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:
Apr. 22, 2003
Filed:
Feb. 26, 1999
Hiroshi Nishiwaki, Tsurugashima, JP;
Hideki Hayashi, Tsurugashima, JP;
Pioneer Electric Corporation, Tokyo-To, JP;
Abstract
An information reproducing apparatus includes: a light emitting device that emits a light beam to the recording medium; a detecting device that detects the light beam reflected by the recording medium, and that generates a detection signal including a first component and a second component which have different middle levels; a sampling device that samples the first component and the second component included in the generated detection signal; an extraction device that extracts a first sampling value closest to the middle level of the first component from the first component, and that extracts a second sampling value closest to the middle level of the second component from the second component; a signal generation device that generates a first middle level signal by using the extracted first sampling value, and that generates a second middle level signal by using the extracted second sampling value; a compensation device that shifts the first component and the second component such that both the first middle level signal and the second middle level signal are matched to a predetermined level; and a decoding device that decodes the compensated first component and the compensated second component to reproduce the information.