ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,706,104, issued on Aug. 11, was assigned to Microsoft Technology Licensing LLC (Redmond, Wash.).
"Robust authentication of digital audio" was invented by Yang Cui (Beijing), Ke Wang (Beijing), Lei He (Beijing) and Frank Kao-Ping Soong (Beijing).
According to the abstract* released by the U.S. Patent & Trademark Office: "Solutions for authenticating digital audio include: generating a first band-limited watermark using a first key, generating a second band-limited watermark using a second key, wherein the bandwidth of the second watermark does not overlap with the bandwidth of the first watermark; and embedding the first watermark and the second watermark into a segment of the digital...