Method for operating vehicle-mounted video recorder based on mobile communication network

Abstract

The invention discloses a method for operating a vehicle-mounted video recorder based on a mobile communication network and relates to a method for transmitting monitoring data of a vehicle-mounted terminal through the wireless communication network. The method comprises the conventional monitoring process, a real-time monitoring process and an alarm monitoring process, wherein the conventional monitoring process comprises the following steps of: in the travelling process of a vehicle, processing a signal of a microphone into audio coded data by using a sound recording and video recording unit, processing a signal of a video camera into high-resolution video coded data and storing the audio coded data and the video coded data in a secure digital (SD) card; when the vehicle stops, copying a data file in the SD card to a mobile hard disk drive and uploading a data file catalog; and uploading a specified data file according to a command of a monitoring center; the real-time monitoring process comprises the following step of: processing the signal of the microphone into the audio coded data by using the sound recording and video recording unit, processing the signal of the video camera into low-resolution video coded data and transmitting the audio coded data and the video coded data to a wireless communication unit for continuous uploading; and the alarm monitoring process comprises the following step of: storing the audio coded data and the high-resolution video coded data output by the sound recording and video recording unit in a corresponding alarm data file of the SD card within a limited period of time.

Description

technical field [0001] The invention relates to a method for a vehicle-mounted terminal to send monitoring data through a wireless communication network. Background technique [0002] The existing video surveillance system can alert possible intrusions in a certain area, capture and record relevant images in time when an alarm occurs, and become a powerful technical assistant for law enforcement departments. Although the existing video monitoring system can record the conditions of the monitoring site in detail in the form of images and sounds, due to the large data flow of image and sound signals, they are currently transmitted by wired transmission. It cannot meet the needs of in-vehicle monitoring for mobile operations such as urban public transport, long-distance passenger transport, traffic management, transportation law enforcement, and bank escort. [0003] The application of 3G communication makes the long-distance wireless transmission of large-flow data more conve...

AI Technical Summary

Problems solved by technology

[0004] But it also has the following disadvantages: 1, the industries of mobile operations such as urban public transport, long-distance passenger transport, traffic management, transport administration law enforcement, bank escort need to be monitored by a monitoring center for a large number of vehicles. If the above-mentioned real-time monitoring method is adopted , the monitoring center directly communicates wirelessly with the 3G video camera device on each vehicle, the amount of communication required to be carried out at the same time is too large, and the system overhead is large; and thus the system cannot guarantee the quality of communication

2. If the 3G video camera device transmits images with low-resolution video data in VCD format, the traffic can be reduced but it is difficult to meet the requirements of the monitoring center for image details during playback analysis; on the contrary, if the 3G video camera device transmits images in DVD format High-resolution video data transmission images, although it meets the requirements of the monitoring center for image details during playback, but the communication volume is too large, and the system burden is too heavy

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