专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明公开

EP1115248A1 Method and apparatus for generating a multichannel signal 失效转让
标题翻译： Verfahren undGerätzur Erzeugung eines Mehrkanalsignal
公开(公告)号：EP1115248A1
公开(公告)日：2001-07-11
申请号：EP01104853.5
申请日：1993-01-07
申请人： Multichannel Communication Sciences, Inc.
发明人： Katznelson, Ron D.
IPC分类号： H04N7/167 , H04N7/171
CPC分类号： H04L5/06 , H04N7/08 , H04N7/162 , H04N7/1675 , H04N7/169 , H04N7/1713
摘要： A multichannel television access control system is disclosed wherein processing of the broadband signal is performed by gated coherent RF injection on a plurality of channels, thereby effecting selective descrambling of an arbitrary subset of channels in a channel group. The system provides for a closed loop injection signal phasor control so as to maintain substantially constant relationship between the television signals and the injected signals. The combined signals are supplied to subscribers enabling the use of their cable ready equipment. The broadband signal is coupled to a broadband amplifier (104) via a power splitter (102). The injected signals are combined through line (114) with the amplified broadband signal by directional coupler (108), resulting in the composite signal on line (109). The broadband signal on line (109) is fed to the subscriber port (112) through directional tap (110). The injected signals forming together the composite signal injected at line (114) are generated by a digital broadband generator (136) feeding RF switch (116). During the time in which injection is required. RF switch (116) is at position (117).
摘要翻译：公开了一种多通道电视接入控制系统，其中通过在多个信道上的门控相干RF注入来执行宽带信号的处理，从而对通道组中的任意信道子集进行选择性解扰。该系统提供闭环注入信号相量控制，以便在电视信号和注入的信号之间保持基本恒定的关系。组合的信号被提供给订户，使得能够使用其有线就绪设备。宽带信号通过功率分配器（102）耦合到宽带放大器（104）。注入的信号通过线路（114）与定向耦合器（108）的放大的宽带信号组合，导致线路（109）上的复合信号。线路（109）上的宽带信号通过方向分接头（110）馈送到用户端口（112）。形成在线（114）处注入的复合信号的注入信号由馈送RF开关（116）的数字宽带发生器（136）产生。在需要注射的时间内。 RF开关（116）处于位置（117）。

IPRDB

热门服务

关于我们

友情链接

联系方式