Nowadays, with the continuous development of science and technology, multimedia conferencing technology has become very developed, but it is believed that multimedia conferencing still exists. A very common problem is signal interference. This problem occurs when a general video signal is transmitted over a cable.
Let us first look at the reasons for this phenomenon. The transmission frequency of the inner video cable is generally between 0-6 MHz. The image on our monitor is transmitted to the recorder through the transmission cable after the front camera captures the data, and then passes through the matrix monitor. The picture is displayed, so that the transmission process of multiple links is inevitably interfered by other signals in several steps. This signal mainly comes from the interference of electromagnetic radiation, which is generally generated by the electromagnetic radiation generated by the nearby high-voltage line power supply.
In the few seconds after the inverter motor is turned on, low-frequency electromagnetic radiation will be generated. The effect of this radiation is very strong. When we are hungry, the video transmission signal in the nearby video transmission cable will be disturbed, and then it will be The ability to generate cable radiation in video transmission directly leads to a reduction in radiation resistance. Because these low-frequency radiation can easily penetrate the video cable shield, it is easy to interfere with the video transmission, and the interference is already strong when it is transmitted to the recorder.
The danger of electromagnetic radiation has now become stronger and stronger. Basically all electromagnetic interference is concentrated in the 40 MHz band, so the interference during transmission is not huge. Now the transmission distance will affect the strength of the transmission quotation marks, or sometimes it will encounter the non-standard condition of the transmission network connector connection cable, which will also cause the network impedance mismatch. If the reflected signal is superimposed on the original video signal, it is a phenomenon of ghosting when displayed on the display. Caused a lot of inconvenience.
Nowadays, the world has begun to develop a new anti-interference conference system. This technology combines the audio pickup technology to represent the most advanced science and technology. Now such technology is gradually being applied to the video transmission field in China. To the design of anti-interference multimedia conference products.
Nowadays, in the market, in addition to various preventive measures and remedial measures for the interference signal waist, the so-called preventive measure is that the signal interference can be felt during the video image transmission process, and then the phase tube method is performed at this time. Improvement, we must pay attention to the effects of compensation transmission and distortion in this process, we must always maintain the original characteristics of the signal, so that the image can be clearly expressed.
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