05768426 is referenced by 483 patents and cites 198 patents.

An identification code signal is impressed on a carrier to be identified (such as an electronic data signal or a physical medium) in a manner that permits the identification signal later to be discerned and the carrier thereby identified. The method and apparatus are characterized by robustness despite degradation of the encoded carrier, and by holographic permeation of the identification signal throughout the carrier. An exemplary embodiment is a processor that embeds the identification signal onto a carrier signal in real time.

Title
Graphics processing system employing embedded code signals
Application Number
154866
Publication Number
5768426
Application Date
October 21, 1994
Publication Date
June 16, 1998
Inventor
Geoffrey B Rhoads
West Linn
OR, US
Agent
Klarquist Sparkman Campbell Leigh & Whinston
Assignee
Digimarc Corporation
OR, US
IPC
G06K 9/00
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