ALEXANDRIA, Va., July 15 -- United States Patent no. 12,666,009, issued on June 23, was assigned to Tencent America LLC (Palo Alto, Calif.).

"Sub-block based constraint on bi-prediction for out-of-boundary conditions" was invented by Guichun Li (San Jose, Calif.), Xiang Li (Saratoga, Calif.), Lien-Fei Chen (Hsinchu, Taiwan) and Shan Liu (San Jose, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "In a method of decoding performed in a decoder, a syntax element indicating a prediction mode associated with a current block in a current picture is received, the prediction mode being one of a uni-prediction mode and a bi-prediction mode. When the bi-prediction mode is applied to a first subblock of a pluralit...