ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,542,148, issued on Feb. 3, was assigned to Lemon Inc. (Grand Cayman, Cayman Islands).

"Systems and methods for audio source separation using band-split transformers" was invented by Wei Tsung Lu (Los Angeles) and Ju-Chiang Wang (Los Angeles).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure describes techniques for implementing improved audio source separation. A complex spectrum X is split into a plurality of K bands along a frequency axis by applying band-split operations on the complex spectrum X. The complex spectrum is a time-frequency representation of audio signals. Each of the plurality of K bands is denoted as Xk, k=1.., K. Ea...