公开(公告)号：US12113996B2

公开(公告)日：2024-10-08

申请号：US17983921

申请日：2022-11-09

Applicant: Tencent America LLC

Inventor： Nikolay Shlyakhov ,  Shan Liu

IPC: H04N19/42 ,  H04N19/117 ,  H04N19/159 ,  H04N19/176 ,  H04N19/423 ,  H04N19/433 ,  H04N19/44 ,  H04N19/80 ,  H04N19/82

CPC classification number: H04N19/439 ,  H04N19/117 ,  H04N19/159 ,  H04N19/176 ,  H04N19/423 ,  H04N19/433 ,  H04N19/44 ,  H04N19/80 ,  H04N19/82

Abstract: A filter with a central symmetric shape is applied to a current block. The filter includes a plurality of coefficients. Each of the plurality of coefficients is associated with a respective first coordinate value along a first axis and a respective second coordinate value along a second axis. The plurality of coefficients of the filter is grouped into a plurality of groups based on a transposition operation to be performed on the filter. The coefficients in each of the plurality of groups is a same distance from a center position of the filter. The coefficients of a first group of the plurality of groups are reordered based on the transposition operation. Filtered samples of the current block are reconstructed by applying the filter with the central symmetric shape to the current block based on the reordered coefficients of the filter.