The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 15, 2025
Filed:
Jun. 01, 2023
Cisco Technology, Inc., San Jose, CA (US);
Mihailo Kolundzija, Lausanne, CH;
Raul Alejandro Casas, Doylestown, PA (US);
Hua Mu, Orlando, FL (US);
Marek Jacek Adamiec, Gdańsk, PL;
CISCO TECHNOLOGY, INC., San Jose, CA (US);
Abstract
A method is performed by an endpoint device that includes a loudspeaker, a microphone, and a controller. The method includes: by the loudspeaker, playing a loudspeaker signal into a space; by the microphone, detecting audio in the space, to produce a feedback audio signal; estimating acoustic parameters for the space including a reverberation time and an ambient noise power based on the feedback audio signal and the loudspeaker signal; receiving an incoming audio signal that is not detected by the microphone; using the acoustic parameters, generating an acoustic watermark signal that, when played into the space through the loudspeaker, would be inaudible to a listener; adding the acoustic watermark signal to the incoming audio signal to produce a watermarked audio signal; and playing the watermarked audio signal into the space through the loudspeaker.