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一‘填空:(每空1分共40分) 1、我国标准电视射频信号带宽为_,图像已调波上边带标称值带宽为,伴音信号最大频偏为 2、微分增益对图像质量的影响为_,微分相位对图像质量的影响为_,它们属于_失真。 3、常用的彩条测试信号100/0/75/O,这四个数值的意义是指:_ ,具体的电压值(V,伏)为
A ’fill in the blanks: (1 point for each 40 points in total) 1, China’s standard TV RF signal bandwidth is _, the image has been modulated on the sideband nominal bandwidth, the maximum frequency offset of the audio signal is 2, the differential gain of the image quality The effect is _, and the effect of differential phase on image quality is _, they belong to _distortion. 3, the commonly used color bar test signal 100/0/75 / O, the meaning of these four values refers to: _, the specific voltage value (V, V)