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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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基于ezw算法的地震数据压缩
Keywords: 地震数据压缩,小波变换,mallat算法,ezw编码,算术编码
Abstract:
？地震数据压缩是解决海量地震数据传输及存储的一项关键技术.针对地震数据的特点,选用基于小波变换的适用的地震信号压缩方法,实现了对地震信号的有效压缩.该方法主要包括:对地震信号进行二维小波变换;利用系数之间的相关性对变换后的系数采用嵌入式小波零树编码(ezw)方法重新组织;采用自适应算术编码对量化后的系数进行无损熵编码.试验结果表明,对叠前地震数据压缩4倍时,信噪比可达50db以上,而选用适用小波基对叠后地震数据压缩16倍时,信噪比仍可达30db以上.
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