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1-1.在彩色电视接收机解码电路中,彩色电视全信号中的亮度信号和色度信号是采用什么方法予以分离的?为什么可以允许这样做? 答:采用频带选择方法,可将彩色电视全信号中的亮度信号和色度信号予以分离.具体地说,当彩色全信号通过副载波陷波器,【滤除色度信号的大部分能量后,余下的便可作为亮度信号使用;当彩色全信号通过色度带通滤波器,滤除通频带以外的亮度信号大部
1-1. In the color TV receiver decoding circuit, the color television signal in full brightness signal and chrominance signal is used in what way to be separated? Why can do this? A: The use of band selection method, the color TV Specifically, when the full color signal passes through the subcarrier notch filter, most of the energy of the chrominance signal is filtered out, and the rest can be used as the luminance signal. When the full color signal passes through the subcarrier notch filter, The full color signal passes through the chroma band pass filter to filter out most of the luminance signal outside of the pass band