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公开(公告)号：US20230064033A1
公开(公告)日：2023-03-02
申请号：US17975133
申请日：2022-10-27
发明人： Vadim SEREGIN , Jianle Chen , Sun-il Lee , Tammy Lee
IPC分类号： H04N19/13 , H04N19/46 , H04N19/593 , H04N19/463 , H04N19/186
摘要： Methods and apparatuses for encoding and decoding an intra prediction mode of a prediction unit of a chrominance component based on an intra prediction mode of a prediction unit of a luminance component are provided. When an intra prediction mode of a prediction unit of a luminance component is the same as an intra prediction mode in an intra prediction mode candidate group of a prediction unit of a chrominance component, reconstructing the intra prediction mode candidate group of the prediction unit of the chrominance component by excluding or replacing an intra prediction mode of the prediction unit of the chrominance component which is same as an intra prediction mode of the prediction unit of the luminance component from the intra prediction mode candidate group, and encoding the intra prediction mode of the prediction unit of the chrominance component by using the reconstructed intra prediction mode candidate group.
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公开(公告)号：US11303883B2
公开(公告)日：2022-04-12
申请号：US16939663
申请日：2020-07-27
发明人： Chang-Hyun Lee , Tammy Lee , Jianle Chen , Dae-sung Cho , Woo-jin Han , Il-koo Kim
IPC分类号： H04N19/103 , H04N19/119 , H04N19/176 , H04N19/57 , H04N19/46 , H04N19/61
摘要： A video encoding method and apparatus and a video decoding method and apparatus are provided. The video encoding method includes: prediction encoding in units of a coding unit as a data unit for encoding a picture, by using partitions determined based on a first partition mode and a partition level, so as to select a partition for outputting an encoding result from among the determined partitions; and encoding and outputting partition information representing a first partition mode and a partition level of the selected partition. The first partition mode represents a shape and directionality of a partition as a data unit for performing the prediction encoding on the coding unit, and the partition level represents a degree to which the coding unit is split into partitions for detailed motion prediction.
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公开(公告)号：US20210266554A1
公开(公告)日：2021-08-26
申请号：US17314475
申请日：2021-05-07
发明人： Vadim SEREGIN , Jianle Chen , Sun-il Lee , Tammy Lee
IPC分类号： H04N19/13 , H04N19/46 , H04N19/593 , H04N19/463 , H04N19/186
摘要： Methods and apparatuses for encoding and decoding an intra prediction mode of a prediction unit of a chrominance component based on an intra prediction mode of a prediction unit of a luminance component are provided. When an intra prediction mode of a prediction unit of a luminance component is the same as an intra prediction mode in an intra prediction mode candidate group of a prediction unit of a chrominance component, reconstructing the intra prediction mode candidate group of the prediction unit of the chrominance component by excluding or replacing an intra prediction mode of the prediction unit of the chrominance component which is same as an intra prediction mode of the prediction unit of the luminance component from the intra prediction mode candidate group, and encoding the intra prediction mode of the prediction unit of the chrominance component by using the reconstructed intra prediction mode candidate group.
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公开(公告)号：US10893277B2
公开(公告)日：2021-01-12
申请号：US16680133
申请日：2019-11-11
发明人： Tammy Lee , Jianle Chen
IPC分类号： H04N19/159 , H04N19/105 , H04N19/176 , H04N19/11 , H04N19/136 , H04N19/182 , H04N19/593
摘要： A method and apparatus for intra predicting a video. The method includes: determining availability of a predetermined number of adjacent pixels used for intra prediction of a current block; if a first adjacent pixel is unavailable, searching for a second adjacent pixel that is available by searching the predetermined number of adjacent pixels in a predetermined direction based on the first adjacent pixel; and replacing a pixel value of the first adjacent pixel with a pixel value of a found second adjacent pixel. At least one third adjacent pixel in another location, which is not available and excludes the first adjacent pixel at a predetermined location, is to sequentially replaced by using a directly adjacent pixel in a predetermined direction.
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公开(公告)号：US10743026B2
公开(公告)日：2020-08-11
申请号：US16561766
申请日：2019-09-05
发明人： Yoon-mi Hong , Woo-jin Han , Min-su Cheon , Jianle Chen
IPC分类号： H04N19/60 , H04N19/126 , H04N19/625 , G06F17/14 , H04N19/176
摘要： A video encoding method, a video encoding apparatus, a video decoding method, and a video decoding apparatus are provided. The video encoding method includes producing a fast transform matrix based on a transform matrix which is used for frequency transformation on a block which has a predetermined size; producing a transformed block by transforming the block having the predetermined size by using the fast transform matrix; and performing scaling with respect to the transformed block in order to correct a difference between the transform matrix used for the frequency transformation and the fast transform matrix.
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公开(公告)号：US10257517B2
公开(公告)日：2019-04-09
申请号：US15457154
申请日：2017-03-13
发明人： Tammy Lee , Jianle Chen
IPC分类号： H04N19/18 , H04N19/13 , H04N19/30 , H04N19/119 , H04N19/136 , H04N19/176 , H04N19/61 , H04N19/96 , H04N19/157 , H04N19/426 , H04N19/60 , H04N19/91 , H04N19/12 , H04N19/186 , H04N19/46 , H04N19/70 , H04N19/184
摘要： Provided are video encoding and decoding methods and apparatuses. The video encoding method includes: encoding a video based on data units having a hierarchical structure; determining a context model used for entropy encoding a syntax element of a data unit based on at least one piece of additional information of the data units; and entropy encoding the syntax element by using the determined context model.
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公开(公告)号：US10085037B2
公开(公告)日：2018-09-25
申请号：US14723992
申请日：2015-05-28
发明人： Tammy Lee , Jianle Chen
IPC分类号： H04N19/51 , H04N19/13 , H04N19/61 , H04N19/91 , H04N19/52 , H04N19/593 , H04N19/82 , H04N19/96
CPC分类号： H04N19/52 , H04N19/13 , H04N19/51 , H04N19/593 , H04N19/61 , H04N19/82 , H04N19/91 , H04N19/96
摘要： Provided are a method and apparatus for intra predicting an image, which generate a prediction value via linear interpolation in horizontal and vertical directions of a current prediction unit. The method includes: generating first and second virtual pixels by using at least one adjacent pixel located upper right and lower left to a current prediction unit; obtaining a first prediction value of a current pixel via linear interpolation using an adjacent left pixel located on the same line as the first virtual pixel and the current pixel; obtaining a second prediction value of the current pixel via linear interpolation using an adjacent upper pixel located on the same column as the second virtual pixel and the current pixel; and obtaining a prediction value of the current pixel by using the first and second prediction values.
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公开(公告)号：US09942549B2
公开(公告)日：2018-04-10
申请号：US15416776
申请日：2017-01-26
发明人： Min-su Cheon , Woo-jin Han , Hae-kyung Jung , Il-koo Kim , Tammy Lee , Jianle Chen
IPC分类号： H04N19/30 , H04N19/122 , H04N19/159 , H04N19/13 , H04N19/124 , H04N19/119
CPC分类号： H04N19/122 , G06T9/00 , H04N19/107 , H04N19/119 , H04N19/124 , H04N19/13 , H04N19/147 , H04N19/159 , H04N19/176 , H04N19/182 , H04N19/30 , H04N19/50 , H04N19/503 , H04N19/60 , H04N19/61 , H04N19/91 , H04N19/96
摘要： A method of decoding an image in which wherein, when a prediction mode is an inter prediction mode, not an intra prediction mode, a size of at least one prediction unit in the coding unit is determined independently from a size of at least one transformation unit in the coding unit.
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公开(公告)号：US09877028B2
公开(公告)日：2018-01-23
申请号：US15212802
申请日：2016-07-18
发明人： Vadim Seregin , Jianle Chen
IPC分类号： H04N7/12 , H04N19/129 , H04N19/60 , H04N19/96 , H04N19/136 , H04N19/18 , H04N19/186 , H04N19/625
CPC分类号： H04N19/129 , H04N19/136 , H04N19/18 , H04N19/186 , H04N19/60 , H04N19/625 , H04N19/96
摘要： Provided are encoding and decoding methods and apparatuses for a video by selectively determining and using a scan mode. The video encoding method includes: generating transformation coefficients by performing transformation based on a transformation unit to encode an image; determining a scan mode, from among a plurality of scan modes, indicating a scanning direction of the generated transformation coefficients, based on characteristics of the transformation coefficients; and determining and outputting an encoding order of the generated transformation coefficients based on the scanning direction of the determined scan mode.
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公开(公告)号：US09787983B2
公开(公告)日：2017-10-10
申请号：US14831043
申请日：2015-08-20
发明人： Chang-Hyun Lee , Tammy Lee , Jianle Chen , Dae-Sung Cho , Woo-Jin Han , Il-Koo Kim
IPC分类号： H04N7/12 , H04N11/02 , H04N11/04 , H04N19/103 , H04N19/61 , H04N19/119 , H04N19/57
CPC分类号： H04N19/103 , H04N19/119 , H04N19/176 , H04N19/46 , H04N19/57 , H04N19/61
摘要： A video encoding method and apparatus and a video decoding method and apparatus are provided. The video encoding method includes: prediction encoding in units of a coding unit as a data unit for encoding a picture, by using partitions determined based on a first partition mode and a partition level, so as to select a partition for outputting an encoding result from among the determined partitions; and encoding and outputting partition information representing a first partition mode and a partition level of the selected partition. The first partition mode represents a shape and directionality of a partition as a data unit for performing the prediction encoding on the coding unit, and the partition level represents a degree to which the coding unit is split into partitions for detailed motion prediction.
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