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为利用低成本UTP双绞线实现高清VGA模拟视频信号的远距离传输,完成了VGA模拟差分信号的远距离传输系统的设计及实现。在发送端,通过差分驱动芯片AD8147对信号进行驱动;在接收端,采用差分接收和均衡器AD8123芯片对信号进行均衡和补偿,恢复原始视频信号。实验证明,该系统可以在CAT-5e类UTP双绞线上实现最大距离300m、720P分辨率的高清VGA模拟视频信号的远距离传输,传输后的视频图像清晰、色彩饱满。
In order to realize the long-distance transmission of the HD VGA analog video signal by using the low-cost UTP twisted pair, the design and implementation of the long-distance transmission system of the VGA analog differential signal are completed. At the transmitting end, the signal is driven by the differential driver chip AD8147; at the receiving end, the signal is equalized and compensated by the AD8123 differential receiving and equalizing chip to restore the original video signal. The experiment proves that the system can realize the long-distance transmission of the HD VGA analog video signal with the maximum distance of 300m and the resolution of 720P on the CAT-5e UTP twisted pair cable. The transmitted video image is clear and the color is full.