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. 05, 2003
Filed:
Apr. 29, 2002
Yoshihiro Tosaki, Osaka, JP;
Masaru Odagiri, Hyogo, JP;
Hiromichi Shimada, Hyogo, JP;
Shinichi Tanaka, Kyoto, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A DVD-R has a main information area where data information is recorded in a track having a wobble, and first and second control data areas each of which is disposed in an inner space closer to the disk center than the main information area . The information structure and physical structure of the first control area are different from those of the second control area . In the second control area , predetermined physical format information and disk production information, for example, the last address of when data is written in the DVD-R , the maximum transfer rate or the like, are recorded. Thus, when the DVD-R is reproduced by a DVD player etc., the physical format Information and disk production information etc. recorded in the second control data area are read. Thereby, the disk can be precisely identified without spoiling the physical format information, the disk production information or the like, and further illegal use of the DVD or another optical disk leading up to breach of the copyright can be effectively prevented.