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:
Sep. 07, 2010
Filed:
Feb. 28, 2006
Shogo Miyanabe, Tokorozawa, JP;
Hiroki Kuribayashi, Tokorozawa, JP;
Shogo Miyanabe, Tokorozawa, JP;
Hiroki Kuribayashi, Tokorozawa, JP;
Pioneer Corporation, Tokyo, JP;
Abstract
The present invention provides an information reproducing apparatus capable of preventing occurrence of erroneous detection as if a recording pit longer than the longest pit in the standard exists on an optical disk even in the case where the difference between frequency of a reproduction signal and frequency of a reproduction clock signal becomes large. When the difference between frequency of a detection signal Sp detected from an optical disk DK and frequency of a reproduction clock signal Scl becomes large, for example, the gain of a high frequency band corresponding to a recording pit length in the range of 2T to 4T is emphasized more than normal one by an equalizer, and the resultant is used for detecting a longest-pit-length error.