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. 22, 2013
Filed:
Nov. 30, 2007
Applicants:
Harumitsu Miyashita, Nara, JP;
Yasumori Hino, Nara, JP;
Mamoru Shoji, Osaka, JP;
Kiyotaka Itou, Osaka, JP;
Inventors:
Harumitsu Miyashita, Nara, JP;
Yasumori Hino, Nara, JP;
Mamoru Shoji, Osaka, JP;
Kiyotaka Itou, Osaka, JP;
Assignee:
Panasonic Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/09 (2006.01); G11B 7/24 (2013.01); G11B 20/18 (2006.01); G11B 3/70 (2006.01); G11B 3/74 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical headreproduces information recorded on an optical disc, a BCA detectorand a medium discriminating circuitacquire waveform distortion information for specifying a waveform distortion of a reproduction signal reproduced by the optical head, and a variable waveform equalizerchanges a parameter used in a distortion reduction processing for reducing the waveform distortion of the reproduction signal based on the waveform distortion information.