On designing of the encoder, by using the decoding for video chip SAA7113 made in Philips, analog video signal inputted realizes A/D conversion in analog/power block.

• 编码器的设计中，模拟/电源块主要实现的功能是对输入的模拟视频信号进行A/D转换，解码芯片采用Philips公司SAA7113。