A watermark can be viewed as an information Signal that is embedded in a host Signal,
Such as an image, audio, or Some other media content. Watermarking Systems based on …

6,353,672 B1 3, 2002 Rhoads 6.829, 368 B2 12/2004 Meyer et al. 6,363,159 B1 3, 2002
Rhoads 6,850,626 B2 2/2005 Rhoads et al. 6,381,341 B1 4/2002 Rhoads 6,879,701 B1 …

4.252. 995 4,262,329 4,296,326 4,297.729 4,313,197 4,367.488 4,379,947 4,380,027
4,389,671 4,395,600 4,416,001 4,423,415 4.425, 642 4,476,468 4,523,508 4,528,588 …

The disclosure describes systems for creating and authenti cating printed objects using
authentication and copy detec tion Watermarks. For example, one veri? cation system …

The following sections describe applications for integrat ing watermarks in multimedia data.
In general, these appli cations exploit some level of interaction between watermarks and/or …

The present disclosure relates generally to identification documents and related methods
and apparatus. One claim recites a method to determine whether to authenticate an …

(57) ABSTRACT A method and system for monitoring and analyzing at least one signal are
disclosed. An abstract of at least one reference signal is generated and stored in a reference …

The following detailed description is grouped into four main sections. The grouping is not
meant to limit the scope of the present invention, and is merely provided for the readers …

(57) ABSTRACT A method and system for monitoring and analyzing at least one signal are
disclosed. An abstract of at least one reference signal is generated and stored in a reference …

By printing documents and other objects With machine readable indicia, such as
steganographic digital Watermarks or barcodes, a great variety of document management …