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:
Nov. 10, 2009
Filed:
Apr. 26, 2005
Methods and apparatus for enhancing the robustness of watermark extraction from digital host content
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 Corproation, San Diego, CA (US);
Abstract
Methods and apparatus for enhancing the robustness of watermark extraction from digital host content are provided. Embedded watermarks may be extracted from received digital host content in accordance with a stego key. A first watermark is extracted and a number of errors in the first extracted watermark is assessed. If the number of errors is above a first pre-determined value, at least a second watermark is extracted from the host content. A number of errors in at least the second extracted watermark is assessed. If the number of errors in at least the second extracted watermark is above a second pre-determined value, the extraction results for the extracted watermarks are combined in order to cumulatively assess the validity of the first extracted watermark and at least the second extracted watermark.