Methods, devices and computer program products facilitate embedding and extraction of
watermarks into and from a host content. Embedded watermarks include an automatically …

(57) ABSTRACT A method for applying a digital watermark to a content signal is disclosed.
In accordance with such a method, a watermark ing key is identi? ed. The watermarking key …

Digital watermarks are embedded and decoded from host media signals like images and
audio using encryption keys. The encryption keys are used to encrypt different compo nents …

BACKGROUND 0003) A work of media is often distributed to consumers via fixed computer-
readable media, Such as a compact disc (CD-ROM), digital versatile disc (DVD), soft …

(*) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35
FOREIGN PATENT DOCUMENTS USC 154 (b) bydays.. days. EP O 766 468 A2 4/1997 (21) …

3,984,624 A 10/1976 Waggener 3,986,624 A 10/1976 Cates, Jr. et al. 4,038,596 A T. 1977
Lee 4,200,770 A 4, 1980 Hellman et al. 4,218,582 A 8, 1980 Hellman et al. 4,339,134 A 7 …

(57) ABSTRACT 5,418,602 A 5/1995 Nishikawa 5.530, 759 A 6/1996 Braudaway et al. A
Steganographic method embeds hidden information like 5,606,609 A 2/1997 Houser et al …

6,614,914 B1 9, 2003 Rhoads et al. 6,636,615 B1 10/2003 Rhoads et al. 6,694,041 B1
2/2004 Brunk 6,724.912 B1 4/2004 Carr et al. 6,748,533 B1 6, 2004 Wu et al. 6,754,377 B2 …

Over the last few years, there has been a growing demand for digital content. In
general,“digital content” is data that is perceived during display or playback (eg, a still …

The disclosure relates to processing content with watermarks to generate watermarked
versions. In some aspects, each version may be different. Groups of fragments may be …