Method and apparatus for displaying channel identification information
    51.
    发明授权
    Method and apparatus for displaying channel identification information 失效
    用于显示频道识别信息的方法和装置

    公开(公告)号:US5301028A

    公开(公告)日:1994-04-05

    申请号:US800002

    申请日:1991-11-29

    摘要: A subscriber terminal includes a receiver for receiving a television signal including video, audio, and data information. A channel of the television signal may be selected for display on the television. A memory stores channel identification information such as channel identifiers. The channel identifiers include at least one display character. A processor establishes a relationship between channel identification information and channel numbers associated with channels of the television signal. An on-screen display control circuit controls the display of character information on the television and has the capability of overlaying the channel number and the channel identification information on the video portion of a selected channel displayed on the television for a predetermined period of time. Program identification information such as program titles may also be displayed. Alternatively or additionally, the channel identification information may be displayed on a display such an LED display of a subscriber terminal.

    摘要翻译: 用户终端包括用于接收包括视频,音频和数据信息的电视信号的接收机。 可以选择电视信号的频道以在电视机上显示。 存储器存储诸如频道标识符的频道标识信息。 信道标识符包括至少一个显示字符。 处理器建立信道识别信息和与电视信号的信道相关联的信道号之间的关系。 屏幕显示控制电路控制电视上的字符信息的显示,并且具有将频道号和频道识别信息叠加在电视机上显示的所选频道的视频部分达预定时间段的能力。 还可以显示诸如节目标题的节目识别信息。 或者或另外,信道标识信息可以显示在用户终端的诸如LED显示器的显示器上。

    In-band controller
    52.
    发明授权
    In-band controller 失效
    带内控制器

    公开(公告)号:US5058160A

    公开(公告)日:1991-10-15

    申请号:US593329

    申请日:1990-10-01

    IPC分类号: H04N7/167

    CPC分类号: H04N7/1675

    摘要: The present invention discloses a method and apparatus for providing a cable TV system with the ability to issue information from a system manager, determine whether the information is intended for a set top designed to receive out-of-band information or in-band information, send the information to the appropriate circuitry. Reformatting of some information is necessary and is performed by a format translator. For in-band information, information may be sent over one or more of a plurality of data streams. Certain types of information are sent over one or more data streams based on the type of information and characteristics of the data streams. It is further disclosed that for efficiency, similar information intended for several addresses is grouped together in a database manager so that the information may be sent to plural addresses at one time. Scramblers are employed with the capability of inserting data onto nonscrambled channels.

    摘要翻译: 本发明公开了一种用于向有线电视系统提供从系统管理器发出信息的能力的方法和装置,确定信息是否针对被设计为接收带外信息或带内信息的机顶盒, 将信息发送到相应的电路。 重新格式化某些信息是必要的,并由格式转换器执行。 对于带内信息,可以通过多个数据流中的一个或多个来发送信息。 基于信息的类型和数据流的特性,通过一个或多个数据流发送某些类型的信息。 进一步公开的是,为了效率,用于多个地址的类似信息被分组在一起在数据库管理器中,使得可以一次将信息发送到多个地址。 使用加扰器将数据插入非加扰信道的能力。

    Sync suppression scrambling of television signals for subscription TV
    53.
    发明授权
    Sync suppression scrambling of television signals for subscription TV 失效
    用于订阅电视的电视信号的同步抑制加扰

    公开(公告)号:US4466017A

    公开(公告)日:1984-08-14

    申请号:US334040

    申请日:1981-12-23

    申请人: Robert O. Banker

    发明人: Robert O. Banker

    CPC分类号: G06F11/1028 H04N7/1713

    摘要: In order to provide higher efficiency of security in sync suppression scrambling of subscription TV signals, the signals are encoded with a timing pulse having a selected time delay relationship with the suppressed horizontal sync intervals of the TV signals. The timing can be implemented digitally by selecting a plurality (e.g., 12) of different timings. The timing can also be dynamically varied. The TV signals are descrambled by restoring the sync pulses at only those receiving stations authorized to receive the premium subscription programming which have circuits for generating restoring pulses with the selected time relationship upon reception of the timing signals. Accordingly, the use of unauthorized descramblers, which are insensitive to the timing signals or do not provide the restoring pulses in proper time relationship, is discouraged.

    摘要翻译: 为了在订阅电视信号的同步抑制加扰中提供更高的安全性,信号用与TV信号的抑制的水平同步间隔具有选定的时间延迟关系的定时脉冲编码。 定时可以通过选择多个(例如,12个)不同的定时数字地实现。 时间也可以动态变化。 电视信号通过仅在授权接收优惠订阅节目的那些接收台恢复同步脉冲来解扰,该接收台具有在接收到定时信号时具有选择的时间关系的用于产生恢复脉冲的电路。 因此,不鼓励使用对定时信号不敏感或不提供适当时间关系的恢复脉冲的未经授权的解扰器。

    Reprogrammable subscriber terminal
    54.
    发明授权
    Reprogrammable subscriber terminal 有权
    可编程用户终端

    公开(公告)号:US08120924B2

    公开(公告)日:2012-02-21

    申请号:US11758271

    申请日:2007-06-05

    IPC分类号: H05K7/00

    摘要: A reprogrammable subscriber terminal of a subscription television service which can have the control program code of its control processor modified by downloading new program code from the headend. The control processor stores a boot program in an internal read only memory. Upon start up and resets, the boot program determines whether the control program should be changed from a command sent from the headend. The command, termed a parameters transactions, includes the number of expected download program code transactions required to complete the control code modification, the memory space areas where the code is to be loaded, and the channel over which the download program code transactions are to be transmitted. The channel is tuned and when the boot program receives all the download program code transactions accurately and stores them, the boot program will cause the control program to be restarted at a selected address of the new or modified control program code which has been downloaded. The boot program may download code to different configurations of subscriber terminals including those with Flash EPROM or extended memories from plug-in expansion modules.

    摘要翻译: 订阅电视服务的可重新编程用户终端,其可以通过从头端下载新的节目代码来修改其控制处理器的控制程序代码。 控制处理器将引导程序存储在内部只读存储器中。 启动和复位时,引导程序确定是否应该从头端发送的命令更改控制程序。 称为参数事务的命令包括完成控制代码修改所需的预期下载程序代码事务的数量,要加载代码的存储空间区域以及下载程序代码事务的通道 传输。 通道被调谐,并且当引导程序准确地接收到所有的下载程序代码事务并存储它们时,引导程序将使控制程序在已被下载的新的或修改的控制程序代码的选定地址处重新启动。 引导程序可以将代码下载到不同配置的用户终端,包括具有来自插件扩展模块的闪存EPROM或扩展存储器的那些。

    Preventing replay attacks on digital information distributed by network
service providers
    56.
    发明授权
    Preventing replay attacks on digital information distributed by network service providers 失效
    防止网络服务提供商分发的数字信息的重播攻击

    公开(公告)号:US6005938A

    公开(公告)日:1999-12-21

    申请号:US767535

    申请日:1996-12-16

    摘要: A technique for preventing replay attacks on digital information distributed by network service providers. At the beginning of a subscription period for a service, a network service provider sends entitlement messages to the subscriber which provide the subscriber for the service with a session key and authorization information. The authorization information specifies a service and a period of time. When an encrypted instance of a service is distributed on the network, it is accompanied by a series of entitlement control messages. Each of the messages includes a value which can be used with the session key to obtain a control word for decrypting the encrypted instance and a time specifier. The subscriber equipment which decrypts the instance of the service does so only if the time specifier in the entitlement control message specifies a time within the time period specified by the authorization information.

    摘要翻译: 一种防止网络服务提供商分发的数字信息的重放攻击的技术。 在服务的订阅周期开始时,网络服务提供商向订户发送授权消息,为订户提供会话密钥和授权信息。 授权信息指定服务和一段时间。 当服务的加密实例在网络上分发时,伴随着一系列授权控制消息。 每个消息包括可以与会话密钥一起使用以获得用于解密加密实例的控制字和时间说明符的值。 仅当授权控制消息中的时间指定者在授权信息指定的时间段内指定时间时,解密服务实例的用户设备才会这样做。

    Chroma-preference control for VIR automatic operation
    57.
    发明授权
    Chroma-preference control for VIR automatic operation 失效
    VIR自动操作的色度偏好控制

    公开(公告)号:US4059838A

    公开(公告)日:1977-11-22

    申请号:US726182

    申请日:1976-09-24

    IPC分类号: H04N9/64 H04N9/68 H04N9/535

    CPC分类号: H04N9/64

    摘要: Viewer preference adjustment of saturation is realized in a VIR controlled color television receiver by provision of a closed loop control circuit exclusive of the RGB matrix. During the presence of the VIR signal a control signal is generated within the closed loop that controls the chrominance to luminance ratio of the chrominance and luminance signals applied to the RGB matrix and to the blue matrix contained within the closed loop. Adjustment of the level of either the luminance signal or the chrominance signal applied to the blue matrix affects the control signal which in turn adjusts said chrominance to luminance ratio to compensate and thereby brings about a shift in the levels of the red, green and blue signals outputted by the RGB matrix to change the saturation of the color picture.

    摘要翻译: 通过提供不包括RGB矩阵的闭环控制电路,在VIR控制的彩色电视接收机中实现观看者偏好的饱和度调整。 在存在VIR信号期间,在闭环中产生控制信号,该控制信号控制施加到RGB矩阵和包含在闭环中的蓝色矩阵的色度和亮度信号的色度与亮度比。 调整施加到蓝色矩阵的亮度信号或色度信号的电平影响控制信号,该控制信号又调整所述色度与亮度比以进行补偿,从而导致红色,绿色和蓝色信号的电平偏移 由RGB矩阵输出以改变彩色图像的饱和度。