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:
Dec. 30, 2014
Filed:
Oct. 09, 2013
Panasonic Corporation, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A ratio Xm of an information item recorded on an adjacent track relative to an information item recorded on a main track included in a first signal obtained from a first light flux having passed through a center region () is different from ratios Xs1 and Xs2 of the information items recorded on the adjacent track relative to the information items recorded on the main track included in second and third signals obtained from second and third light fluxes having passed through first and second end regions (), and a ratio of respective gains of a first waveform equalizer (), a second waveform equalizer (), and a third waveform equalizer () is determined so as to cancel the information item recorded on the adjacent track in each of frequency components of the first signal, the second signal, and the third signal.