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Graphics processing system employing embedded code signals

Patent 5768426 Issued on June 16, 1998. Estimated Expiration Date: Icon_subject June 16, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

3493674

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3585290

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Inventor

Assignee

Application

No. 327426 filed on 10/21/1994

US Classes:

382/232, IMAGE COMPRESSION OR CODING348/460, DIVERSE DEVICE CONTROLLED BY INFORMATION EMBEDDED IN VIDEO SIGNAL713/176Authentication by digital signature representation or digital watermark

Examiners

Primary: Boudreau, Leo H.
Assistant: Kelley, Chris

Attorney, Agent or Firm

Foreign Patent References

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  • 372 601 EP. 06/21/1990
  • 411 232 EP. 02/21/1991
  • 441 702 EP. 08/21/1991
  • 493 091 EP. 07/21/1992
  • 551 016 A1 EP. 07/21/1993
  • 581 317 A2 EP. 02/21/1994
  • 605 208 A2 EP. 07/21/1994
  • 629 972 EP. 12/21/1994
  • 650 146 A1 EP. 04/21/1995
  • 705 025 A2 EP. 04/21/1996
  • 3806411 DE. 09/21/1989
  • 4-248771 JP. 09/21/1992
  • 5-242217 JP. 09/21/1993
  • 2063018 GB. 05/21/1981
  • 2 067 871 GB. 07/21/1981
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  • WO 95/20291 WO. 07/21/1995
  • WO 9626494 WO. 08/21/1996
  • WO 9627259 WO. 09/21/1996

International Class

G06K 009/00

Abstract

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.

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