Watermarking enhanced to withstand anticipated corruptions
AssigneeDigimarc Corporation
InventorsGeoffrey B. Rhoads, J. Scott Carr
Life of this patent
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Abstract
An iterative encoding technique assesses trial watermark encoding of an object, and redresses any detected shortcomings in one or more successive re-encodings of the object. Other improvements concern web crawler-based watermark detectors, novel uses of meta-data in watermarks, applications of watermarks in merchandising, embedding of active computer code via watermarks, watermark-based asset management systems, watermark processing of computer system clock signals, and watermarks in labels and tags.
Claims20
A method of preparing watermarked entertainment content data for public distribution, comprising:
- compressing first data;
- decompressing the compressed data;
- assessing a result of said compression operation;
- and
- providing information obtained through said assessment to a watermarking process that is to watermark the entertainment content.
A method of enhancing robustness of a steganographically embedded signal to distortion, comprising preconditioning the signal by determining components thereof that are expected to survive said distortion, and removing other components.
In a method of steganographically encoding a content signal with an auxiliary signal, an improvement comprising preconditioning the auxiliary signal prior to said encoding so as to better withstand expected degradation of the encoded content signal, and thereafter encoding the content signal in accordance with the auxiliary signal.
Dependencies are inferred from the claim text.