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1. 发明授权

US4520392A Teletext reception indicator 失效
标题翻译：图文电视接收指示灯
公开(公告)号：US4520392A
公开(公告)日：1985-05-28
申请号：US471978
申请日：1983-03-04
申请人： Charles M. Cox , Charles Heuer
发明人： Charles M. Cox , Charles Heuer
IPC分类号： H04N5/445 , H04N7/088 , H04N21/488 , H04N7/04
CPC分类号： H04N21/4888 , H04N5/44513 , H04N7/0882 , H04N5/44504
摘要： An indicator is described for alerting a television viewer to the fact that a teletext signal is being received. In the preferred embodiment, the indicator includes a control which senses the detection of the framing code associated with the received teletext signal to actuate an indicator lamp.
摘要翻译：描述了一个指示器，用于警告电视观看者正在接收图文电视信号的事实。在优选实施例中，指示器包括感测与所接收的图文电视信号相关联的成帧代码的检测以致动指示灯的控制。

2. 发明授权

US4388645A Teletext communication system with timed multipage local memory 失效
标题翻译：具有定时多页本地存储器的图文电视通信系统
公开(公告)号：US4388645A
公开(公告)日：1983-06-14
申请号：US253330
申请日：1981-04-13
申请人： Charles M. Cox , William L. Thomas
发明人： Charles M. Cox , William L. Thomas
IPC分类号： H04N7/088 , H04N7/08
CPC分类号： H04N7/0882
摘要： A teletext communications system comprises a transmitter, e.g. an orbiting satellite, transmitting multiple pages of a teletext encoded data service at selected times of the day, each teletext page including a first non-displayable auxiliary teletext data row defining a selected time interval and a unique page memory address code. The transmitter also continuously transmits a second non-displayable auxiliary teletext data row including a time of day code. A teletext decoder is adapted for acquiring and storing each transmitted teletext page at a page memory defined by said page memory address code and automatically rebroadcasts each of the stored pages for which the stored selected time interval coincides with the transmitted time of day code.
摘要翻译：图文电视通信系统包括发射机，例如轨道卫星，在一天的选定时间传送多页的图文编码数据服务，每个图文电视页包括定义选定的时间间隔的第一不可显示辅助图文电视数据行和唯一的页存储器地址码。发射机还连续地发送包括时间码的第二不可显示辅助图文电视数据行。图文解码器适于在由所述页存储器地址代码定义的页存储器上获取和存储每个发送的图文电视页面，并且自动重播所存储的所选时间间隔与所发送的时间码一致的所存储的页面。

3. 发明授权

US4388639A Color control circuit for teletext-type decoder 失效
标题翻译：图文解码器彩色控制电路
公开(公告)号：US4388639A
公开(公告)日：1983-06-14
申请号：US264773
申请日：1981-05-18
申请人： Charles M. Cox , Rudolf Turner
发明人： Charles M. Cox , Rudolf Turner
IPC分类号： H04N9/64 , H04N9/535
CPC分类号： H04N9/641
摘要： A color control circuit for selectively modifying the red, green and blue color signals developed at the output of a teletext-type decoder comprises a common input stage responsive to the teletext decoder for developing a bi-level control voltage identifying the portions of the color signals representing background and foreground display information. Each color signal is coupled to a respective output stage which causes the associated color signal to assume a first intensity level in response to the control voltage being at its first level and a second intensity level greater than the first intensity level in response to the control voltage being at its second level. As a result, background colors are displayed at a reduced contrast level relative to foreground colors. In addition, selected single color foreground information may be displayed at a further increased intensity level to improve the readability of the display.
摘要翻译：用于选择性地修改在图文电视型解码器的输出处产生的红色，绿色和蓝色信号的颜色控制电路包括一个公共输入级，响应于图文电视解码器，用于开发识别彩色信号部分的双电平控制电压表示背景和前景显示信息。每个颜色信号被耦合到相应的输出级，其响应于控制电压处于其第一电平而使相关联的颜色信号呈现第一强度电平，并且响应于控制电压而使第二强度电平大于第一强度电平处于第二级。结果，背景颜色以相对于前景色的降低的对比度显示。此外，可以以进一步增加的强度水平显示所选择的单色前景信息，以提高显示器的可读性。

4. 发明授权

US4393404A Special services teletext communications system 失效
标题翻译：特别服务图文电讯系统
公开(公告)号：US4393404A
公开(公告)日：1983-07-12
申请号：US238510
申请日：1981-02-26
申请人： Charles M. Cox , William L. Thomas
发明人： Charles M. Cox , William L. Thomas
IPC分类号： H04N7/03 , H04N7/00 , H04N7/08
CPC分类号： H04N7/03
摘要： A teletext communications system includes a transmitter cyclically transmitting a plurality of conventional teletext encoded data rows together with one or more teletext encoded special services data rows. A plurality of teletext decoder equipped receivers are operable for acquiring the conventional teletext rows but not the special services rows. Subscribers to the special services data are provided with data decoders responsive to the cyclical transmissions for acquiring only the special services data rows, the data decoders including apparatus for storing the data encoded in an acquired special services data row and for providing a display of the information represented thereby.
摘要翻译：图文电视通信系统包括发射机与一个或多个图文电视编码的特殊服务数据行一起循环地发送多个传统的图文编码数据行。多个装有图文解码器的接收器可操作用于获取传统的图文电视行而不是特殊业务行。为特殊服务数据订户提供响应于周期性传输的数据解码器，仅用于仅获取特殊服务数据行，数据解码器包括用于存储编码在所获得的专用服务数据行中的数据并用于提供信息的显示的装置由此表示。

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