公开(公告)号：US20210227243A1

公开(公告)日：2021-07-22

申请号：US17221184

申请日：2021-04-02

申请人： Huawei Technologies Co., Ltd. ,  University of Science and Technology of China

发明人： Feng WU ,  Ning YAN ,  Dong LIU ,  Houqiang LI ,  Haitao YANG

IPC分类号： H04N19/51 ,  H04N19/176 ,  H04N19/42 ,  H04N19/80

摘要： Embodiments of this application disclose an interpolation filter training method and apparatus, a video picture encoding and decoding method, an encoder, and a decoder. According to the training method, a first sub-pixel picture obtained through interpolation by using a conventional interpolation filter is used as label data, to train a second interpolation filter, so that the second interpolation filter obtained through training can be directly used for a pixel value, obtained through interpolation, of a first fractional pixel position. Therefore, the label data is more accurate, and coding performance of a video picture is improved. According to the encoding method, during inter prediction, a target interpolation filter used for a current encoding picture block is determined from a set of candidate interpolation filters, and the encoder selects, according to content of the current encoding picture block, an appropriate interpolation filter to perform an interpolation operation.