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:
Sep. 04, 2012
Filed:
Aug. 10, 2004
Yoshikazu Takashima, Tokyo, JP;
Tomoyuki Asano, Kanagawa, JP;
Satoshi Kitani, Tokyo, JP;
Katsumi Muramatsu, Tokyo, JP;
Jun Yonemitsu, Kanagawa, JP;
Kenjiro Ueda, Kanagawa, JP;
Yoshikazu Takashima, Tokyo, JP;
Tomoyuki Asano, Kanagawa, JP;
Satoshi Kitani, Tokyo, JP;
Katsumi Muramatsu, Tokyo, JP;
Jun Yonemitsu, Kanagawa, JP;
Kenjiro Ueda, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An information processing apparatus, an information recording medium, an information processing method, and a computer program are provided. In an information recording medium storing many pieces of content, a configuration that allows use management on segmented content basis is provided. A plurality of content management units corresponding to title, index and other information are set by partitioning stored content in an information recording medium. Different unit keys that are encryption keys are allocated to different content management units. At least the content real data included in each content management unit is encrypted by use of the unit key and the encrypted data is stored. In content reproduction, units are identified and decryption is executed by use of a unit key corresponding to each unit for reproduction. In an information recording medium storing many pieces of content for example, each of segmented pieces of content may be managed.