Methods for controlling systems using control signals embedded in empirical data
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United States of America Patent
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Nov 3, 1998
Issued Date -
N/A
app pub date -
Sep 25, 1995
filing date -
Nov 18, 1993
priority date (Note) -
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Abstract
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.
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