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

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.