US 5,832,119 · Granted 1998-11-03
Methods for controlling systems using control signals embedded in empirical data
An embedded multi-bit signal is steganographically detected from empirical data, such as image or audio data, and some aspect of a related system's operation is controlled in accordance therewith. One application of the invention is a video playback or recording device that is controlled in accordance with the embedded multi-bit signal to limit playback or recording operations. Another is a photo-duplication kiosk that recognizes certain steganographic markings in an image being copied and interrupts the copying operation.
Patent details
- Publication number
- US 5,832,119
- Filing date
- 1995-09-25
- Grant date
- 1998-11-03
- Assignee
- Digimarc Corporation
- Inventor(s)
- RHOADS; GEOFFREY B.
- CPC class
- G06K7/1447
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