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:
Sep. 19, 2006
Filed:
Aug. 06, 2002
Applicants:
Szeming Cheng, College Station, TX (US);
Hong Heather Yu, Princeton Junction, NJ (US);
Inventors:
Szeming Cheng, College Station, TX (US);
Hong Heather Yu, Princeton Junction, NJ (US);
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/09 (2006.01); G06K 9/36 (2006.01);
U.S. Cl.
CPC ...
Abstract
An apparatus for generating a fingerprint of a digital medium having a partial decoder for generating a partially decoded form of a compressed datastream, feature extractor for extracting at least one invariant feature from the partially decoded form, a fingerprint calculator for computing at least one fingerprint from the extracted invariant feature. An apparatus for authenticating fingerprints and methods for generating and authenticating fingerprints.