CN112019816A - Train stream media transmission device and video monitoring system - Google Patents
Train stream media transmission device and video monitoring system Download PDFInfo
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- CN112019816A CN112019816A CN202010915027.9A CN202010915027A CN112019816A CN 112019816 A CN112019816 A CN 112019816A CN 202010915027 A CN202010915027 A CN 202010915027A CN 112019816 A CN112019816 A CN 112019816A
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/643—Communication protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
- H04N5/44504—Circuit details of the additional information generator, e.g. details of the character or graphics signal generator, overlay mixing circuits
Abstract
The invention relates to a train flow media transmission device and a video monitoring system, wherein the train flow media transmission device comprises a data transmission unit, a communication interface unit and a power interface unit, wherein the communication interface unit is connected with the data transmission unit; the data transmission unit is provided with: the data acquisition module is used for acquiring real-time train state data and video images; the area management module extracts image information to be superposed from the real-time state data of the train, sets the image information as an OSD image, and superposes the decoded video image of the train; the data processing module is used for decoding the train video images, modifying the resolution and encoding the superposed video images; the data caching module is used for caching video image data; and the remote calling module is used for remotely calling the video image data. The invention combines and applies the basic state data of the train and the video image data, realizes the control of the whole state of the train and enhances the real-time monitoring capability of the train.
Description
Technical Field
The invention belongs to the technical field of rail transit, relates to a rail transit video monitoring technology, and particularly relates to a train stream media transmission device and a video monitoring system.
Background
In the development process of rail transit, no matter high-speed rail, subway or other rail trains, video monitoring is an indispensable component and is the most intuitive expression of vehicle states.
In the rail transit industry, video monitoring is mature, but at present, most of on-line video monitoring of urban rail vehicles can be checked in real time only by relevant workers of a control center (short for OCC), and relevant workers of a vehicle section overhaul center (short for DCC) download video data for checking only after vehicles return to a warehouse. When a vehicle has a fault on the main line, the DCC cannot visually monitor the state of the vehicle, the current situation of the vehicle can be known only through the traffic dispatching and the dictation of a station keeper, and the instantaneity and the reliability cannot be guaranteed. And the video data and the vehicle data lack relevance, the vehicle data need to be compared through a time axis, and the fault removal time is long.
Disclosure of Invention
The invention provides a train stream media transmission device and a video monitoring system, aiming at the problems that the time for removing the fault is long and the like caused by the fact that the maintenance staff cannot monitor the state of the train visually when the train has the fault in the existing track traffic vehicle video monitoring process, the real-time state information of the train and the real-time video information can be perfectly combined together, the control of the relative staff of a DCC (data communication control) on the whole state of the train is facilitated, and the real-time monitoring capability of the train is enhanced.
In order to achieve the above object, the present invention provides a train stream media transmission device, which includes a data transmission unit, a communication interface unit connected to the data transmission unit, and a power interface unit connected to an external power supply, wherein the power interface unit provides a DC5V power supply for the data transmission unit; the data transmission unit is provided with:
the data acquisition module is used for acquiring real-time train state data and video images;
the area management module is used for extracting image information to be superposed from the acquired real-time train state data and setting the image information as an OSD image;
the data processing module is used for decoding the acquired train video images, modifying the resolution, superposing the set OSD images and coding the result images;
the data caching module is used for caching the video image data after the coding processing;
and the remote calling module is used for remotely calling the cached video stream data.
The network card expansion unit comprises a PCIE \ USB network card expansion unit and a PCI network card expansion unit connected with the communication interface unit, the PCI network card expansion unit is connected with the data acquisition module through an Ethernet switching unit, and the PCIE \ USB network card expansion unit is connected with the data acquisition module.
Preferably, the communication interface unit includes a first communication interface unit and a second communication interface unit, the PCI network card expansion unit is connected with the first communication interface unit, the PCI network card expansion unit is connected with the ethernet switching unit through a first network transformer, the second communication interface unit is connected with the ethernet switching unit through a second network transformer, the ethernet switching unit is connected with the data acquisition module through a third network transformer, and the PCIE \ USB network card expansion unit is connected with the second communication interface unit through a fourth network transformer.
Preferably, the data processing module includes:
the video input module is connected with the data acquisition module and used for acquiring video images and real-time train state data, cutting, zooming and mirroring the video images and outputting the video images with different resolutions;
the video coding module is used for overlapping the video image output by the video input module, the real-time train state data and the OSD image set by the area management module, then coding according to different protocols and outputting corresponding video code streams;
the video decoding module is used for decoding the video code stream coded by the video coding module and outputting a video image;
the video processing module is used for carrying out denoising, image enhancement and sharpening on the video images output by the video input module and the video decoding module;
and the video output module is used for carrying out playing control processing on the image processed by the video processing module and outputting the image to the data caching module according to an output protocol configured by a user.
And the 4G module is connected with the data cache module, communicates with the ground server through the 4G module, and transmits the video image data stored in the data cache module to the ground server.
Further, the power supply unit is connected with the power interface unit and used for converting DC5V voltage into DC3.8V, DC3.3V, DC2.5V, DC1.5V and DC1.2V voltage for outputting, and supplying power to the PCI network card expansion unit, the Ethernet switching unit, the PCIE \ USB network card expansion unit, the first network transformer, the second network transformer, the third network transformer, the fourth network transformer and the 4G module.
The remote calling module is arranged in a ground server of the video monitoring system, the first communication interface unit and the power interface unit are arranged on a bottom plate of the installation board card, and the second communication interface unit is arranged on a front panel of the installation board card; the PCI network card expansion unit, the Ethernet exchange unit, the PCIE \ USB network card expansion unit, the first network transformer, the second network transformer, the third network transformer, the fourth network transformer and the 4G module are all arranged on the mounting plate.
The system also comprises a fault exception handling module and an indicator light module, wherein the fault handling module is used for recording and managing logs of each module and controlling an indicator light of the indicator light module.
In order to achieve the above object, the present invention further provides a video monitoring system, including:
the video acquisition device is used for acquiring a train video image and train real-time state data in real time;
the vehicle-mounted data center unit is connected with the video acquisition module;
the stream media transmission device is connected with the vehicle-mounted data center unit, and adopts the train stream media transmission device;
the ground server comprises a web server, a streaming media server and a webpage front end, wherein the webpage front end is provided with a video monitoring module, a remote calling module of the train streaming media transmission device is installed in the streaming media server, and the video monitoring module is connected with the remote calling module.
Preferably, the streaming media server is further provided with a content management module, a server support module and an access control module, wherein the content management module is used for managing the RTMP requests and responses related to the media sources, the server support module is used for executing the collection and recording of server data, and the access control module is used for providing authentication and authorization and supporting the operation of URL paths.
Compared with the prior art, the invention has the advantages and positive effects that:
the invention combines and applies the basic state data of the train and the video image data, realizes the control of the whole state of the train and enhances the real-time monitoring capability of the train. For the faults which need to be solved urgently on the main line, a driver or related personnel is assisted to remove the faults, the influence of the factors on the exaggerated faults is avoided, and the times of clearing the passengers and the occurrence of the faults at a later point are reduced; for the fault needing to be returned to the warehouse for maintenance, a maintenance plan can be made in advance according to the vehicle condition fed back by the video, and the maintenance efficiency is improved. The video monitoring system of the invention also utilizes the ground server to manage the train and the related equipment.
Drawings
FIG. 1 is a block diagram of a train streaming media transmission device according to an embodiment of the present invention;
fig. 2 is a block diagram of a data processing module according to an embodiment of the present invention.
In the figure, 1, a power interface unit, 2, a data acquisition module, 3, a region management module, 4, a data processing module, 401, a video input module, 402, a video encoding module, 403, a video decoding module, 404, a video processing module, 405, a video output module, 5, a data caching module, 6, a remote calling module, 7, a PCIE \ USB network card expansion unit, 8, a PCI network card expansion unit, 9, an ethernet switching unit, 10, a first communication interface unit, 11, a second communication interface unit, 12, a first network transformer, 13, a second network transformer, 14, a third network transformer, 15, a fourth network transformer, 16, 4G modules, 17, a power supply unit, 18, a ground server, 19, an installation board, 20, a core board, 21, a bottom board, 22, and a front panel.
Detailed Description
The invention is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Example 1: referring to fig. 1, the present embodiment provides a train streaming media transmission device, including a data transmission unit, a communication interface unit connected to the data transmission unit, and a power interface unit 1 connected to an external power supply, where the power interface unit 1 provides a DC5V power supply for the data transmission unit; the data transmission unit is provided with:
the data acquisition module 2 is used for acquiring real-time train state data and video images;
the area management module 3 is used for extracting image information to be superposed from the acquired video image and setting the image information as an OSD image;
the data processing module 4 is used for overlapping the acquired real-time train state data, the video image and the set OSD image;
the data caching module 5 is used for caching the video image data after the superposition processing;
and the remote calling module 6 is used for remotely calling the cached video stream data.
With reference to fig. 1, the train flow media transmission device further includes a network card expansion unit, where the network card expansion unit includes a PCIE \ USB network card expansion unit 7 and a PCI network card expansion unit 8 connected to the communication interface unit, the PCI network card expansion unit 8 is connected to the data acquisition module 2 through an ethernet switching unit 9, and the PCIE \ USB network card expansion unit 7 is connected to the data acquisition module 2. The PCI network card expansion unit and the PCIE/USB network card expansion unit are adopted to carry out network card expansion, wherein the PCI network card expansion unit is a network component working on a data link layer and is an interface for connecting a computer and a transmission medium in a local area network, not only can physical connection and electric signal matching between the PCI network card expansion unit and the transmission medium of the local area network be realized, but also the functions of frame sending and receiving, frame packaging and unpacking, medium access control, data coding and decoding and data caching are involved, and train real-time state data and video image data stored in a train vehicle-mounted data center unit are transmitted to a data acquisition module through the PCI network card expansion unit.
In particular, with continued reference to fig. 1, the communication interface unit includes a first communication interface unit 10 and a second communication interface unit 11, the PCI network card expansion unit 8 is connected with the first communication interface unit 10, the PCI network card expansion unit 8 is connected with the ethernet switching unit 9 through a first network transformer 12, the second communication interface unit 11 is connected to the ethernet switching unit 9 via a second network transformer 13, the PCI network card expansion unit 8 is connected to the ethernet switching unit 9 through a first network transformer 12, the second communication interface unit 11 is connected to the ethernet switching unit 9 via a second network transformer 13, the ethernet switching unit 9 is connected to the data acquisition module 2 via a third network transformer 14, the PCIE \ USB network card expansion unit 7 is connected to the second communication interface unit 11 through a fourth network transformer 15. The first communication interface unit is provided with a PCI interface, and the second communication interface unit is provided with an Ethernet interface, a debugging interface and a wireless communication interface. The gigabit interface of the vehicle-mounted camera, the debugging port and the data processing unit is synchronously accessed into the Ethernet switching unit, so that each pair of mutually communicated modules can transmit data without conflict like exclusive communication media. The second communication interface unit is connected with the data cache module and the Ethernet switching unit through a network transformer, and the network transformer is mainly used for signal level coupling, so that signals can be enhanced, the transmission distance of the signals is longer, the train flow media transmission device is isolated from the outside, and the protection effect (such as lightning stroke) on the train flow media transmission device is increased. And when the network ports with different levels are connected, the mutual equipment cannot be influenced.
Specifically, the data processing module 4 includes:
the video input module 401 is connected with the data acquisition module 2, and is used for acquiring a video image and real-time train state data, performing cutting, scaling and mirror image processing on the video image, and outputting image data with different resolutions;
the video coding module 402 is used for overlapping the video image output by the video input module, the real-time train state data and the OSD image set by the area management module, then coding according to different protocols and outputting corresponding video code streams;
a video decoding module 403, configured to decode the video code stream encoded by the video encoding module, and output a video image; specifically, the video decoding module can decode the video code stream in H.264/H.265/VC1/MPEG4/MPEG2/AVS format.
The video processing module 404 is configured to perform denoising, image enhancement and sharpening on the video images output by the video input module and the video decoding module; the video processing module can also realize that the same source outputs a plurality of paths of images with different resolutions for coding, previewing or capturing.
The video output module 405 is configured to perform play control processing on the image processed by the video processing module, and output the image to the data caching module according to an output protocol configured by a user;
with continued reference to fig. 1, the train streaming media transmission device further includes a 4G module 16, where the 4G module 16 is connected to the data cache module, and communicates with the ground server 17 through the 4G module 16 to transmit the video image data stored in the data cache module 5 to the ground server.
With reference to fig. 1, the train flow media transmission device further includes a power supply unit 18, where the power supply unit 18 is connected to the power interface unit 1, and is configured to convert the DC5V voltage into DC3.8V, DC3.3V, DC2.5V, DC1.5V, and DC1.2V voltage for outputting, and supply power to the PCI network card expansion unit, the ethernet switching unit, the PCIE \ USB network card expansion unit, the first network transformer, the second network transformer, the third network transformer, the fourth network transformer, and the 4G module. The power supply unit converts the input voltage of DC5V into DC3.8V, DC3.3V, DC2.5V, DC1.5V and DC1.2V outputs, and provides stable power supply for each unit and module to ensure normal operation of the units and modules. Specifically, DC3.8V is the power supply of the 4G module, DC3.3V is the power supply of the ethernet switching unit, the PCI network card expansion unit, and the PCIE \ USB network card expansion unit, DC2.5V is the power supply of the PCIE \ USB network card expansion unit, DC1.5V is the power supply of the PCI network card expansion unit, and DC1.2V is the power supply of the ethernet switching unit and the PCIE \ USB network card expansion unit.
With continued reference to fig. 1, the train flow media transmission device further includes an installation board 19, a core board 20 is disposed on the installation board 19, the data acquisition module 2, the area management module 3, the data processing module 4 and the data cache module 5 are disposed on the core board 20, the remote invocation module 6 is disposed in a ground server 17 of the video monitoring system, the first communication interface unit 10 and the power interface unit 1 are disposed on a bottom plate 21 of the installation board 19, and the second communication interface unit 11 is disposed on a front plate 22 of the installation board 19; the PCI network card expansion unit 8, the ethernet switching unit 9, the PCIE \ USB network card expansion unit 7, the first network transformer 12, the second network transformer 13, the third network transformer 14, the fourth network transformer 15, and the 4G module 16 are all mounted on the mounting plate 19. The integrated circuit board design is adopted, so that the integrated circuit board can be installed in an insertion mode, and is convenient to install, maintain and replace.
Specifically, the train flow media transmission device further comprises a fault exception handling module and an indicator light module, wherein the fault handling module is used for recording and managing logs of each module and controlling an indicator light of the indicator light module.
In this embodiment, the train streaming media transmission device acquires a vehicle-mounted video through an ethernet, and after being processed by the train streaming media transmission device, the train streaming media transmission device supports the following four transmission paths:
(1) the video landing is realized through the 4G module, and the video flow direction is as follows: the vehicle-mounted video input and PCI interface superposition information is input into the train stream media transmission device and output to the 4G module through the USB interface, so that vehicle-mounted video output is realized.
(2) The video landing is realized by borrowing other wireless channels through an Ethernet interface, and the video flow direction is as follows: the vehicle-mounted video input and the PCI interface superposition information are input into the train stream media transmission device, and output to the vehicle-mounted video is realized through the Ethernet interface through the hundred mega Ethernet.
(3) The video is transmitted to a data processing unit through a PCI interface, and then the video is landed through a 4G module, wherein the video flow direction is as follows: the vehicle-mounted video input is input into the data processing unit through the PCI interface and then output to the 4G module through the data interface, and vehicle-mounted video output is achieved.
(4) The video is transmitted to a data processing unit through a PCI interface, and then is dropped to the ground by other wireless channels through Ethernet interfaces, wherein the video flow direction is as follows: the vehicle-mounted video input is input into the data processing unit through the PCI interface, then is output to other modules through the Ethernet interface, and the vehicle-mounted video output is realized by means of other wireless channels.
Example 2: the embodiment provides a video monitoring system, including:
the video acquisition device is used for acquiring a train video image and train real-time state data in real time;
the vehicle-mounted data center unit is connected with the video acquisition module;
the system comprises a streaming media transmission device, a data center unit and a data center unit, wherein the streaming media transmission device is connected with the vehicle-mounted data center unit and adopts the train streaming media transmission device in embodiment 1;
the ground server comprises a web server, a streaming media server and a webpage front end, wherein the webpage front end is provided with a video monitoring module, a remote calling module of the train streaming media transmission device is installed in the streaming media server, and the video monitoring module is connected with the remote calling module.
Specifically, the streaming media server is further provided with a content management module, a server support module and an access control module, wherein the content management module is used for managing RTMP requests and responses related to media sources, the server support module is used for collecting and recording server data, and the access control module is used for providing authentication and authorization and supporting operation of URL paths.
The above-described embodiments are intended to illustrate rather than to limit the invention, and any modifications and variations of the present invention are possible within the spirit and scope of the claims.
Claims (10)
1. The train flow media transmission device is characterized by comprising a data transmission unit, a communication interface unit connected with the data transmission unit and a power interface unit connected with an external power supply, wherein the power interface unit provides a DC5V power supply for the data transmission unit; the data transmission unit is provided with:
the data acquisition module is used for acquiring real-time train state data and video images;
the area management module is used for extracting image information to be superposed from the acquired real-time train state data and setting the image information as an OSD image;
the data processing module is used for decoding the acquired train video images, modifying the resolution, superposing the set OSD images and coding the result images;
the data caching module is used for caching the video image data after the coding processing;
and the remote calling module is used for remotely calling the cached video stream data.
2. The train flow media transmission device of claim 1, further comprising a network card expansion unit, wherein the network card expansion unit comprises a PCIE \ USB network card expansion unit and a PCI network card expansion unit connected to the communication interface unit, the PCI network card expansion unit is connected to the data acquisition module through an ethernet switching unit, and the PCIE \ USB network card expansion unit is connected to the data acquisition module.
3. The train flow media transmission device of claim 2, wherein the communication interface unit includes a first communication interface unit and a second communication interface unit, the PCI network card expansion unit is connected with the first communication interface unit, the PCI network card expansion unit is connected with the ethernet switching unit through a first network transformer, the second communication interface unit is connected with the ethernet switching unit through a second network transformer, the ethernet switching unit is connected with the data acquisition module through a third network transformer, and the PCIE \ USB network card expansion unit is connected with the second communication interface unit through a fourth network transformer.
4. The train streaming media transmission device of claim 3, wherein the data processing module comprises:
the video input module is connected with the data acquisition module and used for acquiring video images and real-time train state data, cutting, zooming and mirroring the video images and outputting image data with different resolutions;
the video coding module is used for overlapping the video image output by the video input module, the real-time train state data and the OSD image set by the area management module, then coding according to different protocols and outputting corresponding video code streams;
the video decoding module is used for decoding the video code stream coded by the video coding module and outputting a video image;
the video processing module is used for carrying out denoising, image enhancement and sharpening on the video images output by the video input module and the video decoding module;
and the video output module is used for carrying out playing control processing on the image processed by the video processing module and outputting the image to the data caching module according to an output protocol configured by a user.
5. The train flow media transmission device according to claim 3 or 4, further comprising a 4G module, wherein the 4G module is connected with the data cache module and communicates with the ground server through the 4G module to transmit the video image data stored in the data cache module to the ground server.
6. The train flow media transmission device of claim 5, further comprising a power supply unit, connected to the power interface unit, for converting the DC5V voltage into DC3.8V, DC3.3V, DC2.5V, DC1.5V, DC1.2V output, and supplying power to the PCI network card expansion unit, the ethernet switching unit, the PCIE \ USB network card expansion unit, the first network transformer, the second network transformer, the third network transformer, the fourth network transformer, and the 4G module.
7. The train flow media transmission device according to claim 6, further comprising a mounting board card, wherein a core board card is arranged on the mounting board card, the data acquisition module, the area management module, the data processing module and the data cache module are arranged on the core board card, the remote calling module is arranged in a ground server of the video monitoring system, the first communication interface unit and the power interface unit are arranged on a bottom plate of the mounting board card, and the second communication interface unit is arranged on a front panel of the mounting board card; the PCI network card expansion unit, the Ethernet exchange unit, the PCIE \ USB network card expansion unit, the first network transformer, the second network transformer, the third network transformer, the fourth network transformer and the 4G module are all arranged on the mounting plate.
8. The train flow media transmission device according to claim 6, further comprising a fault exception handling module and an indicator light module, wherein the fault handling module is configured to record a log for managing each module and control an indicator light of the indicator light module.
9. A video surveillance system, comprising:
the video acquisition device is used for acquiring a train video image and train real-time state data in real time;
the vehicle-mounted data center unit is connected with the video acquisition module;
the streaming media transmission device is connected with the vehicle-mounted data center unit, and the streaming media transmission device adopts the train streaming media transmission device as claimed in any one of claims 1 to 8;
the ground server comprises a web server, a streaming media server and a webpage front end, wherein the web server and the webpage front end are used for data interaction, the webpage front end is provided with a video monitoring module, a remote calling module of the train streaming media transmission device is installed in the streaming media server, and the video monitoring module is connected with the remote calling module.
10. The video surveillance system of claim 9, wherein the streaming media server further comprises a content management module, a server support module and an access control module, wherein the content management module is configured to manage RTMP requests and responses currently associated with the media source, the server support module is configured to perform collection and recording of server data, and the access control module is configured to provide authentication and authorization and support operation URL path.
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| CN113163170A (en) * | 2021-04-21 | 2021-07-23 | 中国矿业大学 | System and method for superposing rail temperature, beam temperature state temperature and video of high-speed railway |
| CN113163170B (en) * | 2021-04-21 | 2022-07-26 | 中国矿业大学 | System and method for superposing rail temperature, beam temperature state temperature and video of high-speed railway |
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Application publication date: 20201201 |