(57) ABSTRACT methods of embedding and detecting a watermark in an information signal
(X (n), y'(n)) which are robust against sampling rate conversions of the watermarked signal …

US6785815B1 - Methods and systems for encoding and protecting data using digital signature
and watermarking techniques - Google Patents US6785815B1 - Methods and systems for …

Related US Application Data continuation-in-part of application No. 10/818,938, filed on Apr.
5, 2004, now Pat. No. 6,996,252, which is a continuation of application No. 09/945,243, filed …

3,735,048 A 5/1973 Tomsa et a1............ 179/15 BM 3,760,275 A 9/1973 OhSaWa et 31---------
-------325/31 The present invention relates to digital Watermarking and 3,885,217 A 5/1975 …

(65) Prior Publication Data OTHER PUBLICATIONS US 2003/0053654 A1 Mar. 20, 2003
Caldelli et al.," Geometric-Invariant Robust Watermarking through Constellation Matching in …

(57) ABSTRACT Related US Application Data (60) Provisional application No. 60/311,160,
filed on Aug. A marking system that includes forming at least one marking 9, 2001 isional …

The present invention provides a method of Securing mes Sages Steganographically
embedded in media (eg, printed or electronic objects, audio and video). In one implementa …

The present invention relates to coordinating information carried by a digital watermark and
other machine-readable codes. In one implementation, an identification card includes a …

(57) ABSTRACT A method (750) of encoding a value is disclosed. In one implementation the
value is encoded into an image (700). The method (750) operates by defining (403) a first …

Correspondence Address:(57) ABSTRACT Steven W Stewart A system (40) responsive to
watermarked documents for Digimarc Corporation exchanging data. The system (40) …