ALEXANDRIA, Va., July 9 -- United States Patent no. 12,355,998, issued on July 8, was assigned to TENCENT AMERICA LLC (Palo Alto, Calif.).

"Method for layerwise random access in a coded video stream" was invented by Byeongdoo Choi (Palo Alto, Calif.), Shan Liu (San Jose, Calif.) and Stephan Wenger (Hillsborough, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of generating an encoded video bitstream, including obtaining an IRAP AU from a video bitstream; determining whether the IRAP AU is a first AU in a decoding order, whether each picture is an IDR picture, or whether each picture is a first picture of a layer following an EOS NAL unit; if so, setting a first flag for the IRAP AU equal to on...