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:
Mar. 13, 2007
Filed:
Mar. 11, 2005
Steven Jeffrey Goldberg, Downingtown, PA (US);
Richard Dan Herschaft, Whitestone, NY (US);
Alain Charles Louis Briancon, Poolesville, MD (US);
Prabhakar R. Chitrapu, Blue Bell, PA (US);
Alan Gerald Carlton, Mineola, NY (US);
Steven Jeffrey Goldberg, Downingtown, PA (US);
Richard Dan Herschaft, Whitestone, NY (US);
Alain Charles Louis Briancon, Poolesville, MD (US);
Prabhakar R. Chitrapu, Blue Bell, PA (US);
Alan Gerald Carlton, Mineola, NY (US);
InterDigital Technology Corporation, Wilmington, DE (US);
Abstract
Signals encoded with watermark information are generated and broadcast into a protected area for capture by illicit recording devices along with their intended targets. An illicit recording in which at least a portion of the broadcast watermark signals are recorded is obtained and correlated with a known position of the broadcast watermark signals to yield the location of illicit recording devices. In an alternate embodiment, a surveillance device, being image and time synchronized with a signal broadcasting device, monitors and records the protected area. Illicit recordings containing the broadcast watermark are obtained and correlated with corresponding recordings taken by the surveillance device to identify the location of illicit recording devices. In an alternate embodiment, the surveillance device further monitors the quality of the broadcast watermark signals and adjusts them accordingly to achieve a desired quality level.