公开(公告)号：US4296435A

公开(公告)日：1981-10-20

申请号：US179142

申请日：1980-08-18

申请人： Alain H. d'Hautecourt ,  Wayne E. Bretl ,  Ronald B. Lee

发明人： Alain H. d'Hautecourt ,  Wayne E. Bretl ,  Ronald B. Lee

IPC分类号： H04N5/208 ,  H04N5/14

CPC分类号： H04N5/208

摘要： A luminance signal processing circuit for a television receiver comprises means for separating a full bandwidth luminance signal into a low pass component and first and second derivative components of the low pass component. A differential amplifier is responsive to the component voltage signals for developing first and second current mode signals representing in phase and 180.degree. out of phase combinations of the low pass and second derivative components. The levels of the second derivative components of the first and second current mode signals are selectively adjusted by a peaking signal processor for developing related third and fourth current mode signals whose amplitudes are also selectively adjusted by a picture signal processor for developing an output luminance voltage having selectively controlled contrast and peaking components. A peak white limiter is responsive to white going portions of the second derivative components of the third and fourth current mode signals for automatically causing a corresponding reduction in the level of the output luminance voltage. Finally, a single supply of DC potential is coupled to the picture signal processor for supplying the bias energy from which the first, second, third and fourth current mode signals are derived.

摘要翻译： 一种用于电视接收机的亮度信号处理电路，包括用于将全带宽亮度信号分离成低通分量的低通分量和低通分量的第一和第二导数分量的装置。 差分放大器响应于分量电压信号，用于开发表示低通和二阶导数分量的同相和180°异相组合的第一和第二电流模式信号。 第一和第二电流模式信号的二阶导数分量的电平由峰值信号处理器选择性地调节，用于开发相关的第三和第四电流模式信号，其幅度也被图像信号处理器选择性地调整，以便开发具有 选择性地控制对比度和峰值部件。 峰值白限制器响应于第三和第四电流模式信号的二次导数分量的白色部分，以自动地使输出亮度电压的电平相应降低。 最后，单电源电压耦合到图像信号处理器，用于提供源于第一，第二，第三和第四电流模式信号的偏置能量。

公开(公告)号：US4348695A

公开(公告)日：1982-09-07

申请号：US205824

申请日：1980-11-10

申请人： Alain H. d'Hautecourt

发明人： Alain H. d'Hautecourt

IPC分类号： H04N5/21 ,  H04N5/14

CPC分类号： H04N5/21

摘要： An AC signal processing circuit fabricated on a single integrated circuit chip used in a television receiver is both defeated and the DC level characterizing its output terminal is controlled in response to a manually operable switch communicating with a single input pin of the chip. A control circuit comprising a pair of differential amplifiers fabricated on the chip is responsive to the switch for enabling the AC signal processing circuit or, alternatively, for inhibiting the circuit while simultaneously causing its output to assume a controlled DC level.

摘要翻译： 在电视接收机中使用的单个集成电路芯片上制造的AC信号处理电路被击败，并且响应于与芯片的单个输入引脚通信的可手动操作的开关来控制表征其输出端子的DC电平。 包括在芯片上制造的一对差分放大器的控制电路响应于开关以使能AC信号处理电路，或者替代地，用于禁止电路，同时使其输出呈现受控的DC电平。

公开(公告)号：US4338624A

公开(公告)日：1982-07-06

申请号：US222476

申请日：1981-01-05

申请人： Alain H. d'Hautecourt ,  George J. Tzakis

发明人： Alain H. d'Hautecourt ,  George J. Tzakis

IPC分类号： H04N9/64 ,  H04N9/535

CPC分类号： H04N9/641

摘要： A television receiver includes an interface circuit enabling the production of on-screen displays of alpha-numeric type information in a selected color. The interface circuit is responsive to a blanking signal for reducing the red, green and blue video signals developed in response to a received NTSC color television signal below the blanking level of the television receiver. A digital signal representing selected alpha-numeric type information is coupled from a character generator to the interface circuit for increasing the potential at one or more of the electron guns of the receiver for producing a corresponding on-screen display in a selected color.

摘要翻译： 电视接收机包括一个接口电路，该接口电路能够产生所选择的颜色的字母数字型信息的屏幕显示。 接口电路响应于消隐信号以减少响应于低于电视接收机的消隐电平的接收的NTSC彩色电视信号而产生的红色，绿色和蓝色视频信号。 表示所选择的字母数字型信息的数字信号从字符发生器耦合到接口电路，用于增加接收机的一个或多个电子枪的电位，以产生所选颜色的对应的屏幕显示。