CN1584875B - Ergodic compressing and decompressing method for batched computer document - Google Patents
Ergodic compressing and decompressing method for batched computer document Download PDFInfo
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- CN1584875B CN1584875B CN 200410046015 CN200410046015A CN1584875B CN 1584875 B CN1584875 B CN 1584875B CN 200410046015 CN200410046015 CN 200410046015 CN 200410046015 A CN200410046015 A CN 200410046015A CN 1584875 B CN1584875 B CN 1584875B
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- 238000007906 compression Methods 0.000 claims abstract description 44
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- 230000006837 decompression Effects 0.000 claims abstract description 15
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Abstract
An ergodic compression and decompression method of batch computer file can carry out automatic and high efficient erogic compression or decompression treatment for any one or any batch of computer file. It automatically carry out damage or damage free coding for file being compressed.
Description
Technical field
Field under the present invention is an infotech.
Background technology
Computer documents usually needs to carry out ergodicity compression processing in batches.The file that may be existing in these files needs compression, as the bitmap file etc., having does not need the file that compresses yet, as the Mp3 file etc.
Traditional compression method, as the Zip compression, they are not discerned and distinguish file type wherein, all files are all adopted without exception with a kind of lossless compression-encoding compress.Adopt this method, implement fairly simplely, but it can not make and need the file of compression to obtain sufficient compression effectiveness, the file that does not need to compress will not be compressed, to avoid waste the processing time.
The patent of invention of our company " Intelligent Compression of computer documents and decompression method " (China Patent No. ZL:01124158.6, U.S. Patent number: US6,460,044BI), though described one group of computer documents of intending compression/de-compression for artificial selection, more effective method of carrying out compression/de-compression how, but do not describe for any a collection of computer documents how automatically to carry out the ergodicity compression/decompression processes.
Summary of the invention
The present invention is the improvement to foregoing invention.The objective of the invention is provides a kind of compressing/decompressing method automatically and efficiently for the batch computer documents carries out the ergodicity compression/decompression processes.The present invention also can be used for compression/decompression processes that any one computer documents is suited automatically.
Description of drawings
The mode that available software of the present invention, hardware or software and hardware combine realizes.Its FB(flow block) is as follows.
Fig. 1: squeeze operation FB(flow block) A
Fig. 2: squeeze operation FB(flow block) B
Fig. 3: squeeze operation FB(flow block) C
Fig. 4: decompression operation FB(flow block).
Embodiment
Squeeze operation of the present invention need have two groups of file types of such setting in the system:
1.A the group file type does not promptly need the file type of compressing.They can be to have carried out compressed sufficiently file, for example Mp3 file; They also can be the files that should not compress, and for example have the file that need frequently retrieve in the computing machine etc.
Because these files need not compress, its file layout can be known, also can be unknown, and these file types can only be represented with the file extent list of file names.
2.B the group file type promptly needs the file type of compressing with specific compression algorithm.The file layout of these file types need be known, and their data message, or is suitable for adopting lossy compression method, as audio-frequency information, and video information; Or have the more effective lossless compression algorithm of general lossless coding that adopts than system, as soot-and-whitewash.
These file types need to be represented by two tabulations: one is the file extent list of file names; Another is a document control information list corresponding with it.
A. at a collection of computer documents of compression side's initiating terminal by user's appointment, other operation will be carried out according to the FB(flow block) of Fig. 1 automatically by computer system.From a collection of computer documents of user's appointment, appoint and get a file, judge then whether it belongs to A group file type, that is whether it needs the file that compresses.System need verify whether the file extension of this document is included in the file extent list of file names of A group file for this reason.If, then directly deliver to G frame among the figure one, promptly deliver in the BCF literature kit.If not, then enter next step operation:
B. verify whether it belongs to B group file type, that is whether it needs the file type compressed with specific algorithm.System will verify at first whether the extension name of this document is listed in the file extent list of file names of B group file this moment, if, the control information that system will then verify this document whether with B group document control information list in corresponding control information just conform.If above-mentioned two checkings all are sure, then this document belongs to B group file type; If it negates that then this document does not belong to B group file type that arbitrary checking is arranged.
If C. this document does not belong to B group file type, then system adopts general lossless compression-encoding (for example LZW) compression this document of systemic presupposition automatically.
If D. this document belongs to B group file type, then system will determine that it is the simple files (for example bmp image) that only comprises a kind of data message type, or comprise the composite file (for example had both comprised the ppt file that text message also comprises picture information, or comprised the literature kit of a plurality of files) of several data information type.
E. for a simple files, according to the file layout of this document, system can discern the data message type that this document comprises automatically, and adopt a kind of suitable compressed encoding automatically.For example, for text message or X-ray photograph, system will adopt lossless compress automatically, and for a photochrome, system will adopt to diminish or lossless compress automatically according to user's selection.
F. for a composite file, according to the file layout of this document, system will carry out message unit to it automatically and split, and make each message unit only comprise a kind of data message type.System can adopt the mode similar to above-mentioned E, compresses the data message in each message unit automatically.
G. in order to preserve above-mentioned data message that those were compressed and corresponding control information, system need define the literature kit form of self.This form can be specified and name by system designer, but called after BCF form (Batch Compression Format) for example has file extension bcf.Last step of figure one is about to each file that has compressed or compressed, and forms a BCF literature kit.
If H. the batch documents of user's appointment does not also all dispose, then system repeats the process of above-mentioned A to G, up to all disposing.
Note 1: in the present invention,, also can composite file not listed in B group file type, thereby composite file will adopt also general lossless coding to compress for reducing the complicacy of operation.The FB(flow block) of this moment will be as shown in Figure 2, will not have aforesaid operations step D and F in the aforesaid operations step.
Note 2: also can not set B group file type among the present invention, need the file of compression to adopt general lossless compression-encoding without exception, shown in Figure 3 as FB(flow block).
The present invention also provides the decompression method to the batch computer documents, when compression process as shown in Figure 1, the flow process that then decompresses is as shown in Figure 4.At the initiating terminal of Fig. 4, by the batch documents that the user specifies pending ergodicity to decompress, remaining operation is finished automatically by employing system of the present invention, and is as described below:
A. from above-mentioned batch documents, appoint and get a file, check whether it has the bcf extension name.If not, then direct conduct is decompressing files; If, verify whether it really is the bcf file then according to the control information of this document.If not, then also direct conduct is decompressing files; If then enter next step operation:
B. according to the file layout of this bcf file, whether decision this document is compressed file.If not compressed file, then directly as decompressing files; If compressed file then enters next step operation:
C. according to the file layout of this bcf file, decision this document is the simple files that only comprises a kind of compressed data information type, or comprises the composite file of multiple compressed data information type.
If D. this document is a compressed simple files, system will discern the data message type in this document automatically, and use and the compressed encoding coding that decompresses accordingly, data message in decompress(ion) this document.
If E. this document is a compressed composite file, and this composite file is not used fully with a kind of compressed encoding and is compressed, system will automatically be split as a plurality of message units to this document, and each unit only comprises a kind of compressed data information type.
F. discern the data message type of each message unit, and use and each message unit of the corresponding decompress(ion) coding of compressed encoding decompress(ion), decompressing files formed.
If G. above-mentioned batch documents is not also all finished above-mentioned processing, system will repeat the operation of top A to F automatically, dispose up to all files.
Note 3: if native system is when carrying out squeeze operation, undertaken by note 1, be that composite file adopts general lossless coding to compress, then this moment this composite file is also directly adopted corresponding decompress(ion) coding, system does not carry out message unit to this composite file and splits, and does not have the operation of above-mentioned E and F item.
Note 4: if native system is when compressing, undertaken by note 2, the file that promptly needs to compress all adopts general lossless coding to compress, then also all adopt corresponding decompression coding to decompress(ion).
Claims (15)
1. by computer system computer documents is carried out the method that ergodicity is compressed automatically, comprises following operation:
(1) in system, set following two groups of file types:
A.A organizes file type, does not promptly need the file type compressed, and they are file types of having compressed, or the file type that should not compress;
B.B organizes file type, promptly needs the file type compressed with specific compression algorithm, and the file layout of these file types need be known, and they have the specific compression algorithm of the general lossless coding that is different from default; These file types need to be represented by two tabulations: one is the file extent list of file names, and another is a document control information list corresponding with it;
(2) computer documents of handling for any one pending ergodicity compression, whether it belongs to two groups of file types of default by following operation demonstration:
A. verify whether it belongs to A group file type, that is verify the file whether it need not compress;
B. verify whether it belongs to B group file type, that is whether it needs the file type compressed with specific algorithm;
System will verify at first whether the extension name of this document is listed in the file extent list of file names of B group file this moment, if, the control information that system will then verify this document whether with B group document control information list in corresponding control information just conform; If above-mentioned two checkings all are sure, then this document belongs to B group file type, negates that then this document does not belong to B group file type if arbitrary checking is arranged;
(3) according to above-mentioned checking result, take following squeeze operation:
If A. this document belongs to A group file type, then will not compress;
If B. this document does not belong to A group file type, do not belong to B group file type yet, the general lossless compression-encoding that then adopts systemic presupposition to compression;
If C. this document belongs to B group file type, and this document only comprises a kind of data message type, then according to the data message type of this document, adopt its specific compression algorithm to compression;
If D. this document belongs to B group file type, and this document comprises the several data information type, then at first this document is split as a plurality of message units, each unit only comprises a kind of data message type, then according to the data message type of each message unit, adopt respectively its specific compression algorithm to compression.
2. the method for claim 1, wherein A group file type can only be represented with the file extent list of file names, for the computer documents that any one pending ergodicity compression is handled, system can only need verify whether the file extension of this document is included in the file extent list of file names of A group file.
3. the method for claim 1, the use in computer software, hardware or soft, hardware combine, or the use in device with corresponding computer function.
4. by computer system computer documents is carried out the method that ergodicity is compressed automatically, comprises following operation:
(1) in system, set following two groups of file types:
A.A organizes file type, does not promptly need the file type compressed, and they are file types of having compressed, or the file type that should not compress;
B.B organizes file type, promptly needs the file type compressed with specific compression algorithm, and the file layout of these file types need be known, and they have the specific compression algorithm of the general lossless coding that is different from default; These file types need to be represented by two tabulations: one is the file extent list of file names, and another is a document control information list corresponding with it;
(2) computer documents of handling for any one pending ergodicity compression, whether it belongs to two groups of file types of default by following operation demonstration:
A. verify whether it belongs to A group file type, that is verify the file whether it need not compress;
B. verify whether it belongs to B group file type, that is whether it needs the file type compressed with specific algorithm;
System will verify at first whether the extension name of this document is listed in the file extent list of file names of B group file this moment, if, the control information that system will then verify this document whether with B group document control information list in corresponding control information just conform; If above-mentioned two checkings all are sure, then this document belongs to B group file type: if arbitrary checking is arranged negates that then this document does not belong to B group file type;
(3) according to above-mentioned checking result, take following squeeze operation:
If A. this document belongs to A group file type, then will not compress;
If B. this document does not belong to A group file type, do not belong to B group file type yet, the general lossless compression-encoding that then adopts systemic presupposition to compression;
If C. this document belongs to B group file type, and this document only comprises a kind of data message type, then according to the data message type of this document, adopt its specific compression algorithm to compression.
5. the method for claim 4, wherein A group file type can only be represented with the file extent list of file names, for the computer documents that any one pending ergodicity compression is handled, system can only need verify whether the file extension of this document is included in the file extent list of file names of A group file.
6. the method for claim 4, the use in computer software, hardware or soft, hardware combine, or the use in device with corresponding computer function.
7. by computer system computer documents is carried out the method that ergodicity is compressed automatically, comprises following operation:
(1) set A group file type in system, promptly do not need the file type compressed, they are file types of having compressed, or the file type that should not compress;
(2) computer documents of handling for any one pending ergodicity compression verifies whether it belongs to A group file type, that is its file that whether need not compress;
(3), take following squeeze operation according to the result of above-mentioned checking:
If A. this document belongs to A group file type, then will not compress;
If B. this document does not belong to A group file type, the general lossless compression-encoding that then adopts systemic presupposition to compression.
8. the method for claim 7, wherein A group file type can only be represented with the file extent list of file names, for the computer documents that any one pending ergodicity compression is handled, system can only need verify whether the file extension of this document is included in the file extent list of file names of A group file.
9. the method for claim 7, the use in computer software, hardware or soft, hardware combine, or the use in device with corresponding computer function.
10. the computer documents that carries out the ergodicity squeeze operation for the method that requires 1 according to aforesaid right by computer system carries out the method that ergodicity decompresses automatically, and its operation steps comprises:
(1), checks whether it has the private file extension name of setting when carrying out the ergodicity squeeze operation by claim 1 for the computer documents of any one pending ergodicity decompression; If not, then direct conduct is decompressing files, if then whether the control information checking this document according to the file with this proprietary extensions name really is the file with this proprietary extensions name, if not, then also directly as decompressing files; If then enter next step operation;
(2) according to having a file layout of the file of this proprietary extensions name, whether decision this document is compressed file; If not compressed file, then directly as decompressing files, if compressed file then enters next step operation;
(3) according to having the file layout of the file of this private file extension name, whether decision this document only comprises a kind of compressed encoding; If, then adopt corresponding decompress(ion) coding to decompress(ion), if not, then this document is split as a plurality of message units, each message unit only comprises a kind of compressed encoding, adopt respectively corresponding decompress coding to decompress(ion).
11. the method for claim 10, the use in computer software, hardware or soft, hardware combine, or the use in device with corresponding computer function.
12. the computer documents that carries out the ergodicity squeeze operation for the method that requires 4 according to aforesaid right by computer system carries out the method that ergodicity decompresses automatically, its operation steps comprises:
(1), checks whether it has the private file extension name of setting when carrying out the ergodicity squeeze operation by claim 4 for the computer documents of any one pending ergodicity decompression; If not, then direct conduct is decompressing files, if then whether the control information checking this document according to the file with this proprietary extensions name really is the file with this proprietary extensions name, if not, then also directly as decompressing files; If then enter next step operation;
(2) according to having a file layout of the file of this proprietary extensions name, whether decision this document is compressed file; If not compressed file, then directly as decompressing files, if compressed file then enters next step operation;
(3) according to having a file layout of the file of this proprietary extensions name, the decision compressed encoding that this document adopted, adopt corresponding decompress coding to decompression.
13. the method for claim 12, the use in computer software, hardware or soft, hardware combine, or the use in device with corresponding computer function.
14. carry out the method that ergodicity decompresses by computer system automatically for the computer documents that carries out the ergodicity squeeze operation according to the method for claim 7, its operation steps comprises:
(1), checks whether it has the private file extension name of setting when carrying out the ergodicity squeeze operation by claim 7 for the computer documents of any one pending ergodicity decompression; If not, then direct conduct is decompressing files, if then whether the control information checking this document according to the file with this proprietary extensions name really is the file with this proprietary extensions name, if not, then also directly as decompressing files; If then enter next step operation;
(2) according to having a file layout of the file of this proprietary extensions name, whether decision this document is compressed file; If not compressed file, then directly as decompressing files, if compressed file then enters next step operation;
(3) according to having a file layout of the file of this proprietary extensions name, the decision general lossless compression-encoding that this document adopted, adopt corresponding decompress coding to decompression.
15. the method for claim 14, the use in computer software, hardware or soft, hardware combine, or the use in device with corresponding computer function.
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| CN 200410046015 CN1584875B (en) | 2004-06-01 | 2004-06-01 | Ergodic compressing and decompressing method for batched computer document |
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| CN 200410046015 CN1584875B (en) | 2004-06-01 | 2004-06-01 | Ergodic compressing and decompressing method for batched computer document |
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| CN1584875B true CN1584875B (en) | 2011-08-10 |
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| CN101599986B (en) * | 2008-06-02 | 2012-08-08 | 宏碁股份有限公司 | Method for increasing transmission speed of files and computer system |
| CN102054038B (en) * | 2010-12-30 | 2014-05-28 | 东莞宇龙通信科技有限公司 | File decompression method and device as well as mobile terminal |
| CN102495889A (en) * | 2011-03-22 | 2012-06-13 | 苏州阔地网络科技有限公司 | File batch processing method, system and server |
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| CN102761540B (en) * | 2012-05-30 | 2014-11-19 | 北京奇虎科技有限公司 | Data compression method, device and system and server |
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| CN103902567A (en) * | 2012-12-26 | 2014-07-02 | 联想(北京)有限公司 | Data processing method, device and system |
| CN103218224B (en) * | 2013-03-29 | 2016-09-21 | 东莞宇龙通信科技有限公司 | A kind of method improving memory space utilization rate and terminal |
| CN103701860A (en) * | 2013-12-06 | 2014-04-02 | 北京奇虎科技有限公司 | Network transmission and receiving methods and devices for small files, and network transmission system |
| CN103873860B (en) * | 2014-03-18 | 2017-12-22 | 深信服网络科技（深圳）有限公司 | Document transmission method and device |
| CN104978319A (en) * | 2014-04-02 | 2015-10-14 | 东华软件股份公司 | Method and equipment used for classified transmission of files |
| CN106897052B (en) * | 2015-12-24 | 2021-08-24 | 北京奇虎科技有限公司 | APK file compression method and device |
| CN113296709B (en) * | 2017-06-02 | 2024-03-08 | 伊姆西Ip控股有限责任公司 | Method and apparatus for deduplication |
| CN109325006A (en) * | 2018-08-23 | 2019-02-12 | 郑州云海信息技术有限公司 | A kind of method and apparatus for compressing the method and apparatus stored, decompression downloading |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1405705A (en) * | 2001-08-20 | 2003-03-26 | 北京九州计算机网络有限公司 | Intelligent compression method for file of computer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1405705A (en) * | 2001-08-20 | 2003-03-26 | 北京九州计算机网络有限公司 | Intelligent compression method for file of computer |
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