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:
Jun. 21, 2011
Filed:
Jul. 31, 2008
Shoei Kobayashi, Kanagawa, JP;
Nobuyoshi Kobayashi, Kanagawa, JP;
Tamotsu Yamagami, Kanagawa, JP;
Shinichiro Iimura, Tokyo, JP;
Shoei Kobayashi, Kanagawa, JP;
Nobuyoshi Kobayashi, Kanagawa, JP;
Tamotsu Yamagami, Kanagawa, JP;
Shinichiro Iimura, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
In step S, the address generator generates address information composed of a sync signal which is recorded on an optical disc, address data and an error correction code for the address data, pre-encodes and supplies it to a modulator. At the same time, a carrier signal generator generates a carrier signal which is to carry the address information, and supplies it to the modulator. In step S, the modulator makes MSK modulation of the carrier signal supplied from the carrier signal generator on the basis of the pre-encoded address information supplied from the address generator, and supplies a resultant MSK modulation signal to a wobbling unit. In step S, the wobbling unit forms, on the optical disc, a spiral groove wobbled adaptively to the MSK modulation signal supplied from the modulator. In this optical disc, a given address can be accessed quickly and accurately.