05832119 is referenced by 455 patents and cites 249 patents.

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.

Title
Methods for controlling systems using control signals embedded in empirical data
Application Number
154866
Publication Number
5832119
Application Date
September 25, 1995
Publication Date
November 3, 1998
Inventor
Geoffrey B Rhoads
West Linn
OR, US
Agent
Klarquist Sparkman Campbell Leigh & Whinston
Assignee
Digimarc Corporation
OR, US
IPC
G06K 9/00
View Original Source