US20220174326A1
公开(公告)日：2022-06-02
申请号：US17678253
申请日：2022-02-23
发明人： Timofey Mikhailovich Solovyev , Maxim Borisovitch Sychev , Huanbang Chen , Alexander Alexandrovich Karabutov , Roman Igorevich Chernyak , Sergey Yurievich Ikonin , Haitao Yang , Elena Alexandrovna Alshina
IPC分类号： H04N19/80 , H04N19/139 , H04N19/176 , H04N19/105 , H04N19/132 , H04N19/172 , H04N19/117 , H04N19/61 , H04N19/122 , H04N19/85
摘要： A method for coding a video implemented in an encoder or a decoder including the enhanced interpolation filter, EIF, for motion compensation, the method comprising: i) determining control point motion vectors, CPMVs, for a block according to affine inter-prediction, the block being an affine block or a sub-block of the affine block; ii) for a predefined sub-block size determining a reference area for a sub-block with the predefined sub-block size according to values of the CPMVs; iii) comparing the determined reference area with a predefined threshold; iv) applying EIF for motion compensation, comprising deriving the pixel-based motion vector field for the block; wherein if the determined reference area is larger than the threshold, deriving the pixel-based motion vector field for the block further comprises motion vector clipping, wherein motion vector clipping range is determined based on motion model of the block and the size of the block.
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公开(公告)号：US20240282014A1
公开(公告)日：2024-08-22
申请号：US18637212
申请日：2024-04-16
摘要： Methods and apparatuses are provided for entropy encoding and decoding data of a three-dimensional point cloud, which includes for a current node in an N-ary tree-structure representing the three-dimensional point cloud, extracting features of a set of the neighboring nodes of the current node by applying a neural network including an attention layer. Probabilities of information associated with the current node is estimated based on the extracted features. The information associated with the current node is entropy encoded based on the estimated probabilities.
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公开(公告)号：US12047609B2
公开(公告)日：2024-07-23
申请号：US17707202
申请日：2022-03-29
发明人： Timofey Mikhailovich Solovyev , Maxim Borisovitch Sychev , Huanbang Chen , Alexander Alexandrovich Karabutov , Roman Igorevich Chernyak , Sergey Yurievich Ikonin , Haitao Yang , Elena Alexandrovna Alshina
IPC分类号： H04N19/82 , H04N19/105 , H04N19/109 , H04N19/117 , H04N19/132 , H04N19/139 , H04N19/176 , H04N19/182 , H04N19/196 , H04N19/52 , H04N19/80
CPC分类号： H04N19/80 , H04N19/105 , H04N19/109 , H04N19/117 , H04N19/132 , H04N19/139 , H04N19/176 , H04N19/182 , H04N19/197 , H04N19/52
摘要： An apparatus for inter prediction of a sample value of a current full-integer pixel of a plurality of pixels associated with a current block of a current frame of a video signal is disclosed. The apparatus is configured to: determine a motion vector of the current full-integer pixel based on a motion compensation model; determine for the current full-integer pixel a corresponding sub-integer pixel in a reference frame; determine positions of a set of corresponding filter support pixels in the reference frame; obtain a respective sample value of the corresponding sub-integer pixel of the current full-integer pixel and the corresponding filter support pixels in the reference frame by applying a bilinear interpolation; and determine the inter predicted sample value of the current full-integer pixel.
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公开(公告)号：US11997296B2
公开(公告)日：2024-05-28
申请号：US17571175
申请日：2022-01-07
发明人： Timofey Mikhailovich Solovyev , Roman Igorevich Chernyak , Alexander Alexandrovich Karabutov , Sergey Yurievich Ikonin
IPC分类号： H04N19/176 , H04N19/433 , H04N19/52 , H04N19/96
CPC分类号： H04N19/433 , H04N19/52 , H04N19/96
摘要： A method for deriving motion information for a current block includes: determining whether the current block and a top neighboring block of the current block are in a same coding tree unit (CTU) or not; obtaining a position of a spatial motion information candidate for the current block; obtaining motion information corresponding to the position of the spatial motion information candidate, depending on the result of whether the current block and top neighboring block of the current block are in the same CTU; adding the obtained motion information to a motion information candidate list for the current block; obtaining a value of a first index of a motion information candidate; and deriving motion information of the current block based on the motion information candidate list and the value of the first index.
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公开(公告)号：US11863748B2
公开(公告)日：2024-01-02
申请号：US17547169
申请日：2021-12-09
发明人： Sergey Yurievich Ikonin , Roman Igorevich Chernyak , Timofey Mikhailovich Solovyev , Alexander Alexandrovich Karabutov , Elena Alexandrovna Alshina
IPC分类号： H04N19/124 , H04N19/186 , H04N19/196
CPC分类号： H04N19/124 , H04N19/186 , H04N19/196
摘要： A method of obtaining quantization parameter (QP) for chrominance components based on QP for luminance component, wherein the method is performed by a decoder or encoder, and wherein the method comprises obtaining a luminance QP for a luma component of a coding unit; obtaining a QP index (QPi) based at least in a part on the luminance QP; and obtaining a chrominance QP (QPc) for a chroma component of the coding unit based on the QP index by using a preset lookup table, wherein the maximum difference between the QP index and the chrominance QP is equal to 3.
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公开(公告)号：US20220103822A1
公开(公告)日：2022-03-31
申请号：US17547169
申请日：2021-12-09
发明人： Sergey Yurievich Ikonin , Roman Igorevich Chernyak , Timofey Mikhailovich Solovyev , Alexander Alexandrovich Karabutov , Elena Alexandrovna Alshina
IPC分类号： H04N19/124 , H04N19/186 , H04N19/196
摘要： A method of obtaining quantization parameter (QP) for chrominance components based on QP for luminance component, wherein the method is performed by a decoder or encoder, and wherein the method comprises obtaining a luminance QP for a luma component of a coding unit; obtaining a QP index (QPi) based at least in a part on the luminance QP; and obtaining a chrominance QP (QPc) for a chroma component of the coding unit based on the QP index by using a preset lookup table, wherein the maximum difference between the QP index and the chrominance QP is equal to 3.
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