中文说明：应用广义互相关函数估计两个信号之间的时间延迟，包括phat，scot，roth，ml等方法，经过仿真测试，估计结果准确。
English Description：
The generalized cross-correlation function is used to estimate the time delay between two signals, including Phat, scot, Roth, ML and other methods. The simulation results show that the estimation results are accurate.