摘要 |
Apparatus and method for performing fast compression and decompression of seismic data. An adaptive transform (124) with selectable mathematical basis is applied to an initial data set to obtain a set of transformed coefficients, the transform factorizing an effective symmetric or non-symmetric biorthogonal filter of size (u, v) into a number m of elementary (3, 1) biorthogonal filters which are applied to the data set in selected directions without requiring transposition of the data set. The coefficients are encoded (126) using non-uniform scalar quantization and run-length coding followed by adaptive coding of resulting threshold coefficients. The transform and encoding steps are repeated (128) using a new mathematical basis for each iteration to obtain a compressed data set at a desired compression rate. Exact compression ratios can be obtained (158), allowing evaluation of the data in the compressed domain as well as transparent, on-the-fly decompression at computer network data transfer rates.
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申请人 |
GEO ENERGY, INC.;FAST MATHEMATICAL ALGORITHMS & HARDWARE CORPORATION;STROEMBERG, JANOLOV;AVERBUCH, AMIR;MEYER, FRANCOIS, G.;VASSILIOU, ANTHONY, A. |
发明人 |
STROEMBERG, JANOLOV;AVERBUCH, AMIR;MEYER, FRANCOIS, G.;VASSILIOU, ANTHONY, A. |