设计选用PCI多媒体接口芯片SAA7146A，方便的实现了与视频编码器、视频解码器和音频编解码器的连接。

It USES the PCI interface chip SAA7146A special for media processing produced by Philips, and connects simply with video encoder, video decoder, audio encoder and decoder.

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虽然当前计算机显卡视频处理芯片中一般都有支持平板显示器的数字视频接口，但现在大部分的计算机显卡的输出仍然只提供模拟信号接口。

Video-process chips on display adapters always have the digital interface which can support the panel monitor, the output port of most of display adapters only offer the analog signal interface.

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介绍了可编程视频输入编码芯片SAA7111和可编程视频解码输出芯片SAA7185工作原理和接口电路设计。

Introduces operation principle and interface circuit design of Video Input Processor SAA7111 and Video Output Processor SAA7185.

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