本文从电视信号形成的角度,详细分析了从简单静止图象到复杂运动图象的电视图象信号的频谱结构.由于摄像机采用了扫描的方式将图象变化为图象信号,使得电视图象信号的频谱具有特殊的离散结构.从而为彩色电视技术在展宽频带的情况下,在亮度信号的频带内间插经过处理的色度信号的频谱,实现了彩色电视与黑白电视的兼容. In this paper, we analyze the spectral structure of TV image signal from simple still image to complex moving image in detail from the perspective of television signal formation.As the camera uses the scanning method to change the image into the image signal, the television image The spectrum of the signal has a special discrete structure, so as to expand the frequency band of the luminance signal for the color TV technology, and interpolate the spectrum of the processed chrominance signal in the frequency band of the luminance signal to realize the compatibility of the color television and the black-and-white television.