ALEXANDRIA, Va., May 19 -- United States Patent no. 12,633,294, issued on May 19, was assigned to Dolby Laboratories Licensing Corp. (San Francisco).

"Matrix coded stereo signal with periphonic elements" was invented by David S. McGrath (Rose Bay, Australia) and Hao Luo (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "Embodiments are disclosed for a matrix coded stereo signal with periphonic elements. A mixing matrix, suitable for processing a multi-channel audio input signal, is constructed so that the resulting multi-channel output signal contains the same audio elements from the input signal, wherein the spatial relationships between audio elements, as defined by panning rules associated with the i...