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:
Nov. 19, 2002
Filed:
Dec. 22, 1999
Applicant:
Inventors:
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/09 ;
U.S. Cl.
CPC ...
G11B 5/09 ;
Abstract
A method for detecting a defective sector on a recording medium in a method for recording and/or reproducing data for the signal recording medium. A read gate is opened to reproduce data from a data field at a pre-set timing derived from a timing reference signal obtained on detecting a servo timing mark recorded in a servo field. If the timing reference signal has not been detected with success, the read gate is opened at a timing obtained based on a detection signal of a previously detected servo timing mark to reproduce the data from the data field. In detecting the defective sector, the state of deviation between the timing of opening the read gate and the data field is detected to detect the defective sector of the disc.