Global Patent Index - EP 1076902 A2

EP 1076902 A2 2001-02-21 - DIGITAL OPTICAL MEDIA AUTHENTICATION AND COPY PROTECTION METHOD

Title (en)

DIGITAL OPTICAL MEDIA AUTHENTICATION AND COPY PROTECTION METHOD

Title (de)

DIGITALE OPTISCHE MEDIA-AUTHENTIFIZIERUNG UDN KOPIESCHUTZVERFAHREN

Title (fr)

AUTHENTIFICATION DE SUPPORTS OPTIQUES NUMERIQUES ET PROTECTION CONTRE LES COPIES

Publication

EP 1076902 A2 (EN)

Application

EP 97933829 A

Priority

  • IL 9700266 W
  • US 68920996 A
  • US 3808097 P

Abstract (en)

[origin: WO9808180A2] Novel digital optical media has recorded thereon certain symbols belonging to two classes of non-standard codes in precise predetermined locations. One class provides symbols which, when read many times by a standard optical media reader, are decoded as valid but having variable values. A second class embodies codes which are immediately recognized by the player's decoder as invalid. The first class of non-standard codes can be read by a standard optical media reader but cannot be written or reproduced by standard optical media recorders and mastering equipment, and its presence on optical media thereby serves to identify the optical media as authentic, as opposed to an unauthorized copy, which will lack these special symbols. Symbols belonging to the second class of non-standard codes serve to protect the reading of symbols belonging to the first class from being altered or stabilized by the error-correcting system of the player. Patterns combining symbols of these two classes provide a non-copyable mark for automatically verifying the authenticity of optical media and protecting the data recorded thereon from being usable except when present on authentic media.

IPC 1-7 (main, further and additional classification)

G11B 17/22; A63H 3/33; G11B 5/09; G11B 15/52; G11B 20/10; G11B 20/12; G11B 27/22; H04N 5/76

IPC 8 full level (invention and additional information)

G06K 7/14 (2006.01); G06K 19/06 (2006.01); G11B 20/00 (2006.01); G11B 20/14 (2006.01); G11B 20/18 (2006.01); H03M 13/00 (2006.01); H03M 13/35 (2006.01)

CPC (invention and additional information)

G11B 20/00579 (2013.01); G06K 7/14 (2013.01); G06K 7/1465 (2013.01); G06K 19/06009 (2013.01); G11B 20/00086 (2013.01); G11B 20/00123 (2013.01); G11B 20/0021 (2013.01); G11B 20/00586 (2013.01); G11B 20/00927 (2013.01); G11B 20/1426 (2013.01); G11B 20/18 (2013.01); H03M 13/00 (2013.01); H03M 13/35 (2013.01); G11B 20/1833 (2013.01)

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB IE IT LI LU NL SE

EPO simple patent family

WO 9808180 A2 19980226; WO 9808180 A3 19980820; AU 3706197 A 19980306; EP 1076902 A2 20010221; EP 1076902 A4 20010523; IL 128369 D0 20000131

INPADOC legal status


2001-06-20 [18W] WITHDRAWN

- Ref Legal Event Code: 18W

- Date of withdrawal: 20010328

2001-05-23 [A4] SUPPLEMENTARY SEARCH REPORT

- Ref Legal Event Code: A4

- Effective date: 20010406

2001-05-23 [AK] DESIGNATED CONTRACTING STATES:

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- Designated State(s): AT BE CH DE DK ES FI FR GB IE IT LI LU NL SE

2001-05-16 [RIC1] CLASSIFICATION (CORRECTION)

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- Free Format Text: 7G 11B 20/00 A

2001-02-21 [17P] REQUEST FOR EXAMINATION FILED

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- Effective date: 19990813

2001-02-21 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH DE DK ES FI FR GB IE IT LI LU NL SE