地震地磁观测与研究2017，Vol.38Issue(5)：133-138,6.DOI:10.3969/j.issn.1003-3246.2017.05.023
Mallat算法在数字地震信号压缩中的应用
Application of Mallat algorithm in compression of digital seismic signal
摘要
Abstract
Due to such a number of seismographic observation stations, also because of high data collection capacity, daily output data in networks center is very considerable. So researching a compression method of digital seismic datas, improving the efficiency of storage format is very popular in the study of industry. This paper applies the thought of the Mallat algorithm into digital seismic waveform data compression . This article selects different functions for 3 to 5 layers of wavelet decomposition, and selectes diffenert kinds of seismic data for research. We get the details of the wavelet coefficient layered hard threshold algorithm, and then process at the original signal and the signal through wavelet transform by zip at the same time. Compared with the direct zip file of original datas, the proposed method can get a higher compression ratio, the restructure signal is no-distortion. Through this paper, we present the applicable wavelet decomposition function for compression of digital seismic waveform datas and the layer number of wavelet decomposition.关键词
数字地震信号/小波变换/Mallat算法/阈值计/数据压缩Key words
digital seismic signal/wavelet transform/Mallat algorithm/threshold calculation/data compression引用本文复制引用
王军..Mallat算法在数字地震信号压缩中的应用[J].地震地磁观测与研究,2017,38(5):133-138,6.基金项目
中国地震局"监测 预报 科研"三结合课题(项目编号:150901) （项目编号:150901）
