The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 25, 2015
Filed:
Sep. 21, 2012
Applicant:
Thomson Licensing, Issy de Moulineaux, FR;
Inventors:
John Matthew Town, Ojai, CA (US);
Holger Hofmann, Ingelheim, DE;
Alan Bruce Hamersley, Newbury Park, CA (US);
Assignee:
Thomson Licensing, Issy les Moulineaux, FR;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11B 19/04 (2006.01); G11B 20/18 (2006.01); G11B 20/12 (2006.01); G11B 20/00 (2006.01); G11B 7/007 (2006.01); G11B 7/26 (2006.01);
U.S. Cl.
CPC ...
G11B 20/12 (2013.01); G11B 7/00745 (2013.01); G11B 7/26 (2013.01); G11B 20/00123 (2013.01); G11B 20/00601 (2013.01); G11B 20/00268 (2013.01); G11B 20/00275 (2013.01); G11B 20/00876 (2013.01); G11B 2020/1285 (2013.01); G11B 2220/235 (2013.01); G11B 2220/2537 (2013.01); G11B 2220/63 (2013.01);
Abstract
A method and apparatus for disc authentication are disclosed. The authentication method includes measuring at least one physical property of a data disc, which includes at least one of an angle and an eccentricity parameter associated with two data layers of a data disc, and authenticating the disc by determining whether a match exists between the measured property and encoded information on data layer the data disc relating to the physical property.