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:
Dec. 25, 2012
Filed:
Sep. 28, 2011
Rade Petrovic, San Diego, CA (US);
Babak Tehranchi, San Diego, CA (US);
Joseph M. Winograd, San Diego, CA (US);
Kanaan Jemili, San Diego, CA (US);
Rade Petrovic, San Diego, CA (US);
Babak Tehranchi, San Diego, CA (US);
Joseph M. Winograd, San Diego, CA (US);
Kanaan Jemili, San Diego, CA (US);
Verance Corporation, San Diego, CA (US);
Abstract
Methods and apparatus for thwarting circumvention of watermark detection are provided. When content is received at a device that is equipped with a watermark extractor, an attacker may disguise the form of the received content in an attempt to circumvent detection of watermarks that are embedded in the content. A signal processing operation is performed on the received content such that the signal processing operation does not significantly degrade the perceptual quality of the content if the content is indeed in the form that is purported to be. The signal processing operation, however, significantly degrades the perceptual quality of the content if the content is in a different form, thereby discouraging the attacker's attempts to thwart watermark detection.