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公开(公告)号：EP4152750A1
公开(公告)日：2023-03-22
申请号：EP21834647.6
申请日：2021-06-24
发明人： SUN, Yucheng , CAO, Xiaoqiang , CHEN, Fangdong , WANG, Li
IPC分类号： H04N19/176
摘要： Provided by the present application are an encoding and decoding method and apparatus, and a device therefor. The method comprises: acquiring weight prediction angles and weight configuration parameters; configuring reference weight values for surrounding positions outside of a current block according to the weight configuration parameters; determining surrounding matching positions pointed to by pixel positions from the surrounding positions outside of the current block according to the weight prediction angles; determining a target weight value of the pixel positions according to a reference weight value associated with the surrounding matching positions, and determining an associated weight value of the pixel positions according to the target weight value of the pixel positions; determining a first predicted value of the pixel positions according to first target motion information, and determining a second predicted value of the pixel positions according to second target motion information; determining a weighted prediction value of the pixel positions according to the first predicted value, the target weight value, the second predicted value and the associated weight value; and determining a weighted prediction value of the current block according to weighted prediction values of all pixel positions. The prediction accuracy is improved by means of the present application.
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公开(公告)号：EP3923575A1
公开(公告)日：2021-12-15
申请号：EP20770441.2
申请日：2020-03-09
发明人： CAO, Xiaoqiang , XU, Liying , CHEN, Fangdong
IPC分类号： H04N19/122
摘要： The present invention relates to the field of audio and video techniques. Provided are methods for performing encoding and decoding, an encoding end, a decoding end, and a system. The method comprises: a decoding end acquiring encoded data of a current block; if the current block meets a sub-partition condition and the current block is determined to activate intra-frame sub-partition according to the encoded data of the current block, then determining, according to sub-partition information of the current block, size information and shape information of each respective sub-partition; if each sub-partition has a width meeting a first dimension limit condition and a shape meeting a first condition, then determining that DST7 is a horizontal transformation kernel in a transformation kernel pair corresponding to the sub-partition; if each sub-partition has a height meeting a second dimension limit condition and a shape meeting a second condition, then determining that DST7 is a vertical transformation kernel in the transformation kernel pair corresponding to the sub-partition; and performing inverse transformation operations on inversely quantized data of the respective sub-partitions according to the transformation kernel pairs corresponding to the respective sub-partitions. The present disclosure can enhance encoding and decoding performance.
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公开(公告)号：EP4277267A1
公开(公告)日：2023-11-15
申请号：EP22758868.8
申请日：2022-02-22
发明人： CHEN, Fangdong , CAO, Xiaoqiang , SUN, Yucheng
IPC分类号： H04N19/117
摘要： In the present disclosure, an encoding and decoding method and apparatus and devices thereof are provided. The method may include: if a current pixel point in a current block satisfies an enable condition of an enhanced refinement mode, determining a gradient value of the current pixel point based on an original pixel value of the current pixel point and an original pixel value of a surrounding pixel point of the current pixel point; based on the gradient value of the current pixel point and the original pixel value of the current pixel point, determining a refined pixel value of the current pixel point. The technical solutions of the present disclosure can improve the encoding performance.
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公开(公告)号：EP4099693A1
公开(公告)日：2022-12-07
申请号：EP21774886.2
申请日：2021-03-23
发明人： CAO, Xiaoqiang
IPC分类号： H04N19/117
摘要： Decoding, encoding, and encoding/decoding methods, apparatuses and devices are provided. A decoding method includes: if an inter prediction filter enable flag indicates that a current block is allowed to be coded in inter prediction filter mode, and the current block satisfies inter prediction filter conditions, parsing an inter prediction filter flag of the current block from bitstream data of the current block; if the inter prediction filter flag indicates that a filter type of the current block is the inter prediction filter, obtaining a target prediction value of the current block by performing an inter prediction filter process on the current block; if the inter prediction filter flag indicates that the filter type of the current block is enhanced inter prediction filter, obtaining a target prediction value of the current block by performing an enhanced inter prediction filter process on the current block.
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公开(公告)号：EP3913917A1
公开(公告)日：2021-11-24
申请号：EP20769784.8
申请日：2020-03-09
发明人： CAO, Xiaoqiang , CHEN, Fangdong , WANG, Li
IPC分类号： H04N19/13 , H04N19/103 , H04N19/159
摘要： The present disclosure relates to the field of audio and video techniques. Provided are methods for performing encoding and decoding, a decoding end and an encoding end. The method comprises: acquiring encoded data of a current block; acquiring, from the encoded data, an index of a transform kernel pair associated with the current block, wherein adaptive binary arithmetic decoding is performed on a first bit of a binarized codeword corresponding to the index of the transform kernel pair on the basis of a context model; and determining the transform kernel pair corresponding to the current block according to the index of the transform kernel pair, wherein the transform kernel pair comprises a horizontal transform kernel and a vertical transform kernel. The present disclosure facilitates enhancing encoding and decoding performance.
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6.发明公开
公开(公告)号：EP4333429A1
公开(公告)日：2024-03-06
申请号：EP22831623.8
申请日：2022-06-06
发明人： CAO, Xiaoqiang , CHEN, Fangdong , WANG, Li
IPC分类号： H04N19/103 , H04N19/44 , H04N19/51
摘要： Decoding methods and apparatuses, coding methods and apparatuses, devices and machine-readable storage media are provided. In an example of the decoding method, for a received bitstream, by parsing a motion information index value of a skip mode or a direct mode of a current coding unit, a candidate list of the skip mode or the direct mode may be constructed, and determining a prediction mode of the current coding unit, thus, motion compensation can be performed on the current coding unit according to motion information of the current coding unit acquired from the prediction mode of the current coding unit. The motion information index value of the skip mode or the direct mode of the current coding unit is obtained by parsing according to the number of motion vector angle prediction candidate motion information and the number of inter-prediction candidate historical motion vector prediction information.
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7.发明公开
公开(公告)号：EP4280605A1
公开(公告)日：2023-11-22
申请号：EP22770458.2
申请日：2022-03-14
发明人： CAO, Xiaoqiang , SUN, Yucheng , CHEN, Fangdong
IPC分类号： H04N19/517
摘要： The present application provides methods, apparatuses, devices and storage media for decoding and encoding. The decoding method comprises: obtaining a value of an Enhanced Temporal Motion Vector Prediction (ETMVP) mode flag and an ETMVP mode index value for a current coding unit (CU); when the value of the ETMVP mode flag is a first value, determining coordinate information of an initial matching CU of the current CU according to coordinate information of the current CU; constructing an enhanced temporal candidate list based on the coordinate information of the initial matching CU; determining coordinate information of a target matching CU according to the ETMVP mode index value; and determining motion information of a subblock at a corresponding position in the current CU according to the motion information of the target matching CU. The method can improve the encoding and decoding performance effectively.
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