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. 22, 2009
Filed:
May. 20, 2008
Tomoaki Okumura, Osaka, JP;
Tsuyoshi Hiraki, Osaka, JP;
Kouichi Komawaki, Kyoto, JP;
Kiyotaka Tanaka, Osaka, JP;
Kazumasa Tarutani, Osaka, JP;
Tomoaki Okumura, Osaka, JP;
Tsuyoshi Hiraki, Osaka, JP;
Kouichi Komawaki, Kyoto, JP;
Kiyotaka Tanaka, Osaka, JP;
Kazumasa Tarutani, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An information recording system for recording information on an optical disc using a reference clock signal generated based on a push-pull signal including a wobble frequency component, the system includes an amplitude obtaining unit for obtaining an amplitude value of the push-pull signal, a threshold calculation unit for calculating a displacement threshold of the push-pull signal based on the amplitude value obtained by the amplitude obtaining unit, and a noise reduction unit for generating a corrected push-pull signal by correcting the push-pull signal such that a displacement exceeding the displacement threshold is reduced. The reference clock signal is generated based on the corrected push-pull signal generated by the noise reduction unit.