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Method and apparatus for compressing data based on digital dictionary picture-representing data

A data dictionary and data compression technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of compression completion time delay, occupation of system resources, difficulty in meeting real-time data transmission requirements, etc., to achieve improved results, The effect of content optimization

Inactive Publication Date: 2007-03-14
姜志远
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Problems solved by technology

Since it is necessary to obtain as much data to be encoded in advance as possible to start the search operation of the string, it will inevitably lead to a delay in the completion time of compression, which is difficult to meet the transmission requirements of real-time data, and this method needs to open up a relatively large memory space as data. The buffer also takes up too many system resources

Method used

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  • Method and apparatus for compressing data based on digital dictionary picture-representing data

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Embodiment Construction

[0038] A key link in the realization of the present invention is to first select the sample data of a certain field and industry that is often used, for example, the text data with a higher probability of transmission through the network, and train the data dictionary for compression through the compression dictionary training software, and Store it in a handy database. When the character strings to be compressed (usually processed meaningless data streams) continuously flow into the data buffer, the data dictionary database is used to compress the characters in the data buffer, thereby ensuring the real-time performance of the system.

[0039] The present invention will be further described below in conjunction with the accompanying drawings.

[0040]Fig. 1 is a flow chart of the first embodiment of the data compression method of the present invention. The embodiment shown in Fig. 1 relates to a data dictionary database, wherein is stored with the sample character string tha...

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Abstract

The disclosed data compression method based on data dictionary comprises: presetting a data dictionary database; to the string formed by some characters from current position of the target string, substituting or outputting directly by index label of corresponding record in the database; after processing the target string, packing the output label and string into compressed data. This invention can improve dynamic compression effect.

Description

technical field [0001] The invention relates to a data compression method and device. Background technique [0002] In the process of data transmission, it is usually necessary to compress the data to be transmitted to reduce the amount of data actually transmitted, reduce the occupation of network transmission resources and reduce the chance of transmission failure, and improve the efficiency of data transmission. For example, the TCP / IP protocol has strict restrictions on the life cycle of data packets in each established transmission process, that is, after the transmission process is established, according to the basic principles of the TCP / IP protocol, the sender sends a data packet After receiving the packet, the second packet must be received within the specified time after receiving the successful reception message returned from the receiving end. Otherwise, it is considered that the previous packet failed to be sent, and the first packet will be resent; If the data...

Claims

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Application Information

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IPC IPC(8): G06F17/00H03M7/30
Inventor 白杰李薇鲁征宇
Owner 姜志远
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