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    • 10. 发明授权
    • Receiving an information resource from the internet if it is not received from a broadcast channel
    • 如果没有从广播频道接收到,则从互联网接收信息资源
    • US06571392B1
    • 2003-05-27
    • US09295436
    • 1999-04-20
    • Daniel J. ZigmondDean J. Blackketter
    • Daniel J. ZigmondDean J. Blackketter
    • H04N7173
    • H04H20/93H04N7/17318H04N21/4331H04N21/435H04N21/4622H04N21/4782H04N21/8586
    • In interactive television, information from an information resource may be displayed along with television video in a synchronized fashion. When information is to be displayed at a point in the television video, a Uniform Resource Identifier (URI) that identifies the information resource is broadcast along with the television video on a one-way broadcast communication channel. A receiver unit receives the URI from the broadcast channel. If the information resource identified by the URI is available locally (for example, is present in local storage on the receiver unit), then the receiver unit uses the URI to retrieve the information resource locally. If, on the other hand, the information resource is not available locally, then the receiver unit uses the URI to retrieve the information resource from the Internet. The information resource can therefore be received from a high speed source (for example, from VBI lines 10-20) if such reception is possible, but if such reception is not possible then the information resource can be retrieved. from another source (for example, from the Internet). Once the receiver unit has retrieved the information resource, the receiver unit can display the information along with the television video.
    • 在交互式电视中,来自信息资源的信息可以以电视视频同步显示。 当在电视视频中的某个点显示信息时,识别信息资源的统一资源标识符(URI)与电视视频一起在单向广播通信信道上被广播。 接收机单元从广播信道接收该URI。 如果URI识别的信息资源在本地可用(例如,存在于接收机单元的本地存储器中),则接收器单元使用该URI来本地检索信息资源。 另一方面,如果信息资源在本地不可用,则接收器单元使用URI从因特网检索信息资源。 因此,如果这样的接收是可能的,则可以从高速源(例如,从VBI线10-20)接收信息资源,但是如果这样的接收是不可能的,则可以检索信息资源。 来自另一个来源(例如,从互联网)。 一旦接收器单元检索到信息资源,接收器单元就可以显示与电视视频一起的信息。