公开(公告)号：US20210127115A1

公开(公告)日：2021-04-29

申请号：US17142957

申请日：2021-01-06

Applicant: Huawei Technologies Co., Ltd.

Inventor： Semih ESENLIK ,  Ivan KRASNOV

IPC: H04N19/132 ,  H04N19/117 ,  H04N19/82 ,  H04N19/46 ,  H04N19/176

Abstract: The present disclosure relates to adaptive filtering, e.g. adaptive loop filtering, which may be used during encoding and decoding of video pictures. In particular, the present disclosure provides for determining a zero coefficients map, in which each bit indicates whether or not a respective filter coefficient of a supporting region is to be included into the bitstream for an adaptive filter. An indication of the zero coefficients map is included into the bitstream before at least one filter coefficient of the adaptive filter indicated by the zero coefficients map as to be included into the bitstream. The provision of a zero coefficients map enables an efficient signaling and allows for flexible filter shapes that are particularly suitable for the content at hand.

公开(公告)号：US20220394291A1

公开(公告)日：2022-12-08

申请号：US17832353

申请日：2022-06-03

Applicant: Huawei Technologies Co., Ltd.

Inventor： Semih ESENLIK ,  Ivan KRASNOV ,  Zhijie ZHAO ,  Jianle CHEN

IPC: H04N19/563 ,  H04N19/103 ,  H04N19/176 ,  H04N19/57 ,  H04N19/80 ,  H04N19/172 ,  H04N19/513 ,  H04N19/55 ,  H04N19/56 ,  H04N19/577

Abstract: The present disclosure relates to motion vector determination using template or bilateral matching and predictor generation based on the motion vector. The template or bilateral matching and/or the predictor generation use interpolation filtering. The interpolation filtering operation accesses integer sample positions within a window, and further uses padded sample values for integer sample positions outside the window, which are based on at least one sample within said window, and uses the accessed integer sample position values as well as the padded sample values to perform the template or bilateral matching and/or predictor generation.

公开(公告)号：US20210195232A1

公开(公告)日：2021-06-24

申请号：US17135624

申请日：2020-12-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Semih ESENLIK ,  Zhijie ZHAO ,  Ivan KRASNOV ,  Jianle CHEN

IPC: H04N19/513 ,  H04N19/172 ,  H04N19/55 ,  H04N19/56 ,  H04N19/176 ,  H04N19/57 ,  H04N19/577

Abstract: An apparatus and method determining a motion vector for a block, which relates to motion vector determination employing template matching or bilateral matching, are provided. At first, candidate motion vectors are obtained and are mapped to respective representatives (representative motion vectors). In particular, if the obtained candidate motion vectors point to fractional positions and thus, interpolation from the integer sample positions is required, the initial motion vector is rounded to a closest integer sample position. The rounded position is then used to define the search space for the template or bilateral matching to determine the best matching motion vector for the block (in other words, a refinement of an initial motion vector around which the candidate space is spanned). Finally, the mapping operation can be reverted in order to obtain a result in the original search space.