4,200,770 A 4, 1980 Hellman et al. 4,218,582 A 8, 1980 Hellman et al. 4.405, 829 A 9, 1983
Rivest et al. 4,424.414 A 1, 1984 Hellman et al. 4,827,508 A 5, 1989 Shear 4,977,594 A 12 …

US9093064B2 - Down-mixing compensation for audio watermarking - Google Patents
US9093064B2 - Down-mixing compensation for audio watermarking - Google Patents Down-mixing …

The present invention relate generally to digital watermark ing spot colors. A process color
approximation can be used for a spot color, and chrominance watermarking can be …

(57) ABSTRACT A watermark is embedded in a document having a plurality of pages. The
pages of the document are analyzed to produce watermark information, which indicates …

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

An implementation of a technology, described herein, for facilitating watermarking of digital
goods. At least one implementation, described herein, performs quantization watermarking …

10 Exemplary embodiments of the present invention overcome the above disadvantages
and other disadvantages not described above. Also, the present invention is not required to …

Watermarks and related machine-readable coding tech niques are used to embed data
within the information content on object surfaces. These techniques may be used as a …

4,225,967 4,230,990 4,281.217 4,295,128 4.425, 578 4454, 610 4,464,656 4497, 060
4,512,013 4,547,804 4,564,862 4,593.904 4,639,779 4,669,089 4,677.466 4,686,707 …

(51) Int. Cl A watermark is encoded redundantly so as to provide Gook o/00(2006.01)
effective copy protection. To assure a reliable detection of 52) US C 382/100 the watermark …