The present invention can effectively and timely transmit the video format information between the two video communication sides and can switch the video format quickly.
本发明能够即时有效地在视频通讯双方传递视频格式信息，并且能快速切换视频格式。
2
The switch mode regulated power supply using self - adjusting technique is introduced. In TV transmitter, it is used to the large power transmit-ting tubes with variable voltage for cold filament.
The subcircuits consist of the low noise amplifier, RF filter, mixer, driver amplifier, image filter, power amplifier, transmit-receive switch and if filter and so on.