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On-board video surveillance systems solution development - Monitoring - Security Industry
Traditional fixed-point-board video surveillance of vehicles only to save the video recording, in the 2G environment (GP RS / EDGE / CDMA), some manufacturers try to make pictures, video, real-time network transmission. Photos occupancy rate of transmission of the network low, generally 10 seconds or so can picture net return center; video network transmission on the network requirements are higher, 2G network environment can only transmit a low frame rate video images.
With the growing popularity of 3G networks, the 3G network environment, network bandwidth is doubled to meet the high frame rate, high image quality video data transmission needs. To the original simple video-based vehicle video surveillance Solutions Gradually to the systematic, network, platform-based direction. As the mobility of vehicles, vehicle remote video browsing users, vehicles GPS Satellite positioning, and the vehicle terminal needs to interact with the platform data is particularly urgent. The following on-board video surveillance system-level solutions Technology Direction of light as paper.
One car video monitor system-level solutions, analysis of the status and needs
1. The demand for wireless network adaptability
Car Wireless Video Surveillance System Video Monitoring with the traditional fixed points that are distinctly different:
1) terminal IP address is not fixed, there Firewall Restrictions; operators assigned to the wireless terminal IP address may change at any time and for the firewall restrictions, closed parts of the port;
2) network bandwidth fluctuations, the number of wireless networks where the number of users, geographical differences, and network optimization and other issues affecting the future level of quality, real-time changes in network bandwidth, or even moment to zero, which requires car video terminal can adapt This pattern of changes in network bandwidth;
3) real-time sports-car terminals, base stations, switching frequency, exercise also resulted in the video transmission on the unpredictability of wireless networks. In order to enhance the car video wireless transmission of results, the characteristics required under the above video encoding algorithm, to improve the network transmission protocol.
2. Data management requirements of multi-level
The core of large-scale video surveillance system needs is the ability to multi-level management, car video surveillance system should have the following functions:
1) allocation of management rights, for security considerations, it is necessary categories of users, to enjoy different rights, allocation of different tasks;
2) video streaming forwarding technology, the wireless network should be sent to the center of the video distributed to different users, multiple users simultaneously view all the way to meet the requirements of the video;
3) system scalability, the system should consider the future increase in the number of users after the capacity expansion requirements, without changing the system topology based on the number can only increase the relay server for system expansion.
3. Intelligent Transportation Management needs Intelligent Transportation System (ITS) is a range of advanced integrated electronic technology to effectively apply the Transportation Management system, and establish a range in a large, full-functioning, real-time, accurate and efficient integrated transport and management systems.
Car video surveillance system as the organic composition of the intelligent transport system can achieve the following functions: 1) Vehicle GPS positioning information management, car video surveillance terminal can transmit real-time GPS satellite positioning information to the management center; 2) real-time upload vehicle information , car video terminal to vehicles in the vehicle condition (such as engine speed and other information) transmitted real-time network management center; 3) data interactivity, 3G wireless networks that can satisfy car video network transmission, but also allows voice, text, interaction picture and other information; 4) other functions, real-time intelligent traffic management statistics for the number of vehicles has a strong passenger demand, management center with real-time video viewing, the number of vehicles can have a general understanding.
4. Ad Entertainment Video issued a demand
Entertainment broadcast advertising for the owner to obtain certain benefits, in the domestic advertising industry competitive vehicles today, personalized car advertising vehicle advertising has become the general direction of development. The main demand for advertising: 1) be updated vehicle advertising data, 3G network to meet advertiser demand for advertising on-board real-time updates; 2) data feedback ads, advertisers need to daily statistics on the number of ads, which requested vehicle terminal can be accumulated amount of advertising delivery and interaction with the Centre; 3) data exchange functions, in advertising, the system should have issued a circular, weather, road information and other data exchange functions.
Second, analysis of system-level solutions 1. Car video monitor system composition
Car video surveillance system consists of three parts: the vehicle terminal, wireless network transmission subsystems, central management platform.
(A) of the vehicle terminal (ie car set DVR), in addition to traditional video recording function, should also have: GPS satellite positioning, 3G wireless network transmission, video broadcasting of multimedia entertainment functions such as advertising.
(B) wireless network transmission subsystems, the system can aid the operator's 3G network real-time wireless network for data transmission.
(C) The central management platform for unified management system, distribution and end user permissions, manage streaming video data forwarding, data, information, interactive features.
2. Introduction car video surveillance system functions
(1) video real-time view Real-time view car terminals of the video images, the resolution may be on the video image, stream, frame rate, image quality adjustment parameters management.
(B) of the alarm processing Car video surveillance system is a major point emergency alarm, an alarm signal in the car terminal, the client software should immediately pop up truck outside the video image, and a voice alarm. In addition, the system should have the equipment failure alarm, speed alarm, alarm blocking, cross-border police and other police functions.
(C) the interaction data management Vehicle terminal and the central management platform for voice, video, pictures, text and other information exchange, to meet user demand for interactive advertising entertainment data.
(D) of the vehicle scheduling management
Monitoring center to locate the vehicle scheduling management, the big screen in the control center display vehicle location information, and according to road conditions where the vehicle reasonable dispatch management.
(5), data retrieval and analysis System can trace and analyze historical data, such as the history of video playback video retrieval, GPS positioning track playback, alarm data retrieval analysis.
3. Car Key technical features of video surveillance systems
(1) wireless video technology through a firewall
Operators to overcome the
About the Author
I am China Manufacturers writer, reports some information about grill thermometer fork , digital projection clock.
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