Disaster information encoding and decoding method and device based on tree structure

Abstract

The invention discloses a disaster information encoding and decoding method and device based on a tree structure. The method comprises the steps of determining a fixed-length coding result of disasterinformation according to a first fixed-length code word of a root node in a tree structure corresponding to an acquisition source of the disaster information and a second fixed-length code word of asecond-layer node in the tree structure corresponding to the type of the disaster information; for each sub-node of the second-layer node corresponding to the type, sequentially splicing the identification values of each sub-category of the disaster information corresponding to each sub-node to form a first variable-length code word, and sequentially splicing the values of each sub-category to form a second variable-length code word; and sequentially splicing the fixed-length coding result, the first variable-length codeword, the demarcation symbol and the second variable-length codeword to obtain a coding result of the disaster information. By the method, complete information can be stored as much as possible, and information loss is avoided as much as possible; and on the premise of different information structures, unification and standardization are realized, and the information retention rate with accuracy is high.

Description

Technical field [0001] The present invention relates to the technical field of disaster information encoding, in particular to a method and device for encoding and decoding disaster information based on a tree structure. Background technique [0002] Earthquake disasters are one of the most serious natural disasters. Every year, the number of casualties is very large. All countries regard earthquake prevention and rescue as an important task, and post-earthquake rescue work is even more important. After the occurrence of a severely destructive earthquake, the accurate and rapid acquisition of earthquake disaster information will have a vital impact on the emergency command and decision-making process. As the earthquake disaster information includes information from a nationwide quick report network and public opinion information, the structure and source are different, and they lack standardization and readability. Therefore, encoding disaster information will have a huge practi...

AI Technical Summary

Problems solved by technology

[0014] Therefore, the above-mentioned existing disaster information coding methods hardly provide information coding solutions for the demand characteristics of multi-source heterogeneous disaster information coding: disaster information has the characteristics of multi-source and heterogeneity, and the above-mentioned traditional coding methods cannot directly applied

Images