TW200617934A - Information carrier with copy protection, system for reading such an information carrier - Google Patents

Information carrier with copy protection, system for reading such an information carrier

Info

Publication number
TW200617934A
TW200617934A TW094125284A TW94125284A TW200617934A TW 200617934 A TW200617934 A TW 200617934A TW 094125284 A TW094125284 A TW 094125284A TW 94125284 A TW94125284 A TW 94125284A TW 200617934 A TW200617934 A TW 200617934A
Authority
TW
Taiwan
Prior art keywords
information carrier
reading
intended
copy protection
data
Prior art date
Application number
TW094125284A
Other languages
Chinese (zh)
Inventor
Robert Frans Maria Hendriks
Original Assignee
Koninkl Philips Electronics Nv
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koninkl Philips Electronics Nv filed Critical Koninkl Philips Electronics Nv
Publication of TW200617934A publication Critical patent/TW200617934A/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/28—Indicating or preventing prior or unauthorised use, e.g. cassettes with sealing or locking means, write-protect devices for discs
    • G11B23/281—Indicating or preventing prior or unauthorised use, e.g. cassettes with sealing or locking means, write-protect devices for discs by changing the physical properties of the record carrier
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00731—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/14—Heads, e.g. forming of the optical beam spot or modulation of the optical beam specially adapted to record on, or to reproduce from, more than one track simultaneously
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • G11B7/0053—Reproducing non-user data, e.g. wobbled address, prepits, BCA
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
    • G11B7/00736—Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

The invention relates to an information carrier (101) intended to store data, said information carrier comprising: - a data area (DA) intended to generate an output light beam representative of said data in response of an array of light spots, - a diffractive structure (DS) intended to generate at least one diffractive pattern representative of a cryptographic key in response of said array of light spots, said diffractive structure (DS) being placed beside said data area (DA) and at a different depth in said information carrier (101). The invention also relates to a system for reading such an information carrier (101).
TW094125284A 2004-07-29 2005-07-26 Information carrier with copy protection, system for reading such an information carrier TW200617934A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04300492 2004-07-29

Publications (1)

Publication Number Publication Date
TW200617934A true TW200617934A (en) 2006-06-01

Family

ID=35431296

Family Applications (1)

Application Number Title Priority Date Filing Date
TW094125284A TW200617934A (en) 2004-07-29 2005-07-26 Information carrier with copy protection, system for reading such an information carrier

Country Status (2)

Country Link
TW (1) TW200617934A (en)
WO (1) WO2006013528A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009013663A2 (en) 2007-07-20 2009-01-29 Koninklijke Philips Electronics N.V. Fiber-optic scanner

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3469650B2 (en) * 1994-09-13 2003-11-25 ソニー株式会社 Optical recording medium and signal recording method
ATE329352T1 (en) * 1998-08-10 2006-06-15 Ovd Kinegram Ag DIFFRACTION-OPTICAL SAFETY DEVICE ON COMPACT DISKS
AU2001284682A1 (en) * 2000-07-31 2002-02-13 Trid Store Ip, L.L.C. Method for data reading/writing using an optical carrier with pattern information pits
US6760512B2 (en) * 2001-06-08 2004-07-06 Hrl Laboratories, Llc Electro-optical programmable true-time delay generator
US20030235135A1 (en) * 2002-06-24 2003-12-25 Yin-Chun Huang Data reading apparatus and operating method thereof
WO2005048256A2 (en) * 2003-11-14 2005-05-26 Koninklijke Philips Electronics N.V. A data carrier having security mark and apparatus for handling such data carrier.

Also Published As

Publication number Publication date
WO2006013528A1 (en) 2006-02-09

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