Methods and apparatus for constructing a program association table when reducing multiplexed data streams
    4.
    发明授权
    Methods and apparatus for constructing a program association table when reducing multiplexed data streams 有权
    减少多路复用数据流时构建程序关联表的方法和装置

    公开(公告)号:US06934303B2

    公开(公告)日:2005-08-23

    申请号:US09800806

    申请日:2001-03-07

    CPC分类号: H04N21/23608 H04N21/2362

    摘要: The present invention provides methods and apparatus for creating a Program Association Table (PAT) for a reduced portion of a multiplexed data stream, when the multiplexed data stream has been reduced, for example, to carry fewer services over a cable television plant. More particularly, the present invention provides methods and apparatus for creating a PAT for a desired combination of multiplexed data stream subgroups contained within an incoming data stream, when the incoming multiplexed data stream is reduced. The invention enables a new PAT to be output which correctly corresponds to the services in a reduced data stream (e.g., for cable-side transmissions). The present invention is particularly useful when reducing high data rate satellite television data streams for cable-side transmission.

    摘要翻译: 本发明提供了当多路复用数据流已经被减少,例如在有线电视设备上携带较少服务时,为复数据流的减少部分创建节目关联表(PAT)的方法和装置。 更具体地,本发明提供了当输入的多路复用数据流被减少时,为输入数据流中包含的多路复用数据流子组的期望组合创建PAT的方法和装置。 本发明使得能够输出正确对应于减少数据流(例如,用于电缆侧传输)中的服务的新PAT。 当减少用于电缆侧传输的高数据速率卫星电视数据流时,本发明特别有用。