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:
Oct. 30, 2007
Filed:
Sep. 05, 2003
Bin Yin, Eindhoven, NL;
Cornelis Marinus Schep, Eindhoven, NL;
Aalbert Stek, Eindhoven, NL;
Alexander Padiy, Eindhoven, NL;
Theodorus Petrus Henricus Gerardus Jansen, Eindhoven, NL;
Mohammed Meftah, Eindhoven, NL;
Bin Yin, Eindhoven, NL;
Cornelis Marinus Schep, Eindhoven, NL;
Aalbert Stek, Eindhoven, NL;
Alexander Padiy, Eindhoven, NL;
Theodorus Petrus Henricus Gerardus Jansen, Eindhoven, NL;
Mohammed Meftah, Eindhoven, NL;
Koninklijke Philips Electronics N. V., Eindhoven, NL;
Abstract
A wobble signal is generated from at least two elementary signals (A,B,C,D) detected by scanning a wobbled track of a data carrier. The invention proposes a solution for eliminating the noise of various origins in the wobble signal, notably the high frequency data leakage into the wobble signal due to radial asymmetry introduced in the diffraction pattern on the detector, whatever the reason for this radial asymmetry. According to the invention, the at least two elementary signals are filtered with at least an adaptive filter (), and said filtered elementary signals are subtracted () from said wobble signal (PP) thereby generating an improved wobble signal.