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:
Oct. 07, 2008
Filed:
Jul. 15, 2002
Masayoshi Ogura, Tokyo, JP;
Masayoshi Ogura, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A disc key detecting unitdetects a disc key on the basis of data which is supplied from an RF processor. If the disc key can be detected, a system controllercontrols an optical pickup or the like and reproduces data of a few sectors included in an audio block portion together with data in a TOC portion. On the basis of the disc key, a data decrypting unitdecrypts the data in the TOC portion which is supplied from a data demodulating unitand the data of a few sectors and supplies them to a data processing unit. The data processing unit supplies the data in the TOC portion and data in a header portion included in the sector to the system controller. A validity discriminating unitconfirms continuity of time data included in the header portion supplied from the data processing unit. If there is no continuity in the time data, a reproducing process or the like is suppressed.