摘要
文中提出了应用双正交小波变换有损压缩地震数据的方法,该方法具有实现简单、在高压缩比情况下失真小等特点。以信噪比、剩余能量作为评价指标,分析了压缩引起的信号失真。结果表明压缩比在0~31范围内取值时,信噪比较高,剩余能量在99%以上,原始信号与重构信号有很好的相关度。即使在不太理想的情况下,将重构信号用于地震参数快速测定,对震级的计算误差最大为8.6×10-3,震中距的最大计算误差为3.69 km。
This paper presents the seismic data lossy compression method using biorthogonal wavelet transform,which has advantage of easy achievement and small distortion in the case of high compression ratio and so on.The signal distortion caused by compression with the characteristic parameters of seimic events is analyzed.The results show that the calculated maximum magnitude error is 8.6×10-3,and the maximum epicenter distance error is 3.69 km when the compression ratio is in the range of 0~31.
出处
《地震工程与工程振动》
CSCD
北大核心
2011年第4期174-180,共7页
Earthquake Engineering and Engineering Dynamics
基金
地震科研行业专项(200808004)
关键词
地震数据
有损压缩
失真
双正交小波
seismic data
lossy compression
distortion
biorthogonal wavelet
