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11. 发明申请

WO2020015433A1 METHOD AND APPARATUS FOR INTRA PREDICTION USING CROSS-COMPONENT LINEAR MODEL 审中-公开
公开(公告)号：WO2020015433A1
公开(公告)日：2020-01-23
申请号：PCT/CN2019/085133
申请日：2019-04-30
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： MA, Xiang , ZHAO, Yin , YANG, Haitao , CHEN, Jianle
IPC分类号： H04N19/117 , H04N19/176 , H04N19/593
摘要： An method for encoding a video data block includes down-sampling a reconstructed luma block to obtain a down-sampled luma block, determining a max luma value and a min luma value from reconstructed neighboring luma samples above the reconstructed luma block or reconstructed neighboring luma samples left of the reconstructed luma block, deriving, based on positions of the max luma value and the min luma value, a first chroma value and a second chroma value corresponding to the respective max luma value and min luma value from reconstructed neighboring chroma samples of the target chroma block, calculating parameters of a cross-component linear model (CCLM) prediction mode based on the max and min luma values and the first and second chroma values, and generating predicted chroma values of the target chroma block based on the parameters and the down-sampled luma block.

12. 发明公开

EP4432672A2 CHROMA BLOCK PREDICTION METHOD AND DEVICE 审中-实审
公开(公告)号：EP4432672A2
公开(公告)日：2024-09-18
申请号：EP24167959.6
申请日：2019-09-05
申请人： Huawei Technologies Co., Ltd.
发明人： MA, Xiang , YANG, Haitao , CHEN, Jianle
IPC分类号： H04N19/80
CPC分类号： H04N19/186 , H04N19/117 , H04N19/70
摘要： The present invention provides a chroma block prediction method and a device. The method includes: parsing a bitstream to obtain first indication information, where the first indication information is used to indicate a filter type; downsampling a first luma block by using a filter corresponding to the filter type, to obtain a second luma block, where the first luma block is a luma block corresponding to a current chroma block; obtaining a template chroma sample and a template luma sample, where the template chroma sample includes a plurality of neighboring chroma samples of the current chroma block, and the template luma sample is obtained by performing a downsampling operation on a plurality of neighboring luma samples of the first luma block; obtaining linear model coefficients based on the template chroma sample and the template luma sample; and obtaining a prediction value of the current chroma block based on the second luma block and the linear model coefficients.

13. 发明公开

EP3883244A1 INTER-FRAME PREDICTION METHOD AND RELATED DEVICE 审中-实审
公开(公告)号：EP3883244A1
公开(公告)日：2021-09-22
申请号：EP19892023.3
申请日：2019-12-02
申请人： Huawei Technologies Co., Ltd.
发明人： YANG, Haitao , MU, Fan , ZHANG, Lian , MA, Xiang
IPC分类号： H04N19/139
摘要： This application provides an inter prediction method and a related apparatus. The method includes: parsing a bitstream to determine prediction information of a to-be-processed picture block, where when the prediction information indicates that a prediction direction of the to-be-processed picture block is bidirectional prediction, the bitstream does not include target identification information, where the target identification information is used to indicate to perform local illumination compensation LIC on the to-be-processed picture block; and obtaining a prediction value of the to-be-processed picture block based on the prediction information. According to the foregoing technical solutions, a video decoding speed can be accelerated without greatly affecting video quality.

14. 发明公开

EP3837838A1 METHOD AND APPARATUS FOR CODING IMAGE OF VIDEO SEQUENCE, AND TERMINAL DEVICE 有权
公开(公告)号：EP3837838A1
公开(公告)日：2021-06-23
申请号：EP18932920.4
申请日：2018-09-05
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： SETHURAMAN, Sriram , A, Jeeva Raj , KOTECHA, Sagar , MA, Xiang
IPC分类号： H04N19/21

15. 发明公开

EP4362464A3 PICTURE PREDICTION METHOD AND APPARATUS, AND CODEC 审中-实审
公开(公告)号：EP4362464A3
公开(公告)日：2024-05-29
申请号：EP23219999.2
申请日：2018-12-27
申请人： Huawei Technologies Co., Ltd.
发明人： MA, Xiang , YANG, Haitao , CHEN, Huanbang , GAO, Shan
IPC分类号： H04N19/577 , H04N19/56 , H04N19/176 , H04N19/52
CPC分类号： H04N19/176 , H04N19/52 , H04N19/577 , H04N19/56
摘要： This application provides a picture prediction method and apparatus, and a codec. The method includes: obtaining initial motion information of a current picture block; determining positions of N forward reference blocks and positions of N backward reference blocks based on the initial motion information and a position of the current picture block; determining, from positions of M pairs of reference blocks based on a matching cost criterion, that positions of a pair of reference blocks are a position of a target forward reference block of the current picture block and a position of a target backward reference block of the current picture block, where positions of each pair of reference blocks include a position of a forward reference block and a position of a backward reference block; and for the positions of each pair of reference blocks, a first position offset and a second position offset are in a mirror relationship; and obtaining a predicted value of a pixel value of the current picture block based on a pixel value of the target forward reference block and a pixel value of the target backward reference block. This application can improve picture prediction accuracy and reduce picture prediction complexity.

16. 发明公开

EP4210327A1 INTRA FRAME PREDICTION METHOD AND DEVICE 审中-实审
公开(公告)号：EP4210327A1
公开(公告)日：2023-07-12
申请号：EP21871636.3
申请日：2021-09-26
申请人： Huawei Technologies Co., Ltd.
发明人： YANG, Haitao , SONG, Nan , CHEN, Xu , MA, Xiang , CHEN, Huanbang , ZHAO, Yin
IPC分类号： H04N19/11
摘要： This application provides an intra prediction method and an apparatus. This application relates to the field of artificial intelligence (AI)-based video or picture compression technologies, and in particular, to the field of neural network-based video compression technologies. The method includes: obtaining respective intra prediction modes or texture distributions of P reconstructed picture blocks in a surrounding region of a current block; obtaining, based on the respective intra prediction modes or texture distributions of the P reconstructed picture blocks, Q priori candidate intra prediction modes of the current block and Q probability values; obtaining, based on M probability values corresponding to M priori candidate intra prediction modes, M weighting factors corresponding to the M priori candidate intra prediction modes; separately performing intra prediction based on the M priori candidate intra prediction modes to obtain M predicted values; and obtaining a predicted value of the current block based on a weighted summation of the M predicted values and the corresponding M weighting factors. This application can improve accuracy of intra prediction, reduce an error of intra prediction, and improve RDO efficiency of intra prediction.

17. 发明公开

EP4207766A1 ENTROPY ENCODING/DECODING METHOD AND DEVICE 审中-实审
公开(公告)号：EP4207766A1
公开(公告)日：2023-07-05
申请号：EP21874376.3
申请日：2021-09-26
申请人： Huawei Technologies Co., Ltd.
发明人： MAO, Jue , YANG, Haitao , MA, Xiang
IPC分类号： H04N19/91
摘要： This application provides an entropy encoding/decoding method and apparatus; and relates to the field of artificial intelligence (AI)-based video or picture compression technologies, and in particular, to the field of neural network-based video compression technologies. The method includes: obtaining base layer information of a to-be-encoded picture block, where the base layer information corresponds to M samples in the picture block, and M is a positive integer; obtaining K elements corresponding to enhancement layer information of the picture block, where the enhancement layer information corresponds to N samples in the picture block, both K and N are positive integers, and N≥M; inputting the base layer information into a neural network to obtain K groups of probability values, where the K groups of probability values correspond to the K elements, and any group of probability values is for representing probabilities of a plurality of candidate values of a corresponding element; and performing entropy encoding on the K elements based on the K groups of probability values. This application can improve entropy encoding/decoding efficiency.

18. 发明公开

EP3907995A1 CHROMA BLOCK PREDICTION METHOD AND DEVICE 有权
公开(公告)号：EP3907995A1
公开(公告)日：2021-11-10
申请号：EP19907227.3
申请日：2019-12-10
申请人： Huawei Technologies Co., Ltd.
发明人： MA, Xiang , MU, Fan , ZHAO, Yin , YANG, Haitao
IPC分类号： H04N19/182 , H04N19/593 , H04N19/186
摘要： This application provides a chroma block prediction method and apparatus, and pertains to the field of video encoding and decoding technologies. The method includes: obtaining chroma values of chroma samples at preset locations from neighboring samples of a chroma block; obtaining, based on neighboring samples of a luma block corresponding to the chroma block, luma values of luma samples corresponding to the chroma samples; classifying the obtained luma values into a first luma set and a second luma set; grouping the chroma values into a first chroma set and a second chroma set; determining a scaling coefficient in a linear model based on an average value of luma values in the first luma set, an average value of luma values in the second luma set, an average value of chroma values in the first chroma set, and an average value of chroma values in the second chroma set; determining, based on the scaling coefficient, an offset factor in a linear model corresponding to the chroma block; and determining prediction information of the chroma block based on the scaling coefficient, the offset factor, and luma reconstruction information corresponding to the chroma block. In this way, chroma block prediction efficiency can be improved.

19. 发明公开

EP3815377A1 VIDEO ENCODER, VIDEO DECODER, AND CORRESPONDING ENCODING AND DECODING METHODS 有权
公开(公告)号：EP3815377A1
公开(公告)日：2021-05-05
申请号：EP19837624.6
申请日：2019-07-16
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： MA, Xiang , ZHAO, Yin , YANG, Haitao , CHEN, Jianle
IPC分类号： H04N19/593 , H04N19/59

20. 发明公开

EP3734976A1 IMAGE PREDICTION METHOD AND DEVICE AND CODEC 无效
公开(公告)号：EP3734976A1
公开(公告)日：2020-11-04
申请号：EP18895955.5
申请日：2018-12-27
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： MA, Xiang , YANG, Haitao , CHEN, Huanbang , GAO, Shan
IPC分类号： H04N19/50
摘要： This application provides a picture prediction method and apparatus, and a codec. The method includes: obtaining initial motion information of a current picture block; determining positions of N forward reference blocks and positions of N backward reference blocks based on the initial motion information and a position of the current picture block; determining, from positions of M pairs of reference blocks based on a matching cost criterion, that positions of a pair of reference blocks are a position of a target forward reference block of the current picture block and a position of a target backward reference block of the current picture block, where positions of each pair of reference blocks include a position of a forward reference block and a position of a backward reference block; and for the positions of each pair of reference blocks, a first position offset and a second position offset are in a mirror relationship; and obtaining a predicted value of a pixel value of the current picture block based on a pixel value of the target forward reference block and a pixel value of the target backward reference block. This application can improve picture prediction accuracy and reduce picture prediction complexity.

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