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公开(公告)号：US20230129504A1
公开(公告)日：2023-04-27
申请号：US18076200
申请日：2022-12-06
发明人： Semih Esenlik , Max Blaeser , Zhijie Zhao , Han Gao , Anand Meher Kotra , Biao Wang , Elena Alexandrovna Alshina
IPC分类号： H04N19/119 , H04N19/105 , H04N19/184 , H04N19/176
摘要： A method of coding implemented by a decoding device, comprising obtaining a bitstream; obtaining a value of an indicator for a current block according to the bitstream; obtaining a value of a first parameter for the current block and a value of a second parameter for the current block, according to the value of the indicator and a predefined lookup table; obtaining a value of a sample distance for a sample which is located in the current block, according to the value of the first parameter and the value of the second parameter; obtaining a prediction value for the sample, according to the value of the sample distance for the sample.
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公开(公告)号：US20230050102A1
公开(公告)日：2023-02-16
申请号：US17976666
申请日：2022-10-28
IPC分类号： H04N19/137 , H04N19/167 , H04N19/132
摘要： The present disclosure relates to an apparatus and a method for providing a plurality of motion vectors related to an image coded in a bitstream, comprising obtaining a set of sample positions within the image, obtaining respective motion vectors associated with the set of sample positions, deriving an additional motion vector based on information coded in the bitstream, determining an additional sample position located within a triangle, which is formed by three sample positions of the set of sample positions, based on the respective motion vectors associated with the three sample positions, the triangle not including any other sample position of the set, adding the additional sample position to the set of sample positions, and associating the derived additional motion vector with the additional sample position. Such method and apparatus provide for an efficient motion flow compression and reconstruction enabling to recover some sample positions without signaling them in the bitstream.
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公开(公告)号：US11575908B2
公开(公告)日：2023-02-07
申请号：US17170028
申请日：2021-02-08
发明人： Biao Wang , Semih Esenlik , Anand Meher Kotra , Han Gao , Jianle Chen
IPC分类号： H04N19/159 , H04N19/105 , H04N19/176
摘要： A method to derive candidate intra prediction modes, comprising: recording an intra prediction mode of at least one previous coding unit, wherein the previous coding unit is not adjacent to a to-be-processed coding unit; adding at least one recorded intra prediction mode into a set of candidate intra prediction modes, when the number of the candidate intra prediction modes is less than a preset threshold.
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公开(公告)号：US11523111B2
公开(公告)日：2022-12-06
申请号：US17356047
申请日：2021-06-23
发明人： Anand Meher Kotra , Semih Esenlik , Jianle Chen , Han Gao , Biao Wang , Zhijie Zhao
IPC分类号： H04N19/117 , H04N19/176 , H04N19/186 , H04N19/82 , H04N19/96
摘要： A method of filtering a sample value of a picture is provided, with an integer t that is less than k and with an integer j in the range of 1 to m: generating, with an integer i in the range of 1 to k−t−1, a filtered sample value by applying a filter to the value of the sample p(i,j), wherein the filter is supported by a set of filter support samples, the set of filter support samples does not comprise any samples p(i′,j′) with row index i′ greater than k−t−1, and/or generating, with an integer i in the range of k−t to k, a filtered sample value by applying a filter to the value of the sample p(i,j), the filter is supported by a set of filter support samples, wherein the set of filter support samples does not comprise any samples p(i′,j′) with row index i′ less than k−t.
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公开(公告)号：US20220329794A1
公开(公告)日：2022-10-13
申请号：US17847556
申请日：2022-06-23
IPC分类号： H04N19/117 , H04N19/70 , H04N19/186 , H04N19/174
摘要： A method in an image encoding and/or an image decoding, in which picture header entries for a cross-component adaptive loop filter (CC-ALF) are introduced which defines the common CC-ALF data and all the slices inherit this common information. The signaling overhead, in particular, the overhead of the slice header (in terms of number of bits) is reduced.
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公开(公告)号：US11445188B2
公开(公告)日：2022-09-13
申请号：US17204136
申请日：2021-03-17
发明人： Han Gao , Semih Esenlik , Jianle Chen , Anand Meher Kotra , Biao Wang , Zhijie Zhao
IPC分类号： H04N19/119 , H04N19/176 , H04N19/169 , H04N19/96
摘要： A method of image partitioning, comprises determining a first indicator, wherein the first indicator is shared by a first part of a bitstream; determining a partitioning of an image area corresponding to the first part of the bitstream with binary tree (BT) splitting or ternary tree (TT) splitting when the first indicator takes a first value; and determining the partitioning of the image area corresponding to the first part of the bitstream without BT splitting and TT splitting when the first indicator takes a second value, wherein the first value is different from the second value.
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公开(公告)号：US11405632B2
公开(公告)日：2022-08-02
申请号：US16843662
申请日：2020-04-08
发明人： Semih Esenlik , Anand Meher Kotra , Zhijie Zhao , Han Gao
IPC分类号： H04N19/51 , H04N19/513 , H04N19/57
摘要： The present disclosure relates to motion vector refinement. As a first step, an initial motion vector and a template for the block are obtained. Then, the refinement of the initial motion vector is determined by template matching with said template in a search space. The search space is located on a position given by the initial motion vector and includes one or more fractional sample positions, wherein each of the fractional sample positions belonging to the search space is obtained by interpolation filtering with a filter of a predefined tap-size assessing integer samples only within a window, said window being formed by integer samples accessible for the template matching in said search space.
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公开(公告)号：US11388422B2
公开(公告)日：2022-07-12
申请号：US17478534
申请日：2021-09-17
IPC分类号： H04N19/159 , H04N19/196 , H04N19/176 , H04N19/105
摘要： A method of coding implemented by a decoding device or an encoding device, comprising obtaining indication information for a luma position (cbWidth/2, cbHeight/2) of a current coding block, relative to a top-left luma sample postion (xCb, yCb) of the current coding block; setting a value of a luma intra prediction mode associated with the current coding block to a first default value, when the indication information indicates that a Matrix-based Intra Prediction (MIP) is applied for the luma component at the luma position (cbWidth/2, cbHeight/2), relative to the top-left luma sample postion (xCb, yCb) of the current coding block; and obtaining a value of a chroma intra prediction mode based on the value of the luma intra prediction mode of the current coding block.
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公开(公告)号：US20220217353A1
公开(公告)日：2022-07-07
申请号：US17586116
申请日：2022-01-27
发明人： Anand Meher Kotra , Semih Esenlik , Zhijie Zhao , Han Gao
IPC分类号： H04N19/132 , H04N19/117 , H04N19/176 , H04N19/82
摘要： A deblocking filter of an image processing device is provided. The deblocking filter is used in an image coding process, for deblocking a block edge between a first coding block and a second coding block of an image. The first block has SA samples perpendicular to the block edge by N samples parallel to the block edge, and the second block has SB samples perpendicular to the block edge by N samples parallel to the block edge. No more than IA samples of the first coding block are used as first filter input values, and no more than IB samples of the second coding block are used as second filter input values. No more than MA samples of the first coding block are modified as first filter output values, and no more than MB samples of the second coding block are modified as second filter output values.
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公开(公告)号：US11297345B2
公开(公告)日：2022-04-05
申请号：US17000765
申请日：2020-08-24
发明人： Biao Wang , Anand Meher Kotra , Semih Esenlik , Jianle Chen , Zhijie Zhao , Han Gao
IPC分类号： H04N19/593 , H04N19/176 , H04N19/44
摘要： A method for constructing a Most Probable Mode (MPM) list for intra prediction, the method comprising: determining whether a left neighboring block of a current coding block is available or not; determining whether an above neighboring block of the current coding block is available or not; using a Planar mode, a DC mode, a vertical mode (VER_IDX), a horizontal mode (HOR_IDX), an intra prediction mode corresponding to the vertical mode with an offset −4, an intra prediction mode corresponding to the vertical mode with an offset 4, to obtain a value of an intra prediction mode for the current coding block when one of conditions is satisfied. The MPM list is used to obtain an index value corresponding to a prediction mode of a picture block, so as to improve coding efficiency.
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