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:
Dec. 04, 2012
Filed:
May. 12, 2009
Koichiro Nishimura, Yokohama, JP;
Masaaki Kurebayashi, Ebina, JP;
Koichiro Nishimura, Yokohama, JP;
Masaaki Kurebayashi, Ebina, JP;
Hitachi Consumer Electronics Co., Ltd., Tokyo, JP;
Abstract
For a disc on which recording is to be performed at a plurality of recording densities, a technique for easily reading out disc management information without an error is disclosed. An optical disc () includes a plurality of data recording areas () for recording information at data recording densities different from each other. Information regarding the data recording densities of the data recording areas () is recorded in a management information recording area (BCA area () or PIC area ()) in a specific format that does not depend on the data recording densities of the data recording areas (). Each data recording area is divided to be arranged on the same surface of the disc, or is divided and arranged on a plurality of recording layers.