CN106713852A - Multi-platform wireless vehicle-mounted monitoring system - Google Patents
Multi-platform wireless vehicle-mounted monitoring system Download PDFInfo
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- CN106713852A CN106713852A CN201611119334.6A CN201611119334A CN106713852A CN 106713852 A CN106713852 A CN 106713852A CN 201611119334 A CN201611119334 A CN 201611119334A CN 106713852 A CN106713852 A CN 106713852A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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Abstract
The invention discloses a multi-platform wireless vehicle-mounted monitoring system, which comprises a video acquisition layer, a streaming media server forwarding layer and a monitoring client layer. In the video acquisition layer, an Android mobile phone client calls a mobile phone camera and an embedded type arm development board installed in a vehicle calls an externally-connected USB camera to transmit current images acquired in real time to a public network streaming media server through a wireless network. The streaming media server forwarding layer records and stores video information acquired from the front end while forwarding the video information to a monitoring terminal PC and an android client, realizes the display of multi-platform multi-path joint video monitoring, improves the safety of vehicle transport, and can meet the personalized demands of different users on different occasions. The multi-platform wireless vehicle-mounted monitoring system realizes functions such as user management, remote real-time video monitoring, video record playback and downloading, multi-channel deployment and configuration management, guarantees the safety of the vehicle and reduces the possibility of occurrence of illegal activities, and meets the requirements for real-time video monitoring on the vehicle and its surrounding of the intelligent transportation industry.
Description
Technical field
The present invention relates to a kind of multi-platform wireless vehicle-mounted monitoring system, more particularly to a kind of new wireless vehicle mounted monitoring system
Framework and specification are disposed, and belong to the communications field.
Background technology
In recent years with the arriving in big data mobile Internet epoch, the material conditions of people significantly improve, all kinds of
The related automobile of highway transportation, lorry, special transport vehicle are more and more, and communications and transportation and vehicle management pressure are increasing,
Traffic jam, vehicle crime, traffic accident, energy pollution and information do not become current problem demanding prompt solution freely, seriously
Have impact on the safety trip of people.Under this urgent background, each developed country of the world proposes miscellaneous ITS
(i.e. City ITS), by make rational planning for road transport network and the advanced detection of use, controls cutting edge technology, with
Alleviate the problem in communications and transportation, and as an important component in intelligent transportation, the monitoring remote video of vehicle
Play an increasingly important role, it can provide directly perceived, accurate, timely and abundant in content operation information, help optimizes line
Road, dispatch buses, frighten law-breaker and improve service quality.In today that China's road transport cause is booming, automobile
Recoverable amount remains lasting growth, in the end of the year 2013 up to 1.37 hundred million, the safety management of vehicle, safe operation and safety prison
The demand such as superintend and direct also to give birth to therewith, all big enterprises and fortune pipe portion door are increasingly becoming as the Vehicular video monitoring system of emerging market
Focus of attention.Analyzed according to traffic safety-security area authoritative department, long-distance vehicular video monitoring system is just towards platform and Protocol Standard
Standardization, video pictures Qinghua high, monitoring intelligent, integrated and service personalization the direction of systemic-function stride forward.Current information
Just with high speed development, the mode of video monitoring changes technology from manual to networking and intelligent direction, mobile interchange
The fast development of network technology makes the network bandwidth increase into geometry speed, and this was also for field of video monitoring was carried to more intelligent
Strong hardware ensures that following video monitoring development is to turn to demand with high definition, wireless, intelligence, to quality monitoring and region
Limitation proposes demand higher, so the multi-platform Multi net voting video monitoring system based on information technology is a new generation
The Main Means and developing direction of vehicle monitoring system.
Find that traditional Vehicular communication system can not meet the demand of people, using wireless network by market survey
The live video communication and management system of network are more exposed to the favor of user.With the progress of hardware technology so that hardware cost
Reduce, smart mobile phone and panel computer are extremely popularized, in this case, multi-platform based on mobile terminal and PC terminals
Wireless video communication system certainly will turn into the focus of Vehicular video communication system of future generation.For problem above, by linux system
The technology such as ARM9 microcontrollers, Android technologies, video coding and decoding technology and 4G mobile communication combine one kind can be provided
More effective monitoring system.ARM9 microcontroller performances are high and stabilization, technology maturation and with low cost；4G mobile communication technologies have
There is high bandwidth performance, can well meet Vehicular video data transfer Real-time Design requirement；H.264 employ what is increased income
The soft encoders of X264, coding efficiency is high, and modularized design scheme is easy to cut to reduce encoding operation complexity, while X264 is compiled
Code utensil has low bit- rate output characteristics, and network adaptability is good, is especially suitable for the serious wireless network environment of low bandwidth, packet loss.It is logical
The integration to three of the above technology is crossed, overcomes that embedded system treatability can low, network transfer speeds be slow, stream of video data
It is excessive to wait technology barrier, good real-time video result of broadcast is obtained, and system cost has been saved, meeting the premise of performance
Lower cost has obtained effective control, the numerous areas such as consumer electronics, security protection, medical treatment and nursing, military affairs is can be applied to, with wide
Market prospects.Can be by wireless network transmissions view data, without wiring, monitor node based on Embedded Network Video Surveillance
Can arbitrarily extend, just compensate for the deficiency of traditional video surveillance.
The content of the invention
Present invention aim at for above-mentioned the deficiencies in the prior art, it is proposed that a kind of multi-platform wireless vehicle-mounted monitoring system
System, the system is divided into three-decker, including video acquisition layer, streaming media server forwarding, monitor client layer.The video is adopted
Android phone client call mobile phone camera and the embedded arm development boards installed in the car are called circumscribed USB by collection layer
Camera sends to public network streaming media server, streaming media server forwarding the current picture of Real-time Collection by wireless network
Layer by front-end collection to video information carry out recording and storing while be forwarded to monitoring client PC and android clients, it is real
The display of existing multi-platform multichannel joint video monitoring, improves the security of vehicle transport, disclosure satisfy that different user difference field
The individual requirement of conjunction.The system is a kind of collection development of Mobile Internet technology, 4G technologies, video compression technology, Streaming Media and video
The technologies such as encoding and decoding are intended to facilitate personal management and the friendship of vehicle in the multi-platform vehicle-mounted monitoring application system of one, the system
The solution of logical transportation safety operation.The system uses C/S (Client/Servers) framework mode, its main design idea
It is to obtain gps data by situation in USB camera acquisition real-time vehicle and driver driving situation and by d GPS locating module
(i.e. longitude and latitude, height, time, speed) is while send arm processor to.And then H.264 the data to receiving are encoded simultaneously
The NAL unit that code will be finished sends streaming media server to, and streaming media server carries out RTCP encapsulation to the data compressed simultaneously
Built-in transfer server is sent to by internal bus.Terminal Server Client is connected by wireless network with transfer server, is used
Active X technologies realize the reception of video data and the decapsulation of RTP messages.By sending RTCP feedback informations, utilize
H.264 video decoding, realizes showing leading portion in real time depending on the video pictures for collecting in client media player and mobile phone A PP
Show, reach the purpose of multi-platform wireless monitoring.In background system management aspect, cloud platform is employed, with elastic telescopic, storage
Capacity is big, load balancing the advantages of, and server configuration can at any time be changed according to specific actual demand.
Video acquisition layer：This layer is the basis of whole system, in video acquisition layer, employs two kinds of acquisition modes, (1) peace
Tall and erect cell-phone customer terminal APP calling mobile phones camera gathers video data, by after data processing by heterogeneous network (i.e. 3G, 4G,
The heterogeneous networks such as WIFI) send to streaming media server.(2) vehicle-mounted embedded type arm development boards call circumscribed USB camera to gather
Video data, the data by wireless network after video compression coding by being sent to streaming media server.
Streaming media server forwarding：The Streaming Media clothes of oneself have been built based on the streaming media server EasyDarwin that increases income
Business device, this layer primarily serves an effect for relay forwarding, is the bridge for connecting video acquisition transmitting terminal and display terminal, at this
Layer can also realize the recording of video information, in the monitor video data that display terminal can be stored with vod server end.
Monitor client layer：Video display terminal is mainly used to show the picture that video acquisition layer shoots in real time, in the layer
Monitoring function is realized present invention employs two ways.First way is to realize that single channel is regarded by media player at PC ends
The broadcasting of frequency evidence shows, it is also possible to call Easyplayer players to realize the display of multichannel joint video data monitoring, the
Two kinds of modes can be to show the video pictures that leading portion shoots in real time whenever and wherever possible with mobile phone A ndroid clients app.
Present system using H.264 coding techniques and streaming media transmission technique, by 3/4G wireless transmitter modules by car
ARM plates external camera and the collection of mobile phone A ndroid clients are carried, the method for system treatment video information includes：
Step 1：In storing SD card, so that user locally checks the record data of video at any time；
Step 2：Local vehicle-carrying display screen is sent to by output interface, facilitate any angle check on demand video information with
And carry out necessary vehicle-state adjustment；
Step 3：Video pictures are sent to by far-end server by wireless communication module, video data is stored to computer room
Hard disk, in case the later stage retrieve for examination at any time；
Step 4：Monitoring client is forwarded to through streaming media server, to realize that monitor client layer carries out monitor in real time vehicle
Function；
Step 5：Based on Vehicular video monitoring APP, it is allowed to which user logs in APP and supervised whenever and wherever possible in the place for having network
Control, traffic information can be also sent to the relevant departments such as traffic police in real time.
This new multi-platform wireless prison that the present invention is realized based on heterogeneous network (i.e. the heterogeneous networks such as 3G, 4G, WIFI)
Control system, the system has convenience, mobility, isomerism, and functional diversities can meet the personalized need of user's each side
Ask.
Beneficial effect
1st, the present invention combines traditional monitor mode with mobile Internet and cloud storage technology, adheres to module
Change, service packet, the design concept of load balancing, realize user management, remote real-time video monitoring, playing back videos are with
The functions such as load, multichannel deployment and configuration management, have ensured vehicle safety and have reduced the possibility that illegal activities occur, can
Intelligent transportation relevant industries are met for vehicle and its demand of the real-time video monitoring of surrounding environment.
2nd, system of the invention possesses stronger flexibility and scalability, not only supports wireless vehicle mounted monitoring, is also available for
Vehicle operator shoots scene instantly and is sent to the monitoring client of traffic system in real time for traffic police's monitoring unit with mobile phone whenever and wherever possible
Door is monitored to traffic conditions, has reached vehicle efficiently management and the purpose of monitor in real time, improves the safety of vehicle transport
Property, the individual requirement of different user difference occasion is disclosure satisfy that, with wide application prospect.
3rd, the present invention is based on Embedded video monitoring system graft procedure system on development board platform, outside expander graphs
As acquisition system, wireless transmitting system carries out video acquisition, compression, transmission, with inexpensive, strong using flexible, autgmentability
Advantage, is with a wide range of applications and advantages for development in monitoring in the market.Android operation system is with Linux as bottom
The open source operating system on basis, the part of android system has：Operating system, user interface layout, middleware and application
Program software is constituted.Its basic framework form is software stack layers (Software Stack, also known as software lamination), is divided into bottom
Layer, intermediate layer and upper strata.For the selection of hardware, Android operation system has powerful compatibility, be free to selection
Hardware platform, Android development platforms opening principle causes that third party hardware vendor has broken away from the constraint of hardware device, does not receive
To the constraint of rule, so as to excite the innovative research of a large amount of developers, the application of many novel functions is generated therefrom
Program software, this provides greatly convenience to develop the Android cell phone clients of multi-platform vehicle-mounted monitoring system.
Brief description of the drawings
Fig. 1 is overall system design block diagram proposed by the present invention.
Fig. 2 is Linux_S3C2440 video acquisition terminals.
Fig. 3 is video acquisition flow chart.
Fig. 4 is video acquisition function flow chart.
Fig. 5 is android system block process.
Fig. 6 is H.264 to encode flow chart.
Fig. 7 is video decoding process figure.
Fig. 8 is client request server transmission data.
Fig. 9 is server function module flow chart.
Specific embodiment
The invention is described in further detail with reference to Figure of description.
As shown in figure 1, present system mainly includes video acquisition layer, streaming media server forwarding, monitor client
Layer, the system use C/S structures, mobile video acquisition terminal mainly include S3C2440 platforms on run gps data collection with
And coding, embedded web server, streaming media server, the Android mobile phone client of video acquisition, video, network transmission with
Built based on ICP/IP protocol, realize the host-host protocols such as RTP, RTSP, HTTP, TCP, UDP, remote monitoring client tier is realized
The functions such as decoding broadcasting, the network condition feedback of reception, video flowing to video data.
Monitoring system each several part design of the present invention includes as follows：
First, the design of the video acquisition module based on linux system
The composition of Linux acquisition terminals 4 parts as shown in Fig. 2 be mainly made up of:Arm processor, GPS module, 3G are wireless
Data transmission blocks, image capture module.16/32 risc microcontroller that main control processor chip is released from Samsung
S3C2440, S3C2440 use ARM920t kernels, the CMOS standards macroelement and memory cell of 0.13um, highest operation frequency
Rate reaches 400MHz, and its low-power consumption, simple, fastidious and full static state are designed exclusively for the application for needing to consider cost and power consumption
, particularly suitable the system.S3C2440 provides resource in abundant piece, supports Linux.The function being integrated on chip has:
The instruction and data Cache of 16KB, lcd controller, AC97 COBBAIFs, utilizing camera interface, dma controller, PWM timers,
MMC interfaces etc..It can complete the traffic control of whole system, all functions of needing operating die are configured in system electrification and is deposited
Device, completes the coding of video flowing, and send video code flow to monitor terminal by 3G wireless networks.
Embedded arm development boards S3C2440 calls circumscribed USB camera to gather video data, and the data are after treatment
Streaming media server is transferred to by wireless sending module.Specific deploying step：
(1) virtual machine ubuntu, the installation of cross compile chain
The ubuntu source files of latest edition can be downloaded in ubuntu official websites, can be put up after download is compiled virtual
Machine, the system-level file of all virtual machines is updated in terminal input sudo apt-get update；Arm development boards institute is downloaded
The cross compile chain of needs, after installing, just can realize to carrying out cross compile between arm development boards and virtual machine ubuntu
Exploitation.
(2) embedded Linux kernel transplanting
Linux kernel is the core of linux system, for system hardware provides driving and DLL, while for user compiles
The application program write provides running environment.Linux has very strong adaptability to hardware platform, and is easy to transplanting.Interior caryogamy
Put and kernel option selected according to project demands typically, it would be desirable to core option be saved in configuration file, compile
When translating kernel, kernel will be compiled according to configuration information.This module needs configuration USB camera to drive, file system
Information.After kernel information is configured, into kernel catalogue, perform make clean and remove original kernel compiling file execution
Make ulmage ARCH=arm CROSS_COMPILE=arm-linux-gcc compiled ulmage kernel image files
It is placed under arch/arm/boot catalogues, ulmage is copied to/tftpboot is for downloading.Under U-Boot order lines, hold
Line command tftp cOOOSOOO ulmage bootm cOOOSOOO ulmage are embedded by ulmage programmings to Nandflash
Formula linux system is made up of linux kernel and root file system two parts, and Neither of the two can be dispensed.File system includes number of files
According to, library file, configuration file catalogue, be flexible coupling, the subregion of carry first is exactly root file system after linux system starts,
There is no root file system, kernel cannot start.Linux environment builds U-Boot, linux kernel, the file system of needs
All complete.Jian hair plates and virtual machine are coupled together using serial ports, by above file programming in hyper terminal
To S3C2440 development boards.
(3) video acquisition module design
The effect of video acquisition module is to read view data, the single handkerchief image that will be collected from USB camera buffering area
Store, be that local echo module and transport module provide data.Video acquisition module includes adding for webcam driver module
The design of load and the video acquisition program based on V4L2.Webcam driver is compiled into kernel, just can be with after drive load success
Operation is written and read to camera by interface function.It is fixed in order to user easily gathers audio/video flow in linux kernel
Justice a kind of DLL, i.e. VL42.For program developer, it have ignored the feature of hardware device, and offer one is
Row interface function is operated to different hardware.For audio/video flow, V4L2 provide special api function realize collection and
Treatment, and support is provided to polytype multimedia equipment, after adding driver in kernel, it is possible to use V4L2 moulds
The api interface function pair camera of block is operated, and obtains camera data, to realize single handkerchief image and many handkerchief consecutive images
Bian collection.V4L2 is the modified version of V4L, has repaired the weak point of the latter.Kernel from after 2.5 versions, just with the addition of to V4L2
The support of interface.V4L2 makes the logicality of programming stronger using the mode of operation of order, and its operating process is as shown in Figure 3.These
Operation is all by constantly calling ioctl () function to realize.
After the completion of video Bian collection, in order to preferably observe the image information for collecting, local echo module is devised, will taken the photograph
As the data display of head collection is on development board screen.Process for convenience, schemed by the jpeg of libjpeg decompression buffers
Picture, and bmp images are converted into, zoom to the size of suitable S3C2440 screens, rgb format is converted into yuv format, pass through
FFmpeg carries out Video coding, is displayed on screen.The flow of program is as shown in Figure 4:
(4) video stream data is sent
Image is included in arm plate LCD liquid crystal displays by calling local echo module after the collection of camera video stream
On, while calling x264 compressed encodings storehouse, initial data is compressed coding, Easypusher functions are called, will compress
Video data transmitted to streaming media server by wireless transport module.
2nd, Android video acquisitions and monitoring system function module design scheme
The video acquisition of android system is logged in monitoring module Program and mainly sent really from Socket to server
Recognize, to judge both sides' identity, then Android ends start the video data file for receiving to be sent from service end, and are saved in phase
In the buffer zone module answered, then data decoder module is decoded to the video data file in buffering area.In Android visitors
The summed data transmission of asking that instruction is employed in the end of family uses different ports respectively, can so avoid because user's operation is excessive
Caused by data transmission bauds decline, be effectively guaranteed the real-time of data transfer, reduce whole application program and exist
The situation of delay and data congestion in use.Shown in idiographic flow below figure 1-5:
3rd, video data coding/decoding module and transmission of video agreement in the monitoring decorum
The compression coding of video data:During actual transmissions, H.264 the present invention, from H.264 coding standard, is a kind of
A kind of means to Moving picture compression of high compression rate, while the network environment of Various Complex is adapted to, the requirement to bandwidth
It is very low, ensure that on the premise of minimum bandwidth resource is taken, there is provided the video image of first water.In current coding staff
H.264 it is a kind of optimal selection for being integrated with many algorithms and multimedia technology in formula, is more satisfactory compressed encoding side
Formula.Thus, coding is compressed to video data using H.264 coded system in the design system.What video compress was used
H.264 coding flow is as shown in Figure 6：
The decoding of video data:During video data transmission, what Video decoding module was received is from server
The video stream file of the H.264 coded format that end sends, but the solution of H.264 form is not supported in android system
Coded program, therefore decoding related work will be realized by code.Writing for decoding storehouse is in calling H.264 decoder by JNI
Part Methods, optimized using the mode of JAVA and C/C++ hybrid programmings using NDK tool sets, final application is in program
In Decoding function blocks in, implement flow as shown in Figure 7：
Host-host protocol in video monitoring system mainly divides two large divisions:The transmission of request instruction and the biography of video data
It is defeated.The transmission for wherein instructing is based primarily upon ICP/IP protocol, and two different transport layer protocols of TCP and UDP are included in this agreement,
Central TCP is that reliably, towards the transmission control protocol for having connection, it is first passed through " three-way handshake of TCP " before data transfer
Reliably connection mechanism is set up, so as to ensure that the reliability that the request instruction from client-side program to server end sends；UDP
Refer to the Connectionless Transport Protocal between packet, be a little fast transmission speed, processing speed is fast, and message format is relatively simple
It is single, it is suitable for the transmission of video data file, but data packet disorder is there is, the problems such as message dropping, therefore in this base
Ensure the high-quality of video data on plinth using multimedia real-time transmission agreement RTSP.Idiographic flow is illustrated in fig. 8 shown below:
The combination of RTSP agreements and udp protocol applies to the conventional typical module of video file transfer, is entered using RTSP
Encapsulation of the row to multimedia data stream, and then communications are carried out using udp protocol, played for media stream and provide communication guarantor
Barrier.
4th, the design of streaming media server functional module
What this module mainly introduced streaming media server builds design.The effect of the module is video stream data frame
Forwarding, sends to client after the video stream data of front-end collection is transmitted through public network and monitors receiving terminal.If in PC PC
On build streaming media server, effect is bad, because leading portion data acquisition needs that video flowing is dealt into the IP address specified
And in port numbers, in actual life, either the IP address inside cell or company or school be all LAN, it is necessary to
Arp address resolution protocol can just make on the IP of the machine that public network IP address is mapped in LAN, increased server location
Limitation based on network signal quality and increase the time delay of video streaming.Therefore streaming media server is built in selection
On the cloud platform server of Ali's cloud, type of server is easydarwin streaming media servers.The streaming media server of increasing income
It is that EasyDarwin increases income the streaming media service part of steaming media platform, the open source projects Darwin based on Apple
Streaming Server develop and extension, EasyDarwin support standard RTSP/RTP/RTCP agreements, possess RTSP/RTP
The function such as program request, live (push-model and pull-mode), supports that HLS is live, adapts to the terminal platforms such as Android, IOS, wechat be live,
At utmost press close to safety monitoring, mobile Internet Streaming Media demand；EasyDarwin itself provides one it is high performance flat
Table frame, the cross-platform supports of Linux/Windows are the splendid framework works for developing streaming media service and other types service
Tool；EasyDarwin possesses the network I/O frameworks and Utility of complete set, and developer is easy to EasyDarwin's
On the basis of develop the system platforms such as cross-platform service routine, such as Windows, Linux, Mac, Solaris, as long as once ripe
Know, it will benefit from lifelong, and dispose and development process is simple, document and support complete, be internet+epoch, to enterprise and
For developer, the streaming media server of increasing income of gas is most grounded.
In the compiling of platform streaming media server, configuration, the method disposed
1st, EasyDarwin latest editions are obtained
In Github：https:Obtain newest in //github.com/EasyDarwin/EasyDarwin
EasyDarwin version source codes, are voluntarily compiled into the executable file of needs, it is also possible to directly in https://github.com/
The respective version filed is downloaded in EasyDarwin/EasyDarwin/releases to be disposed；
2nd, EasyDarwin latest editions are compiled
Version of window is compiled, can directly with the opening sound code files of Visual Studio 2008：/
EasyDarwin-master/EasyDarwin/WinNTSupport/EasyDarwin.sln solution files, compile out
Exe executable files EasyDarwin.exe；
Linux version is compiled：
cd./EasyDarwin-master/EasyDarwin/chmod+x./Buildit./Buildit
cd./x64(or cd./Release)
The treatment of this server end main responsible initial data in whole monitoring system, stores subscriber data file and regards
The forwarding of frequency flow data, is the tie for connecting video data acquiring end and client's monitoring client.Receive video and adopt when server is connected
Collection end is encoded to process the frame of video picture that transmits, is then directly entered buffering area, the video data in buffering, when connecing
To the request instruction from client, sent to client-side program by video sending module.The data on user are believed simultaneously
Breath is also stored in the database of server end.Whole flow process is as shown in Figure 9.
In order to preferably realize streaming media server function, the present invention has built EasyRMS realizations in streaming media server
Video flowing to receiving carries out the function of recording and storing, and monitoring video is retrieved for examination when needed with standby user.
EasyRMS be EasyDarwin increase income steaming media platform video recording with playback service, can directly dock security protection and take the photograph
Camera, EasyDarwin streaming media servers, other standards RTSP services, based on HLS protocol, video recording is stored as ts streams, supports
It is locally stored and stores (i.e. OSS cloud storages) with Ali's cloud object, interface interchange is very simple, framework flexibly, and is highly susceptible to
Extension, developer can be extended with EasyRMS, develop into the cloud storage service of oneself needs.
Claims (3)
1. a kind of multi-platform wireless vehicle-mounted monitoring system, it is characterised in that the system includes video acquisition layer, streaming media service
Device forwarding, monitor client layer：
Video acquisition layer employs two kinds of acquisition modes, (1) Android mobile phone client APP calling mobile phones camera collection video counts
According to by being sent to streaming media server by heterogeneous network after data processing；(2) vehicle-mounted embedded type arm development boards call outer
USB camera collection video data is connect, the data by wireless network after video compression coding by being sent to streaming media service
Device；
Streaming media server forwarding is to have built the streaming media service of oneself based on the streaming media server EasyDarwin that increases income
Device, the layer is a relay forwarding, is the bridge for connecting video acquisition transmitting terminal and display terminal, can also realize regarding in the layer
The recording of frequency information, in the monitor video data that display terminal can be stored with vod server end；
Monitor client layer is used for the picture that display video acquisition layer shoots in real time, employs two ways in the layer to realize prison
Control function, first way is to realize that the broadcasting of single channel video data shows by media player at PC ends, it is also possible to called
Easyplayer players realize the display of multichannel joint video data monitoring, and the second way is with mobile phone A ndroid client
End app shows the video pictures that leading portion shoots in real time whenever and wherever possible.
2. a kind of multi-platform wireless vehicle-mounted monitoring system according to claim 1, it is characterised in that the system uses C/
S structures, mobile video acquisition terminal mainly includes the gps data collection run on S3C2440 platforms and video acquisition, video
Coding, embedded web server, streaming media server, Android mobile phone client, network transmission is based on ICP/IP protocol
Build, realize RTP, RTSP, HTTP, TCP, UDP host-host protocol, remote monitoring client tier realize reception to video data,
The decoding broadcasting of video flowing, network condition feedback function.
3. a kind of multi-platform wireless vehicle-mounted monitoring system according to claim 1, it is characterised in that the system treatment is regarded
The method of frequency information includes：
Step 1：In storing SD card, so that user locally checks the record data of video at any time；
Step 2：Local vehicle-carrying display screen is sent to by output interface, facilitates any angle to check video information on demand and enter
The necessary vehicle-state adjustment of row；
Step 3：Video pictures are sent to by far-end server by wireless communication module, video data is stored hard to computer room
Disk, in case the later stage retrieve for examination at any time；
Step 4：Monitoring client is forwarded to through streaming media server, to realize that monitor client layer carries out the work(of monitor in real time vehicle
Energy；
Step 5：Based on Vehicular video monitoring APP, it is allowed to which user logs in APP and is monitored whenever and wherever possible in the place for having network,
Also traffic information can be in real time sent to relevant department.
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| CN107483818A (en) * | 2017-08-15 | 2017-12-15 | 上海蔚来汽车有限公司 | Automobile and vehicle-mounted image-taking system, image processing system, correlation technique |
| CN107968935A (en) * | 2017-12-13 | 2018-04-27 | 太仓鼎诚电子科技有限公司 | A kind of network video monitor and control system based on ARM9 |
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