Embedding auxiliary signals with multiple components into media signals
AssigneeDigimarc Corporation
InventorGeoffrey B. Rhoads
Life of this patent
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Abstract
A digital watermark system embeds auxiliary signals in multimedia types, including audio, still and moving images, and physical objects. These auxiliary signals, referred to as digital watermarks, include multiple components that can perform differing functions and that are embedded with different levels of redundancy, potentially within different transform domains of the host signal.
Claims48
A watermark embedded in an electronic or physical media, the watermark carrying a machine readable variable message that is embedded in the media by modifying an electronic media signal to hide the machine readable variable message in the electronic media signal before storing the modified electronic media signal on the media, the watermark comprising two or more components, at least one of the components being encoded more redundantly than another component.
A watermark embedded in an electronic or physical media, the watermark carrying a machine readable variable message that is embedded in the media by modifying an electronic media signal to hide the machine readable variable message in the electronic media signal before storing the modified electronic media signal on the media, the watermark comprising two or more signal components, the signal components being encoded such that each component has a different signal strength.
A method for embedding a digital watermark in an electronic or physical media, the digital watermark carrying a machine readable variable message that is embedded in the media by modifying an electronic media signal to hide the machine readable variable message in the electronic media signal before storing the modified electronic media signal on the media, the method comprising:
- providing two or more components of the digital watermark;
- and
- encoding the two or more components into the media, at least one of the components being encoded more redundantly than another component.
A method of watermark embedding in an electronic or physical media, the watermark carrying a machine readable variable message that is embedded in the media by modifying an electronic media signal to hide the machine readable variable message in the electronic media signal before storing the modified electronic media signal on the media, the method comprising:
- providing two or more signal components of the watermark;
- and
- encoding the signal components into the media such that each component has a different signal strength.
A method for embedding a dinital watermark in an electronic or physical media, the digital watermark carrying machine readable data that is embedded in the media by modifying an electronic media content signal to hide the machine readable datas in the electronic media content signal, and then storing the modified electronic media content signal on the media, the method comprising:
- modifying a version of the electronic media content signal to steganographically encode first machine readable data therein;
- and
- modifying a version of the electronic media content signal to steganographically encode second machine readable data therein, said second machine readable data being different than the first machine readable data;
- wherein the modified electronic media content signal stored on the media conveys both the first and second machine readable data.
Dependencies are inferred from the claim text.