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公开(公告)号：US20230130958A1
公开(公告)日：2023-04-27
申请号：US17792460
申请日：2021-01-14
发明人： Je Won Kang , Seung Wook Park , Wha Pyeong Lim
IPC分类号： H04N19/46 , H04N19/70 , H04N19/186 , H04N19/176
摘要： Disclosed is a method for video encoding and decoding using adaptive color transform on a residual signal. In particular, the maximum memory size required for adaptive color transform is limited by: controlling whether to allow color space conversion on a sequence level according to a syntax element indicating the maximum conversion size allowed for a sequence of pictures; or controlling whether to apply color space conversion on a block level according to the size of a coding block.
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公开(公告)号：US20230049587A1
公开(公告)日：2023-02-16
申请号：US17964386
申请日：2022-10-12
发明人： Je Won Kang , Sang Hyo Park , Seung Wook Park , Wha Pyeong Lim
IPC分类号： H04N19/127 , H04N19/103 , H04N19/13 , H04N19/132 , H04N19/136 , H04N19/184 , H04N19/186 , H04N19/187
摘要： A method and device for controlling coding tools are provided. The video decoding method includes decoding, from a high level of a bitstream, an enable flag indicating whether one or more coding tools are enabled. The coding tools includes a first coding tool that encodes sample values using luma component mapping based on a piecewise linear model. The method includes acquiring a value of an application flag depending on a value of the enable flag, by setting the application flag indicating whether to apply the coding tools to a predetermined value, or by decoding the application flag from a low level of the bitstream, the application flag including a first application flag indicating whether to apply the first coding tool. The coding tools are operated when the value of the application flag is a value indicating that the coding tools are applied.
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公开(公告)号：US20230029682A1
公开(公告)日：2023-02-02
申请号：US17964507
申请日：2022-10-12
发明人： Je Won Kang , Sang Hyo Park , Seung Wook Park , Wha Pyeong Lim
IPC分类号： H04N19/127 , H04N19/103 , H04N19/13 , H04N19/132 , H04N19/136 , H04N19/184 , H04N19/186 , H04N19/187
摘要： A method and device for controlling coding tools are provided. The video decoding method includes decoding, from a high level of a bitstream, an enable flag indicating whether one or more coding tools are enabled. The coding tools includes a first coding tool that encodes sample values using luma component mapping based on a piecewise linear model. The method includes acquiring a value of an application flag depending on a value of the enable flag, by setting the application flag indicating whether to apply the coding tools to a predetermined value, or by decoding the application flag from a low level of the bitstream, the application flag including a first application flag indicating whether to apply the first coding tool. The coding tools are operated when the value of the application flag is a value indicating that the coding tools are applied.
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公开(公告)号：US20220286686A1
公开(公告)日：2022-09-08
申请号：US17826302
申请日：2022-05-27
发明人： Je Won Kang , Seung Wook Park , Wha Pyeong Lim
IPC分类号： H04N19/132 , H04N19/105 , H04N19/159 , H04N19/186 , H04N19/176 , H04N19/70 , H04N19/46
摘要： Disclosed is a video encoding and decoding technology using a differential modulation technique for a residual signal in order to enhance compression performance in a transform skip mode. The differential modulation technique is applicable to both luma and chroma components as long as the chroma format is not monochrome (i.e. as long as chroma_format_idc=0 is not true).
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公开(公告)号：US20240179324A1
公开(公告)日：2024-05-30
申请号：US18426793
申请日：2024-01-30
发明人： Je Won Kang , Jung Kyung Lee , Seung Wook Park , Jin Heo
IPC分类号： H04N19/154 , H04N19/172 , H04N19/46
CPC分类号： H04N19/154 , H04N19/172 , H04N19/46
摘要： A method and an apparatus are disclosed for video coding using an improved in-loop filter. The video coding method and the apparatus generate a residual frame from a reconstructed frame using a deep learning model. The video coding method and the apparatus improve performance of an in-loop filter by approximating an original residual frame by applying the generated residual frame to a linear model.
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36.发明公开公开(公告)号：US20240155153A1
公开(公告)日：2024-05-09
申请号：US18412841
申请日：2024-01-15
发明人： Je Won Kang , Hye Sun Jeong , Seung Wook Park , Jin Heo
IPC分类号： H04N19/593 , H04N19/176 , H04N19/184
CPC分类号： H04N19/593 , H04N19/176 , H04N19/184
摘要： A method and an apparatus are disclosed for video coding for refining predicted signals of intra prediction based on deep learning. The video coding method and the apparatus generate a refined intra predicted signal to improve video coding efficiency and video quality. The video coding method and the apparatus adaptively input a prediction block according to intra prediction of a current block, block information related to the current block, and neighboring reconstructed reference samples into a deep learning network.
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公开(公告)号：US11917181B2
公开(公告)日：2024-02-27
申请号：US18093605
申请日：2023-01-05
发明人： Je Won Kang , Sang Hyo Park , Seung Wook Park , Wha Pyeong Lim
IPC分类号： H04N19/44 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/70
CPC分类号： H04N19/44 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/70
摘要： A method and apparatus for intra-prediction coding of video data are provided. The apparatus includes a decoder that is configured to decode, from a bitstream, a syntax element indicating an intra-prediction type of a current block of the video data, and an intra-predictor that is configured to generate a prediction block for the current block by selectively performing matrix based intra-prediction or regular intra-prediction based on the intra-prediction type of the current block indicated by the syntax element.
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公开(公告)号：US11838538B2
公开(公告)日：2023-12-05
申请号：US17868893
申请日：2022-07-20
发明人： Je Won Kang , Seung Wook Park , Wha Pyeong Lim
IPC分类号： H04N19/52 , H04N19/132 , H04N19/176 , H04N19/70
CPC分类号： H04N19/52 , H04N19/132 , H04N19/176 , H04N19/70
摘要： A video decoding apparatus is provided for decoding pictures using inter-prediction. The video decoding apparatus includes a predictor that generates affine prediction samples for respective subblocks in a target block in a current picture to be decoded by performing affine motion prediction on a subblock-by-subblock basis using control point motion vectors which respectively correspond to corners of the target block. The predictor also modifies sample values of the affine prediction samples by executing a first coding tool, the first coding tool compensating for motion according to sample positions in each of the subblocks using the control point motion vectors.
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公开(公告)号：US20220385940A1
公开(公告)日：2022-12-01
申请号：US17767013
申请日：2020-09-24
发明人： Je Won Kang , Seung Wook Park , Wha Pyeong Lim
IPC分类号： H04N19/577 , H04N19/105 , H04N19/176 , H04N19/139
摘要： A video decoding apparatus predicts a target block in a current picture to be decoded. The apparatus comprises a predictor configured to: determine first and second reference pictures and first and second motion vectors for bi-prediction by decoding a bitstream; generate a first reference block from the first reference picture referenced by the first motion vector and generate a second reference block from the second reference picture referenced by the second motion vector; and generate a prediction block of the target block using the first and second reference blocks. The predictor includes a first coding tool configured to generate the prediction block of the target block by performing a bi-directional optical flow process using the first and second reference blocks.
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公开(公告)号：US11516472B2
公开(公告)日：2022-11-29
申请号：US17286798
申请日：2020-06-22
发明人： Je Won Kang , Sang Hyo Park , Seung Wook Park , Wha Pyeong Lim
IPC分类号： H04N19/127 , H04N19/103 , H04N19/13 , H04N19/132 , H04N19/136 , H04N19/184 , H04N19/186 , H04N19/187
摘要： A method and device for controlling coding tools are provided. The video decoding method includes decoding, from a high level of a bitstream, an enable flag indicating whether one or more coding tools are enabled. The coding tools includes a first coding tool that encodes sample values using luma component mapping based on a piecewise linear model. The method includes acquiring a value of an application flag depending on a value of the enable flag, by setting the application flag indicating whether to apply the coding tools to a predetermined value, or by decoding the application flag from a low level of the bitstream, the application flag including a first application flag indicating whether to apply the first coding tool. The coding tools are operated when the value of the application flag is a value indicating that the coding tools are applied.
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