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公开(公告)号：US20230024482A1
公开(公告)日：2023-01-26
申请号：US17932632
申请日：2022-09-15
发明人： Ki Baek KIM
IPC分类号： H04N19/105 , H04N19/119 , H04N19/132 , H04N19/159 , H04N19/176
摘要： A method and device for video signal processing are provided. The method includes: an intra prediction mode of a current block is determined, a reference sample for intra prediction of the current block is determined, a predetermined matrix is determined based on the intra prediction mode, and the current block is predicted based on the reference sample and the matrix. The operation of predicting the current block based on the reference sample and the matrix includes a prediction block is generated by applying the matrix to the reference sample.
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公开(公告)号：US20230024256A1
公开(公告)日：2023-01-26
申请号：US17932627
申请日：2022-09-15
发明人： Ki Baek KIM
IPC分类号： H04N19/105 , H04N19/119 , H04N19/132 , H04N19/159 , H04N19/176
摘要： A method and device for video signal processing are provided. The method includes: an intra prediction mode of a current block is determined, a reference sample for intra prediction of the current block is determined, a predetermined matrix is determined based on the intra prediction mode, and the current block is predicted based on the reference sample and the matrix. The operation of predicting the current block based on the reference sample and the matrix includes a prediction block is generated by applying the matrix to the reference sample.
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公开(公告)号：US11563986B1
公开(公告)日：2023-01-24
申请号：US17551086
申请日：2021-12-14
申请人： NETFLIX, INC.
IPC分类号： H04N19/86 , H04N19/186 , H04N19/30 , H04N19/132 , G06N3/04 , H04N19/89
摘要： In various embodiments, a training application trains a machine learning model to preprocess images. In operation, the training application computes a chroma sampling factor based on a downscaling factor and a chroma subsampling ratio. The training application executes a machine learning model that is associated with the chroma sampling factor on data that corresponds to both an image and a first chroma component to generate preprocessed data corresponding to the first chroma component. Based on the preprocessed data, the training application updates at least one parameter of the machine learning model to generate a trained machine learning model that is associated with the first chroma component.
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公开(公告)号：US11563964B2
公开(公告)日：2023-01-24
申请号：US17360865
申请日：2021-06-28
申请人： TENCENT AMERICA LLC
IPC分类号： H04N19/00 , H04N19/44 , H04N19/132 , H04N19/117 , H04N19/176 , H04N19/30 , H04N19/70 , H04N19/186 , H04N19/124
摘要： Aspects of the disclosure include methods, apparatuses, and non-transitory computer-readable storage mediums for video encoding/decoding. An apparatus includes processing circuitry that determines reconstructed samples of a first color component in a filter support region of a current picture that is a part of a coded video sequence. The processing circuitry performs a filter process on the reconstructed samples of the first color component in the filter support region. A quantization step size of the filter process is separately set per one of a coding block, a video frame, and a video sequence. The processing circuitry reconstructs samples of a second color component in the filter support region based on an output value of the filter process. The second color component is different from the first color component.
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公开(公告)号：US11563933B2
公开(公告)日：2023-01-24
申请号：US16912660
申请日：2020-06-25
发明人： Vadim Seregin , Muhammed Zeyd Coban
IPC分类号： H04N19/105 , H04N19/117 , H04N19/137 , H04N19/46 , H04N19/132 , H04N19/51 , H04N19/159 , H04N19/176
摘要： Techniques are described for video encoding and decoding using reference picture resampling with switchable filters. One example involves obtaining a current picture and a reference picture, identifying filter index information for a current block of the current picture, and determining that a first picture size value of the current picture and a second picture size value of the reference picture are different. Based on the determining that the first picture size value of the current picture and the second picture size value of the reference picture are different, performing a resampling process using a default filter index in place of a current filter index identified by the filter index information. Additional examples can use the current filter index identified by the filter index information in subsequent blocks. In various examples, the current filter index can be derived or signaled.
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公开(公告)号：US20230020637A1
公开(公告)日：2023-01-19
申请号：US17950851
申请日：2022-09-22
申请人： Tencent America LLC
发明人： Madhu Peringassery KRISHNAN , Xin ZHAO , Shan LIU
IPC分类号： H04N19/60 , H04N19/46 , H04N19/18 , H04N19/176 , H04N19/124 , H04N19/132
摘要： Aspects of the disclosure provide a method and an apparatus including processing circuitry for video decoding. The processing circuitry can be configured to determine a transform skip for a transform block (TB) is in one direction. The processing circuitry can be configured to quantize transform coefficients in the TB based on a plurality of quantization steps. First transform coefficients in the TB can be quantized based on a smallest of the plurality of quantization steps. The first transform coefficients in the TB include one of a first row and a first column of the transform coefficients in the TB that has a DC spatial frequency, the one of the first row and the first column being along the one direction of the transform skip. Further, the processing circuitry can be configured to perform a transform on the quantized transform coefficients in the TB.
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公开(公告)号：US20230015739A1
公开(公告)日：2023-01-19
申请号：US17942366
申请日：2022-09-12
发明人： JUNYAN HUO , YANZHUO MA , WEI ZHANG
IPC分类号： H04N19/132 , H04N19/159 , H04N19/176 , H04N19/186 , G06F5/01 , G06F17/16
摘要： A method for colour component prediction, an encoder, a decoder and a storage medium are provided. The method includes that: prediction parameters of a current block are determined, the prediction parameters including a prediction mode parameter and a size parameter of the current block; when the prediction mode parameter indicates that a Matrix-based Intra Prediction (MIP) mode is adopted to determine an intra prediction value of the current block, an MIP weight matrix of the current block, a shift factor of the current block and an MIP input sample matrix of the current block are determined; and the intra prediction value of the current block is determined according to the MIP weight matrix, the shift factor and the MIP input sample matrix.
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公开(公告)号：US20230015210A1
公开(公告)日：2023-01-19
申请号：US17790928
申请日：2021-01-11
申请人： LG ELECTRONICS INC.
发明人： Moonmo KOO , Seunghwan KIM , Jaehyun LIM
IPC分类号： H04N19/18 , H04N19/176 , H04N19/186 , H04N19/132 , H04N19/124
摘要： An image decoding method according to the present document comprises the steps of: receiving residual information from a bitstream; deriving transform coefficients for a current block by performing inverse quantization on the basis of the residual information; and deriving modified transform coefficients by applying LFNST to the transform coefficients, wherein the inverse quantization is performed on the basis of a predetermined scaling list, and wherein whether to apply the scaling list can be derived on the basis of whether the LFNST is applied and a tree type of the current block.
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公开(公告)号：US20230013917A1
公开(公告)日：2023-01-19
申请号：US17946746
申请日：2022-09-16
申请人： Tencent America LLC
发明人： Xiaozhong XU , Shan LIU
IPC分类号： H04N19/70 , H04N19/132 , H04N19/176 , H04N19/46 , H04N19/80
摘要： A method for video decoding includes decoding prediction information for a current block in a current picture that is a part of a coded video sequence, the prediction information including a first syntax element and a second syntax element. The first syntax element indicates that a deblocking filter process is enabled for the current block, the deblocking filter process being applied to a boundary of the current block. The second syntax element indicates a number of samples to be used for calculating a boundary strength of the deblocking filter process. The method also includes determining the boundary strength of the deblocking filter process using the number of samples indicated by the second syntax element, and performing the deblocking filter process for the current block based on the boundary strength.
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公开(公告)号：US20230013167A1
公开(公告)日：2023-01-19
申请号：US17780719
申请日：2020-11-26
申请人： LG ELECTRONICS INC.
发明人： Hendry HENDRY , Hendry HENDRY , Seunghwan KIM
IPC分类号： H04N19/132 , H04N19/176 , H04N19/174 , H04N19/70
摘要： A video decoding method performed by a video decoding apparatus, according to the present document, may comprise the steps of: parsing, from a bitstream, number information about the number of slices having heights specifically signaled within a tile of a current picture; on the basis of the number information, parsing, from the bitstream, height information about the heights of the slices having the specifically signaled heights; deriving the number of slices within the tile on the basis of the number information and the height information; generating prediction samples by performing at least one of intra prediction and inter prediction on a current block of the current picture on the basis of the slices within the tile; and generating reconstructed samples on the basis of the prediction samples.
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