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:
Jan. 06, 2004
Filed:
Dec. 21, 2000
Applicant:
Inventor:
Kaneyasu Shimoda, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/09 ;
U.S. Cl.
CPC ...
G11B 5/09 ;
Abstract
This invention provides a demodulation method and a demodulator for demodulating by converting analog signal obtained by reading information stored in a recording medium to digital signal so as to generate data representing that information. Consequently, correct data is obtained from signal having low S/N ratio. Over-sampling is carried out by an A/D converter A and a digital signal synchronous with a proper clock is reproduced by interpolation computation, maximum likelihood is detected and RLL decoded. Then, error is corrected by an error correction code.