Video, signal processing, image storing, encoding and decoding techniques are used for time-share analog switching and splicing of multi-channel video signals.

本发明采用视频技术、信号处理技术、图象存贮技术及编解码技术等对多路视频信号作时分模拟切换与拼接。

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Also, a large frequency spectrum (698-806 MHz) was freed by switching over from analog TV to the digital one.

此外，从模拟电视信号到数字电视信号的切换也释放了广阔的频道(698 - 806mhz)。

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Install electromechanical, analog and digital trunking systems, circuits and equipment in telecommunications central offices and switching centres.

在电信中心办公室和交换中心安装工机电，模拟和数字集群系统，电路和设备。

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