ALEXANDRIA, Va., June 9 -- United States Patent no. 12,288,553, issued on April 29, was assigned to Cirrus Logic Inc. (Austin, Texas).
"Detection of replay attack" was invented by John Paul Lesso (Edinburgh, Great Britain), Cesar Alonso (Madrid) and Earl Corban Vickers (Seaside, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of detecting a replay attack comprises: receiving an audio signal representing speech; identifying speech content present in at least a portion of the audio signal; obtaining information about a frequency spectrum of each portion of the audio signal for which speech content is identified; and, for each portion of the audio signal for which speech content is identified: re...