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:
Feb. 24, 1998
Filed:
Nov. 13, 1996
Applicant:
Inventor:
Shinichi Ohta, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369 59 ; 369 58 ;
Abstract
A recorded signal detection apparatus detects information recorded on an information recording medium in the form of a digital signal so as to prevent a detection error caused by defects without lowering the detection sensitivity to information pits. In the recorded signal detection apparatus, any change in a binary signal reproduced from the recording medium is detected, and when the binary signal changes a plurality of number of times within a predetermined period of time, a detection signal of a recorded information signal is output.