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System for compressing parallel port received data on basis of LZW (Lempel-Ziv-Welch) compression algorithm

A technology for receiving data and compressing algorithms, which is applied in the direction of electrical digital data processing, calculation, program control design, etc., to achieve the effects of low cost, fast processing speed, and easy technical implementation

Inactive Publication Date: 2015-04-29
DALIAN SHENGRONGXIANG SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It provides technical possibility for the development of the above system

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  • System for compressing parallel port received data on basis of LZW (Lempel-Ziv-Welch) compression algorithm
  • System for compressing parallel port received data on basis of LZW (Lempel-Ziv-Welch) compression algorithm

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Embodiment Construction

[0016] Such as figure 1 and figure 2 Shown this system based on LZW compression algorithm that parallel port receiving data is compressed, it is characterized in that comprising the steps:

[0017] 1) Real-time monitoring of whether the computer central processing unit has issued an instruction to receive data inward through the parallel port receiving data identification unit;

[0018] 2) Once the parallel port receiving data identification unit finds that the computer central processing unit has issued an instruction to receive data inwardly, it will send a signal to notify the active unit;

[0019] 3) The main control unit automatically establishes a connection with the computer central processing unit, retrieves the data to be received by the computer central processing unit, and then sends it to the LZW compression unit for compression processing;

[0020] 4) Finally, the main control unit feeds back the compressed data to the computer central processing unit, and the ...

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Abstract

The invention discloses a system for compressing parallel port received data on the basis of an LZW (Lempel-Ziv-Welch) compression algorithm. The system is characterized by adopting the following steps: 1, whether a computer central processing unit makes a command of receiving data inwards is monitored in real time by a parallel port received data identification unit; 2, once the parallel port received data identification unit finds that the computer central processing unit makes the command of receiving the data inwards, a signal is sent to notify a main control unit; 3, the main control unit is automatically connected with the computer central processing unit, calls the data to be received by the computer central processing unit and then sends the data to an LZW compression unit to carry out compression processing; 4, finally, the main control unit feeds back the compressed data to the computer central processing unit and the computer central processing unit carries out subsequent processing. The system provided by the invention has the characteristics of convenience for use, high processing speed, easiness for technology implementation and the like.

Description

technical field [0001] The invention relates to a system for compressing data received by a parallel port based on an LZW compression algorithm. Background technique [0002] With the general promotion of enterprise modernization, paperless office has been accepted by more and more enterprises because of its advantages such as high office efficiency, convenient file transfer, resource and cost saving. It is precisely because of its convenient file transfer feature that the requirements for enterprise data space are greatly increased. [0003] Especially for enterprises to compress the data received by the parallel port, it is necessary for the office staff of the enterprise to manually compress the transmission content. Today, efficiency is the first priority, and it is almost impossible to require the possibility of compressing every file. Therefore, a system that can compress the data received by the parallel port needs to be developed urgently. [0004] The LZW algorith...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/20H03M7/30
CPCG06F9/30003H03M7/3088
Inventor 王永生
Owner DALIAN SHENGRONGXIANG SCI & TECH