由于彩色电视能传递更丰富的信息、更生动逼真地反映实际景况,所以深受广大群众的喜欢。彩色电视机所接受的图象信号,是由电视台发射出来的。彩色图象信号,是由红(R)、绿(G)、兰(B)三基色信号合成的。从经济角度考虑,这三种基色信号是用同一套发送设备(通道)发射的。在单一通道中传递三基色信号,可有多种方式。每一种特定的传送方式称为一种“制式”。只有彩色电视机和电视台的制式相同, Because color TV can transmit richer information and vividly reflect the actual situation, it is deeply loved by the masses. Image signals received by color television sets are transmitted by television stations. The color image signal is synthesized from the three primary colors of red (R), green (G), and blue (B). From an economic point of view, these three primary color signals are transmitted by the same set of transmitting equipment (channels). There are many ways to pass three primary color signals in a single channel. Each specific delivery method is called a “standard”. Only the color television and television stations the same format,