在现行的彩色电视系统中,为了满足兼容要求和节约频带,通常传送一个反映物体亮度信息的亮度信号和反映物体色度信息的两个色差信号,并利用频谱交错原理,将这三个信号在同一个频带内传送.这样,在同一个频带内的亮度信号与色度信号必然会互相干扰.为了尽可能地减少这种干扰,根据人眼对彩色细节分辨力比较低的生理特点,对两个色差信号的频带进行压缩,实行窄带传送,而仅仅对亮度信号实行宽带传送。一般色差信号带 In the current color television system, in order to meet the compatibility requirements and save the frequency band, it usually transmits a luminance signal reflecting the luminance information of the object and two color difference signals reflecting the chrominance information of the object, and utilizes the principle of spectrum interleaving, The same frequency band transmission.Thus, in the same frequency band of the luminance signal and the chrominance signal will inevitably interfere with each other.In order to reduce such interference as much as possible, according to the human eye on the color details of the low resolution of the physiological characteristics of the two The color difference signals are compressed in the frequency band, narrowband transmission is performed, and only the luminance signal is subjected to wideband transmission. General color difference signal band