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:
Jan. 06, 2015
Filed:
Feb. 16, 2006
Yoshikazu Takashima, Tokyo, JP;
Tateo Oishi, Saitama, JP;
Katsumi Muramatsu, Tokyo, JP;
Kenjiro Ueda, Kanagawa, JP;
Motoki Kato, Kanagawa, JP;
Yoshikazu Takashima, Tokyo, JP;
Tateo Oishi, Saitama, JP;
Katsumi Muramatsu, Tokyo, JP;
Kenjiro Ueda, Kanagawa, JP;
Motoki Kato, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
To provide a configuration in which a unit classification number corresponding to a content playback path is set based on various units. A unit classification number defining a playback path of content including encrypted data having different variations generated by encrypting a segment portion which forms the content by using a plurality of segment keys and encrypted content generated by encrypting a non-segment portion by a unit key is set based on various units, such as a content management unit and an index. In a CPS unit key file storing key generating information concerning CPS units as content management units, settings of unit classification numbers are indicated. Based on the CPS unit key file, a unit classification number to which content to be played back belongs can be obtained.