ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,556,742, issued on Feb. 17, was assigned to Microsoft Technology Licensing LLC (Redmond, Wash.).

"Features of base color index map mode for video and image coding and decoding" was invented by Bin Li (Beijing), Feng Wu (Beijing) and Jizheng Xu (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "Innovations in the use of base color index map ("BCIM") mode during encoding and/or decoding simplify implementation by reducing the number of modifications made to support BCIM mode and/or improve coding efficiency of BCIM mode. For example, some of the innovations involve reuse of a syntax structure that is adapted for transform coefficients to instead sign...