公开(公告)号：US5917256A

公开(公告)日：1999-06-29

申请号：US15958

申请日：1998-01-30

申请人： Frederick J. Broadbent, II

发明人： Frederick J. Broadbent, II

IPC分类号： H04N7/16 ,  H04M7/167

CPC分类号： H04N7/166 ,  H04N21/4627 ,  H04N21/4755 ,  H04N7/163 ,  Y10T307/937 ,  Y10T307/951

摘要： A timing device for television that controls television viewing by interrupting the input signal, or input signals, to a remote television during a predetermined time or times of day. A user selects and manually presets the timer to automatically close or open an internal switch that alternately connects and interrupts transmission of an input signal, or input signals, to a remote television.

摘要翻译： 一种用于电视的定时装置，其在预定的时间或时间段内通过中断输入信号或输入信号到远程电视来控制电视观看。 用户选择并手动预设定时器，以自动关闭或打开内部开关，交替连接和中断输入信号或输入信号的传输到远程电视。

公开(公告)号：US5412720A

公开(公告)日：1995-05-02

申请号：US877325

申请日：1992-05-01

申请人： W. Leo Hoarty

发明人： W. Leo Hoarty

IPC分类号： G06F3/033 ,  G06F3/048 ,  G06Q30/00 ,  G06T9/00 ,  H04H20/00 ,  H04N20060101 ,  H04N5/44 ,  H04N5/445 ,  H04N5/45 ,  H04N7/10 ,  H04N7/16 ,  H04N7/173 ,  H04N7/26 ,  H04N7/50 ,  H04M7/167

CPC分类号： H04N21/2221 ,  G06F3/04815 ,  H04N19/48 ,  H04N19/61 ,  H04N19/90 ,  H04N21/23614 ,  H04N21/2362 ,  H04N21/2385 ,  H04N21/2665 ,  H04N21/2668 ,  H04N21/4312 ,  H04N21/4345 ,  H04N21/4348 ,  H04N21/4383 ,  H04N21/482 ,  H04N21/488 ,  H04N21/6118 ,  H04N21/6168 ,  H04N21/6587 ,  H04N5/4401 ,  H04N7/10 ,  H04N7/173 ,  H04N7/17345 ,  G06F2203/04802 ,  H04N2007/17372 ,  H04N2007/1739 ,  H04N21/812 ,  H04N5/45

摘要： An interactive cable television system having a plurality of feeder servers, a plurality of home interface controllers and a feeder port. Home interface controllers are each equipped with a radio frequency input and a data communications link with a receiver and transmitter in the feeder port. A node control in communication with the feeder port determines whether a home interface controller is active and then assigns a feeder server to it. The feeder server provides one of a plurality of information signals from a headend depending on a selection input. Digitally compressed video signals are provided at the headend. The digitally compressed video signals can be provided by a modulator means at a carrier frequency greater than the upper frequency limit for carrying analog television signals with acceptable quality on the cable system.The cable television system may make use of a scrambler that maintains the chrome subcarrier on a sync-stripped output signal at all times including the period of vertical retrace. The sync-stripped output signal is modulated at a first carrier frequency and the sync-signal is modulated at a second carrier frequency. A corresponding decoder is provided for receiving scrambled signals and restoring the sync-signal to restore the television signal.

摘要翻译： 一种具有多个馈线服务器，多个家庭接口控制器和馈线端口的交互式有线电视系统。 家庭接口控制器各自配备有射频输入和与馈线端口中的接收器和发射器的数据通信链路。 与馈线端口通信的节点控制器确定家庭接口控制器是否处于活动状态，然后为其馈送服务器。 馈送服务器根据选择输入从前端提供多个信息信号之一。 在头端提供数字压缩视频信号。 数字压缩视频信号可以由调制器装置以大于上限频率的载波频率提供，以在电缆系统上承载具有可接受质量的模拟电视信号。 有线电视系统可以利用扰码器，该加扰器在包括垂直回扫的周期的任何时间将铬载波保持在同步剥离的输出信号上。 同步剥离的输出信号以第一载波频率被调制，同步信号以第二载波频率被调制。 提供相应的解码器用于接收加扰信号并恢复同步信号以恢复电视信号。

公开(公告)号：US5349641A

公开(公告)日：1994-09-20

申请号：US105056

申请日：1993-08-12

申请人： Francoise Coutrot ,  Jean-Luc Giachetti

发明人： Francoise Coutrot ,  Jean-Luc Giachetti

IPC分类号： H04N7/167 ,  H04M7/167

CPC分类号： H04N7/1675 ,  H04N21/2541 ,  H04N21/26606 ,  H04N21/4623

摘要： A process for the transmission and reception of scrambled conditional access programs, which are synchronously transmitted with entitlement control messages (ECM), with a reduced program switching time. The entitlement control messages (ECM) have check words, which are changed after a period of time called a phase, for descrambling the conditional access programs. The process includes transmitting main check messages (ECMp) for a main access program at a first frequency (Fp) and transmitting secondary check messages (ECMs) for secondary programs at a lower, second frequency (Fs). The secondary check messages (ECMs) are transmitted between two successive transmission of the main check messages (ECMp) such that all of the secondary check messages (ECMs) for each of the secondary programs are transmitted in a single phase. Therefore, a check word for any program is quickly acquired and program switching time is reduced.

摘要翻译： 用于发送和接收加扰条件访问程序的过程，其与授权控制消息（ECM）同步发送，具有减少的程序切换时间。 授权控制消息（ECM）具有在称为相位的时间段之后被改变的校验字，用于解扰条件访问程序。 该过程包括以第一频率（Fp）发送用于主接入节目的主要校验消息（ECMp），并以较低的第二频率（Fs）发送次要节目的辅助校验消息（ECM）。 辅助检查消息（ECM）在主要检查消息（ECMp）的两个连续传输之间传送，使得用于每个次要程序的所有辅助检查消息（ECM）以单个相位传输。 因此，快速获取任何程序的检查字，并减少程序切换时间。