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Secure and lossless data compression

A compressor, absolute number technology, applied in the field of information communication, which can solve the problems of size reduction and high occupation

Inactive Publication Date: 2015-07-29
ALCATEL LUCENT SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Considering the increase in data or text traffic (e.g. on mobile phone networks), this occupancy seems prohibitive
[0004] Some compression solutions such as zip, rar, etc. exist, however these solutions may not bring any size reduction, especially when applied to short length text strings

Method used

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  • Secure and lossless data compression
  • Secure and lossless data compression
  • Secure and lossless data compression

Examples

Experimental program
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Embodiment Construction

[0043] Text is a string sorted as sequence 1 of character 4. A typical way of representing characters 4 numerically is through the use of an absolute code table 10, where each character 4 is represented by a unique absolute number 5. One of the most famous such absolute encoding tables 10 is the absolute encoding table defined by the ASCII specification. The first half of the ASCII absolute code table 10 is in figure 1 shown in . The character 4 mentioned in the third column, seventh column, respectively, is represented in decimal by the absolute number indicated in the first column, fifth column, respectively, and indicated by the second, sixth column, respectively The same absolute number of 5 in hexadecimal. As an example, the character "A" is represented by the absolute number "065" in decimal and the absolute number "41" in hexadecimal.

[0044] In this ASCII absolute code table 10, each character 4 is usually represented by a unique one-byte number 5, thereby limitin...

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PUM

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Abstract

A method for compressing a string of characters, initially defined by an original ordered sequence of characters each represented by an absolute number uniquely representing each character, according to an absolute coding table, comprising the steps of: - parsing said original sequence into at least one first type sub-sequence comprising contiguous characters, each of the contiguous characters of the first type sub-sequence being selected based on a matching character in a relative coding table (20), and, into at least one second type sub-sequence comprising remaining contiguous characters, - coding each first type sub-sequence using said relative coding table (20), - representing each character from each second type sub-sequence by its absolute representing number from said absolute coding table. A corresponding method for decompressing a compressed sequence.

Description

technical field [0001] The technical field is the field of information communication. More specifically, safe and lossless compression / decompression is addressed. Background technique [0002] Text is a string sorted as a sequence of characters. The typical way to represent characters numerically is through the use of absolute code tables, where each character is represented by a unique absolute number. One of the most famous such absolute encoding schemes is that defined by the ASCII specification (norm). In this ASCII absolute code table, each character is usually represented by a unique one-byte number, thereby limiting the size of this ASCII absolute code table to 256 characters. A typical way to numerically represent an ordered sequence of characters is to provide a corresponding ordered sequence of numbers, each character represented by its absolute number in the same order. [0003] Thus, a string of n characters is represented by a sequence of numbers occupying n...

Claims

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Application Information

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IPC IPC(8): H03M7/30H03M7/40
CPCH03M7/40H03M7/30G06F16/2237
Inventor A·德内
Owner ALCATEL LUCENT SAS
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