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1.发明授权Method and apparatus for background caching of encrypted programming data for later playback 失效用于背景缓存加密编程数据以供稍后播放的方法和装置公开(公告)号：US06961430B1
公开(公告)日：2005-11-01
申请号：US09699650
申请日：2000-10-30
CPC分类号： H04N5/913 , H04N5/76 , H04N5/781 , H04N5/85 , H04N5/907 , H04N7/1675 , H04N21/4147 , H04N21/4334 , H04N21/4405 , H04N21/47211 , H04N2005/91364
摘要： A method and apparatus for enabling background caching of encrypted programming data on a storage medium for later playback in a digital video recorder (DVR) system. A set-top box (STB) equipped with a DVR searches a program guide for upcoming pay-per-view (PPV) events. When the PPV event begins, the STB tunes an appropriate transponder and begins receiving programming data packets containing audio, video, system time and conditional access data packets associated with the event, which are stored for playback on a storage medium. When the user turns the STB on and selects an option to playback a previously-recorded PPV event, the appropriate programming data is retrieved from the storage medium, and the STB recreates the original transmission timing of the data, to be displayed on a display device of the user.
摘要翻译： 一种用于使数据录像机（DVR）系统中的加密编程数据能够在存储介质上进行背景缓存以供稍后播放的方法和装置。 装有DVR的机顶盒（STB）搜索节目指南，了解即将到来的按次付费（PPV）事件。 当PPV事件开始时，STB调整适当的应答器，并开始接收包含与事件相关联的音频，视频，系统时间和条件访问数据分组的编程数据分组，其被存储用于在存储介质上回放。 当用户打开STB并选择播放先前记录的PPV事件的选项时，从存储介质检索适当的编程数据，并且STB重新创建数据的原始传输定时，以显示在显示设备上 的用户。
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2.发明授权System for distribution of satellite signals from separate multiple satellites on a single cable line 有权用于在单根电缆线上分配来自分离的多颗卫星的卫星信号的系统公开(公告)号：US06600730B1
公开(公告)日：2003-07-29
申请号：US09137262
申请日：1998-08-20
IPC分类号： H04J108
CPC分类号： H04B7/18517
摘要： A system for distributing separate multiple satellite communication services signals to receivers at a local earth site on a single cable line. A dual satellite antenna receives the signals from two separate satellites, each of which can correspond to a respective satellite communication service. The received satellite signals are processed into two separate frequency bands. A frequency converter using frequency division multiplexing converts at least one of the received frequency bands so as to position both of the frequency bands adjacent to each other. A summer receives the adjacent frequency bands and distributes them on a single cable line to receivers so that the receivers have access to the separate multiple satellite communication service signals on a single cable line. A demultiplexer coupled to the adjacent frequency bands from the summer enables the plurality of receivers at the output of the demultiplexer lines to obtain simultaneous access to both satellite communication services distributed over the single cable line to the receiver.
摘要翻译： 用于将单独的多个卫星通信服务信号分发到单个电缆线上的本地地球站点的接收机的系统。 双卫星天线接收来自两个分开的卫星的信号，每个卫星可以对应于相应的卫星通信业务。 接收到的卫星信号被处理成两个分开的频带。 使用频分复用的频率转换器将接收到的频带中的至少一个转换成将两个频带彼此相邻定位。 夏天接收相邻的频带，并将它们分布在单根电缆线路上，以便接收机可以在单根电缆线上访问单独的多个卫星通信业务信号。 耦合到来自夏季的相邻频带的解复用器使得在多路分解器线路的输出处的多个接收机可以同时访问分布在单个电缆线路上的卫星通信服务到接收机。
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