CN101561969A - Events video monitoring guiding and issuing method and system thereof - Google Patents
Events video monitoring guiding and issuing method and system thereof Download PDFInfo
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Abstract
The invention relates to an events video monitoring guiding and issuing method and a system thereof, and the system comprises a traffic information collecting system, a signal processing and control system, a signal sending and transmitting system and a user terminal system. The method comprises the following steps: 1) the traffic information is collected on roads and scenic spots to be monitored; 2) the collected information is processed and assessed; 3) the information is sent to a terminal. In the step 1), one or a plurality of video collecting devices are adopted for collecting video information of the roads and the scenic spots; in the step 2), the obtained monitored video streams with one or a plurality of formats are converted to a H.264 multi-program stream; meanwhile, the traffic condition is assessed according to the obtained video information of the step 1); a signal lamp of a corresponding intersection is controlled according to the analysis result, and a traffic status assessment figure of the roads to be monitored is generated; and in the step 3), the H.264 multi-program stream is sent to the terminal through one or a plurality of network ports. The invention has wide application range, small code stream redundancy, small bandwidth and high transmission rate.
Description
Technical field
The invention belongs to the intelligent transport technology field, being particularly related to man-machine interaction (MMI), multi-medium data flow transmission, the broadband wireless networkization technology such as (WLAN, WiFi, WiMAX, CMMB, 3G) at video monitoring, isomery image transcoding, map vector interface, specifically is video monitoring guiding and dissemination method and system that a kind of Video Events that merges based on many nets detects the transcoding map vector.
Background technology
Along with rapid development of social economy, the popularizing gradually of the various vehicles, the traffic development degree is more and more higher, brings great convenience for people's life.Yet being doubled and redoubled of vehicles such as city commercial vehicle, private car, bus, taxi also caused urban traffic conditions to go from bad to worse, and it is serious to block up.Under this situation, how in time to grasp real-time road condition information, and select best trip route, be the problem that people are concerned about the most, also be a current difficult problem that presses for solution.So, for to highway, national highway, the traffic of city arterial street and intersection has one comprehensively to understand, and according to crossing congestion situation real-time monitoring signal lamp, guide human pilot to select a best trip route, be necessary to develop video monitoring guiding and the delivery system of a cover, the entire city road conditions based on the event detection transcoding map vector of many nets fusions, information such as tourist attractions are real-time is sent to car-mounted terminal, personal hand-held equipment (PDA), the GSM/GPRS mobile phone, the CDMA mobile phone, 3G mobile, office building LCD, various user terminals such as mobile TV.
Fixed network and mobile network the new demand and the new trend that merge have occurred when advancing separately.Multiple network interdependences such as television network broadcast, communication network, computer network, cellular mobile network, satellite WAN, broadband radio access network, mobile ad-hoc network, interpenetrate, vie each other, promoting advancing of information age.Under this background, many nets convergence platform technology is arisen at the historic moment, representing the developing direction of next generation network, make network world move towards complicated involution again in a complete unified system by simple, for described Video Events detection/isomery transcoding/map vector monitoring guide and delivery system, provide network foundation.
H.264/AVC be the video compression standard of developing jointly by ITU-T and ISO/IEC video experts group of new generation.It proposes at present multimedia communication, storage demand, and the high-quality video of different code checks from low to high can be provided, the Moving Picture Experts Group-2 of comparing, and under equal quality, its code check can save 1/4～1/2.Simultaneously, ratio of compression H.264 be MPEG-4 1.5-2 doubly.Such as, if the size of source document is 100GB, becoming 4GB after the compression of employing MPEG-2 compression standard, ratio of compression is 25: 1, H.264 becomes 980MB after the compression standard compression and adopt, ratio of compression is 102: 1.Low code check is given the superelevation ratio of compression that H.264 brings, and can save the charge of terminal user's download time and data traffic greatly.Moreover, when having very big ratio of compression, image H.264 still keeps high definition, can satisfy the demand of practical application.
Current, the code stream of field of video monitoring is many to have other forms such as MPEG-4 concurrently based on MPEG-2, the monitoring video flow of high code check can be converted in real time to the H.264 video of low code check, and guarantee its monitored picture quality; Consider the actual conditions of transfer bandwidth and various receiving terminals simultaneously, reduce the resolution of video flowing simultaneously at transcoding, to utilize the more clients of resource service such as limited mobile communication, Internet network and communication network, allow the terminal user who is under the different condition can both obtain accurate, instant traffic information; And on this application foundation, make up monitoring road conditions, multimedia messages delivery network widely, be convenient for people to select best trip route, to solve the difficult problem of trip.
Summary of the invention
The objective of the invention is to, a kind of video monitoring guiding and dissemination method and system of the event detection transcoding map vector that merges based on many nets is provided, will be applied to road network monitoring and multimedia messages based on transcoding technology H.264 and issue the field.Vision signal by signal Processing and control system (data center) is handled, the asynchronous access of multiple terminal user, high-quality video compress signal transmission, realize high-level efficiency, the issue of high quality multimedia information, for people provide in time, traffic information or tourist attractions tour guide information accurately.Concrete technical scheme is as follows:
A kind of video monitoring guiding of incident and dissemination method and system comprise step: 1) traffic information collection is carried out at the road and the scenic spot of needs monitoring; 2) institute's Information Monitoring is handled, assessed; 3) described information is sent to terminal.Specifically,
In the described step 1), adopt one or more video capture devices to gather the video information at road and scenic spot;
Described step 2) in, the monitoring video flow of one or more forms that step 1) is obtained changes into one tunnel Polymera stream H.264;
Simultaneously, obtain video information, road conditions are assessed according to step 1); Control the signal lamp of corresponding intersection again according to analysis result, and generate the traffic status assessment figure that needs the monitoring road;
In the described step 3), Polymera H.264 spread give terminal and transmit by one or more network ports.
In the described step 1), video information is admitted to the digital video host process earlier, handles the corresponding single-unit order transmission code stream TS that obtains; The form of described single-unit order transmission code stream TS comprises MPEG-2 and/or MPEG-4.
In the described step 1), the single-unit order transmission code stream TS of described one or more forms is step 2) in road conditions are assessed required monitoring code stream; Step 2) in, road conditions is assessed content comprise: the vehicle flowrate and the speed of a motor vehicle of the congestion of road, the visibility of road, road.
Described step 2) in, the single-unit order transmission code stream TS of one or more forms is changed into one tunnel Polymera stream H.264, be to the input single channel or multichannel single-unit order transmission code stream TS carries out video code conversion successively, video flowing is multiplexing and demultiplexing and multichannel program multiplexing H.264, export one tunnel Polymera stream H.264 at last.Concrete steps are as follows:
Earlier video flowing is resolved: utilize H.264 Macroblock Mode Selection and the correlativity between the MPEG-2/MPEG-4 motion compensated residual, H.264 the selection of macro block mode is converted into data qualification, and the motion compensated residual, MB pattern, the coded block pattern that promptly utilize the MPEG-2/MPEG-4 decoding to obtain are mapped directly to macro block mode H.264; Decoder module is preserved relevant MB information, comprises the average and the variance of MB coding mode, encoding block type, MB residual error;
The H.264 scrambler that described H.264 coding is the employing standard obtains H.264 middle macro-block coding pattern to the YUV picture coding by decision tree; During coding,, and preserve H.264MB coding mode, thereby export H.264 code stream the coding mode indirect assignment of MB.
A kind of video monitoring guiding and delivery system of realizing the incident of said method comprises road conditions information gathering system, signal Processing and control system, signal emission and transmission system and client terminal system.
Described road conditions information gathering system comprises one or more rig cameras and digital video main frame, and the video information of each rig camera output is imported the video main frame into;
Described signal Processing and control system comprise center signal scheduling processing and road conditions signal evaluation regulator system:
1) center signal scheduling processing subsystem comprises: signal dispatching matrix, scrambler, CPU (signal controlling manager), packing device and video code conversion module H.264; Described CPU connects and is used for the storer of stored data base; Also comprise the signal monitoring testing apparatus, the signal monitoring testing apparatus is assessed to system internal test with to the operation conditions of watch-dog, and sends the result to CPU.
CPU to signal dispatching matrix, scrambler, signal monitoring testing apparatus, packing device, storer and H.264 the video code conversion module manage, carry out uploading, move and managing of material simultaneously, and clock sequence be provided; The vision signal input signal dispatch matrix of described video main frame output; Scrambler carries out fusion treatment to video flowing between signal dispatching matrix and CPU; H.264 the video code conversion module is finished the conversion H.264 of all size TS flow direction; Packing device connects CPU, and the H.264 format video stream packing with H.264 video code conversion module output comes announcement information emission and transmission system by message queue;
2) road conditions signal evaluation regulator system comprises traffic information assessment regulation and control module and signal lamp regulation and control module, the Video stream information that traffic information assessment regulation and control module provides according to center signal scheduling processing subsystem, the road conditions situation is analyzed, sent control information to described signal lamp regulation and control module again.
Described signal emission comprises man-machine interactive platform (being worktable), control module, protocol module and one or more network ports with transmission system; Described control module connects the control man-machine interactive platform and the network port, and the protocol module input end connects the output terminal of described packing device, and the protocol module output terminal connects the network port.
Described signal dispatching matrix is greater than 64 * 64.Described storer is a disk array, when storage data, data is cut into many sections, leaves in respectively on each hard disk.
The network port comprises: 3G network port, cdma network port, the GSM/GPRS network port, the CMMB network port, Broadcast Port, WLAN port, WiFi port, bluetooth port and internet side mouth.
Described subscriber terminal equipment comprises: personal hand-held equipment PDA, 3G mobile, GSM/GPRS mobile phone, CDMA mobile phone, notebook, mobile TV, radio, office building LCD terminal and car-mounted terminal.
The attainable major function of described system is as follows:
1. at a high speed, national highway, the traffic information collection of arterial street, street and intersection;
2. at a high speed, national highway, the transport information of arterial street, street and intersection is handled and assessment, particularly with the monitoring video flow of various forms, changes into the H.264 code stream of low code check;
3. scenic spot information, the issue of road network road conditions.Break away from the yoke of traditional graphics context mode, replace to look the information guide that audio frequency is a carrier, for the user provides real-time traffic and tour guide information;
4. based on map vector close friend's human-computer interaction interface (MMI) and multi-lingual function, realize user and data center's interaction.
Beneficial effect of the present invention has, and reduces code stream redundancy, saves bandwidth, increases transfer rate.
Advantage of the present invention and characteristic are:
Utilize to have monitoring collection of resources real-time road condition information now, utilize conventional network resources transmission TS stream, not only economical, saving, and feasibility height;
Description of drawings
Fig. 1 is a native system general structure synoptic diagram;
Fig. 2 is the road conditions information gathering system schematic;
Fig. 3 is signal Processing and control system (data center) synoptic diagram;
Fig. 4 is a signal controlling manager synoptic diagram;
Fig. 5 is information emission and transmission system synoptic diagram;
Fig. 6 is various subscriber terminal equipment synoptic diagram;
Fig. 7 is a video code conversion module frame chart H.264;
Fig. 8 is based on the traffic information interactive interface synoptic diagram of map vector;
Fig. 9 is that Video Events detects synoptic diagram.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.
The video monitoring guiding and the delivery system of event detection transcoding map vector, this system realizes the video monitoring guiding and the dissemination method of incident of the present invention, comprises road conditions information gathering system, signal Processing and control system (data center), signal emission and transmission system, client terminal system.Wherein:
Described " road conditions information gathering system " constitutes by becoming rig camera such as times one video camera, clipping the ball video camera, dome type camera, thermal camera and digital video main frame.
Described signal Processing and control system (data center) comprise that signal dispatching matrix, scrambler, signal monitoring testing apparatus, packing device, CPU (containing the signal controlling manager), disk array (database), traffic information assessment regulation and control module, signal lamp regulation and control module, user management module constitute.Be particularly related to H.264 video code conversion module, this module is responsible for the TS stream (Transmit Stream transmission code stream) of all size is changed into the high H.264 code stream of ratio of compression, receives with convenient transmission and terminal user.
Described signal emission is made of worktable, control module, protocol module and diverse network port with transmission system.The network port comprises: 3G network port, cdma network port, the GSM/GPRS network port, the CMMB network port, Broadcast Port, WLAN port, WiFi port, bluetooth port and internet side mouth.Wherein, Broadcast Port is used for sending the TS stream that comprises traffic information to broadcast system, and the terminal user is provided.
Described subscriber terminal equipment a guy handheld device (PDA), 3G mobile, GSM/GPRS mobile phone, CDMA mobile phone, notebook, mobile TV, radio, office building LCD terminal, car-mounted terminal or the like.
Described road conditions information gathering system is by being built up in the video camera (monitoring level at main traffic artery and crossing, general medium-sized city needs about the 30-50 platform, large size city is more) the collection real-time road, comprise vehicle flowrate, unobstructed congestion, visibility or the like, and the road conditions signal is sent to the signal dispatching matrix of data center in real time by transmission system, for signal dispatching, processing.Wherein, the real-time road signal transmits and can use optical fiber transmission broadband system.
Described signal Processing and control system (data center) mainly comprise center signal scheduling processing and two subsystems of road conditions signal evaluation regulation and control.Center signal scheduling processing subsystem is by signal dispatching matrix, scrambler, CPU (containing the signal controlling manager), signal monitoring testing apparatus, packing device, H.264 video code conversion module, disk array (database) and user management module are formed.With multichannel real-time road signal input signal dispatch matrix (requirement possesses more than 64 * 64), realize that flexible switching scheduling, signal compression packing, the transmission of multiple signals is multiplexing.Wherein compression can be adopted and take out frame (or picture) mode to reduce data volume.Road conditions signal evaluation regulator system comprises traffic information assessment regulation and control module, signal lamp regulation and control module.By the road conditions signal of real-time collection, finish the crossing congestion situation and quantize, assess, send the traffic status assessment figure of belisha beacon real time remote regulation and control instruction, generation city arterial street and intersection.Road conditions signal evaluation regulator system possesses following function:
In described signal Processing and the control system (data center), the present invention proposes H.264 video code conversion module, transfer ratio of compression height, H.264 code stream that code check is low in real time to the TS stream of realizing specifications such as MPEG-2, MPEG-4.The single program stream of input multichannel MPEG-2 or MPEG-4, export one tunnel Polymera stream H.264, realize MPEG-2 or MPEG-4 to H.264 video code conversion, video flowing multiplexing with demultiplexing, multichannel program multiplexing H.264, its video code conversion comprises code check, resolution and form transcoding.
Described signal emission is responsible for the multiplexed signals that received signal is handled and control system (data center) transmission comes with transmission system, according to corresponding ICP/IP protocol, the TS that will comprise detailed traffic information via various ports such as 3G network port, cdma network ports spreads to 3G network, cdma network, GSM/GPRS network, CMMB network, WLAN, WiFi, bluetooth and the Internet.
Described client terminal system by corresponding network, such as the Internet, 3G network, cdma network or the like, can receive real-time, accurate road information.And can carry out interaction by close friend's MMI and data center, to obtain detailed traffic information.The radio terminal receives the audio frequency traffic information by broadcast system; Office building LCD terminal receives TS stream by Internet, bluetooth or WLAN, and is transferred to the LCD in the building; Car-mounted terminal receives TS stream by CMMB network, bluetooth, WLAN.
In this example,
As Fig. 1, native system mainly contains road conditions information gathering system, signal Processing and control system (data center), signal emission and transmission system, client terminal system.Described change times one video camera, clipping the ball video camera, dome type camera, thermal camera and digital video main frame constitute the road conditions information gathering system.The camera acquisition real-time road comprises vehicle flowrate, unobstructed congestion, accident situation, visibility situation etc.The video flowing of camera acquisition is transferred to signal Processing and control system (data center) via the transfer of digital video main frame, fusion.
With reference to figure 2, the digital video main frame is supported compression standards such as MPEG-2, MPEG-4, supports 4:2:2 or 4:2:0 sample frequency, the long GOP code check in the 4Mbps-25Mbps scope, coding, decoding are integrated, and can support 8 two-way MPEG-2/MPEG-4 codings, decoding at most.This digital video main frame can be used existing software and realize on PC, perhaps this software is burnt in the relevant hardware equipment and realizes, for example based on the hardware system of ARM.
Signal Processing as shown in Figure 3 and control system (data center):
Described signal dispatching matrix adopts the distributed multi-stage matrix structure, reception is from the monitoring video flow at each road and scenic spot, its internal core comprises the dispatch matrix of input and output matrix, two complete mirror images of master control matrix at least, to realize the integrated dispatch and the backup of external signal in the data center.
Described scrambler carries out fusion treatment to monitoring TS stream between signal dispatching matrix and signal controlling manager so that H.264 the real-time realization MPEG-2/MPEG-4 of video code conversion module to H.264 video code conversion.The software that can have of scrambler is realized, also can be burnt to corresponding software in the hardware and realize, can utilize the prior art programming to realize above-mentioned functions than being easier to.
Described signal monitoring testing apparatus is made up of multiselect one matrix, signal-testing apparatus, Signals Data Base.Be responsible for system internal test, to the operation conditions of watch-dog, assess, and the result is transmitted described signal controlling manager.The signal monitoring testing apparatus constantly detects the signal that needs are paid close attention to, the signal that all need detect, by multiselect one matrix, output to signal-testing apparatus, testing apparatus is measured the parameter of signal, and with database in the standard of preserving compare, thereby whether the result who determines test within allowed band.Such as, can select the WVR6100 type equipment of Tektronix for use.
In view of common hard disk, on capacity and speed, can't catch up with the needs of CPU and system, described database adopts disk array (RAID) technology, utilizes the array mode, cooperates the design of data dispersed arrangement, promotes safety of data.The addition effect that RAID utilizes indivedual disks to provide data to produce promotes the usefulness of whole magnetic disk system.Simultaneously, when storage data, utilize this technology, data are cut into many sections, leave in respectively on each hard disk.It is direct-connected or link to each other with main frame by network outside main frame that described memory device can be used as autonomous system.
Described H.264 video code conversion module is finished the conversion H.264 of all size TS flow direction.Be characterized in importing the single program stream of multichannel MPEG-2 or MPEG-4, export one tunnel Polymera stream H.264, realize MPEG-2/MPEG-4 to H.264 video code conversion, video flowing demultiplexing and multiplexing, multichannel program multiplexing H.264, its video code conversion comprises the conversions of code check, resolution and form.Referring to accompanying drawing 7.
Described packing device and CPU (containing the signal controlling manager) and database carry out alternately, with the H.264 form monitoring TS stream packing of H.264 video code conversion module output, launch and transmission system with announcement information by message queue.By other packing device in the reference prior art, can realize the packing device of above-mentioned functions by writing software than being easier to.
Described CPU (containing the signal controlling manager) finishes signal dispatching matrix, scrambler, signal monitoring testing apparatus, packing device, disk array and the H.264 management of equipment such as video code conversion module, realize uploading, move and managing of material simultaneously, and clock sequence is provided.
Described user management module manages the terminal user.Be responsible for landing, register and charging of user.User management module provides friendly human-computer interaction interface (MMI) to supply end user query, mutual with central server simultaneously.
Described traffic information assessment regulation and control module, the Video stream information that provides according to center signal scheduling processing subsystem is analyzed (comprise unobstructedly block up, visibility, vehicle flowrate or the like) to the road conditions situation, and to described signal lamp regulation and control module transmitting control information.According to concrete road conditions standard, corresponding program is comparable to be easier to realize this function by writing.
The information that regulation and control such as described signal module received signal lamp is regulated is regulated and control each belisha beacon, to regulate road conditions.
As Fig. 4 is the signal controlling manager:
Described interface module is responsible for the reception and the output of TS code stream, test signal, is responsible for mutual with disk array.
Described buffer module to the request of each external module, generates message queue.
Described central processing unit is finished the scheduling of each module, information processing, and send orders such as material is uploaded, migration to interface module.
Described auxiliary dispatching module assists central processing unit to finish work such as scheduling, calculating, processing when the central processing unit process blocking.
Described clock module is that total system generates clock sequence.
Information emission and transmission system as Fig. 5:
Described worktable for field technician, managerial personnel provide the near-end human-computer interaction interface, is realized condition monitoring and the operation of managerial personnel to local network, and link protocol remote maintenance interface is provided.
Described protocol module support " the H.264 monitoring TS stream of data center " is transferred to each terminal network, comprises the digital moving-tv network, as the CMMB network; 3G network is as WCDMA/CDMA200/TD-SCDMA network and existing CDMA/GSM/GPRS network and Internet network or the like.Protocol module is support terminal user's telnet and data access simultaneously.
Described control module auxiliary table is realized man-machine interaction, map vector mapping, simultaneously the above-mentioned protocol module and the network port is managed.
User terminal inserts data center by corresponding network, can obtain traffic information.As shown in Figure 6, be example with the GSM/GPRS mobile phone:
Described GSM/GPRS Virtual network operator, receive real-time traffic information video flowing by the described GSM/GPRS network port, comprise the city arterial street of road conditions signal evaluation regulator system generation and the traffic status assessment figure of intersection, comprise the human-computer interaction interface (MMI) that user management module provides.Operator can adopt following dual mode to pass to the terminal user:
User management module provides friendly MMI and multi-lingual selection function.The GSM/GPRS terminal user lands the server of data center, clicks the interface, can obtain real-time, accurate road information.
Car-mounted terminal receives the traffic information that system of the present invention issues by broadcasting, CMMB network, WLAN, bluetooth.By the LCD interface of car-mounted terminal, the user can carry out real-time interactive with data center equally.Driver on taxi, public affair, commercial vehicle, the private car, visitor take advantage of personnel to pass through mobile phone, PDA also can obtain real-time road.
H.264 video code conversion module frame chart as shown in Figure 7:
Described MPEG-2, MPEG-4 and other form code stream are the monitoring code stream of road conditions information gathering system acquisition;
Described decoder module is finished the parsing to described MPEG-2, MPEG-4 and other form code stream; Utilize H.264 Macroblock Mode Selection and the correlativity between the MPEG-2/MPEG-4 motion compensated residual, H.264 the selection of macro block mode is converted into data qualification, and the motion compensated residual, MB pattern, the coded block pattern (CBPC) that utilize the MPEG-2/MPEG-4 decoding to obtain are mapped directly to macro block mode H.264.Decoder module is preserved relevant MB information, comprises the average and the variance of MB coding mode, encoding block type (CBPC), MB residual error.
H.264 the scrambler of the described employing standard of H.264 encoding obtains H.264 middle macro-block coding pattern to the YUV picture coding by decision tree.During coding,, and preserve H.264MB coding mode, thereby export H.264 code stream the coding mode indirect assignment of MB.
Described decision tree classification is followed following principle:
As Fig. 8, shown in Figure 9, be based on traffic information interactive interface and Video Events detection form that map vector shows.Functional overview is as follows:
Described worktable manages map vector, and real-time update.Road conditions, scenic spot information after data center's packing merge at worktable, form mapping.Worktable, marks on map vector information such as the speed of a motor vehicle, vehicle flowrate, visibility according to longitude and latitude, road area title, and explanations such as literal, color are provided.For the control point of main trunk road, on map vector, do respective markers, the Video Events of Polymera detects to provide H.264.Under the assistance of control module, worktable constantly and data center carry out alternately, with real-time and the validity of guaranteeing the TS code stream.
Based on above-mentioned functions, user's (PDA, notebook, mobile phone, car-mounted terminal etc.) on terminal device can know the trip route and traffic information, click described Button control, can eject the video behind the transcoding, show information such as real-time vehicle flowrate, visibility.By described map roaming, whether the user can browse information such as the current scenic spot volume of the flow of passengers, go on a journey with decision.
Claims (10)
1, the video monitoring guiding of incident and dissemination method comprise step: 1) traffic information collection is carried out at the road and the scenic spot of needs monitoring; 2) institute's Information Monitoring is handled and assessed; 3) described information is sent to terminal.It is characterized in that
In the described step 1), adopt one or more video capture devices to gather the video information at road and scenic spot;
Described step 2) in, the monitoring video flow of one or more forms that step 1) is obtained changes into one tunnel Polymera stream H.264;
Simultaneously, obtain video information, road conditions are assessed according to step 1); Control the signal lamp of corresponding intersection again according to analysis result, and generate the traffic status assessment figure of the road that needs supervision;
In the described step 3), Polymera H.264 spread give terminal and transmit by one or more network ports.
2, the video monitoring guiding of incident according to claim 1 and dissemination method is characterized in that in the described step 1), video information is admitted to the digital video host process earlier, handle the corresponding single-unit order transmission code stream TS that obtains; The form of described single-unit order transmission code stream TS comprises MPEG-2 and/or MPEG-4.
3, the video monitoring guiding of incident according to claim 2 and dissemination method is characterized in that in the described step 1), and the single-unit order transmission code stream TS of described one or more forms is step 2) in road conditions are assessed required monitoring code stream;
Described step 2) in, the single-unit order transmission code stream TS of one or more forms is changed into one tunnel Polymera stream H.264, be to the input single channel or multichannel single-unit order transmission code stream TS carries out video code conversion successively, video flowing is multiplexing and demultiplexing and multichannel program multiplexing H.264, export one tunnel Polymera stream H.264 at last;
Step is as follows:
Earlier video flowing is resolved: utilize H.264 Macroblock Mode Selection and the correlativity between the MPEG-2/MPEG-4 motion compensated residual, H.264 the selection of macro block mode is converted into data qualification, and the motion compensated residual, MB pattern, the coded block pattern that promptly utilize the MPEG-2/MPEG-4 decoding to obtain are mapped directly to macro block mode H.264; Decoder module is preserved relevant MB information, comprises the average and the variance of MB coding mode, encoding block type, MB residual error;
The H.264 scrambler that described H.264 coding is the employing standard obtains H.264 middle macro-block coding pattern to the YUV picture coding by decision tree; During coding,, and preserve H.264MB coding mode, thereby export H.264 code stream the coding mode indirect assignment of MB;
The principle that described decision tree classification is followed comprises:
1) list entries is divided into the sorter of Intra, Skip, Inter 16 * 16 and Inter8 * 8;
2) Inter 16 * 16 is divided into 16 * 16,16 * 8,8 * 16 sorter;
3) Inter 8 * 8 is divided into 8 * 8,8 * 4,4 * 8,4 * 4 sorter;
Described decision tree generates the principle of following and comprises:
1) if the MC of MPEG-2/MPEG-4MB does not encode, promptly there is not non-zero MV, 48 * 8
Piece does not have code coefficient, H.264MB will be encoded into 16 * 16, need to differentiate by the decision tree secondary,
Select optimization model;
2) if MPEG-2/MPEG-4MB is the Intra pattern, then in H.264, this MB is encoded into
Intra or Inter 8 * 8, if be encoded into Intra, algorithm stops; If Inter8 * 8 need to select optimization model by the secondary judgement;
3) if MPEG-2MB is the skip pattern, in H.264, this MB also is the skip pattern.
4, according to the video monitoring guiding and the dissemination method of claim 2 or 3 described incidents, it is characterized in that described step 2) in, road conditions are assessed content comprise: the vehicle flowrate of the congestion of road, the visibility of road, road and the speed of a motor vehicle etc.
5, a kind of video monitoring guiding and delivery system of realizing the described incident of claim 1 comprises road conditions information gathering system, signal Processing and control system, signal emission and transmission system and client terminal system, it is characterized in that
Described road conditions information gathering system comprises one or more rig cameras and digital video main frame, and the video information of each rig camera output is imported the video main frame into;
Described signal Processing and control system comprise center signal scheduling processing and road conditions signal evaluation regulator system:
1) center signal scheduling processing subsystem comprises: signal dispatching matrix, scrambler, CPU (signal controlling manager), packing device and video code conversion module H.264; Described CPU connects and is used for the storer of stored data base;
CPU to signal dispatching matrix, scrambler, signal monitoring testing apparatus, packing device, storer and H.264 the video code conversion module manage, carry out uploading, move and managing of material simultaneously, and clock sequence be provided; The vision signal input signal dispatch matrix of described video main frame output, the signal dispatching matrix adopts the distributed multi-stage matrix structure, reception is from the monitoring video flow at each crossing/scenic spot, its internal core comprises the dispatch matrix of input and output matrix, two complete mirror images of master control matrix at least, to realize the integrated dispatch and the backup of external signal in the data center; Scrambler carries out fusion treatment to video flowing between signal dispatching matrix and CPU; H.264 the video code conversion module is finished the conversion H.264 of all size TS flow direction; Packing device connects CPU, and the H.264 format video stream packing with H.264 video code conversion module output comes announcement information emission and transmission system by message queue;
2) road conditions signal evaluation regulator system comprises traffic information assessment regulation and control module and signal lamp regulation and control module, the Video stream information that traffic information assessment regulation and control module provides according to center signal scheduling processing subsystem, the road conditions situation is analyzed, sent control information to described signal lamp regulation and control module again.
Described signal emission comprises that with transmission system man-machine interactive platform is worktable, control module, protocol module and one or more network ports; Described control module connects the control man-machine interactive platform and the network port, and the protocol module input end connects the output terminal of described packing device, and the protocol module output terminal connects the network port.
6, the video monitoring guiding of incident according to claim 5 and delivery system is characterized in that described signal dispatching matrix is greater than 64 * 64.
7, the video monitoring guiding of incident according to claim 5 and delivery system is characterized in that described storer is a disk array, when storage data, data are cut into many sections, leave in respectively on each hard disk.
8, the video monitoring guiding of incident according to claim 5 and delivery system is characterized in that the described network port comprises: 3G network port, cdma network port, the GSM/GPRS network port, the CMMB network port, Broadcast Port, WLAN port, WiFi port, bluetooth port and internet side mouth.
9, the video monitoring guiding of incident according to claim 5 and delivery system is characterized in that described subscriber terminal equipment comprises: personal hand-held equipment PDA, 3G mobile, GSM/GPRS mobile phone, CDMA mobile phone, notebook, mobile TV, radio, office building LCD terminal and car-mounted terminal.
10, the video monitoring guiding of incident according to claim 5 and delivery system, it is characterized in that also comprising the signal monitoring testing apparatus, the signal monitoring testing apparatus is assessed to system internal test with to the operation conditions of watch-dog, and sends the result to CPU.
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