发明名称 Protection of a digital content distribution system
摘要 <p>A content distribution system (3) is provided in a pseudo closed space (4) like public facilities or establishments. The content distribution system includes a content distribution apparatus (1) distributing content (5) formed of digital information, and a plurality of users present within the pseudo closed space use respective portable content reception apparatuses (2) to receive and reproduce the content. The content distribution apparatus also distributes a signal for enabling the content to be reproduced continuously by the content reception apparatus. Even if the content reception apparatus has received the content, it cannot reproduce the content when its user leaves the pseudo closed space and accordingly the reception apparatus cannot receive that signal from the content distribution apparatus.</p>
申请公布号 EP1139197(A2) 申请公布日期 2001.10.04
申请号 EP20010108037 申请日期 2001.03.29
申请人 SHARP KABUSHIKI KAISHA 发明人 TAKITA, YUKIKO
分类号 G06F12/14;G06F1/00;G06F13/00;G06F17/30;G06F21/10;G06F21/60;G06F21/62;G06Q10/00;G06Q50/00;G06Q50/10;H04H20/00;H04H20/61;H04H20/91;H04H60/16;(IPC1-7):G06F1/00 主分类号 G06F12/14
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