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:
Jul. 25, 1995
Filed:
Aug. 10, 1994
Seiichiro Satomura, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A method and apparatus for detecting pulse signals corresponding to marks from a recording medium on which the marks are periodically recorded. The recording medium is scanned with a reproducing transducer and a reproduction signal (including the pulse signals) is read out. A gate signal with a predetermined width is generated on the basis of the pulse signal which has been detected at k period before the pulse signal to be detected, where k is an integer more than 1. If the pulse signal before k period is missing, the gate signal with a predetermined width is generated on the basis of the pulse signal which has been detected at k+1 period before. Only the pulse signal existing within the period during which the gate signal is output is extracted from the reproduction signal.