High-efficiency and high-precision seismic exploration data compression method

Abstract

The invention relates to a high-efficiency and high-precision seismic exploration data compression method in order to solve the problem that the original state of data cannot be maintained due to large compression error in the prior art. According to the method, on the condition that there is almost no loss of data quality, data obtained through 24-bit analog-to-digital conversion on signals acquired by a geophysical prospecting instrument is compressed by 1 / 3, and 24-bit 3-byte data is compressed into 16-bit 2-byte data. On the condition that there is almost no loss of data quality, data, occupying 12 bytes and subject to 24-bit analog-to-digital conversion, of four sampling points is compressed into data occupying 10 bytes. The method comprises the following steps: (1) letting data output by a 24-bit analog-to-digital converter be D24; (2) letting the format of data after compression be 4-bit exponent E4+16-bit mantissa M16; (3) converting 24-bit data into 4-bit exponent E4+16-bit mantissa M16 under the condition of maintaining the sign bit, wherein the value of the exponent E4 is 0-8; and (4) combining the data of the four sampling points into 10 bytes, namely, the exponent of the four sampling points occupies two bytes, and four mantissas occupy eight bytes. The high-efficiency and high-precision seismic exploration data compression method of the invention has the advantage of being small in compression error and capable of keeping the original state of data, realizing high-efficiency and high-precision compression and improving the efficiency of data transmission.

Description

technical field [0001] The invention relates to a detection data compression method, in particular to a high-efficiency and high-precision seismic exploration data compression method. technical background [0002] With the rapid development of electronic technology and sensor technology, the amount of data collected by geophysical instruments has increased sharply. How to reduce the data storage space of the field components of geophysical instruments and improve the efficiency of data transmission has become an urgent need for development. [0003] Scientists have invented many methods for data compression. However, due to the particularity of geophysical data, in order to increase the compression ratio, most of them can only be compressed by data transformation such as Fourier transform and wavelet transform, but there are often relatively large errors. Due to the requirement to keep the original appearance of the data as much as possible during data collection, none of t...

AI Technical Summary

Problems solved by technology

Due to the requirement to keep the original appearance of the data as much as possible during data collection, these data compression methods cannot be used in the data collection stage

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