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    • 5. 发明授权
    • Master and slave subscriber stations for digital video and interactive services
    • 用于数字视频和互动服务的主站和从站用户站
    • US06588017B1
    • 2003-07-01
    • US09239058
    • 1999-01-27
    • Theodore Calderone
    • Theodore Calderone
    • H04N7173
    • H04N21/47202H04N7/106H04N7/162H04N7/17309H04N7/20H04N21/434H04N21/43632
    • A master subscriber station is provided that supports a relatively low cost slave subscriber station. The slave subscriber station relies upon the master subscriber station for certain functions and therefore can be implemented as a lower cost design. Duplication of functionality is therefore minimized, resulting in lower complexity and lower overall costs. The master subscriber station has the ability to process multiple video streams such that one or more of the additional streams can be sent via coaxial cabling to a slave subscriber station, as well as receive and process user control signals from the slave subscriber station. The slave subscriber has the ability to receive and demodulate video and audio streams sent by the master subscriber station, as well as send user control commands back to the master subscriber station over the same coaxial cable that delivers the video streams to the slave subscriber station.
    • 提供主用户站,其支持相对低成本的从用户站。 从用户站依赖于主用户站的某些功能,因此可以被实现为较低成本的设计。 因此功能的重复被最小化,导致更低的复杂性和更低的总体成本。 主用户站具有处理多个视频流的能力,使得可以通过同轴电缆将一个或多个附加流发送到从用户站,以及从从用户站接收和处理用户控制信号。 从用户具有接收和解调由主用户台发送的视频和音频流的能力,以及通过相同的同轴电缆将用户控制命令发送回主用户站,该同轴电缆将视频流传送到从用户站。
    • 6. 发明授权
    • Common carrier, multiple output RF upconverter
    • 通用载波,多输出RF上变频器
    • US06480703B1
    • 2002-11-12
    • US09708315
    • 2000-11-07
    • Theodore CalderoneMark J. Foster
    • Theodore CalderoneMark J. Foster
    • H04B102
    • G10L15/30H03D7/163H04B1/0483H04B2001/0491
    • The invention provides a mechanism for implementing a common carrier, multiple output RF upconverter. The preferred embodiment of the invention comprises a method and apparatus for distributing the LO signals for both the first and second LO functions to several upconverter sections simultaneously. This technique eliminates the frequency synthesizers and VCOs typically required for each individual upconverter section, thereby substantially reducing the board space and component count required to perform this function. By providing a distributed LO, only two LO synthesizers and VCO's are required per board, where a board might support anywhere from two to twelve or more upconverters.
    • 本发明提供了一种用于实现公共载波,多输出RF上变频器的机制。 本发明的优选实施例包括一种用于将第一和第二LO功能的LO信号同时分配到多个上变频器部分的方法和装置。 该技术消除了每个单独的上变频器部分通常需要的频率合成器和VCO,从而大大减少了执行该功能所需的电路板空间和组件数量。 通过提供分布式LO,每个板只需要两个LO合成器和VCO,其中板可以支持两到十二个或更多个上变频器的任何地方。