SEED格式STEIM2数据压缩算法在实时地震数据传输中的应用  

Application of STEIM2 compression algorithm from SEED in real time seismic waveform data transmission

作　　者：王洪体[1] 陈阳[1] 庄灿涛[1] 

机构地区：[1]中国地震局分析预报中心,中国北京100036

出　　处：《地震地磁观测与研究》2004年第4期14-19,共6页Seismological and Geomagnetic Observation and Research

摘　　要：在一定带宽内,及时、高效、无失真地传输地震数据是地震数据传输的基本要求,SEED格式给出的数据格式在数据压缩方面有其独到之处,但SEED格式没有定义数据正确性和完整性保证机制和检验方法,因而影响实时传输中的使用。本文提出一种基于SEED格式的STEIM2数据压缩算法,同EDAS数据包形式兼容的实时压缩数据包编码方法,来实现实时压缩数据的传输。经理论评估和实际数据检验,它容易实现,效率高,安全,可靠,完全可以应用于实时数据传输。It is the essential requirement to transmit real-time seismic data in a certain bandwidth with efficiency and not distortion. The Steim2 Compression Algorithm used in SEED is good for seismic waveform data compression, but SEED doesn't define methods for verifying of data correction and completeness, so may not be used in real-time data transmission directly. In this paper we propose a scheme for real-time waveform data transmission with STEIM2 Compression Algorithrn, it uses same frame structure as the standard EDAS data frame. By theoretic analysis and test with practical data, it is efficient, safe, reliable, and easily in im-plementation, so it is available in real time seismic data transmission.

关 键 词：SEED STEIM2 数据压缩 实时传输 帧 

分 类 号：P315.61[天文地球—地震学]