在电视直播中 ,导演与摄像之间需经常进行通讯 ,以便能及时将导演意图传达给每个摄像师 ,通讯对于各类晚会的现场直播或多机切换的现场节目制作都是必需的。在通讯系统中有两种信号 ,一种是回监图像信号 ,一种是通话声音信号 ,两者缺一不可。对于回监图像信号的传送 ,目前一般 In the television broadcast, frequent communication between the director and the camera is required so that the director’s intention can be communicated to each cameraman in a timely manner. The communication is necessary for live program production of various party live broadcasts or multi-camera switching. There are two kinds of signals in the communication system, one is back to monitor the image signal, one is to call the sound signal, the two are indispensable. For the return of the monitoring image signal transmission, the current general