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    • 10. 发明授权
    • Providing multiple levels of interactive television service using triggers and trigger filters
    • 使用触发器和触发滤镜提供多级交互式电视服务
    • US07568214B2
    • 2009-07-28
    • US10893518
    • 2004-07-16
    • Bruce A. LeakDaniel J. ZigmondDean J. Blackketter
    • Bruce A. LeakDaniel J. ZigmondDean J. Blackketter
    • H04N7/173
    • H04N21/4331H04N7/163H04N7/17318H04N21/4516H04N21/454H04N21/4622H04N21/4722H04N21/4782H04N21/812H04N21/8547H04N21/8586
    • An interactive television system includes “connected” receiver units capable of establishing bi-directional connections to remote information stores, such as Web servers, and “disconnected” receiver units unequipped to make such connections. The system supports the use of broadcast triggers that include connectivity values indicating whether an information resource identified by a trigger refers to “connected content” or “disconnected content.” The term “connected content” refers to information resources that require bi-directional connections to remote information stores; the term “disconnected content” refers to information resources, such as a locally stored program guide, that do not require such bi-directional connections. Disconnected receiver units identify and reject connected-content triggers by examining connectivity values broadcast as part of triggers. Thus, content providers can broadcast connected-content triggers to connected and disconnected receiver units without interrupting disconnected receiver units with links to inaccessible content. Furthermore, the ability to distinguish between connected and disconnected content allows vendors who sell or lease receiver units to offer a lower level of service to those customers who do not wish to pay for the ability to access connected content.
    • 交互式电视系统包括能够建立到诸如Web服务器之类的远程信息存储器的双向连接的“连接的”接收器单元,以及未被配置以进行这样的连接的“断开”的接收器单元。 系统支持使用广播触发器,其中包括连接值,指示触发信号是指“连接的内容”还是“断开连接的内容”。 术语“连接的内容”是指需要与远程信息存储的双向连接的信息资源; 术语“断开的内容”是指不需要这种双向连接的信息资源,诸如本地存储的节目指南。 断开的接收机单元通过检查作为触发器的一部分广播的连接值来识别和拒绝连接的内容触发。 因此,内容提供商可以将连接内容触发器广播到连接和断开的接收机单元,而不会中断具有不可访问内容的链接的断开的接收机单元。 此外,区分连接和断开连接的内容的能力允许出售或租用接收器单元的供应商向那些不希望支付访问连接内容的客户提供较低级别的服务。