地震数据采集系统中的数据压缩与FPGA实现  

Data Compression and FPGA Implementation in Seismic Data Acquisition System

作　　者：李可寒 杨俊峰 宋克柱[1,2] LI Kehan;YANG Junfeng;SONG Kezhu(State Key Laboratory of Particle Detection and Electronics,University of Science and Technology of China,Hefei,230026,China;Department of Modern Physics,University of Science and Technology of China,Hefei,230026,China)

机构地区：[1]中国科学技术大学核探测与核电子学国家重点实验室,合肥230026 [2]中国科学技术大学近代物理系,合肥230026

出　　处：《数据采集与处理》2020年第4期753-761,共9页Journal of Data Acquisition and Processing

基　　金：国家重点研发计划(2016YFC0303200)资助项目。

摘　　要：实现了一种地震数据采集系统中的数据压缩算法,用于提升采集系统的数据传输效率,从而提高了海洋地震勘探的精度和深度。压缩针对地震数据流,比现有的地震数据压缩算法更容易在FPGA上实现。同时考虑到地震波的物理特征,借鉴语音压缩算法,实现了一种易于用FPGA实现的24位地震数据流无损压缩算法,平均能将采集的地震数据压缩至原始数据大小的54%。A data compression algorithm in seismic data acquisition system is implemented to improve the data transmission efficiency of the acquisition system,which improves the accuracy and depth of marine seismic exploration.This compression is aimed at seismic data stream,which is easier to implement on FPGA than the existing seismic data compression algorithms.Considering the physical characteristics of seismic wave and using the speech compression algorithm for reference,a lossless compression algorithm for 24-bit seismic data stream,which is easy to be implemented on FPGA,is implemented.On average,the collected seismic data can be compressed to 54%of the original data size.

关 键 词：数据压缩 无损压缩 数据流压缩 24位地震数据 现场可编程门阵列 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]