在UNIX系统中，jiffy主要表示两个连续时钟计时单元之间的时间。
In UNIX systems, a jiffy is basically the time between two consecutive clock ticks.
数据读取连续的驱动ic的输入时钟的上升沿一旦机顶盒输入线变低。
Data is read serially by the Driver IC on the input CLK rising edge once the STB input line goes low.
该算法利用连续两次同步过程中所记录的时间信息来估算节点时钟的偏移和频率漂移率，并进行补偿。
The clock offset and frequency drift rate for sensor nodes are estimated and then compensated by using the time-stamp recorded in two adjacent synchronizations.
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