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:
Jan. 13, 2009
Filed:
Jul. 19, 2005
Akira Mashimo, Tokorozawa, JP;
Akira Mashimo, Tokorozawa, JP;
TEAC Corporation, Tama-shi, JP;
Abstract
An optical disk device which drives HD-DVD or the like. In an HD-DVD type optical disk, address information is embedded in four wobble waves having the same phase. A wobble signal is detected by an optical pickup and demodulated by an address decoding circuit. The address decoding circuit detects an amount of phase difference of the wobble signal. The system controller sets an error flag in a bit in which the detected amount of phase difference exceeds a predetermined range. When a reading error is determined by means of CRC or the like, bit data replacement is performed with regard to the bit in which an error flag has been set, thereby correcting the error.