发明授权
US07386618B2 Distribution system, distribution apparatus, and reception apparatus for distributing contents having usage expiry
有权
用于分发具有使用期满的内容的分发系统，配送装置和接收装置
- 专利标题： Distribution system, distribution apparatus, and reception apparatus for distributing contents having usage expiry
- 专利标题（中）： 用于分发具有使用期满的内容的分发系统，配送装置和接收装置
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申请号： US10431500申请日： 2003-05-08
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公开(公告)号： US07386618B2公开(公告)日： 2008-06-10
- 发明人: Yuichi Futa , Motoji Ohmori , Makoto Tatebayashi , Masaya Yamamoto
- 申请人： Yuichi Futa , Motoji Ohmori , Makoto Tatebayashi , Masaya Yamamoto
- 申请人地址： JP Osaka
- 专利权人： Matsushita Electric Industrial Co., Ltd.
- 当前专利权人： Matsushita Electric Industrial Co., Ltd.
- 当前专利权人地址： JP Osaka
- 代理机构： Wenderoth, Lind & Ponack, L.L.P.
- 优先权： JP2002-134195 20020509
- 主分类号： G06F15/16
- IPC分类号： G06F15/16
摘要：
A reception apparatus includes a first timer and sends to a distribution apparatus a first date-time clocked by the first timer. The distributing apparatus includes a second timer, and generates expiry information based on a difference obtained by subtracting, from the first date-time, a second date-time that is clocked by the second timer. The expiry information is used to adjust a usage expiry date-time of content. The reception apparatus judges whether playback of the content is permitted based on the first timer and the expiry information. With this arrangement, unauthorized use of the content beyond the expiry date-time is prevented.