ALEXANDRIA, Va., June 5 -- United States Patent no. 12,278,989, issued on April 15, was assigned to Electronics and Telecommunications Research Institute (Daejeon, South Korea).

"Image encoding/decoding method and device, and recording medium in which bitstream is stored" was invented by Ha Hyun Lee (Seoul, South Korea), Jung Won Kang (Daejeon, South Korea), Sung Chang Lim (Daejeon, South Korea), Jin Ho Lee (Daejeon, South Korea) and Hui Yong Kim (Daejeon, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed herein is a method of decoding an image including determining whether a current block is in a bi-directional optical flow (BIO) mode, calculating gradient information of prediction sample...