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. 23, 2013
Filed:
Jun. 08, 2010
Masaya Yamamoto, Osaka, JP;
Toshihisa Nakano, Osaka, JP;
Ryuichi Okamoto, Osaka, JP;
Motoji Ohmori, Osaka, JP;
Masaya Yamamoto, Osaka, JP;
Toshihisa Nakano, Osaka, JP;
Ryuichi Okamoto, Osaka, JP;
Motoji Ohmori, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
To provide a content playback device that can use content appropriately by avoiding output of content not permitted to be used according to contract information. A playback control unitextracts a content name from playback control information in a playback path information table, and inquires of a rights management unitwhether content identified by the extracted content name is playable or not. If the content is judged as being unplayable, the playback control unitextracts an alternative playback number from the playback control information, and extracts a content name from playback control information whose playback number matches the alternative playback number. The playback control unitthen instructs a decryption unitand a playback unitto decrypt and play back encrypted content identified by the extracted content name.