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公开(公告)号：US11228788B2
公开(公告)日：2022-01-18
申请号：US15931341
申请日：2020-05-13
IPC分类号： H04N19/00 , H04N19/82 , H04N19/117 , H04N19/124 , H04N19/147 , H04N19/176 , H04N19/182 , H04N19/51
摘要： The disclosure relates to an in-loop filter apparatus for video coding, which is configured for processing a reconstructed frame corresponding to a current frame for generation of a filtered reconstructed frame, wherein the reconstructed frame comprises a plurality of pixels, each pixel being associated with a pixel value. The in-loop filter apparatus comprises a processing unit configured to: partition the reconstructed frame into a plurality of overlapping and/or non-overlapping 2D pixel blocks; generate for each 2D pixel block a 2D spectrum by applying a 2D transform to the 2D pixel block, wherein the 2D spectrum comprises a plurality of spectral components; generate for each 2D pixel block a filtered 2D spectrum by multiplying each spectral component with a respective gain coefficient, wherein the respective gain coefficient depends on the respective spectral component and/or one or more neighboring spectral components of the respective spectral component and one or more filtering parameters; generate for each 2D pixel block a filtered 2D pixel block by applying an inverse 2D transform to the filtered 2D spectrum; and generate the filtered reconstructed frame on the basis of the plurality of filtered 2D pixel blocks.
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公开(公告)号：US11924407B2
公开(公告)日：2024-03-05
申请号：US17451139
申请日：2021-10-15
发明人： Timofey Mikhailovich Solovyev , Sergey Yurievich Ikonin , Roman Igorevich Chernyak , Alexander Alexandrovich Karabutov , Elena Alexandrovna Alshina , Huanbang Chen
IPC分类号： H04N19/105 , H04N19/132 , H04N19/137 , H04N19/159 , H04N19/176 , H04N19/82
CPC分类号： H04N19/105 , H04N19/132 , H04N19/137 , H04N19/159 , H04N19/176 , H04N19/82
摘要： The present disclosure relates to video encoding and decoding, and in particular, a method for inter prediction for a block in a frame of a video signal includes: constructing a history-based motion information candidate list, wherein the list is an ordered list comprising N history-based motion information candidates Hk containing motion information of N preceding blocks preceding the block, wherein each history-based motion information candidate comprises: one or more motion vectors (MVs), one or more reference picture indices corresponding to the MVs, and an interpolation filter index; adding one or more history-based motion information candidates from the history-based motion information candidate list into a motion information candidate list for the block; and deriving motion information for the block based on the motion information candidate list.
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公开(公告)号：US11765383B2
公开(公告)日：2023-09-19
申请号：US17237924
申请日：2021-04-22
发明人： Timofey Mikhailovich Solovyev , Roman Igorevich Chernyak , Alexander Alexandrovich Karabutov , Jianle Chen , Sergey Yurievich Ikonin , Elena Alexandrovna Alshina
IPC分类号： H04N19/573 , H04N19/159 , H04N19/176 , H04N19/577
CPC分类号： H04N19/573 , H04N19/159 , H04N19/176 , H04N19/577
摘要： The present disclosure relates to video encoding and decoding, and in particular to determining motion information for a current block using a history-based motion vector predictor, HMVP, list. The HMVP list is constructed, with said list being an ordered list of N HMVP candidates Hk, k=0, . . . , N−1, which are associated with motion information of N preceding blocks of the frame and precede the current block. Each HMVP candidate has motion information including elements of one or more motion vectors, MVs, one or more reference picture indices corresponding to the MVs, and one or more bi-prediction weight indices. One or more HMVP candidates from the HMVP list are added into a motion information candidate list for the current block; and the motion information is derived based on the motion information candidate list.
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公开(公告)号：US11706412B2
公开(公告)日：2023-07-18
申请号：US17139913
申请日：2020-12-31
发明人： Victor Alexeevich Stepin , Sergey Yurievich Ikonin , Roman Igorevich Chernyak , Jianle Chen , Dmitry Yurievich Kuryshev
IPC分类号： H04N19/117 , H04N19/124 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/61 , H04N19/82 , H04N19/105 , H04N19/129 , H04N19/60 , G06F1/03 , H04N19/80
CPC分类号： H04N19/117 , G06F1/03 , H04N19/105 , H04N19/124 , H04N19/129 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/60 , H04N19/61 , H04N19/80 , H04N19/82
摘要： A filter for video coding is configured for processing a block for generation of a filtered block, where the block comprises a plurality of pixels. The filter includes one or more processor configured to: scan a current pixel of the block and its neighboring pixels of the current pixel according to a predefined scan template, obtain spectrum components by performing transform for the current pixel and its neighboring pixels, obtain filtered spectrum components based on a filtering parameter and the spectrum components, obtain filtered pixels by performing inverse transform for the filtered spectrum components, and generate a filtered block based on the filtered pixels.
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15.发明授权公开(公告)号：US11381843B2
公开(公告)日：2022-07-05
申请号：US17240210
申请日：2021-04-26
发明人： Roman Igorevich Chernyak , Timofey Mikhailovich Solovyev , Sergey Yurievich Ikonin , Alexander Alexandrovich Karabutov , Jianle Chen
IPC分类号： H04N19/105 , H04N19/107 , H04N19/132 , H04N19/159 , H04N19/70 , H04N19/176 , H04N19/184
摘要： The present disclosure relates to methods and apparatuses for encoding video data into a bitstream and for decoding video data received in a bitstream. A second control flag indicating whether or not to use multi-hypothesis prediction for intra and inter mode is generated and transmitted only conditionally, upon a determination whether or not separate merge list technique for subblock merge candidates is used. On the other hand, a decoder is capable of deciding usage of multi-hypothesis prediction for intra and inter mode and separate merge list technique for subblock merge candidates even though the second control flag is transmitted only conditionally.
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公开(公告)号：US11375213B2
公开(公告)日：2022-06-28
申请号：US17368502
申请日：2021-07-06
IPC分类号： H04N11/02 , H04N19/186 , H04N19/176 , H04N19/44 , H04N19/60 , H04N19/70
摘要： A method of coding implemented by a decoding device or encoding device, the method comprising obtaining a bitstream, the bitstream comprises a transform unit syntax; the syntax comprises at least two cbf flags for chroma blocks (in an example, transform unit syntax correspond to either transform unit or sub-transform units which include two chroma cbf flags: tu_cbf_cb and tu_cbf_cb—one flag for each chroma plane), a chroma cbf flag specifies whether certain block has residue in correspondent color plane; deriving a value of a luma cbf flag tu_cbf_luma based on one or any combination of a value of a cu_cbf flag, values of two chroma cbf flags corresponding to a current transform unit or sub-transform unit, location of the sub-transform unit within transform unit, values of luma and chroma cbf flags correspondent to previous sub-transform units in the current transform unit.
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公开(公告)号：US20210337208A1
公开(公告)日：2021-10-28
申请号：US17371488
申请日：2021-07-09
发明人： Alexander Alexandrovich Karabutov , Timofey Mikhailovich Solovyev , Roman Igorevich Chernyak , Sergey Yurievich Ikonin , Jianle Chen
IPC分类号： H04N19/137 , H04N19/105 , H04N19/159 , H04N19/176
摘要： A method of determining a distance table of a merge with motion vector difference (MMVD) mode, wherein the method comprises determining a reference picture from at least one reference picture list of a current processing unit based on at least one parameter of the reference picture, and obtaining the distance table for the current processing unit based on the reference picture, wherein the at least one parameter of the reference picture comprises a picture order count (POC) number of the reference picture, a number of MMVD blocks of the reference picture, a reference picture list index of the reference picture, a reference picture index of the reference picture, and a quantization parameter (QP) of the reference picture.
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公开(公告)号：US20210218968A1
公开(公告)日：2021-07-15
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 , H04N19/132 , H04N19/105 , H04N19/46 , H04N19/186 , H04N19/176
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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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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