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:
Aug. 21, 2012
Filed:
May. 18, 2010
Masaru Yamaoka, Osaka, JP;
Yuji Takagi, Osaka, JP;
Makoto Usui, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
Provided is an optical disk reproduction apparatus capable of preventing information that is different from the original sub information from being subjected to error correction erroneously, and of stably reproducing the sub information. The optical disk reproduction apparatus () has an optical head () for reading a reproduction signal including main information and sub information based on a recording mark formed on an optical disk (), a main information extraction unit () for extracting the main information from the reproduction signal, and a sub information extraction unit () for extracting the sub information from the reproduction signal. The sub information extraction unit () determines a reproduction accuracy of the sub information, and includes an error correction control unit () for deciding a timing of performing error correction of the sub information according to the determined reproduction accuracy, and an error correction unit () for performing the error correction of the sub information according to the timing decided with the error correction control unit ().