ALEXANDRIA, Va., June 19 -- United States Patent no. 12,334,099, issued on June 17, was assigned to Harman International Industries Inc. (Stamford, Conn.).

"Efficient blind source separation using topological approach" was invented by Liangfu Chen (Shanghai), Zhilei Liu (Shanghai), Guoxia Zhang (Shanghai) and Min Xu (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "Aspects disclosed herein generally related to a method and system for efficient blind source separation using a topological approach. The method and system comprise locating and separating the audio streams by constructing and simplifying contour tree in a built time-frequency smooth weighted histogram in the subsystems included. Thus, in o...