CN104749633A - High-efficiency and high-precision seismic exploration data compression method - Google Patents
High-efficiency and high-precision seismic exploration data compression method Download PDFInfo
- Publication number
- CN104749633A CN104749633A CN201310723817.7A CN201310723817A CN104749633A CN 104749633 A CN104749633 A CN 104749633A CN 201310723817 A CN201310723817 A CN 201310723817A CN 104749633 A CN104749633 A CN 104749633A
- Authority
- CN
- China
- Prior art keywords
- data
- bit
- compression
- exponent
- mantissa
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
The present invention is a kind of detection data compression method, particularly relates to a kind of high-efficiency high-accuracy seismic exploration data compression method.
Technical background
Along with the fast development of electronic technology and sensor technology, the data volume of geophysical instrument collection sharply increases, and how to reduce the data space of geophysical instrument field parts, improves data transmission efficiency and become problem in the urgent need to development.
For data compression problem, scientist has invented a variety of method.But due to the singularity of geophysical data, improve ratio of compression, major part can only be compressed by the form of the such as data transformation such as Fourier transform, wavelet transformation, but often has larger error.Owing to requiring to keep data original appearance during data acquisition as far as possible, these data compression scheme all can not be used for data acquisition phase.
Find suitable data compression method to have very great significance to the performance tool improving geophysical instrument.
Summary of the invention
The object of the invention is the above-mentioned defect overcoming prior art, a kind of high-efficiency high-accuracy seismic exploration data compression method is provided, namely for carrying out the method for high-efficiency high-accuracy compression in geophysical instrument to image data, geophysical instrument and other occasions can be widely used in, be conducive to the data space, the raising data transmission efficiency that reduce geophysical instrument field parts.
For achieving the above object, high-efficiency high-accuracy seismic exploration data compression method of the present invention is when lost data quality hardly, to the data volume of the data compression 1/3 of the signal gathered in geophysical instrument after 24 analog to digital conversion, 24 3 byte data boil down tos, 16 2 byte datas.For carrying out Efficient Compression to the data of the signal gathered in geophysical instrument after 24 analog to digital conversion, the data transmission burden of lowering apparatus field parts and data space, improve data transmission efficiency.There is compressed error little, data original appearance can be kept, realize high-efficiency high-accuracy compression, geophysical instrument and other occasions can be widely used in, be conducive to reducing the data space of geophysical instrument field parts, improving the advantage of data transmission efficiency.
As optimization, described 24 analog to digital conversion (or analog to digital converter) precision is 19 ~ 20, after 4 ~ 5 noises being analog to digital converter and peripheral circuit itself and being formed.
As optimization, described 24 analog to digital conversion (or analog to digital converter) precision is 20 precision, and first set 20 bit data as 120, the data that can express are-524288 ~+524287;
After set 16 bit data after compression as D16; Wherein 3 is index E, and 1 is sign bit S, and 12 is mantissa M; The data that can express are-524288 ~+524160;
Again 20 bit data D20 be converted to when stet position 3 exponent E, 1 add 12 mantissa M for sign bit S, the value of exponent E is 0 ~ 7, that is:
First calculate 20 bit data D20 high positions and have E 0 (except sign bit), and when having E>7, E=7;
Then, the character position of data to be moved to left E position in sign bit S, D20 data, intercept a high position (left side) 12 (not comprising sign bit) for D24 data as 12 mantissa M.Have and can realize high-efficiency high-accuracy compression, geophysical instrument and other occasions can be widely used in, be conducive to the data space, the raising data transmission efficiency advantage that reduce geophysical instrument field parts.
As optimization, when E >=7, the data after compression do not have error; As E4<7, compressed error <1/4096.
As optimization, adopt same method, can compress 2 binary data of not isotopic number.
As optimization, the dynamic range of 120dB can be kept completely, reach the technical requirement of current geophysical instrument.
High-efficiency high-accuracy seismic exploration data compression method of the present invention is when lost data quality hardly, 4 sampled points take 12 bytes after 24 analog to digital conversion data compression become to take the data of 10 bytes, adopt following steps:
1. set the data of 24 analog to digital converters outputs as D24;
2. set data layout after compression as 4 exponent E4+16 position mantissa M16;
3. 24 bit data are converted to 4 exponent E4 when stet position and add 16 mantissa M16, the value of exponent E4 is 0 ~ 8, that is:
First calculate 24 bit data D24 high positions and have E4 individual 0, and when having E4>8, E4=8;
Then, D24 data move to left E4 position, intercept a high position (left side) 16 (comprising sign bit) for D24 data as 16 mantissa M16;
4. 4 sampling numbers certificates are combined into 10 bytes, namely the exponent of 4 sampling points takies 2 bytes, and 4 mantissa take 8 bytes.There is compressed error little, data original appearance can be kept, realize high-efficiency high-accuracy compression, geophysical instrument and other occasions can be widely used in, be conducive to the data space, the raising data transmission efficiency advantage that reduce geophysical instrument field parts.
As optimization, when E4 >=8, the data after compression do not have error; As E4<8, compressed error <1/32768.
As optimization, adopt same method, can compress 2 binary data of not isotopic number, the technical requirement of current geophysical instrument can be reached completely.
High-efficiency high-accuracy seismic exploration data compression method of the present invention, is characterized in that adopting following steps:
1. set the data of 24 analog to digital converters outputs as D24;
2. set data layout after compression as 3 exponent E3+1 bit sign position S1+16 position mantissa M16;
3. 24 bit data are converted to 3 exponent E3+1 bit sign position S1+16 position mantissa M16, the value of exponent E3 is 0 ~ 7, that is:
First calculate 24 bit data D24 high positions and have E3 individual 0, and when having E3>7, E3=7;
Then, the character position of data to be moved to left E3 position in sign bit S1, D24 data, intercept a high position (left side) 16 (not comprising sign bit) for D24 data as 16 mantissa M16.
4. 4 groups of samples are synthesized 10 bytes, namely the exponent E3+ sign bit S1 of 4 sampling points takies 2 bytes, and 4 mantissa take 8 bytes.Have and can realize high-efficiency high-accuracy compression, geophysical instrument and other occasions can be widely used in, be conducive to the data space, the raising data transmission efficiency advantage that reduce geophysical instrument field parts.
As optimization, when E4 >=7, the data after compression do not have error; As E4<7, compressed error <1/65536.
As optimization, adopt same principle, can compress 2 binary data of not isotopic number.
As optimization, the dynamic range of 132dB can be kept completely, reach the technical requirement of current geophysical instrument.
After adopting technique scheme, high-efficiency high-accuracy seismic exploration data compression method of the present invention is used for carrying out Efficient Compression to the data of the signal gathered in geophysical instrument after 24 analog to digital conversion, the data transmission burden of lowering apparatus field parts and data space, improve data transmission efficiency; There is compressed error little, data original appearance can be kept, realize high-efficiency high-accuracy compression, geophysical instrument and other occasions can be widely used in, be conducive to the data space, the raising data transmission efficiency advantage that reduce geophysical instrument field parts.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of high-efficiency high-accuracy seismic exploration data compression method of the present invention;
Fig. 2 be actual seismic data data compression before and after comparison diagram, a) be wherein raw data b) for using data c after this method compression) poor d) for difference data is expanded the display result after 100000 times under identical display gain;
Fig. 3 is error result figure after the data compression shown by Fig. 2.
Embodiment
As shown in the figure, the data of signal after 24 analog to digital conversion that high-efficiency high-accuracy seismic exploration data compression method of the present invention is used for gathering in geophysical instrument carry out Efficient Compression.Be when lost data quality hardly, namely the data volume of compression 1/3 is 16 (2 byte) data 24 (3 byte) data compressions.For carrying out Efficient Compression to the data of the signal gathered in geophysical instrument after 24 analog to digital conversion, the data space of lowering apparatus field parts, raising data transmission efficiency, concrete grammar is as follows:
1. the precision of current 24 analog to digital converters can only reach 19 ~ 20, after 4 ~ 5 noises being generally analog to digital converter and peripheral circuit itself and being formed.We suppose that the precision of 24 analog to digital converters is 20 precision here, if 20 bit data are D20, the data that can express are-524288 ~+524287.
2. set 16 bit data after compression as D16.Wherein 3 is index E, and 1 is sign bit S, and 12 is mantissa M.The data that can express are-524288 ~+524160.
3. 20 bit data D20 be converted to when stet position 3 exponent E, 1 add 12 mantissa M for sign bit S, the value of exponent E is 0 ~ 7, that is:
First calculate 20 bit data D20 high positions and have E 0 (except sign bit), and when having E>7, E=7;
Then, the character position of data to be moved to left E position in sign bit S, D20 data, intercept a high position (left side) 12 (not comprising sign bit) for D24 data as 12 mantissa M.
High-efficiency high-accuracy data compression method of the present invention is when E >=7, and the data after compression do not have error; As E4<7, compressed error <1/4096.
High-efficiency high-accuracy data compression method of the present invention adopts same principle, can compress 2 binary data of not isotopic number.
High-efficiency high-accuracy data compression method of the present invention can keep the dynamic range of 120dB completely, reaches the technical requirement of current geophysical instrument.
Example 1: for 20 bit binary data+1111111111111111111 (this is maximum error situation), after compression, index E is 0, sign bit S remains unchanged, and mantissa M is 111111111111, and the data after date restoring are+1111111111110000000.Compressed error is 111/1111111111111111111=127/524287 ≌ 1/4128.
Example 2: for 20 bit binary data+0000000111111111111, after compression, index E is 7, and sign bit S remains unchanged, and mantissa is 111111111111, and the data after date restoring are+0000000111111111111.Compressed error is 0, does not have error.
For carrying out Efficient Compression to the data of the signal gathered in geophysical instrument after 24 analog to digital conversion, the data transmission burden of lowering apparatus field parts and data space, improve data transmission efficiency; There is compressed error little, data original appearance can be kept, realize high-efficiency high-accuracy compression, geophysical instrument and other occasions can be widely used in, be conducive to the data space, the raising data transmission efficiency advantage that reduce geophysical instrument field parts.
The present invention's another kind of high-efficiency high-accuracy seismic exploration data compression method is when lost data quality hardly, 4 sampled points take 12 bytes after 24 analog to digital conversion data compression become to take the data of 10 bytes, adopt following steps:
1. set the data of 24 analog to digital converters outputs as D24;
2. set data layout after compression as 4 exponent E4+16 position mantissa M16;
3. 24 bit data are converted to 4 exponent E4 when stet position and add 16 mantissa M16, the value of exponent E4 is 0 ~ 8, that is:
First calculate 24 bit data D24 high positions and have E4 individual 0, and when having E4>8, E4=8;
Then, D24 data move to left E4 position, and 16, the high-order left side intercepting D24 data comprises sign bit as 16 mantissa M16;
4. 4 sampling numbers certificates are combined into 10 bytes, namely the exponent of 4 sampling points takies 2 bytes, and 4 mantissa take 8 bytes.
When E4 >=8, the data after compression do not have error; As E4<8, compressed error <1/32768.
The present invention also has a kind of high-efficiency high-accuracy seismic exploration data compression method to be adopt following steps:
1. set the data of 24 analog to digital converters outputs as D24;
2. set data layout after compression as 3 exponent E3+1 bit sign position S1+16 position mantissa M16;
3. 24 bit data are converted to 3 exponent E3+1 bit sign position S1+16 position mantissa M16, the value of exponent E3 is 0 ~ 7, that is:
First calculate 24 bit data D24 high positions and have E3 individual 0, and when having E3>7, E3=7;
Then, the character position of data to be moved to left E3 position in sign bit S1, D24 data, 16, the high-order left side intercepting D24 data does not comprise sign bit as 16 mantissa M16;
4. 4 groups of samples are synthesized 10 bytes, namely the exponent E3+ sign bit S1 of 4 sampling points takies 2 bytes, and 4 mantissa take 8 bytes.
When E4 >=7, the data after compression do not have error; As E4<7, compressed error <1/65536.
There is compressed error little, data original appearance can be kept, realize high-efficiency high-accuracy compression, geophysical instrument and other occasions can be widely used in, be conducive to the data space, the raising data transmission efficiency advantage that reduce geophysical instrument field parts.
Claims (10)
1. a high-efficiency high-accuracy seismic exploration data compression method, it is characterized in that when lost data quality hardly, to the data volume of the data compression 1/3 of the signal gathered in geophysical instrument after 24 analog to digital conversion, 24 3 byte data boil down tos, 16 2 byte datas.
2. method according to claim 1, is characterized in that described 24 A/D conversion accuracies are 19 ~ 20, after 4 ~ 5 noises being analog to digital converter and peripheral circuit itself and being formed.
3. method according to claim 2, it is characterized in that described 24 A/D conversion accuracies are 20 precision, first set 20 bit data as D20, the data that can express are-524288 ~+524287;
After set 16 bit data after compression as D16; Wherein 3 is index E, and 1 is sign bit S, and 12 is mantissa M; The data that can express are-524288 ~+524160;
Again 20 bit data D20 be converted to when stet position 3 exponent E, 1 add 12 mantissa M for sign bit S, the value of exponent E is 0 ~ 7, that is:
First calculate 20 bit data D20 high positions to have except E 0 sign bit, and when having E>7, E=7;
Then, the character position of data to be moved to left E position in sign bit S, D20 data, 12, the high-order left side intercepting D24 data does not comprise sign bit as 12 mantissa M.
4. method according to claim 3, is characterized in that, when E >=7, the data after compression do not have error; As E4<7, compressed error <1/4096.
5. method according to claims 1 or 2 or 3, is characterized in that adopting same method, compresses 2 binary data of not isotopic number.
6. method according to claim 1, is characterized in that the dynamic range keeping 120dB, reaches the technical requirement of current geophysical instrument.
7. a high-efficiency high-accuracy seismic exploration data compression method, it is characterized in that when lost data quality hardly, 4 sampled points take 12 bytes after 24 analog to digital conversion data compression become to take the data of 10 bytes, adopt following steps:
1. set the data of 24 analog to digital converters outputs as D24;
2. set data layout after compression as 4 exponent E4+16 position mantissa M16;
3. 24 bit data are converted to 4 exponent E4 when stet position and add 16 mantissa M16, the value of exponent E4 is 0 ~ 8, that is:
First calculate 24 bit data D24 high positions and have E4 individual 0, and when having E4>8, E4=8;
Then, D24 data move to left E4 position, and 16, the high-order left side intercepting D24 data comprises sign bit as 16 mantissa M16;
4. 4 sampling numbers certificates are combined into 10 bytes, namely the exponent of 4 sampling points takies 2 bytes, and 4 mantissa take 8 bytes.
8. method according to claim 7, is characterized in that, when E4 >=8, the data after compression do not have error; As E4<8, compressed error <1/32768.
9. a high-efficiency high-accuracy seismic exploration data compression method, is characterized in that adopting following steps:
1. set the data of 24 analog to digital converters outputs as D24;
2. set data layout after compression as 3 exponent E3+1 bit sign position S1+16 position mantissa M16;
3. 24 bit data are converted to 3 exponent E3+1 bit sign position S1+16 position mantissa M16, the value of exponent E3 is 0 ~ 7, that is:
First calculate 24 bit data D24 high positions and have E3 individual 0, and when having E3>7, E3=7;
Then, the character position of data to be moved to left E3 position in sign bit S1, D24 data, 16, the high-order left side intercepting D24 data does not comprise sign bit as 16 mantissa M16;
4. 4 groups of samples are synthesized 10 bytes, namely the exponent E3+ sign bit S1 of 4 sampling points takies 2 bytes, and 4 mantissa take 8 bytes.
10. method according to claim 9, is characterized in that, when E4 >=7, the data after compression do not have error; As E4<7, compressed error <1/65536.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310723817.7A CN104749633A (en) | 2013-12-25 | 2013-12-25 | High-efficiency and high-precision seismic exploration data compression method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310723817.7A CN104749633A (en) | 2013-12-25 | 2013-12-25 | High-efficiency and high-precision seismic exploration data compression method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104749633A true CN104749633A (en) | 2015-07-01 |
Family
ID=53589603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310723817.7A Pending CN104749633A (en) | 2013-12-25 | 2013-12-25 | High-efficiency and high-precision seismic exploration data compression method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104749633A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772567A (en) * | 2016-12-23 | 2017-05-31 | 中国石油大学(华东) | A kind of data transfer lossless compression algorithm for seismic prospecting instrument |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4509150A (en) * | 1980-12-31 | 1985-04-02 | Mobil Oil Corporation | Linear prediction coding for compressing of seismic data |
| CN102457283A (en) * | 2010-10-28 | 2012-05-16 | 阿里巴巴集团控股有限公司 | Data compression and decompression method and equipment |
| CN102790656A (en) * | 2012-05-30 | 2012-11-21 | 新邮通信设备有限公司 | Method and system for compressing IQ data |
-
2013
- 2013-12-25 CN CN201310723817.7A patent/CN104749633A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4509150A (en) * | 1980-12-31 | 1985-04-02 | Mobil Oil Corporation | Linear prediction coding for compressing of seismic data |
| CN102457283A (en) * | 2010-10-28 | 2012-05-16 | 阿里巴巴集团控股有限公司 | Data compression and decompression method and equipment |
| CN102790656A (en) * | 2012-05-30 | 2012-11-21 | 新邮通信设备有限公司 | Method and system for compressing IQ data |
Non-Patent Citations (2)
| Title |
|---|
| 吕郊: "《地震勘探仪器原理》", 31 October 1997, 石油大学出版社 * |
| 黄绪德: "《石油物探》", 30 November 1979, 地质出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772567A (en) * | 2016-12-23 | 2017-05-31 | 中国石油大学(华东) | A kind of data transfer lossless compression algorithm for seismic prospecting instrument |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8547260B2 (en) | Compressive sense based reconstruction algorithm for non-uniform sampling based data converter | |
| CN104730573A (en) | Acquisition method and device for micro-seismic signals within large dynamic range | |
| US9900025B2 (en) | Efficient adaptive seismic data flow lossless compression and decompression method | |
| CN103519807A (en) | Brain electricity collecting device | |
| CN103281087A (en) | System and method of signal sampling based on multistage compressed sensing | |
| CN101968963B (en) | Audio signal compressing and sampling system | |
| CN102291152B (en) | Singular value decomposition-based compressed sensing noisy signal reconfiguration system | |
| CN103634005A (en) | Method for randomizing quantizing noise in analog-digital converter | |
| CN104749633A (en) | High-efficiency and high-precision seismic exploration data compression method | |
| CN102611450A (en) | Signal predication folding and interpolating ADC (Analog to Digital Converter) method based on power spectrum estimation | |
| CN204290909U (en) | The digital filter that a kind of bandwidth, center frequency point are adjustable | |
| CN108873786A (en) | Data collection system based on digital quantity conditioning | |
| CN106788435B (en) | Quantify sampling noise-reduction method | |
| CN103532552A (en) | Slope analog-digital converter for random sampling | |
| CN104218954A (en) | Method and device for compressed sampling of broadband array antenna | |
| CN104539261A (en) | Arbitrary sampling rate conversion interpolation filtering processing method | |
| CN204556850U (en) | A kind of microseismic signals collecting device of high dynamic range | |
| CN110297199B (en) | Frequency measurement method and system for cesium optical pump magnetometer based on full-phase FFT | |
| CN204216884U (en) | A kind of device utilizing FPGA to form gradual approaching A/D converter | |
| CN112671406A (en) | Analog-to-digital converter (ADC) with synthesized delay stage | |
| CN109581894B (en) | High-precision analog quantity transmission system and method based on signal combination | |
| CN105743505B (en) | Signal autocorrelation modulates compression sampling and restoration methods | |
| CN204119212U (en) | A kind of high speed can set the high-precision A/D sampling of resolution | |
| CN203492010U (en) | Photoelectric sensor receiving chip capable of outputting analog signals and digital signals simultaneously | |
| CN106788433B (en) | Digital noise source, data processing system and data processing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150701 |