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在地震数据处理过程中,应用时频分析技术可同时观察信号在时间域和频率域内的变化状态,并提供地震信号的局部时频特征,因而该技术现已广泛应用于数据压缩、降噪、检测、能量补偿等处理目的。本文首先对时频分析技术的起源和原理作了简要描述;然后对STFT、WT和S变换三种方法及其优缺点进行了分析;最后,对时频分析技术在地震波特征量提取方面的部分应用进行了探讨。
In the process of seismic data processing, the application of time-frequency analysis technology can simultaneously observe the signal changes in the time and frequency domains and provide local time-frequency characteristics of seismic signals. Therefore, the technology has been widely used in data compression, noise reduction, Detection, energy compensation and other processing purposes. In this paper, firstly, the origin and principle of time-frequency analysis technique are briefly described. Then the three methods of STFT, WT and S transformation are analyzed and their advantages and disadvantages are analyzed. Finally, the part of the time- Application is discussed.