传统的视频线，包括VGA和复合视频线，只能传输模拟视频信号。

The traditional video cables, including VGA and Composite video, transmit analog video signals only.

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这种模拟视频信号必须要经过AD转换后，才能成为平板显示器的输入信号。

Before acting as the input signal of panel monitor, the analog signal must be processed by AD conversion.

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介绍了模拟视频信号防拷贝技术的实现方法，并对技术的各项指标进行了详细的分析。

This paper introduces the method of analog video copy protection and detail analysis of indices for this technique.

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