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公开(公告)号：US3812524A
公开(公告)日：1974-05-21
申请号：US29906372
申请日：1972-10-19
Applicant: MOTOROLA INC
Abstract: A color television receiver is provided with the customary manual controls for permitting a viewer to adjust brightness, contrast, saturation and hue of the image reproduced by the receiver. In addition, preset controls for brightness, contrast, hue and saturation are provided, and a push-button switch is used to select either the manual or preset controls to establish the characteristics of the reproduced image. With the push-button switch set to select the automatic or preset controls, an AND gate is enabled to cause a shift in the color demodulator angles and further to cause the relative gains of the final output amplifiers to be changed to anhance colors in the range of skin tones reproduced by the receiver.
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公开(公告)号：US3789134A
公开(公告)日：1974-01-29
申请号：US3789134D
申请日：1972-10-19
Applicant: MOTOROLA INC
Abstract: A color television receiver is provided with the customary manual controls for permitting a viewer to adjust brightness, contrast, saturation and hue of the image reproduced by the receiver. In addition, preset controls for brightness, contrast, hue and saturation are provided, and a push-button switch is used to select either the manual or preset controls to establish the characteristics of the reproduced image. With the push-button switch set to select the automatic or preset controls, an AND gate is enabled to cause a shift in the color demodulator angles and further to cause the relative gains of the final output amplifiers to be changed to enhance colors in the range of skin tones reproduced by the receiver.
Abstract translation: 为彩色电视接收机提供常规的手动控制，以允许观看者调整由接收机再现的图像的亮度，对比度，饱和度和色调。 此外，还提供了亮度，对比度，色调和饱和度的预设控制，按钮开关用于选择手动或预置控制，以确定再现图像的特性。 当按钮开关设置为选择自动或预设控制时，使能“与”门使颜色解调器角度发生变化，并进一步导致最终输出放大器的相对增益被改变，以增加范围内的颜色 由接收器再现的肤色。
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公开(公告)号：CA930464A
公开(公告)日：1973-07-17
申请号：CA82136
申请日：1970-05-07
Applicant: MOTOROLA INC
IPC: H04N9/64
Abstract: A color television receiver providing for the direct demodulation of the red, blue and green color representative signals includes an additional pair of hue control demodulators for demodulating color difference signals on opposite sides of the I-axis by equal amounts. The outputs of the hue control demodulators are inverted with respect to one another and are supplied to an adder, which provides a DC control voltage indicative of the relative difference in the amplitudes of the signals obtained from the hue control demodulators. This control voltage then is supplied to a DC controlled variable hue control circuit which shifts the relative phase between the color sync oscillator output and the subcarrier to the demodulators by an amount sufficient to maintain the average outputs of the two hue control demodulators equal in amplitude.
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