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:
Oct. 03, 2000
Filed:
Dec. 18, 1998
Matthew L Miller, Princeton, NJ (US);
Signafy, Inc., Princeton, NJ (US);
Abstract
A method for inserting a watermark signal into data to be watermarked. The method includes the steps of: applying a partial watermark extraction to unwatermarked data for generating a first set of intermediate extracted values; identifying a first set of target values that are to replace the intermediate extracted values; computing the difference between the first set of target values and the first set of intermediate extracted values; and adding the computed difference throughout the unwatermarked data. In a preferred embodiment of the method of the present invention, the step of identifying a first set of target values that are to replace the intermediate extracted values further includes the substeps of: applying a transform to the first set of intermediate extracted values; applying a further partial watermark extraction to the transformed first set of intermediate extracted values to obtain a second set of intermediate extracted values; identifying a second set of target values that are to replace the second set of intermediate extracted values; computing the difference between the second set of target values and the second set of intermediate extracted values; adding the computed difference throughout the transformed first set of intermediate extracted values to obtain a transformed first set of target values; and applying an inverse transform to the first set of transformed target values to obtain the first set of target values.