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1. 发明申请

WO1995028799A1 METHOD AND APPARATUS FOR PROVIDING INTERACTIVE ELECTRONIC PROGRAMMING GUIDE 审中-公开
标题翻译：提供交互式电子编程指南的方法和装置
公开(公告)号：WO1995028799A1
公开(公告)日：1995-10-26
申请号：PCT/US1995004330
申请日：1995-04-18
申请人： SCIENTIFIC-ATLANTA, INC.
发明人： SCIENTIFIC-ATLANTA, INC. , LETT, David, B. , RALEY, William, Michael, Jr. , HAYASHI, Michael, T.
IPC分类号： H04N01/00
CPC分类号： H04N21/2543 , G06K7/0047 , G06K7/0086 , H04N1/00098 , H04N7/163 , H04N7/165 , H04N7/1675 , H04N7/17318 , H04N21/47202 , H04N21/8166 , H04N21/84
摘要： A subscription television system is provided that transmits a plurality of television signals to a plurality of subscribers. The television signals include pay-per-view programs (purchased by feature) or near-video-on-demand programs (purchased for a period of time for unlimited viewing) that are provided only to subscribers that purchase the programs. Data (16) representing an electronic programming guide is also transmitted. The electronic programming guide can be displayed by a subscriber terminal at the subscriber's location. The electronic programming guide is a grid (Fig. 4A and 4B) listing television programs by date, time and channel. A subscriber can select programs for watching or recording from the electronic program guide. Moreover, the subscriber can purchase pay-per-view or near-video-on-demand programs from the electronic programming guide.
摘要翻译：提供了向多个用户发送多个电视信号的订阅电视系统。电视信号包括仅为购买节目的用户提供的按次付费节目（按功能购买）或近视频点播节目（购买一段时间无限制观看）。也传送代表电子节目指南的数据（16）。电子节目指南可以由用户位置处的用户终端显示。电子节目指南是按日期，时间和频道列出电视节目的网格（图4A和4B）。用户可以从电子节目指南中选择观看或录制节目。此外，用户可以从电子节目指南中购买按次付费或近视频点播节目。

2. 发明申请

WO1992022987A1 SYSTEM FOR BROADBAND DESCRAMBLING OF SYNC SUPPRESSED TELEVISION SIGNALS 审中-公开
标题翻译：用于同步抑制电视信号的宽带显示系统
公开(公告)号：WO1992022987A1
公开(公告)日：1992-12-23
申请号：PCT/US1992004936
申请日：1992-06-12
申请人： SCIENTIFIC-ATLANTA, INC.
发明人： SCIENTIFIC-ATLANTA, INC. , RAISER, James, E. , BAGLEY, Julius, B. , HAYASHI, Michael, T. , HARNEY, Michael, P. , FARMER, James, O. , BACON, Kinney, C. , COOK, Alex, M., Jr.
IPC分类号： H04N07/167
CPC分类号： H04N7/1713
摘要： A television system having sync suppression scrambling and descrambling which includes in band and out of band signaling methods. The in band signaling method modulates the IF sound carrier of a premium video channel with timing and data pulses (Figs. 2A, 2B) while the out of band signaling method modulates the previously modulated IF sound on a separate carrier onto a separate out of band data carrier (Figs. 3A, 3B). The in band signaling method uses a descrambler which tunes a channel before demodulating the timing and data pulses from the sound carrier while the out of band signaling method tunes a selected data carrier to demodulate the timing and data pulses. In both methods, the timing pulses are used to restore the levels of the synchronization pulses in the sync suppressed video signal, and thus descramble the signal, while the data pulses are used for addressable messaging to the descrambler including authorization. The out of band descrambler provides broadband sync restoration for a particular channel and thus does not need a broadband tuner for the video signal.
摘要翻译：具有同步抑制加扰和解扰的电视系统，其包括频带和带外信令方法。带内信令方法利用定时和数据脉冲调制优质视频信道的IF声音载波（图2A，2B），而带外信令方法将单独载波上的先前调制的IF声音调制到单独的带外数据载体（图3A，3B）。带内信令方法使用解扰器，其在解调来自声载波的定时和数据脉冲之前调谐信道，而带外信令方法调谐所选择的数据载波以解调定时和数据脉冲。在两种方法中，定时脉冲用于恢复同步抑制的视频信号中的同步脉冲的电平，并且因此解扰信号，同时数据脉冲用于包括授权的解扰器的可寻址消息传送。带外解扰器为特定信道提供宽带同步恢复，因此不需要用于视频信号的宽带调谐器。

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