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Precision-controlled self-adaptive data compression method

A technology of data compression and self-adaptation, applied in code conversion, electrical components, etc., can solve the problems of poor self-adaptability, inability to judge whether the data is abnormal, low self-adaptability, etc.

Inactive Publication Date: 2012-09-12
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] (2) Low adaptability
The current revolving door compression algorithm has poor adaptability, coupled with fixed parameters, it cannot adaptively maintain the balance between compression ratio and compression error
[0006] (3) The current revolving door compression algorithm cannot judge whether the data is abnormal, but also adopts the normal compression process for abnormal data, which seriously affects the performance of the algorithm

Method used

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  • Precision-controlled self-adaptive data compression method
  • Precision-controlled self-adaptive data compression method
  • Precision-controlled self-adaptive data compression method

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Embodiment Construction

[0057] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation and working principle of the self-adaptive data compression method with controllable accuracy proposed by the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments Describe in detail.

[0058] The controllable precision adaptive data compression method provided by the embodiment of the present invention includes the following steps:

[0059] Step A: performing revolving door compression processing on the data: including the following steps:

[0060] Step A1: Save the first data directly, and assign the information of the first data to SavedData; assign the information of the second data to WillSaveData and CurrentData, and calculate the slope SP top 、SP bot 、SP mid , the formula for calculating the slope is as follows:

[0061] ...

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Abstract

The invention relates to the technical field of data compression method, and discloses a precision-controlled self-adaptive data compression method. The compression method comprises the steps of: step A, carrying out a compression processing of data by a revolving door; step B, judging whether a self-adaptive calculation adjustment of the threshold width is needed or not; if a self-adaptive calculation adjustment of the threshold width is needed, carrying out a self-adaptive calculation adjustment of the threshold width; otherwise, carrying out compression processing of next data. The compression method of the invention adjusts the threshold width gradually by introducing feedback of standard errors, thereby assists in avoiding decrease of compression performance caused by artificial blind setting of threshold width value, and assists in avoiding a process of repeated massive tests. In addition, data validity judgments and dynamically adjusted data compression time window parameters are added, influence of exception data on algorithm performance is reduced. For slowly changing steady-state data, time interval of self-adaptive calculation is changed dynamically, pointless calculating actions are reduced, and compression performance is improved.

Description

technical field [0001] The invention relates to the technical field of data compression methods, and is mainly applicable to an adaptive data compression method with controllable precision. Background technique [0002] At present, real-time databases have been more and more widely used in telecommunications, finance, electric power and other industries, which greatly simplifies the control process of large-scale industrial processes and improves management efficiency. Because the industrial real-time database system needs to run for a long time, it is necessary to store a large amount of valuable on-site real-time data. If it is directly saved, as the system running time increases, it will take up a lot of storage devices to save these data. At the same time, since most of the data in the field of industrial process control are steady-state data, the fluctuation of its numerical value is relatively small, and complete storage will bring high data redundancy, which not only ...

Claims

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Application Information

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IPC IPC(8): H03M7/38
Inventor 王非莫益军黄本雄宋岸峰
Owner HUAZHONG UNIV OF SCI & TECH
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