The idea of embedded synchronic signal is proposed, which USES the synchronic signal for locating the watermark location.
同时引入了同步信号的思想，利用同步信号和水印序列号定位水印的嵌入位置。
The clock signal provided by Global Positioning System(GPS)is widely used in electric power system for relay protection, SOE (Sequence of Events), fault locating, synchronous sampling and so on.
GPS同步时钟信号已在电力系统的继电保护、事件顺序记录、故障测距、同步采样等诸多领域获得重要运用。
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