In video jargon, the brightness is called the luminance signal , while the color is the chrominance signal .

在电视的专门术语中，光亮叫做亮度信号，当颜色成为电视信号的时候。

The second luminance signal is subtracted from each of the color signals to produce second color difference signals.

从每个彩色信号中减去该第二亮度信号以生成第二色差信号。