ALEXANDRIA, Va., June 12 -- United States Patent no. 12,301,820, issued on May 13, was assigned to BEIJING XIAOMI MOBILE SOFTWARE Co. LTD. (Beijing).

"Transform-based image coding method and device therefor" was invented by Moonmo Koo (Seoul, South Korea), Jaehyun Lim (Seoul, South Korea), Junghak Nam (Seoul, South Korea) and Seunghwan Kim (Seoul, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "An image decoding method, according to the present document, may comprise the steps of: deriving transform coefficients for a current block on the basis of residual information; determining whether a significant coefficient is present in a second region excluding a first region in the top-left end of the cu...