Base64 extended coding method and system based on high-frequency character substitution algorithm

Abstract

The invention provides a Base64 extended coding method and system based on a high-frequency character substitution algorithm. On the basis that the original Base64 transcoding expansion ratio is 1 / 3,high-frequency character replacement is adopted, and if the expansion ratio is 20% and far smaller than 33.3% according to the 40% replacement rate, for data transcoding of a large data volume, the conversion economy can be greatly improved, and the expansion space is effectively saved; according to the method for changing Base64 coding shift transcoding, conversion is carried out by adopting a D* 64 + d algorithm, so that each code is independent of other codes, and the phenomenon that subsequent codes cannot be recovered due to abnormity is avoided; according to the method, the conversion range covers all ASCII data domains, the method is suitable for binary data transcoding under various applications, and the method only relates to one conversion algorithm, is irrelevant to realized languages and platforms, and is good in compatibility; end complement is not needed, and the algorithm is simpler.

Description

technical field [0001] The invention relates to the technical field of character encoding, in particular to a Base64 extension encoding method and system based on a high-frequency character substitution algorithm. Background technique [0002] As we all know, any data in the computer is stored and calculated according to binary data. In order to facilitate information exchange between different hosts on the network, ASCII code is uniformly adopted. ASCII codes 0-31 and 127 are invisible characters. When exchanging data on the network, it often needs to pass through multiple routing devices. Since different devices process characters differently, those invisible characters may be mishandled, which is not conducive to transmission. [0003] Such problems are also encountered in daily applications. Some application scenarios only apply to ASCII printable characters. For example, in traditional mail systems, ASCII control characters cannot be sent by mail. Therefore, it is ver...

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Problems solved by technology

[0008] The purpose of the present invention is to provide a Base64 extended encoding method and system based on a high-frequency character substitution algorithm, aiming to solve the problem of large occupied space and low efficiency caused by the increase of encoding when Base64 encoding is used in the prior art, and to realize effective saving of expansion space , improve conversion efficiency

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