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Data difference analysis method

A technology of difference analysis and analysis method, which is applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., and can solve problems such as poor effect of difference analysis

Inactive Publication Date: 2009-09-30
北京兴宇中科科技开发股份有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In practical applications, all kinds of data have their own format, if you do not understand the data format, the effect of difference analysis will be relatively poor

Method used

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Experimental program
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Embodiment Construction

[0041] The present invention will be further described below in conjunction with example:

[0042] like figure 1 as shown, figure 1 Describes the process of obtaining difference data after performing difference analysis between source data and target data;

[0043] like figure 2 as shown, figure 2 Describes the process of merging source data and differential data to obtain target data.

[0044] like image 3 as shown, image 3 It is an example of a system where there are both special-purpose difference analysis algorithms and general-purpose difference analysis algorithms. There are three special-purpose difference analysis algorithms: Word-specific difference analysis algorithms, Excel-specific difference analysis algorithms, and JPG image-specific difference analysis algorithms.

[0045] like Figure 4 as shown, Figure 4 An example of the functions that a dedicated differential analysis algorithm should have is illustrated, and the details are as follows:

[0046...

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Abstract

The invention belongs to the field of data compression, more particularly relates to a data difference analysis method. By adopting the method, a general difference analysis algorithm and a special difference analysis algorithm simultaneously exist in a system; whether the corresponding special analysis algorithm exists or not is searched according to linked characteristics while analyzing data; when the special difference analysis algorithm exists, the special difference analysis algorithm is adopted to analyze the data; and when the special difference analysis algorithm does not exist, the general difference analysis algorithm is adopted to analyze the data.

Description

technical field [0001] The invention belongs to the field of data compression, and in particular relates to a data difference analysis method. Background technique [0002] In some network storage applications, such as network storage systems, usually, when a file is modified and then saved again, the entire file needs to be uploaded to the server again; Download the data of file A, modify file A to form A', if you want to save A', you need to retransmit the whole A' to the server. Since only a small part of the file is modified after the file is modified, if the entire file is re-uploaded, network resources will be greatly wasted. [0003] For example, if you download a 10M byte file a.doc from the server and save it after modifying one of the characters, you need to retransmit the 10M byte file to the server. If we can extract the data difference before and after modification and send it to the server, only a very small amount of data needs to be transferred. In respons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
Inventor 林兆祥
Owner 北京兴宇中科科技开发股份有限公司