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公开(公告)号：US11818357B2
公开(公告)日：2023-11-14
申请号：US17358572
申请日：2021-06-25
发明人： Maxim Borisovitch Sychev , Timofey Mikhailovich Solovyev , Alexander Alexandrovich Karabutov , Sergey Yurievich Ikonin , Jianle Chen
IPC分类号： H04N19/137 , H04N19/159 , H04N19/176 , H04N19/46 , H04N19/503
CPC分类号： H04N19/137 , H04N19/159 , H04N19/176 , H04N19/46 , H04N19/503
摘要： The disclosure provides a motion vector compression method, comprising: obtaining a temporal motion vector; determining a compressed motion vector using a binary representation of the temporal motion vector comprising an exponent part and/or a mantissa part, wherein the exponent part comprises N bits, the mantissa part comprises M bits, and wherein N is a non-negative integer and M is a positive integer; and performing a temporal motion vector prediction (TMVP) using the compressed motion vector.
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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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23.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：US11202082B2
公开(公告)日：2021-12-14
申请号：US17035692
申请日：2020-09-29
发明人： Maxim Borisovitch Sychev , Georgy Aleksandrovich Zhulikov , Timofey Mikhailovich Solovyev , Sergey Yurievich Ikonin
IPC分类号： H04N19/182 , H04N19/117 , H04N19/172 , H04N19/513
摘要： The disclosure relates to an image processing apparatus. The image processing apparatus comprises processing circuitry configured to: obtain a direction angle value associated with the target pixel (12a-c); select for the target pixel (12a-c) a plurality of primary interpolation support pixels (10a-d) from the array of pixels (10a-d) on the basis of the position of the target pixel (12a-c); determine pixel values of a first and a second secondary interpolation support pixels (11ac, 11bd) on the basis of the pixel values of the selected primary interpolation support pixels (10a-d), the direction angle value (a, b) and the position of the target pixel (12a-c); and determine the interpolated pixel value of the target pixel (12a-c) on the basis of the pixel values of the first and second secondary interpolation support pixel (11ac, 11bd) and the position of the target pixel (12a-c).
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公开(公告)号：US20210352276A1
公开(公告)日：2021-11-11
申请号：US17376463
申请日：2021-07-15
发明人： Maxim Borisovitch Sychev , Timofey Mikhailovich Solovyev , Alexander Alexandrovich Karabutov , Sergey Yurievich Ikonin , Jianle Chen
IPC分类号： H04N19/105 , H04N19/132 , H04N19/137 , H04N19/159 , H04N19/176
摘要： An apparatus and method for inter prediction of a block includes estimating local illumination compensation (LIC) parameters using first reference samples of a current block and second reference samples of a reference block, wherein a third reference sample of the second reference samples is based on an integer part of a fractional motion vector (MV), and obtaining inter prediction of the current block according to the LIC parameters.
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公开(公告)号：US20210127128A1
公开(公告)日：2021-04-29
申请号：US17138250
申请日：2020-12-30
IPC分类号： H04N19/52 , H04N19/169
摘要： Motion vectors (MVs) are used as predictors for prediction of an image for a current coding unit (CU) within a current video frame. The MVs are from a list of motion vector candidates (MVCs), which is generated. The list includes MVs determined from a first or second pattern, each pattern specifying MVC positions. The first MV positions are within a current video frame, while the second MV positions are for a video frame different from the current frame. The MVC list is generated for a current CU with the MV positions being relative to a position of the current CU. In particular, the MVC list is generated in dependence on a size of the current CU and a size of a grid specifying a minimum distance between two MV positions. One or more MVs as specified by the MV positions of said pattern are included into the MVC list.
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公开(公告)号：US20210014511A1
公开(公告)日：2021-01-14
申请号：US17035692
申请日：2020-09-29
发明人： Maxim Borisovitch Sychev , Georgy Aleksandrovich Zhulikov , Timofey Mikhailovich Solovyev , Sergey Yurievich Ikonin
IPC分类号： H04N19/182 , H04N19/513 , H04N19/172 , H04N19/117
摘要： The disclosure relates to an image processing apparatus. The image processing apparatus comprises processing circuitry configured to: obtain a direction angle value associated with the target pixel (12a-c); select for the target pixel (12a-c) a plurality of primary interpolation support pixels (10a-d) from the array of pixels (10a-d) on the basis of the position of the target pixel (12a-c); determine pixel values of a first and a second secondary interpolation support pixels (11ac, 11bd) on the basis of the pixel values of the selected primary interpolation support pixels (10a-d), the direction angle value (a, b) and the position of the target pixel (12a-c); and determine the interpolated pixel value of the target pixel (12a-c) on the basis of the pixel values of the first and second secondary interpolation support pixel (11ac, 11bd) and the position of the target pixel (12a-c).
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公开(公告)号：US12069242B2
公开(公告)日：2024-08-20
申请号：US17870271
申请日：2022-07-21
发明人： Roman Igorevich Chernyak , Timofey Mikhailovich Solovyev , Sergey Yurievich Ikonin , Alexander Alexandrovich Karabutov , Elena Alexandrovna Alshina
IPC分类号： H04N19/105 , H04N19/159 , H04N19/172 , H04N19/70
CPC分类号： H04N19/105 , H04N19/159 , H04N19/172 , H04N19/70
摘要： Reference picture management scheme is provided in the context of video coding. A method of decoding an encoded video sequence, comprising obtaining a value of a reference picture list (RPL) syntax element from a bitstream of the encoded video sequence, the RPL syntax element specifying whether syntax elements related to reference picture lists are present in the bitstream, when the RPL syntax element specifies that the syntax elements related to the reference picture lists are present in the bitstream, obtaining, from the bitstream, values of the syntax elements related to the reference picture lists; and constructing at least one reference picture list for inter prediction using the obtained values of the syntax elements related to the reference picture lists.
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公开(公告)号：US12058337B2
公开(公告)日：2024-08-06
申请号：US17708866
申请日：2022-03-30
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： H04N19/105 , H04N19/132 , H04N19/137 , H04N19/176 , H04N19/30 , H04N19/46
CPC分类号： H04N19/137 , H04N19/105 , H04N19/132 , H04N19/176 , H04N19/30 , H04N19/46
摘要： A method of coding implemented by a decoding/encoding device for coding video data includes for a block coded in affine mode, determining control point motion vectors (CPMVs); determining a reference area in a reference picture corresponding to a sub-block of the affine coded block based on the CPMVs; setting a variable clipMVX equal to TRUE if a size of the reference area is greater than a predefined threshold, otherwise setting a variable clipMVX equal to FALSE; deriving a pixel-based motion vector field for the affine coded block; wherein, if the variable clipMVX is equal to TRUE, the deriving the pixel-based motion vector field further comprises motion vector clipping based on a first clipping range, wherein the first clipping range is determined based on the determined CPMVs and a size of the affine coded block.
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公开(公告)号：US12052419B2
公开(公告)日：2024-07-30
申请号：US17452137
申请日：2021-10-25
发明人： Sergey Yurievich Ikonin , Roman Igorevich Chernyak , Timofey Mikhailovich Solovyev , Alexander Alexandrovich Karabutov , Elena Alexandrovna Alshina , Jianle Chen
IPC分类号： H04N19/126 , H04N19/124 , H04N19/132 , H04N19/172 , H04N19/174 , H04N19/184 , H04N19/186 , H04N19/44
CPC分类号： H04N19/126 , H04N19/124 , H04N19/132 , H04N19/172 , H04N19/174 , H04N19/184 , H04N19/186 , H04N19/44
摘要： A method of obtaining a chrominance quantization parameter (QP) for chrominance components based on a luminance QP for a luminance component, wherein the method is performed by a decoder, and comprises parsing a received bitstream to obtain the luminance QP and information of a mapping function (ƒ) which associates a QP index (QPi) to a chrominance QP (QPc); obtaining the QPi based at least in part on the luminance QP; obtaining the mapping function based on the obtained information of the mapping function; and obtaining a QPc based on the obtained mapping function and the obtained QPi.
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