Watermarking of digital image data

Details Watermarking of digital image data Watermarking of digital image data

2006-12-26

2006-12-26

Yenke, Brian P. (Department: 2622)

Television

Image signal processing circuitry specific to television

Special effects

C380S054000, C713S176000, C283S113000, C382S100000, C348S584000, C348S589000, C348S600000

Reexamination Certificate

active

07154560

ABSTRACT:
Digital watermarks can serve to indicate copyright ownership of digitized video. When video images are transmitted as transformed by discrete cosine transformation (DCT) for compression, with or without motion compensation, it is advantageous to include a watermark after transformation. To this end, a DCT watermark is generated for optimal visibility based on the original image data, and the generated watermark is superposed on the transformed data.

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