Positioning data compression method and system used for Beidou vehicle-mounted system

Abstract

The invention provides a positioning data compression method used for a Beidou vehicle-mounted system. The method includes the steps that N pieces of positioning data are sequentially converted into N pieces of preprocessed positioning data including the positioning state, the latitude, the longitude, the ground velocity and the ground azimuth, and the value of N is recorded with a preset block counter; half-byte compression is performed on the N pieces of preprocessed positioning data including the positioning state, the latitude, the longitude, the ground velocity and the ground azimuth, and N pieces of first compressed positioning data are obtained; the statement identifier header, the world standard time, the latitude hemisphere, the longitude hemisphere and the date of the first piece of stored positioning data and the value of N recorded by the preset block counter are added to the front end of the first piece of compressed positioning data among the N pieces of first compressed positioning data, and then the first piece of compressed positioning data among the N pieces of first compressed positioning data and the other N-1 pieces of first compressed positioning data form second compressed positioning data together. Through the positioning data compression method and system, the data compression ratio is increased, and system resource consumption is reduced.

Description

technical field [0001] The invention relates to the field of data processing, in particular to a positioning data compression method and system for a Beidou vehicle-mounted system. Background technique [0002] In the positioning and navigation system of the Beidou vehicle-mounted system, the main problems faced are: in order to realize the navigation function, the Beidou vehicle-mounted system must store a large amount of positioning data; at the same time, these data must be uploaded to the control and dispatch center through the GSM channel. If sending by message, it needs to be sent several times. Therefore, it is necessary to adopt a data compression method, which can give full play to the existing resources of the system from the perspective of software without increasing the cost of hardware, and solve the problem of large amount of positioning data in the existing Beidou positioning and navigation system. [0003] The embedded Beidou vehicle-mounted system requires ...

AI Technical Summary

Problems solved by technology

[0002] In the positioning and navigation system of the Beidou vehicle-mounted system, the main problems faced are: in order to realize the navigation function, the Beidou vehicle-mounted system must store a large amount of positioning data; at the same time, these data must be uploaded to the control and dispatch center through the GSM channel. To send by message, it needs to be sent in several times

Therefore, although there are many mature compression algorithms, it is difficult to meet the above requirements at the same time.

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