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. 30, 2019
Filed:
Sep. 16, 2016
Applicant:
Oracle International Corporation, Redwood City, CA (US);
Inventor:
Faramarz Mahnad, Brookline, MA (US);
Assignee:
Oracle International Corporation, Redwood Shores, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/005 (2006.01); G11B 20/10 (2006.01); G11B 7/007 (2006.01); G11B 7/003 (2006.01);
U.S. Cl.
CPC ...
G11B 20/10046 (2013.01); G11B 7/0053 (2013.01); G11B 7/003 (2013.01); G11B 7/00718 (2013.01);
Abstract
Amplitude or phase modulated uncompensated wobble patterns representing address patterns for track addresses of optical media are generated or applied to the media. A filter is applied to the un-compensated wobble patterns to detect a threshold value to signal the existence of a synchronization pattern. A pair of filters can be used to detect the threshold and a zero-crossing. This methodology can detect the existence and timing of the wobble pattern. This can eliminate the need for a timing recovery subfield in the wobble pattern of the prior art.