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Data compression method and device

A data compression and data technology, applied in the field of data processing, can solve the problems of complex data compression methods

Inactive Publication Date: 2013-09-18
COMBA TELECOM SYST CHINA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides a data compression method and device to solve the complex problem of existing data compression methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1 provides a method of grouping the data to be compressed according to the compression ratio k and the input bit width m of the data to be compressed. In the first embodiment, according to the compression ratio k and the input bit width m of the data to be compressed, the packet length Q is determined, and every Q data in the data to be compressed is divided into a group, and processed in groups. Since all packets have the same length Q, the Q value can be notified to the decompression end before the compressed data is transmitted (the notification method includes but not limited to the signaling transmission of the compression end and the decompression end), so that when transmitting the compressed data, there is no need to transmit packet length information.

[0026] Other grouping methods may include: according to the compression ratio k, the input bit width m of the data to be compressed, and other conditions (such as the statistical characteristics of th...

Embodiment 2

[0028] Embodiment 2 provides two methods for compressing each group of data to be compressed according to the value of the real part and the value of the imaginary part of each data in the group of data to be compressed. Among them, according to the value of the real part and the value of the imaginary part of each data in the group of data to be compressed, a variable related to the group of data to be compressed is determined, such as the maximum value data_max of the absolute value of the real part and the absolute value of the imaginary part i or the maximum power_max of the sum of squares of the real and imaginary parts i , according to the determined variable, the group of data to be compressed is compressed, avoiding such as the prior art publication number is US2007147495A1, the publication date is June 28, 2007, and the invention name is: "Multilevel Data Compression Using a Single Compression In the U.S. patent document of “Engine”, it is necessary to perform complex...

Embodiment 3

[0096] In the third embodiment, the input bit width of the data to be compressed is m=12, the compression ratio k=3:2, the bit width of the shift information is n=1, a fixed-length grouping method is adopted, and according to the actual data of each group of data to be compressed The maximum value of the absolute value of the part and the absolute value of the imaginary part data_max i A compression process of shifting and truncating is performed on the group of data to be compressed.

[0097] image 3 It is a schematic diagram of the process of the data compression method in the third embodiment. Such as image 3 As shown, the method for data compression in the third embodiment includes the following steps:

[0098] S301: According to Formula 1, determine the packet length Q=2, group the data to be compressed, and each group contains two data to be compressed;

[0099] For example, for the current group of data to be compressed, including two data data1 and data2, real(da...

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Abstract

The invention relates to the technical field of data processing, in particular to data compression method and device, and aims to solve the problem that processing by the existing data compression method is complex. The data compression method includes: grouping data to be compressed according to a compression ratio k and input bit width m of the data to be compressed; for each group of data to be compressed and according to the value of a real part and the value of an imaginary part of each data in the group of data to be compressed, compressing the group of data to be compressed. The letter m is a positive integer, and the letter k is larger than 1. According to the method, for each group of data to be compressed and according to the value of the real part and the value of the imaginary part of each data in the group of data to be compressed, the group of data to be compressed is compressed. Therefore, application of complex processes such as DCT transform in the data compression process of the existing method is avoided.

Description

technical field [0001] The invention relates to the technical field of data processing, in particular to a data compression method and device. Background technique [0002] Transmission data (such as: text, image, sound data, etc.) in a communication system generally has a certain degree of repetitive or redundant information. If the data is compressed at the sending end through data compression technology, the redundancy of data information can be reduced, which can reduce the amount of data actually transmitted and effectively improve the communication efficiency of the communication system. [0003] With the continuous development of communication technology, broadband signal has become the mainstream trend in the development of data transmission technology in the communication industry, which requires a higher rate on the transmission link. The use of data compression technology can greatly increase the transmission capacity and increase the number of users at the same ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M7/30
Inventor 苏慧君杨俊
Owner COMBA TELECOM SYST CHINA LTD
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