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GUO HONGSHENG, CHEN JUNLIANG. 1989: REAL-TIME SEISMIC WAVE DATA COMPRESSION METHODS. Acta Seismologica Sinica, 11(1): 68-80.
Citation: GUO HONGSHENG, CHEN JUNLIANG. 1989: REAL-TIME SEISMIC WAVE DATA COMPRESSION METHODS. Acta Seismologica Sinica, 11(1): 68-80.
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REAL-TIME SEISMIC WAVE DATA COMPRESSION METHODS

  • Institute of Geophiscs, State Seisrnological Bureau

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  • Published Date: September 01, 2011
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  • This paper discusses two methods of compressing real-time seismic wave data: Self-Adaptive Sampling (SAS) method and 8-bit Adaptive Differential Pulse Code Modulation (8-bit ADPCM) method. The SAS compresses seismic data with changeable compression ratios for different seismic events that have different frequency properties. The 8-bit ADPCM method is used to compress SAS data with a constand compression factor of 2:1. With the joint application of both methods,high compression ratios and high fidelity are achieved simultaneously,the distortion being negligible. The compression ratios are larger than 12 for Short-Period seismic data,30 for broadband,and 10 for long-period. A high waveform coincidence was achieved not only in the time domain in which waveform cross-correlation coefficients are over 0.997 but also in the frequency domain. Easy in algorithm,those two methods can be applied in highspeed system for seismic data acquisition and transmission. Now,SAS has been used in Basic Seismic Observatory (BSO) developed by the Institute of Geophysics,State Seismological Bureau of China.
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    • References (1)
  • [1] 傅祖芸,1984.信息论基础,中国科技大学研究生院.

    [2] Wood, L. C., 1974. Seismic data compression methods. Geophysics, 39, 8, 499——525.

    [3] Kanjo, K., Kasahara J. and Takahashi, M., 1983. An application of the adaptive differential PCM(ADPCM)method to the seismic wave signal compression. Bull. Earthq. Rcr. Irzst., Tokyo Univ., 58, 647——654.

    [4] Junzo Kasahara, Masayoshi Takahashi, 1985. Massstorage digital ocean bottom seismometer and hydrophone (DOBSH) controlled by micro——processors using ADPCM voice synthesizing. Bull. Earthq. Res, Inst., 60, 23——37.

    [5] 陈俊良,1983.宽频带测震学的若干问题.地震地磁观测与研究,4,1: 7——22,

    [1] 傅祖芸,1984.信息论基础,中国科技大学研究生院.

    [2] Wood, L. C., 1974. Seismic data compression methods. Geophysics, 39, 8, 499——525.

    [3] Kanjo, K., Kasahara J. and Takahashi, M., 1983. An application of the adaptive differential PCM(ADPCM)method to the seismic wave signal compression. Bull. Earthq. Rcr. Irzst., Tokyo Univ., 58, 647——654.

    [4] Junzo Kasahara, Masayoshi Takahashi, 1985. Massstorage digital ocean bottom seismometer and hydrophone (DOBSH) controlled by micro——processors using ADPCM voice synthesizing. Bull. Earthq. Res, Inst., 60, 23——37.

    [5] 陈俊良,1983.宽频带测震学的若干问题.地震地磁观测与研究,4,1: 7——22,
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