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:
Jan. 13, 2009
Filed:
Jan. 21, 2003
Jaap Andre Haitsma, Eindhoven, NL;
Antonius Adrianus Cornelis Maria Kalker, Eindhoven, NL;
Steven Marco Schimmel, Eindhoven, NL;
Jaap Andre Haitsma, Eindhoven, NL;
Antonius Adrianus Cornelis Maria Kalker, Eindhoven, NL;
Steven Marco Schimmel, Eindhoven, NL;
Gracenote, Inc., Emeryville, CA (US);
Abstract
A robust fingerprinting system is disclosed. Such a system can recognize unknown multimedia content (U(t)) by extracting a fingerprint (a series of hash words) from said content, and searching a resembling fingerprint in a database in which fingerprints of a plurality of known contents (K(t)) are stored. In order to more efficiently store the fingerprints in the database and to speed up the search, the hash words (H(n)) of known signals (K(t)) are sub-sampled () by a factor M prior to storage in the database (). The hash words (H(n)) of unknown signals (U(t)) are divided () into M interleaved sub-series (H(n) . . . HM−1(n)). The interleaved sub-series are selectively () applied to the database () under the control of a computer (). If only one of the sub-series sufficiently matches a stored fingerprint, the signal is identified.