ALEXANDRIA, Va., May 19 -- United States Patent no. 12,634,447, issued on May 19, was assigned to HANGZHOU HIKVISION DIGITAL TECHNOLOGY Co. LTD. (Hangzhou, China).

"Method, apparatus and device for coding and decoding" was invented by Yucheng Sun (Zhejiang, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides methods, apparatuses and devices for coding and decoding. When determining to enable a weighted prediction for a current block, the method includes: for the current block, obtaining a weighted prediction angle of the current block; for each pixel position of the current block, determining a surrounding matching position pointed by the pixel position from surrounding posit...