ALEXANDRIA, Va., June 19 -- United States Patent no. 12,335,507, issued on June 17, was assigned to SIGMASTAR TECHNOLOGY LTD. (Fujian, China).

"Image encoding device and weighted prediction image encoding method" was invented by Shao-Bo Zhang (Shanghai), Cheng-Wei Zheng (Shanghai), Jian-Qiang Du (Shanghai) and Zhen-Bao Huang (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "A weighted prediction image encoding method includes: calculating a first feature value of a first frame, a second feature value of a second frame and a third feature value of a third frame; calculating a first offset value according to the first feature value and the second feature value, and calculating a second offset value acco...