ALEXANDRIA, Va., March 12 -- United States Patent no. 12,249,344, issued on March 11, was assigned to Amazon Technologies Inc. (Seattle).
"Extended audio watermarks" was invented by Christopher Evans (Somerville, Mass.), Sumit Garg (Acton, Mass.), Ameya Agaskar (Bedford, Mass.), Mohammad Edris Qarghah (Boxborough, Mass.) and Zhengping Jin (Waltham, Mass.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Described herein is a system for encoding audio watermarks with frequency extensions to enable enhanced watermark detection. An extended audio watermark may include an existing audio watermark and a duplicate audio watermark, enabling backwards compatibility with existing watermark detection while also enabling ...