ALEXANDRIA, Va., May 12 -- United States Patent no. 12,627,829, issued on May 12, was assigned to TENCENT AMERICA LLC (Palo Alto, Calif.).

"Systems and methods for optical flow-based motion vector refinement" was invented by Han Gao (Palo Alto, Calif.), Xin Zhao (Palo Alto, Calif.), Liang Zhao (Palo Alto, Calif.), Jing Ye (Palo Alto, Calif.) and Shan Liu (Palo Alto, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An example method of video coding includes receiving a video bitstream comprising a plurality of blocks. The method also includes deriving a set of subblock motion vectors for a current subblock in a first block of the plurality of blocks, and deriving a set of refined subblock motion vectors ...