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Device for optically scanning a record carrier 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G06K-009/00
  • H04L-009/00
출원번호 US-0082446 (1998-05-20)
우선권정보 EP-0201600 (1997-05-29); EP-0202276 (1997-07-21)
발명자 / 주소
  • Johan P. M. G. Linnartz NL
  • Maurice J. J. J-B. Maes NL
  • Antonius A. C. M. Kalker NL
  • Geert F. G. Depovere NL
  • Peter M. J. Rongen NL
  • Christianus W. F. Vriens NL
  • Marten E. Van Dijk NL
출원인 / 주소
  • Koninklijke Philips Electronics N.V. NL
대리인 / 주소
    Michael E. Belk
인용정보 피인용 횟수 : 51  인용 특허 : 6

초록

A watermark detector is disclosed to judge whether multimedia content can be copied or not. The watermark detector examines the multimedia content and outputs a signal indicating whether a watermark is present or not. A decision variable indicating to which extent the watermark is present is determi

대표청구항

1. A method of detecting a watermark embedded in an information signal, comprising the steps of:determining a decision variable indicating to which extent the watermark is present in the signal; and generating an output signal indicating detection of the watermark if the decision variable exceeds a

이 특허에 인용된 특허 (6)

  1. Linnartz Johan P. M. G.,NLX, Detecting a watermark embedded in an information signal.
  2. Houser Peter B. (Poway CA) Adler James M. (Ocean Beach CA), Electronic document verification system and method.
  3. Suzuki Yoshiyuki,JPX ; Funada Masahiro,JPX ; Outa Kenichi,JPX ; Kawase Michio,JPX, Image reading or processing with ability to prevent copying of certain originals.
  4. Linnartz Johan P. M. G.,NLX, Marking a digitally encoded video and/or audio signal.
  5. Rhoads Geoffrey B., Method and apparatus for robust information coding.
  6. Tewfik Ahmed H. ; Swanson Mitchell D. ; Zhu Bin, Method and apparatus for scene-based video watermarking.

이 특허를 인용한 특허 (51)

  1. Ogino, Akira; Kohashi, Takashi, Additional-information detection processing apparatus and method, content playback processing apparatus and method, and computer program.
  2. Stach, John, Arrangement of objects in images or graphics to convey a machine-readable signal.
  3. Stach, John, Arrangement of objects in images or graphics to convey a machine-readable signal.
  4. Petrovic, Rade; Tehranchi, Babak; Winograd, Joseph M.; Jemili, Kanaan, Asymmetric watermark embedding/extraction.
  5. Petrovic, Rade; Tehranchi, Babak; Winograd, Joseph M.; Jemili, Kanaan, Circumvention of watermark analysis in a host content.
  6. Petrovic, Rade; Tehranchi, Babak; Winograd, Joseph M.; Jemili, Kanaan, Circumvention of watermark analysis in a host content.
  7. Petrovic, Rade; Zhao, Jian; Winograd, Joseph M., Conditional access using embedded watermarks.
  8. Winograd, Joseph M.; Petrovic, Rade; Zhao, Jian, Content access management using extracted watermark information.
  9. Zhao, Jian; Winograd, Joseph M., Content management using multiple abstraction layers.
  10. Petrovic, Rade; Zhao, Jian; Winograd, Joseph M., Coordinated watermarking.
  11. Slepyan, Edward; Kugel, Alexander; Eisenberg, Julia, Currency verification.
  12. Stach, John, Data hiding in media.
  13. Stach,John, Data hiding through arrangement of objects.
  14. Wen, Xin; Honsinger, Chris W., Detecting embedded information in images.
  15. Rhoads, Geoffrey B.; Sharma, Ravi K., Digital watermark screening and detection strategies.
  16. Petrovic, Rade; Yang, Dai, Efficient and secure forensic marking in compressed.
  17. Petriovic, Rade; Yang, Dai, Efficient and secure forensic marking in compressed domain.
  18. Petrovic, Rade; Yang, Dai, Efficient and secure forensic marking in compressed domain.
  19. Petrovic, Rade; Atti, Venkatraman, Efficient extraction of embedded watermarks in the presence of host content distortions.
  20. Zhao, Jian, Enhanced content distribution using advertisements.
  21. Petrovic, Rade, Enhanced content management based on watermark extraction records.
  22. Petrovic, Rade; Atti, Venkatraman, Extraction of embedded watermarks from a host content based on extrapolation techniques.
  23. Petrovic, Rade; Atti, Venkatraman, Extraction of embedded watermarks from a host content using a plurality of tentative watermarks.
  24. Winograd, Joseph M., Forensic marking using a common customization function.
  25. Winograd, Joseph M., Forensic marking using a common customization function.
  26. Winograd, Joseph M.; Zhao, Jian; Petrovic, Rade, Interactive content acquisition using embedded codes.
  27. Petrovic, Rade; Tehranchi, Babak; Jemili, Kanaan; Winograd, Joseph M.; Angelico, Dean, Media monitoring, management and information system.
  28. Petrovic, Rade; Tehranchi, Babak; Jemili, Kanaan; Winograd, Joseph M.; Angelico, Dean, Media monitoring, management and information system.
  29. Petrovic, Rade; Tehranchi, Babak; Jemili, Kanaan; Winograd, Joseph M.; Angelico, Dean-Anthony, Media monitoring, management and information system.
  30. Honsinger, Chris W., Method for generating a dispersed message for data embedding.
  31. Petrovic, Rade; Tehranchi, Babak; Winograd, Joseph M.; Jemili, Kanaan, Methods and apparatus for enhancing the robustness of watermark extraction from digital host content.
  32. Petrovic, Rade; Tehranchi, Babak; Winograd, Joseph M.; Jemili, Kanaan, Methods and apparatus for enhancing the robustness of watermark extraction from digital host content.
  33. Petrovic, Rade; Tehranchi, Babak; Winograd, Joseph M.; Jemili, Kanaan, Methods and apparatus for thwarting watermark detection circumvention.
  34. Petrovic, Rade; Tehranchi, Babak; Winograd, Joseph M; Wong, Douglas, Pre-processed information embedding system.
  35. Wong, Douglas; Lee, Chong, Pre-processed information embedding system.
  36. Petrovic, Rade; Winograd, Joseph M., Remote control signaling using audio watermarks.
  37. Petrovic, Rade; Winograd, Joseph M., Remote control signaling using audio watermarks.
  38. Petrovic, Rade; Winograd, Joseph M., Remote control signaling using audio watermarks.
  39. Winograd, Joseph M.; Johnson, Peter Russell; Houle, William Carl, Second screen content.
  40. Winograd, Joseph M.; Petrovic, Rade; Zhao, Jian, Secure and efficient content screening in a networked environment.
  41. Tehranchi, Babak; Petrovic, Rade; Winograd, Joseph M.; Angelico, Dean Anthony, Signal continuity assessment using embedded watermarks.
  42. Winograd, Joseph M., Social media viewing system.
  43. Petrovic, Rade; Tehranchi, Babak; Winograd, Joseph, System reactions to the detection of embedded watermarks in a digital host content.
  44. Petrovic, Rade; Tehranchi, Babak; Winograd, Joseph M., System reactions to the detection of embedded watermarks in a digital host content.
  45. Petrovic,Rade; Tehranchi,Babak; Winograd,Joseph M., System reactions to the detection of embedded watermarks in a digital host content.
  46. Petrovic, Rade; Downes, Patrick George, Time varying evaluation of multimedia content.
  47. Zhao, Jian; Mercier, Guillaume, Transactional video marking system.
  48. Winograd, Joseph M.; Petrovic, Rade; Zhao, Jian, Watermark extraction and content screening in a networked environment.
  49. Petrovic, Rade; Atti, Venkatraman, Watermark extraction based on tentative watermarks.
  50. Petrovic, Rade; Winograd, Joseph M.; Downes, Patrick George, Watermark extractor enhancements based on payload ranking.
  51. Tehranchi, Babak; Petrovic, Rade, Watermarking in an encrypted domain.
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