1. Electronics and Information School, Yangtze University, Jingzhou, Hubei 434023, China;
2. Geophysics and oil resource institute, Yangtze University, Wuhan, Hubei 430100, China
Abstract：Seismic data compression is a key technology to solve the problem of massive seismic data transmission and storage. According to seismic data characteristics, we propose an efficient seismic data compression method based on embedded zero-tree wavelet (EZW) in this paper. The method consists of three steps: A. Original seismic data decomposition into sub-bands of wavelet coefficients with two-dimensional wavelet transform; B. Wavelet coefficient reorganization with zero-tree coding based on the coefficient correlation; C. Lossless entropy encoding of quantified coefficients with adaptive arithmetic coding. Tests of this method show that the signal-to-noise ratio (SNR) can reach 50dB or more when prestack seismic data is compressed at a compression ratio of 4:1, while the SNR can reach 30dB or more when poststack seismic data is compressed at a compression ratio of 16:1.
Tang Xianghong,He Zhenhua,Yang Shaoguo et al. Seismic data compression wavelet transform. Journal of Chengdu University of Technology, 1999,26(2):183-186.
Wang Zhenli,Li Yanda. Seismic data compression using wavelet transform. OGP,1995,30(1):86-90.
[4]
Villasensor J D. Seismic data compression using high-dimensional wavelet transforms. IEEE Proc Data Compression Conference,Snowbird USA,1996.
[5]
Khene M F,Abdul-Jauwad S H. Adaptive seismic compression by wavelet shrinkage. Proceedings of the Tenth IEEE Workshop on Statistical Signal and Array Processing,Snowbird USA,2000.
[6]
Goupilloud P,Grossmann A,Morlet J. Cycle-octave and related transforms in seismic signal analysis. Geology and Exploration,1984,23(1):85-102.
[7]
Kronland-Martinet R. The wavelet transform for analysis,synthesis,and processing of speech and music sounds. Computer Music Journal,1988,12(4):11-20.
[8]
Mallat S G. A theory for multi-resolution signal decomposition:the wavelet representation. IEEE Trans-PAMI,1989,11(7):674-693.
Feng Zhanlin,Zhang Xuegong,Li Yanda. Some practical aspects of seismic data compression based on wavelet transform. Tsinghua Univ (Sci &Tech),2001,41(4 /5):170-173.
Zhang Junhua,Tong Zhaoqi. Quantitative compression of seismic data with wavelet transformation method. Journal of the University of Petroleum,China, 2003,27(5):28-31.
Wang Xizhen. Study on Application of Wavelet Transform in Compressing Seismic Data and Picking the Onset Time of Seismic Phase[D]. Beijing:Instituteof Geophysics,China Earthquake Administration,2004.
Yu Ping,Ma Xiaohu,Chen Hengjin. The encoding algorithm of seismic data compression based on lifting wavelet transform. Journal of Suzhou University (Engineering Science Edition),2009,29(1):7-11.
Luo Bing,Zhou Xianshan. Seismic exploration data compression by wavelet transform. Journal of Jianghan Petroleum University of Staff and Workers. 2002,15(3):27-28.
Wang Xizhen,Teng Yuntian,Qu Baoan et al. Seismic data lossy compression and distortion analysis. Journal of Earthquake Engineering and Engineering Vibration,2011,31(4):175-180.
