Invention Grant
US08453254B2 Content receiver, content reproducer, content reproducing system, content writing-out method, viewing expiration time determining method, and program
有权
内容接收器，内容再现器，内容再现系统，内容写入方法，查看到期时间确定方法和程序
- Patent Title: Content receiver, content reproducer, content reproducing system, content writing-out method, viewing expiration time determining method, and program
- Patent Title (中): 内容接收器，内容再现器，内容再现系统，内容写入方法，查看到期时间确定方法和程序
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Application No.: US12828644Application Date: 2010-07-01
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Publication No.: US08453254B2Publication Date: 2013-05-28
- Inventor: Takuya Nishimura
- Applicant: Takuya Nishimura
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2009-211394 20090914; JP2010-066659 20100323
- Main IPC: H04L29/06
- IPC: H04L29/06
Abstract:
A content receiver writes out, together with content received from a content server, time supply source designation information indicating a second time supply source designated by a copyright protection system (DRM) to an exchangeable medium in association with the content. When the time supply source designation information is recorded in the exchangeable medium, a content reproducer performs viewing expiration time determination for the content recorded in the exchangeable medium referring time obtained on the basis of the second time supply source indicated by the time supply source designation information instead of a first time supply source referred to in order to specify present time used in determining a viewing expiration time in a content protection system (CPS).
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