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:
Mar. 12, 1996
Filed:
Dec. 09, 1993
Applicant:
Inventors:
Shinichi Ohta, Tokyo, JP;
Hiroto Kitai, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; H04N / ;
U.S. Cl.
CPC ...
369 59 ; 360 32 ;
Abstract
In an optical information reproduction apparatus, digital information recorded as an optical mark on an optical information recording medium is reproduced in the following manner. A light beam is applied to the recording medium, and the obtained reproduction signal is binarized. The binary reproduction signal is sampled by a sampling clock which is generated by a PLL control signal generator, and is synchronized with the binary reproduction signal so as to reproduce the digital information. The PLL control signal generator achieves synchronization based on the leading and trailing edges of a change point of the binary reproduction signal.