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. 19, 2010
Filed:
Sep. 17, 2008
Hideki Sawaguchi, Kokubunji, JP;
Yasutaka Nishida, Kodaira, JP;
Hisashi Takano, Kodaira, JP;
Hiroyuki Tsuchinaga, Kodaira, JP;
Hideki Sawaguchi, Kokubunji, JP;
Yasutaka Nishida, Kodaira, JP;
Hisashi Takano, Kodaira, JP;
Hiroyuki Tsuchinaga, Kodaira, JP;
Hitachi Global Storage Technologies Japan, Ltd., Kanagawa-ken, JP;
Abstract
To effectively suppress a signal in a low frequency region in which the medium noise and the signal distortion are concentrated, and in order to effectively utilize a detected component of the reproduced signal in the low frequency region, a target of partial response equalization to the perpendicularly recorded/reproduced signal is set so that the low-frequency component around the direct current is suppressed to a regulated quantity for both the effective suppression and the effective utilization. Accordingly, a maximum-likelihood decoding process is carried out through the target of partial response equalization. Reliability of data detection is made higher and a signal-to-noise ratio is improved, so that the noise from the recording medium can be reduced more and it is possible to provide a high-density magnetic recording/reproducing apparatus.