MESSAGING PROTOCOL FOR DEMAND-CAST SYSTEM AND BANDWIDTH MANAGEMENT
    1.
    发明申请
    MESSAGING PROTOCOL FOR DEMAND-CAST SYSTEM AND BANDWIDTH MANAGEMENT 审中-公开
    用于需求管理系统和带宽管理的消息协议

    公开(公告)号:WO0156272A9

    公开(公告)日:2002-10-24

    申请号:PCT/US0102452

    申请日:2001-01-24

    摘要: Messaging protocols for use between components of an interactive program guide (IPG) delivery system. The protocol provides a way to more efficiently utilize the finite bandwidth available for distribution of IPG video sequences. One embodiment comprises messaging protocols for communication between a session manager (702), a transport stream generator (704), and a set top terminal (706). The protocol for communication from the Transport stream generator (704) to the set top terminal (706) specifies content for a demand-cast index table that may be transmitted within a private section of a MPEG transport stream. This includes a list of available demand-cast streams. The protocol for communication from the set top terminal (706) to the session manager (702) includes acquisition, release, and request messages. The protocol for communication from the session manager (702) to the transport stream generator (704) includes stream release, stream request, and reset messages, and the protocol for communication from the transport stream generator (704) to the session manager (702) includes acknowledgements for those messages.

    摘要翻译: 用于交互式节目指南(IPG)传送系统的组件之间的消息传递协议。 该协议提供了一种更有效地利用可用于IPG视频序列分发的有限带宽的方法。 一个实施例包括用于会话管理器(702),传输流发生器(704)和机顶终端(706)之间的通信的消息传送协议。 用于从传输流发生器(704)到机顶终端(706)的通信的协议规定了可以在MPEG传输流的私有部分内发送的请求转播索引表的内容。 这包括可用的需求转换流列表。 用于从机顶终端(706)到会话管理器(702)的通信协议包括获取,释放和请求消息。 用于从会话管理器(702)到传输流生成器(704)的通信协议包括流释放,流请求和复位消息,以及用于从传输流发生器(704)到会话管理器(702)的通信协议, 包括对这些消息的确认。

    SERVER-CENTRIC SEARCH FUNCTION IN AN INTERACTIVE PROGRAM GUIDE
    3.
    发明申请
    SERVER-CENTRIC SEARCH FUNCTION IN AN INTERACTIVE PROGRAM GUIDE 审中-公开
    交互式程序指南中的服务器中心搜索功能

    公开(公告)号:WO0175546A2

    公开(公告)日:2001-10-11

    申请号:PCT/US0110230

    申请日:2001-03-29

    摘要: Techniques for searching a program guide database. In accordance with a method, one or more search criteria (e.g., keywords) are received and a request for a search is then sent, along with the search criteria, to a head end of an information distribution system. In response, one or more search results are received from the head end. In this server-centric system, the program guide database is searched at the head end. The search results can be displayed on one search result IPG page (or more, if necessary) or displayed one at a time on the respective IPG page that includes the search result. Upon receiving an indication that a particular search result has been selected, one or more streams associated with the selected search result can be retrieved and decoded to recover the selected program, which can then be displayed.

    摘要翻译: 搜索节目指南数据库的技术。 根据一种方法,接收一个或多个搜索条件(例如,关键词),然后将搜索请求连同搜索条件一起发送到信息分发系统的头端。 作为响应,从头端接收一个或多个搜索结果。 在这个以服务器为中心的系统中,在头端搜索节目指南数据库。 搜索结果可以显示在一个搜索结果IPG页面上(或更多,如果需要)或在包含搜索结果的相应IPG页面上一次显示。 在接收到选择了特定搜索结果的指示之后,可以检索和解码与所选择的搜索结果相关联的一个或多个流,以恢复所选择的节目,然后可以显示该节目。