物探化探计算技术2025，Vol.47Issue(5)：656-669,14.DOI:10.12474/wthtjs.20240529-0001
叠前地震数据哈特莱域四进制EZW压缩方法
Prestack seismic data compression technology based on quaternary EZW algorithm in the Hartley domain
闫海洋 1徐朝红 1刘昭 1霍丽娜 1朱兴卉 1罗敏学 1毛贺江 1葛婧艳 1刘静娈1
作者信息
- 1. 中国石油东方地球物理公司海洋物探分公司,天津 300457
- 折叠
摘要
Abstract
With the improvement of acquisition efficiency,the amount of seismic data is increasing exponentially.It is challenging to process massive seismic data on board.The transmission of massive data also faces severe problems due to the limitation of network bandwidth.Seismic data compression technology with high fidelity and high compression ratio is needed to meet the needs of quality control and fast track.The compression ratio should be improved while meeting the requirements of a high signal-to-noise ratio.Transform coding is mainly studied in two aspects:sparse transform and quantization coding.The embedded zerotree wavelet(EZW)algorithm has superior compression performance.This paper proposes a novel approach combining 2D-DHT(Discrete Hartley Transform)and DWT(Discrete Wavelet Transform).Unlike EZW encoding in the t-x domain,this paper utilizes the sparsity of the Hartley domain and the multi-resolution characteristics of the wavelet transform for EZW encoding.To improve the efficiency of quantization encoding,a quaternary encoding algorithm is proposed,which reduces the number of encoding iterations in the main scan,resulting in improved computational efficiency and data compression performance.Synthetic and field data experiments have shown that the compression performance of the proposed algorithm is better than that of the conventional EZW algorithm.关键词
数据压缩/小波变换/四进制/EZW/哈特莱变换Key words
data compression/wavelet transform/quaternary/EZW/Hartley transform分类
天文与地球科学引用本文复制引用
闫海洋,徐朝红,刘昭,霍丽娜,朱兴卉,罗敏学,毛贺江,葛婧艳,刘静娈..叠前地震数据哈特莱域四进制EZW压缩方法[J].物探化探计算技术,2025,47(5):656-669,14.
