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. 30, 2001
Filed:
Mar. 23, 1999
Applicant:
Inventors:
Junichi Kanenaga, Tanashi, JP;
Hiroyuki Onda, Higashikurume, JP;
Assignee:
Teac Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/00 ;
U.S. Cl.
CPC ...
G11B 7/00 ;
Abstract
An optical disk device has a unit for counting data read errors from an optical disk and a unit for reducing a playback speed of an optical disk. When a number of data read errors occurring in a predetermined period of time exceeds a predetermined value the playback speed reducing unit reduces the playback speed of the optical disk. As a result, repetition of error detection and consequent reduction in playback speed with each data read command when reading defective sectors of an optical disk can be prevented and the time required for error detection and speed reduction thereby eliminated, greatly improving overall average playback speed.