In the fieldblanking period of transmission line field synchronizing signal, so that the charge, the synchronous scanning, to accurately reproduce the original image.
在行场消隐期间传送行场同步信号，使收、发的扫描同步，以准确地重现原始图像。
2
Considering that there is no valid data in the vertical blanking intervals of the video signal, bulk transfer with one field as a unit is used in the input channel.